mirror of
https://github.com/taigrr/nats.docs
synced 2025-01-18 04:03:23 -08:00
3277 lines
127 KiB
HTML
3277 lines
127 KiB
HTML
|
|
<!DOCTYPE HTML>
|
|
<html lang="" >
|
|
<head>
|
|
<meta charset="UTF-8">
|
|
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
|
|
<title>Draining Messages Before Disconnect ยท NATS</title>
|
|
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
|
|
<meta name="description" content="">
|
|
<meta name="generator" content="GitBook 3.2.3">
|
|
<meta name="author" content="The NATS Maintainers">
|
|
|
|
|
|
|
|
<link rel="stylesheet" href="../../gitbook/style.css">
|
|
|
|
|
|
|
|
|
|
<link rel="stylesheet" href="../../gitbook/gitbook-plugin-prism/prism.css">
|
|
|
|
|
|
|
|
<link rel="stylesheet" href="../../gitbook/gitbook-plugin-toggle-chapters/toggle.css">
|
|
|
|
|
|
|
|
<link rel="stylesheet" href="../../gitbook/gitbook-plugin-anchors/plugin.css">
|
|
|
|
|
|
|
|
<link rel="stylesheet" href="../../gitbook/gitbook-plugin-search/search.css">
|
|
|
|
|
|
|
|
<link rel="stylesheet" href="../../gitbook/gitbook-plugin-fontsettings/website.css">
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<meta name="HandheldFriendly" content="true"/>
|
|
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
|
|
<meta name="apple-mobile-web-app-capable" content="yes">
|
|
<meta name="apple-mobile-web-app-status-bar-style" content="black">
|
|
<link rel="apple-touch-icon-precomposed" sizes="152x152" href="../../gitbook/images/apple-touch-icon-precomposed-152.png">
|
|
<link rel="shortcut icon" href="../../gitbook/images/favicon.ico" type="image/x-icon">
|
|
|
|
|
|
<link rel="next" href="structure.html" />
|
|
|
|
|
|
<link rel="prev" href="queues.html" />
|
|
|
|
|
|
<link rel="stylesheet" href="https://cdn.materialdesignicons.com/3.6.95/css/materialdesignicons.min.css">
|
|
|
|
</head>
|
|
<body>
|
|
|
|
|
|
<div class="book">
|
|
<div class="book-summary">
|
|
|
|
|
|
<div id="book-search-input" role="search">
|
|
<input type="text" placeholder="Type to search" />
|
|
</div>
|
|
|
|
|
|
<nav role="navigation">
|
|
|
|
|
|
|
|
<ul class="summary">
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<li class="chapter " data-level="1.1" data-path="../../">
|
|
|
|
<a href="../../">
|
|
|
|
|
|
Introduction
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="1.2" data-path="../../whats_new/whats_new_20.html">
|
|
|
|
<a href="../../whats_new/whats_new_20.html">
|
|
|
|
|
|
What's New in 2.0
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="1.3" data-path="../../faq.html">
|
|
|
|
<a href="../../faq.html">
|
|
|
|
|
|
FAQ
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="1.4" >
|
|
|
|
<a target="_blank" href="https://nats.io">
|
|
|
|
|
|
nats.io
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
|
|
|
|
<li class="header">Concepts</li>
|
|
|
|
|
|
|
|
<li class="chapter " data-level="2.1" data-path="../concepts/intro.html">
|
|
|
|
<a href="../concepts/intro.html">
|
|
|
|
|
|
What is NATS
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="2.2" data-path="../concepts/subjects.html">
|
|
|
|
<a href="../concepts/subjects.html">
|
|
|
|
|
|
Subject-Based Messaging
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="2.3" data-path="../concepts/pubsub.html">
|
|
|
|
<a href="../concepts/pubsub.html">
|
|
|
|
|
|
Publish-Subscribe
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="2.4" data-path="../concepts/reqreply.html">
|
|
|
|
<a href="../concepts/reqreply.html">
|
|
|
|
|
|
Request-Reply
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="2.5" data-path="../concepts/queue.html">
|
|
|
|
<a href="../concepts/queue.html">
|
|
|
|
|
|
Queue Groups
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="2.6" data-path="../concepts/acks.html">
|
|
|
|
<a href="../concepts/acks.html">
|
|
|
|
|
|
Acknowledgements
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="2.7" data-path="../concepts/seq_num.html">
|
|
|
|
<a href="../concepts/seq_num.html">
|
|
|
|
|
|
Sequence Numbers
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
|
|
|
|
<li class="header">Developing With NATS</li>
|
|
|
|
|
|
|
|
<li class="chapter " data-level="3.1" data-path="../">
|
|
|
|
<a href="../">
|
|
|
|
|
|
Introduction
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.2" data-path="../connecting/intro.html">
|
|
|
|
<a href="../connecting/intro.html">
|
|
|
|
|
|
Connecting
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="3.2.1" data-path="../connecting/default_server.html">
|
|
|
|
<a href="../connecting/default_server.html">
|
|
|
|
|
|
Connecting to the Default Server
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.2.2" data-path="../connecting/specific_server.html">
|
|
|
|
<a href="../connecting/specific_server.html">
|
|
|
|
|
|
Connecting to a Specific Server
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.2.3" data-path="../connecting/cluster.html">
|
|
|
|
<a href="../connecting/cluster.html">
|
|
|
|
|
|
Connecting to a Cluster
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.2.4" data-path="../connecting/connect_timeout.html">
|
|
|
|
<a href="../connecting/connect_timeout.html">
|
|
|
|
|
|
Setting a Connect Timeout
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.2.5" data-path="../connecting/pingpong.html">
|
|
|
|
<a href="../connecting/pingpong.html">
|
|
|
|
|
|
Ping/Pong Protocol
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.2.6" data-path="../connecting/protocol.html">
|
|
|
|
<a href="../connecting/protocol.html">
|
|
|
|
|
|
Controlling the Client/Server Protocol
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.2.7" data-path="../connecting/noecho.html">
|
|
|
|
<a href="../connecting/noecho.html">
|
|
|
|
|
|
Turning Off Echo'd Messages
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.3" data-path="../reconnect/intro.html">
|
|
|
|
<a href="../reconnect/intro.html">
|
|
|
|
|
|
Automatic Reconnections
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="3.3.1" data-path="../reconnect/disable.html">
|
|
|
|
<a href="../reconnect/disable.html">
|
|
|
|
|
|
Disabling Reconnect
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.3.2" data-path="../reconnect/max.html">
|
|
|
|
<a href="../reconnect/max.html">
|
|
|
|
|
|
Set the Number of Reconnect Attempts
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.3.3" data-path="../reconnect/wait.html">
|
|
|
|
<a href="../reconnect/wait.html">
|
|
|
|
|
|
Pausing Between Reconnect Attempts
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.3.4" data-path="../reconnect/random.html">
|
|
|
|
<a href="../reconnect/random.html">
|
|
|
|
|
|
Avoiding the Thundering Herd
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.3.5" data-path="../reconnect/events.html">
|
|
|
|
<a href="../reconnect/events.html">
|
|
|
|
|
|
Listening for Reconnect Events
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.3.6" data-path="../reconnect/buffer.html">
|
|
|
|
<a href="../reconnect/buffer.html">
|
|
|
|
|
|
Buffering Messages During Reconnect Attempts
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.4" data-path="../security/intro.html">
|
|
|
|
<a href="../security/intro.html">
|
|
|
|
|
|
Securing Connections
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="3.4.1" data-path="../security/userpass.html">
|
|
|
|
<a href="../security/userpass.html">
|
|
|
|
|
|
Authenticating with a User and Password
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.4.2" data-path="../security/token.html">
|
|
|
|
<a href="../security/token.html">
|
|
|
|
|
|
Authenticating with a Token
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.4.3" data-path="../security/nkey.html">
|
|
|
|
<a href="../security/nkey.html">
|
|
|
|
|
|
Authenticating with an NKey
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.4.4" data-path="../security/creds.html">
|
|
|
|
<a href="../security/creds.html">
|
|
|
|
|
|
Authenticating with a Credentials File
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.4.5" data-path="../security/tls.html">
|
|
|
|
<a href="../security/tls.html">
|
|
|
|
|
|
Encrypting Connections with TLS
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.5" data-path="intro.html">
|
|
|
|
<a href="intro.html">
|
|
|
|
|
|
Receiving Messages
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="3.5.1" data-path="sync.html">
|
|
|
|
<a href="sync.html">
|
|
|
|
|
|
Synchronous Subscriptions
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.5.2" data-path="async.html">
|
|
|
|
<a href="async.html">
|
|
|
|
|
|
Asynchronous Subscriptions
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.5.3" data-path="unsubscribing.html">
|
|
|
|
<a href="unsubscribing.html">
|
|
|
|
|
|
Unsubscribing
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.5.4" data-path="unsub_after.html">
|
|
|
|
<a href="unsub_after.html">
|
|
|
|
|
|
Unsubscribing After N Messages
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.5.5" data-path="reply.html">
|
|
|
|
<a href="reply.html">
|
|
|
|
|
|
Replying to a Message
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.5.6" data-path="wildcards.html">
|
|
|
|
<a href="wildcards.html">
|
|
|
|
|
|
Wildcard Subscriptions
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.5.7" data-path="queues.html">
|
|
|
|
<a href="queues.html">
|
|
|
|
|
|
Queue Subscriptions
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter active" data-level="3.5.8" data-path="drain.html">
|
|
|
|
<a href="drain.html">
|
|
|
|
|
|
Draining Messages Before Disconnect
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.5.9" data-path="structure.html">
|
|
|
|
<a href="structure.html">
|
|
|
|
|
|
Structured Data
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.6" data-path="../sending/intro.html">
|
|
|
|
<a href="../sending/intro.html">
|
|
|
|
|
|
Sending Messages
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="3.6.1" data-path="../sending/replyto.html">
|
|
|
|
<a href="../sending/replyto.html">
|
|
|
|
|
|
Including a Reply Subject
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.6.2" data-path="../sending/request_reply.html">
|
|
|
|
<a href="../sending/request_reply.html">
|
|
|
|
|
|
Request-Reply Semantics
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.6.3" data-path="../sending/caches.html">
|
|
|
|
<a href="../sending/caches.html">
|
|
|
|
|
|
Caches, Flush and Ping
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.6.4" data-path="../sending/structure.html">
|
|
|
|
<a href="../sending/structure.html">
|
|
|
|
|
|
Sending Structured Data
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.7" data-path="../events/intro.html">
|
|
|
|
<a href="../events/intro.html">
|
|
|
|
|
|
Monitoring the Connection
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="3.7.1" data-path="../events/events.html">
|
|
|
|
<a href="../events/events.html">
|
|
|
|
|
|
Listen for Connection Events
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.7.2" data-path="../events/slow.html">
|
|
|
|
<a href="../events/slow.html">
|
|
|
|
|
|
Slow Consumers
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.8" data-path="../tutorials/intro.html">
|
|
|
|
<a href="../tutorials/intro.html">
|
|
|
|
|
|
Tutorials
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="3.8.1" data-path="../tutorials/pubsub.html">
|
|
|
|
<a href="../tutorials/pubsub.html">
|
|
|
|
|
|
Explore NATS Pub/Sub
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.8.2" data-path="../tutorials/reqreply.html">
|
|
|
|
<a href="../tutorials/reqreply.html">
|
|
|
|
|
|
Explore NATS Request/Reply
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.8.3" data-path="../tutorials/queues.html">
|
|
|
|
<a href="../tutorials/queues.html">
|
|
|
|
|
|
Explore NATS Queueing
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="3.8.4" data-path="../tutorials/custom_dialer.html">
|
|
|
|
<a href="../tutorials/custom_dialer.html">
|
|
|
|
|
|
Advanced Connect and Custom Dialer in Go
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
|
|
|
|
|
|
<li class="header">NATS Server</li>
|
|
|
|
|
|
|
|
<li class="chapter " data-level="4.1" data-path="../../nats_server/installation.html">
|
|
|
|
<a href="../../nats_server/installation.html">
|
|
|
|
|
|
Installing
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.2" data-path="../../nats_server/running.html">
|
|
|
|
<a href="../../nats_server/running.html">
|
|
|
|
|
|
Running
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="4.2.1" data-path="../../nats_server/windows_srv.html">
|
|
|
|
<a href="../../nats_server/windows_srv.html">
|
|
|
|
|
|
Window Service
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.3" data-path="../../nats_server/clients.html">
|
|
|
|
<a href="../../nats_server/clients.html">
|
|
|
|
|
|
Clients
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.4" data-path="../../nats_server/flags.html">
|
|
|
|
<a href="../../nats_server/flags.html">
|
|
|
|
|
|
Flags
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5" data-path="../../nats_server/configuration.html">
|
|
|
|
<a href="../../nats_server/configuration.html">
|
|
|
|
|
|
Configuration
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="4.5.1" data-path="../../nats_server/securing_nats.html">
|
|
|
|
<a href="../../nats_server/securing_nats.html">
|
|
|
|
|
|
Securing NATS
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="4.5.1.1" data-path="../../nats_server/tls.html">
|
|
|
|
<a href="../../nats_server/tls.html">
|
|
|
|
|
|
Enabling TLS
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.1.2" data-path="../../nats_server/auth_intro.html">
|
|
|
|
<a href="../../nats_server/auth_intro.html">
|
|
|
|
|
|
Authentication
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="4.5.1.2.1" data-path="../../nats_server/tokens.html">
|
|
|
|
<a href="../../nats_server/tokens.html">
|
|
|
|
|
|
Tokens
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.1.2.2" data-path="../../nats_server/username_password.html">
|
|
|
|
<a href="../../nats_server/username_password.html">
|
|
|
|
|
|
Username/Password
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.1.2.3" data-path="../../nats_server/tls_mutual_auth.html">
|
|
|
|
<a href="../../nats_server/tls_mutual_auth.html">
|
|
|
|
|
|
TLS Authentication
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.1.2.4" data-path="../../nats_server/nkey_auth.html">
|
|
|
|
<a href="../../nats_server/nkey_auth.html">
|
|
|
|
|
|
NKeys
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.1.2.5" data-path="../../nats_server/accounts.html">
|
|
|
|
<a href="../../nats_server/accounts.html">
|
|
|
|
|
|
Accounts
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.1.2.6" data-path="../../nats_server/jwt_auth.html">
|
|
|
|
<a href="../../nats_server/jwt_auth.html">
|
|
|
|
|
|
JWTs
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.1.2.7" data-path="../../nats_server/auth_timeout.html">
|
|
|
|
<a href="../../nats_server/auth_timeout.html">
|
|
|
|
|
|
Authentication Timeout
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.1.3" data-path="../../nats_server/authorization.html">
|
|
|
|
<a href="../../nats_server/authorization.html">
|
|
|
|
|
|
Authorization
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.2" data-path="../../nats_server/clustering.html">
|
|
|
|
<a href="../../nats_server/clustering.html">
|
|
|
|
|
|
Clustering
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="4.5.2.1" data-path="../../nats_server/cluster_config.html">
|
|
|
|
<a href="../../nats_server/cluster_config.html">
|
|
|
|
|
|
Configuration
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.2.2" data-path="../../nats_server/cluster_tls.html">
|
|
|
|
<a href="../../nats_server/cluster_tls.html">
|
|
|
|
|
|
TLS Authentication
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.3" data-path="../../gateways/">
|
|
|
|
<a href="../../gateways/">
|
|
|
|
|
|
Gateways
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="4.5.3.1" data-path="../../gateways/gateway.html">
|
|
|
|
<a href="../../gateways/gateway.html">
|
|
|
|
|
|
Configuration
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.4" data-path="../../leafnodes/">
|
|
|
|
<a href="../../leafnodes/">
|
|
|
|
|
|
Leaf Nodes
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="4.5.4.1" data-path="../../leafnodes/leafnode_conf.html">
|
|
|
|
<a href="../../leafnodes/leafnode_conf.html">
|
|
|
|
|
|
Configuration
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.5" data-path="../../nats_server/logging.html">
|
|
|
|
<a href="../../nats_server/logging.html">
|
|
|
|
|
|
Logging
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.6" data-path="../../nats_server/monitoring.html">
|
|
|
|
<a href="../../nats_server/monitoring.html">
|
|
|
|
|
|
Monitoring
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.6" data-path="../../nats_admin/">
|
|
|
|
<a href="../../nats_admin/">
|
|
|
|
|
|
Managing A NATS Server
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="4.6.1" data-path="../../nats_admin/upgrading_cluster.html">
|
|
|
|
<a href="../../nats_admin/upgrading_cluster.html">
|
|
|
|
|
|
Upgrading a Cluster
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.6.2" data-path="../../nats_admin/slow_consumers.html">
|
|
|
|
<a href="../../nats_admin/slow_consumers.html">
|
|
|
|
|
|
Slow Consumers
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.6.3" data-path="../../nats_admin/signals.html">
|
|
|
|
<a href="../../nats_admin/signals.html">
|
|
|
|
|
|
Signals
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.6.4" data-path="../../sys_accounts/">
|
|
|
|
<a href="../../sys_accounts/">
|
|
|
|
|
|
System Accounts
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="4.6.4.1" data-path="../../sys_accounts/sys_accounts.html">
|
|
|
|
<a href="../../sys_accounts/sys_accounts.html">
|
|
|
|
|
|
Configuration
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.7" data-path="../../nats_docker/">
|
|
|
|
<a href="../../nats_docker/">
|
|
|
|
|
|
NATS and Docker
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="4.7.1" data-path="../../nats_docker/nats-docker-tutorial.html">
|
|
|
|
<a href="../../nats_docker/nats-docker-tutorial.html">
|
|
|
|
|
|
Tutorial
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.7.2" data-path="../../nats_docker/docker_swarm.html">
|
|
|
|
<a href="../../nats_docker/docker_swarm.html">
|
|
|
|
|
|
Docker Swarm
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
|
|
|
|
|
|
<li class="header">NATS Tools</li>
|
|
|
|
|
|
|
|
<li class="chapter " data-level="5.1" data-path="../../nats_tools/mkpasswd.html">
|
|
|
|
<a href="../../nats_tools/mkpasswd.html">
|
|
|
|
|
|
mkpasswd
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.2" data-path="../../nats_tools/nk.html">
|
|
|
|
<a href="../../nats_tools/nk.html">
|
|
|
|
|
|
nk
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.3" data-path="../../nats_tools/nsc/">
|
|
|
|
<a href="../../nats_tools/nsc/">
|
|
|
|
|
|
nsc
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="5.3.1" data-path="../../nats_tools/nsc/nsc.html">
|
|
|
|
<a href="../../nats_tools/nsc/nsc.html">
|
|
|
|
|
|
Basics
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.3.2" data-path="../../nats_tools/nsc/streams.html">
|
|
|
|
<a href="../../nats_tools/nsc/streams.html">
|
|
|
|
|
|
Streams
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.3.3" data-path="../../nats_tools/nsc/services.html">
|
|
|
|
<a href="../../nats_tools/nsc/services.html">
|
|
|
|
|
|
Services
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.3.4" data-path="../../nats_tools/nsc/signing_keys.html">
|
|
|
|
<a href="../../nats_tools/nsc/signing_keys.html">
|
|
|
|
|
|
Signing Keys
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.4" data-path="../../nats_tools/nas/">
|
|
|
|
<a href="../../nats_tools/nas/">
|
|
|
|
|
|
nats-account-server
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="5.4.1" data-path="../../nats_tools/nas/nas_conf.html">
|
|
|
|
<a href="../../nats_tools/nas/nas_conf.html">
|
|
|
|
|
|
Basics
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.4.2" data-path="../../nats_tools/nas/inspecting_jwts.html">
|
|
|
|
<a href="../../nats_tools/nas/inspecting_jwts.html">
|
|
|
|
|
|
Inspecting JWTs
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.4.3" data-path="../../nats_tools/nas/dir_store.html">
|
|
|
|
<a href="../../nats_tools/nas/dir_store.html">
|
|
|
|
|
|
Directory Store
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.4.4" data-path="../../nats_tools/nas/notifications.html">
|
|
|
|
<a href="../../nats_tools/nas/notifications.html">
|
|
|
|
|
|
Update Notifications
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.4.5" data-path="../../nats_tools/nas/mem_resolver.html">
|
|
|
|
<a href="../../nats_tools/nas/mem_resolver.html">
|
|
|
|
|
|
Memory Resolver
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.5" data-path="../../nats_tools/nats_top/">
|
|
|
|
<a href="../../nats_tools/nats_top/">
|
|
|
|
|
|
nats-top
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="5.5.1" data-path="../../nats_tools/nats_top/nats-top-tutorial.html">
|
|
|
|
<a href="../../nats_tools/nats_top/nats-top-tutorial.html">
|
|
|
|
|
|
Tutorial
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.6" data-path="../../nats_tools/natsbench.html">
|
|
|
|
<a href="../../nats_tools/natsbench.html">
|
|
|
|
|
|
nats-bench
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
|
|
|
|
<li class="header">NATS Streaming Concepts</li>
|
|
|
|
|
|
|
|
<li class="chapter " data-level="6.1" data-path="../../nats_streaming/intro.html">
|
|
|
|
<a href="../../nats_streaming/intro.html">
|
|
|
|
|
|
Introduction
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="6.1.1" data-path="../../nats_streaming/relation-to-nats.html">
|
|
|
|
<a href="../../nats_streaming/relation-to-nats.html">
|
|
|
|
|
|
Relation to NATS
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="6.2" data-path="../../nats_streaming/client-connections.html">
|
|
|
|
<a href="../../nats_streaming/client-connections.html">
|
|
|
|
|
|
Client Connections
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="6.3" data-path="../../nats_streaming/channels/channels.html">
|
|
|
|
<a href="../../nats_streaming/channels/channels.html">
|
|
|
|
|
|
Channels
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="6.3.1" data-path="../../nats_streaming/channels/message-log.html">
|
|
|
|
<a href="../../nats_streaming/channels/message-log.html">
|
|
|
|
|
|
Message Log
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="6.3.2" data-path="../../nats_streaming/channels/subscriptions/subscriptions.html">
|
|
|
|
<a href="../../nats_streaming/channels/subscriptions/subscriptions.html">
|
|
|
|
|
|
Subscriptions
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="6.3.2.1" data-path="../../nats_streaming/channels/subscriptions/regular.html">
|
|
|
|
<a href="../../nats_streaming/channels/subscriptions/regular.html">
|
|
|
|
|
|
Regular
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="6.3.2.2" data-path="../../nats_streaming/channels/subscriptions/durable.html">
|
|
|
|
<a href="../../nats_streaming/channels/subscriptions/durable.html">
|
|
|
|
|
|
Durable
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="6.3.2.3" data-path="../../nats_streaming/channels/subscriptions/queue-group.html">
|
|
|
|
<a href="../../nats_streaming/channels/subscriptions/queue-group.html">
|
|
|
|
|
|
Queue Group
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="6.3.2.4" data-path="../../nats_streaming/channels/subscriptions/redelivery.html">
|
|
|
|
<a href="../../nats_streaming/channels/subscriptions/redelivery.html">
|
|
|
|
|
|
Redelivery
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="6.4" data-path="../../nats_streaming/store-interface.html">
|
|
|
|
<a href="../../nats_streaming/store-interface.html">
|
|
|
|
|
|
Store Interface
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="6.5" data-path="../../nats_streaming/store-encryption.html">
|
|
|
|
<a href="../../nats_streaming/store-encryption.html">
|
|
|
|
|
|
Store Encryption
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="6.6" data-path="../../nats_streaming/clustering/clustering.html">
|
|
|
|
<a href="../../nats_streaming/clustering/clustering.html">
|
|
|
|
|
|
Clustering
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="6.6.1" data-path="../../nats_streaming/clustering/supported-stores.html">
|
|
|
|
<a href="../../nats_streaming/clustering/supported-stores.html">
|
|
|
|
|
|
Supported Stores
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="6.6.2" data-path="../../nats_streaming/clustering/configuration.html">
|
|
|
|
<a href="../../nats_streaming/clustering/configuration.html">
|
|
|
|
|
|
Configuration
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="6.6.3" data-path="../../nats_streaming/clustering/auto-configuration.html">
|
|
|
|
<a href="../../nats_streaming/clustering/auto-configuration.html">
|
|
|
|
|
|
Auto Configuration
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="6.6.4" data-path="../../nats_streaming/clustering/containers.html">
|
|
|
|
<a href="../../nats_streaming/clustering/containers.html">
|
|
|
|
|
|
Containers
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="6.7" data-path="../../nats_streaming/fault-tolerance/ft.html">
|
|
|
|
<a href="../../nats_streaming/fault-tolerance/ft.html">
|
|
|
|
|
|
Fault Tolerance
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="6.7.1" data-path="../../nats_streaming/fault-tolerance/active-server.html">
|
|
|
|
<a href="../../nats_streaming/fault-tolerance/active-server.html">
|
|
|
|
|
|
Active Server
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="6.7.2" data-path="../../nats_streaming/fault-tolerance/standby-server.html">
|
|
|
|
<a href="../../nats_streaming/fault-tolerance/standby-server.html">
|
|
|
|
|
|
Standby Servers
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="6.7.3" data-path="../../nats_streaming/fault-tolerance/shared-state.html">
|
|
|
|
<a href="../../nats_streaming/fault-tolerance/shared-state.html">
|
|
|
|
|
|
Shared State
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="6.7.4" data-path="../../nats_streaming/fault-tolerance/failover.html">
|
|
|
|
<a href="../../nats_streaming/fault-tolerance/failover.html">
|
|
|
|
|
|
Failover
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="6.8" data-path="../../nats_streaming/partitioning.html">
|
|
|
|
<a href="../../nats_streaming/partitioning.html">
|
|
|
|
|
|
Partitioning
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
|
|
|
|
<li class="header">Developing With NATS Streaming</li>
|
|
|
|
|
|
|
|
<li class="chapter " data-level="7.1" data-path="../streaming/">
|
|
|
|
<a href="../streaming/">
|
|
|
|
|
|
Introduction
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="7.2" data-path="../streaming/connecting.html">
|
|
|
|
<a href="../streaming/connecting.html">
|
|
|
|
|
|
Connecting to NATS Streaming
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="7.3" data-path="../streaming/publishing.html">
|
|
|
|
<a href="../streaming/publishing.html">
|
|
|
|
|
|
Publishing to a Channel
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="7.4" data-path="../streaming/receiving.html">
|
|
|
|
<a href="../streaming/receiving.html">
|
|
|
|
|
|
Receiving Messages from a Channel
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="7.5" data-path="../streaming/durables.html">
|
|
|
|
<a href="../streaming/durables.html">
|
|
|
|
|
|
Durable Subscriptions
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="7.6" data-path="../streaming/queues.html">
|
|
|
|
<a href="../streaming/queues.html">
|
|
|
|
|
|
Queue Subscriptions
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="7.7" data-path="../streaming/acks.html">
|
|
|
|
<a href="../streaming/acks.html">
|
|
|
|
|
|
Acknowledgements
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="7.8" data-path="../streaming/protocol.html">
|
|
|
|
<a href="../streaming/protocol.html">
|
|
|
|
|
|
The Streaming Protocol
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
|
|
|
|
<li class="header">NATS Streaming Server</li>
|
|
|
|
|
|
|
|
<li class="chapter " data-level="8.1" data-path="../../nats_streaming/gettingstarted/install.html">
|
|
|
|
<a href="../../nats_streaming/gettingstarted/install.html">
|
|
|
|
|
|
Installing
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="8.2" data-path="../../nats_streaming/gettingstarted/run.html">
|
|
|
|
<a href="../../nats_streaming/gettingstarted/run.html">
|
|
|
|
|
|
Running
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="8.3" data-path="../../nats_streaming/gettingstarted/configuring.html">
|
|
|
|
<a href="../../nats_streaming/gettingstarted/configuring.html">
|
|
|
|
|
|
Configuring
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="8.4" data-path="../../nats_streaming/gettingstarted/tls.html">
|
|
|
|
<a href="../../nats_streaming/gettingstarted/tls.html">
|
|
|
|
|
|
Securing
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="8.5" data-path="../../nats_streaming/gettingstarted/process-signaling.html">
|
|
|
|
<a href="../../nats_streaming/gettingstarted/process-signaling.html">
|
|
|
|
|
|
Process Signaling
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="8.6" data-path="../../nats_streaming/gettingstarted/windows-service.html">
|
|
|
|
<a href="../../nats_streaming/gettingstarted/windows-service.html">
|
|
|
|
|
|
Windows Service
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="8.7" data-path="../streaming/embedding.html">
|
|
|
|
<a href="../streaming/embedding.html">
|
|
|
|
|
|
Embedding NATS Streaming Server
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="8.8" data-path="../../nats_streaming/swarm.html">
|
|
|
|
<a href="../../nats_streaming/swarm.html">
|
|
|
|
|
|
Docker Swarm
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="8.9" data-path="../../nats_streaming/monitoring/monitoring.html">
|
|
|
|
<a href="../../nats_streaming/monitoring/monitoring.html">
|
|
|
|
|
|
Monitoring
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="8.9.1" data-path="../../nats_streaming/monitoring/endpoints.html">
|
|
|
|
<a href="../../nats_streaming/monitoring/endpoints.html">
|
|
|
|
|
|
Endpoints
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
|
|
|
|
|
|
<li class="header">NATS Protocol</li>
|
|
|
|
|
|
|
|
<li class="chapter " data-level="9.1" data-path="../../nats_protocol/nats-protocol-demo.html">
|
|
|
|
<a href="../../nats_protocol/nats-protocol-demo.html">
|
|
|
|
|
|
Protocol Demo
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="9.2" data-path="../../nats_protocol/nats-protocol.html">
|
|
|
|
<a href="../../nats_protocol/nats-protocol.html">
|
|
|
|
|
|
Client Protocol
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="9.2.1" data-path="../../nats_protocol/nats-client-dev.html">
|
|
|
|
<a href="../../nats_protocol/nats-client-dev.html">
|
|
|
|
|
|
Developing a Client
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="9.3" data-path="../../nats_protocol/nats-server-protocol.html">
|
|
|
|
<a href="../../nats_protocol/nats-server-protocol.html">
|
|
|
|
|
|
NATS Cluster Protocol
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
|
|
|
|
<li class="divider"></li>
|
|
|
|
<li>
|
|
<a href="https://www.gitbook.com" target="blank" class="gitbook-link">
|
|
Published with GitBook
|
|
</a>
|
|
</li>
|
|
</ul>
|
|
|
|
|
|
</nav>
|
|
|
|
|
|
</div>
|
|
|
|
<div class="book-body">
|
|
|
|
<div class="body-inner">
|
|
|
|
|
|
|
|
<div class="book-header" role="navigation">
|
|
|
|
|
|
<!-- Title -->
|
|
<h1>
|
|
<i class="fa fa-circle-o-notch fa-spin"></i>
|
|
<a href="../.." >Draining Messages Before Disconnect</a>
|
|
</h1>
|
|
</div>
|
|
|
|
|
|
|
|
|
|
<div class="page-wrapper" tabindex="-1" role="main">
|
|
<div class="page-inner">
|
|
|
|
<div id="book-search-results">
|
|
<div class="search-noresults">
|
|
|
|
<section class="normal markdown-section">
|
|
|
|
<h1 id="draining-connections-and-subscriptions"><a name="draining-connections-and-subscriptions" class="plugin-anchor" href="#draining-connections-and-subscriptions"><i class="fa fa-link" aria-hidden="true"></i></a>Draining Connections and Subscriptions</h1>
|
|
<p>A feature recently added across the NATS client libraries is the ability to drain connections or subscriptions. Closing a connection, or unsubscribing from a subscription, are generally considered immediate requests. When you close or unsubscribe the library will halt messages in any pending queue or cache for subscribers. When you drain a subscription or connection, it will process any inflight and cached/pending messages before closing.</p>
|
|
<p>Drain provides clients that use queue subscriptions with a way to bring down applications without losing any messages. A client can bring up a new queue member, drain and shut down the old queue member, all without losing messages sent to the old client. Without drain, there is the possibility of lost messages due to delivery timing.</p>
|
|
<p>The libraries can provide drain on a connection or on a subscriber, or both.</p>
|
|
<p>For a connection the process is essentially:</p>
|
|
<ol>
|
|
<li>Drain all subscriptions</li>
|
|
<li>Stop new messages from being published</li>
|
|
<li>Flush any remaining published messages</li>
|
|
<li>Close</li>
|
|
</ol>
|
|
<p>The API for drain can generally be used instead of close:</p>
|
|
<p>As an example of draining a connection:</p>
|
|
<div class="tab-wrap">
|
|
|
|
|
|
<input type="radio" id="drain_conn_go" name="drain_conn" class="tab" checked>
|
|
|
|
<label for="drain_conn_go" class="api-lang" data-language="go">Go</label>
|
|
|
|
|
|
<input type="radio" id="drain_conn_java" name="drain_conn" class="tab">
|
|
|
|
<label for="drain_conn_java" class="api-lang" data-language="java">Java</label>
|
|
|
|
|
|
<input type="radio" id="drain_conn_js" name="drain_conn" class="tab">
|
|
|
|
<label for="drain_conn_js" class="api-lang" data-language="js">JavaScript</label>
|
|
|
|
|
|
<input type="radio" id="drain_conn_py" name="drain_conn" class="tab">
|
|
|
|
<label for="drain_conn_py" class="api-lang" data-language="py">Python</label>
|
|
|
|
|
|
<input type="radio" id="drain_conn_ruby" name="drain_conn" class="tab">
|
|
|
|
<label for="drain_conn_ruby" class="api-lang" data-language="ruby">Ruby</label>
|
|
|
|
|
|
<input type="radio" id="drain_conn_ts" name="drain_conn" class="tab">
|
|
|
|
<label for="drain_conn_ts" class="api-lang" data-language="ts">TypeScript</label>
|
|
|
|
|
|
|
|
<div class="tab__content">
|
|
<pre id="drain_conn_go_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/go-nats-examples/blob/master/api-examples/drain_conn/main.go#L12-64"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-go">wg <span class="token operator">:=</span> sync<span class="token punctuation">.</span>WaitGroup<span class="token punctuation">{</span><span class="token punctuation">}</span>
|
|
wg<span class="token punctuation">.</span><span class="token function">Add</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">)</span>
|
|
|
|
errCh <span class="token operator">:=</span> <span class="token function">make</span><span class="token punctuation">(</span><span class="token keyword">chan</span> <span class="token builtin">error</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span>
|
|
|
|
<span class="token comment">// To simulate a timeout, you would set the DrainTimeout()</span>
|
|
<span class="token comment">// to a value less than the time spent in the message callback,</span>
|
|
<span class="token comment">// so say: nats.DrainTimeout(10*time.Millisecond).</span>
|
|
|
|
nc<span class="token punctuation">,</span> err <span class="token operator">:=</span> nats<span class="token punctuation">.</span><span class="token function">Connect</span><span class="token punctuation">(</span><span class="token string">"demo.nats.io"</span><span class="token punctuation">,</span>
|
|
nats<span class="token punctuation">.</span><span class="token function">DrainTimeout</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token operator">*</span>time<span class="token punctuation">.</span>Second<span class="token punctuation">)</span><span class="token punctuation">,</span>
|
|
nats<span class="token punctuation">.</span><span class="token function">ErrorHandler</span><span class="token punctuation">(</span><span class="token keyword">func</span><span class="token punctuation">(</span><span class="token boolean">_</span> <span class="token operator">*</span>nats<span class="token punctuation">.</span>Conn<span class="token punctuation">,</span> <span class="token boolean">_</span> <span class="token operator">*</span>nats<span class="token punctuation">.</span>Subscription<span class="token punctuation">,</span> err <span class="token builtin">error</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
|
|
errCh <span class="token operator"><-</span> err
|
|
<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
|
|
nats<span class="token punctuation">.</span><span class="token function">ClosedHandler</span><span class="token punctuation">(</span><span class="token keyword">func</span><span class="token punctuation">(</span><span class="token boolean">_</span> <span class="token operator">*</span>nats<span class="token punctuation">.</span>Conn<span class="token punctuation">)</span> <span class="token punctuation">{</span>
|
|
wg<span class="token punctuation">.</span><span class="token function">Done</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
|
|
<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
|
|
<span class="token keyword">if</span> err <span class="token operator">!=</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
|
|
log<span class="token punctuation">.</span><span class="token function">Fatal</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span>
|
|
<span class="token punctuation">}</span>
|
|
|
|
<span class="token comment">// Just to not collide using the demo server with other users.</span>
|
|
subject <span class="token operator">:=</span> nats<span class="token punctuation">.</span><span class="token function">NewInbox</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
|
|
|
|
<span class="token comment">// Subscribe, but add some delay while processing.</span>
|
|
<span class="token keyword">if</span> <span class="token boolean">_</span><span class="token punctuation">,</span> err <span class="token operator">:=</span> nc<span class="token punctuation">.</span><span class="token function">Subscribe</span><span class="token punctuation">(</span>subject<span class="token punctuation">,</span> <span class="token keyword">func</span><span class="token punctuation">(</span><span class="token boolean">_</span> <span class="token operator">*</span>nats<span class="token punctuation">.</span>Msg<span class="token punctuation">)</span> <span class="token punctuation">{</span>
|
|
time<span class="token punctuation">.</span><span class="token function">Sleep</span><span class="token punctuation">(</span><span class="token number">200</span> <span class="token operator">*</span> time<span class="token punctuation">.</span>Millisecond<span class="token punctuation">)</span>
|
|
<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span> err <span class="token operator">!=</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
|
|
log<span class="token punctuation">.</span><span class="token function">Fatal</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span>
|
|
<span class="token punctuation">}</span>
|
|
|
|
<span class="token comment">// Publish a message</span>
|
|
<span class="token keyword">if</span> err <span class="token operator">:=</span> nc<span class="token punctuation">.</span><span class="token function">Publish</span><span class="token punctuation">(</span>subject<span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token function">byte</span><span class="token punctuation">(</span><span class="token string">"hello"</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> err <span class="token operator">!=</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
|
|
log<span class="token punctuation">.</span><span class="token function">Fatal</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span>
|
|
<span class="token punctuation">}</span>
|
|
|
|
<span class="token comment">// Drain the connection, which will close it when done.</span>
|
|
<span class="token keyword">if</span> err <span class="token operator">:=</span> nc<span class="token punctuation">.</span><span class="token function">Drain</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> err <span class="token operator">!=</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
|
|
log<span class="token punctuation">.</span><span class="token function">Fatal</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span>
|
|
<span class="token punctuation">}</span>
|
|
|
|
<span class="token comment">// Wait for the connection to be closed.</span>
|
|
wg<span class="token punctuation">.</span><span class="token function">Wait</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
|
|
|
|
<span class="token comment">// Check if there was an error</span>
|
|
<span class="token keyword">select</span> <span class="token punctuation">{</span>
|
|
<span class="token keyword">case</span> e <span class="token operator">:=</span> <span class="token operator"><-</span>errCh<span class="token punctuation">:</span>
|
|
log<span class="token punctuation">.</span><span class="token function">Fatal</span><span class="token punctuation">(</span>e<span class="token punctuation">)</span>
|
|
<span class="token keyword">default</span><span class="token punctuation">:</span>
|
|
<span class="token punctuation">}</span>
|
|
|
|
</code></pre>
|
|
</div>
|
|
|
|
<div class="tab__content">
|
|
<pre id="drain_conn_java_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/java-nats-examples/blob/master/src/main/java/io/nats/examples/DrainConn.java#L16-40"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-java"><span class="token class-name">Connection</span> nc <span class="token operator">=</span> <span class="token class-name">Nats</span><span class="token punctuation">.</span><span class="token function">connect</span><span class="token punctuation">(</span><span class="token string">"nats://demo.nats.io:4222"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
|
|
<span class="token comment">// Use a latch to wait for a message to arrive</span>
|
|
<span class="token class-name">CountDownLatch</span> latch <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">CountDownLatch</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
|
|
<span class="token comment">// Create a dispatcher and inline message handler</span>
|
|
<span class="token class-name">Dispatcher</span> d <span class="token operator">=</span> nc<span class="token punctuation">.</span><span class="token function">createDispatcher</span><span class="token punctuation">(</span><span class="token punctuation">(</span>msg<span class="token punctuation">)</span> <span class="token operator">-></span> <span class="token punctuation">{</span>
|
|
<span class="token class-name">String</span> str <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span>msg<span class="token punctuation">.</span><span class="token function">getData</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token class-name">StandardCharsets</span><span class="token punctuation">.</span>UTF_8<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>str<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
latch<span class="token punctuation">.</span><span class="token function">countDown</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
|
|
<span class="token comment">// Subscribe</span>
|
|
d<span class="token punctuation">.</span><span class="token function">subscribe</span><span class="token punctuation">(</span><span class="token string">"updates"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
|
|
<span class="token comment">// Wait for a message to come in</span>
|
|
latch<span class="token punctuation">.</span><span class="token function">await</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
|
|
<span class="token comment">// Drain the connection, which will close it</span>
|
|
<span class="token class-name">CompletableFuture</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Boolean</span><span class="token punctuation">></span></span> drained <span class="token operator">=</span> nc<span class="token punctuation">.</span><span class="token function">drain</span><span class="token punctuation">(</span><span class="token class-name">Duration</span><span class="token punctuation">.</span><span class="token function">ofSeconds</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
|
|
<span class="token comment">// Wait for the drain to complete</span>
|
|
drained<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
</code></pre>
|
|
</div>
|
|
|
|
<div class="tab__content">
|
|
<pre id="drain_conn_js_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/node-nats-examples/blob/master/src/connection_samples.js#L91-111"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-javascript"><span class="token keyword">let</span> nc <span class="token operator">=</span> <span class="token constant">NATS</span><span class="token punctuation">.</span><span class="token function">connect</span><span class="token punctuation">(</span><span class="token punctuation">{</span>url<span class="token punctuation">:</span> <span class="token string">"nats://demo.nats.io:4222"</span><span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token keyword">let</span> inbox <span class="token operator">=</span> <span class="token function">createInbox</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token keyword">let</span> counter <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
|
|
nc<span class="token punctuation">.</span><span class="token function">subscribe</span><span class="token punctuation">(</span>inbox<span class="token punctuation">,</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
|
|
counter<span class="token operator">++</span><span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
|
|
nc<span class="token punctuation">.</span><span class="token function">publish</span><span class="token punctuation">(</span>inbox<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
nc<span class="token punctuation">.</span><span class="token function">drain</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token parameter">err</span><span class="token punctuation">)</span><span class="token operator">=></span> <span class="token punctuation">{</span>
|
|
<span class="token keyword">if</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span> <span class="token punctuation">{</span>
|
|
t<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span>
|
|
t<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'connection is closed:'</span><span class="token punctuation">,</span> nc<span class="token punctuation">.</span>closed<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
t<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'processed'</span><span class="token punctuation">,</span> counter<span class="token punctuation">,</span> <span class="token string">'messages'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
t<span class="token punctuation">.</span><span class="token function">pass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token comment">// the snippet is running as a promise in a test</span>
|
|
<span class="token comment">// and calls resolve to pass the test</span>
|
|
<span class="token function">resolve</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
</code></pre>
|
|
</div>
|
|
|
|
<div class="tab__content">
|
|
<pre id="drain_conn_py_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/asyncio-nats-examples/blob/master/drain_conn.py#L1-34"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-python"><span class="token keyword">import</span> asyncio
|
|
<span class="token keyword">from</span> nats<span class="token punctuation">.</span>aio<span class="token punctuation">.</span>client <span class="token keyword">import</span> Client <span class="token keyword">as</span> NATS
|
|
|
|
<span class="token keyword">async</span> <span class="token keyword">def</span> <span class="token function">example</span><span class="token punctuation">(</span>loop<span class="token punctuation">)</span><span class="token punctuation">:</span>
|
|
nc <span class="token operator">=</span> NATS<span class="token punctuation">(</span><span class="token punctuation">)</span>
|
|
|
|
<span class="token keyword">await</span> nc<span class="token punctuation">.</span>connect<span class="token punctuation">(</span><span class="token string">"nats://127.0.0.1:4222"</span><span class="token punctuation">,</span> loop<span class="token operator">=</span>loop<span class="token punctuation">)</span>
|
|
|
|
<span class="token keyword">async</span> <span class="token keyword">def</span> <span class="token function">handler</span><span class="token punctuation">(</span>msg<span class="token punctuation">)</span><span class="token punctuation">:</span>
|
|
<span class="token keyword">print</span><span class="token punctuation">(</span><span class="token string">"[Received] "</span><span class="token punctuation">,</span> msg<span class="token punctuation">)</span>
|
|
<span class="token keyword">await</span> nc<span class="token punctuation">.</span>publish<span class="token punctuation">(</span>msg<span class="token punctuation">.</span>reply<span class="token punctuation">,</span> <span class="token string">b'I can help'</span><span class="token punctuation">)</span>
|
|
|
|
<span class="token comment"># Can check whether client is in draining state</span>
|
|
<span class="token keyword">if</span> nc<span class="token punctuation">.</span>is_draining<span class="token punctuation">:</span>
|
|
<span class="token keyword">print</span><span class="token punctuation">(</span><span class="token string">"Connection is draining"</span><span class="token punctuation">)</span>
|
|
|
|
<span class="token keyword">await</span> nc<span class="token punctuation">.</span>subscribe<span class="token punctuation">(</span><span class="token string">"help"</span><span class="token punctuation">,</span> <span class="token string">"workers"</span><span class="token punctuation">,</span> cb<span class="token operator">=</span>handler<span class="token punctuation">)</span>
|
|
<span class="token keyword">await</span> nc<span class="token punctuation">.</span>flush<span class="token punctuation">(</span><span class="token punctuation">)</span>
|
|
|
|
requests <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">]</span>
|
|
<span class="token keyword">for</span> i <span class="token keyword">in</span> <span class="token builtin">range</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">10</span><span class="token punctuation">)</span><span class="token punctuation">:</span>
|
|
request <span class="token operator">=</span> nc<span class="token punctuation">.</span>request<span class="token punctuation">(</span><span class="token string">"help"</span><span class="token punctuation">,</span> <span class="token string">b'help!'</span><span class="token punctuation">,</span> timeout<span class="token operator">=</span><span class="token number">1</span><span class="token punctuation">)</span>
|
|
requests<span class="token punctuation">.</span>append<span class="token punctuation">(</span>request<span class="token punctuation">)</span>
|
|
|
|
<span class="token comment"># Wait for all the responses</span>
|
|
responses <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">]</span>
|
|
responses <span class="token operator">=</span> <span class="token keyword">await</span> asyncio<span class="token punctuation">.</span>gather<span class="token punctuation">(</span><span class="token operator">*</span>requests<span class="token punctuation">)</span>
|
|
|
|
<span class="token comment"># Gracefully close the connection.</span>
|
|
<span class="token keyword">await</span> nc<span class="token punctuation">.</span>drain<span class="token punctuation">(</span><span class="token punctuation">)</span>
|
|
|
|
<span class="token keyword">print</span><span class="token punctuation">(</span><span class="token string">"Received {} responses"</span><span class="token punctuation">.</span><span class="token builtin">format</span><span class="token punctuation">(</span><span class="token builtin">len</span><span class="token punctuation">(</span>responses<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
|
|
</code></pre>
|
|
</div>
|
|
|
|
<div class="tab__content">
|
|
<pre id="drain_conn_ruby_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/ruby-nats-examples/blob/master/drain_conn.rb#L3-26"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-ruby"><span class="token constant">NATS</span><span class="token punctuation">.</span>start<span class="token punctuation">(</span>drain_timeout<span class="token punctuation">:</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token keyword">do</span> <span class="token operator">|</span>nc<span class="token operator">|</span>
|
|
<span class="token constant">NATS</span><span class="token punctuation">.</span>subscribe<span class="token punctuation">(</span><span class="token string">'foo'</span><span class="token punctuation">,</span> queue<span class="token punctuation">:</span> <span class="token string">"workers"</span><span class="token punctuation">)</span> <span class="token keyword">do</span> <span class="token operator">|</span>msg<span class="token punctuation">,</span> reply<span class="token punctuation">,</span> sub<span class="token operator">|</span>
|
|
nc<span class="token punctuation">.</span>publish<span class="token punctuation">(</span>reply<span class="token punctuation">,</span> <span class="token string">"ACK:<span class="token interpolation"><span class="token delimiter tag">#{</span>msg<span class="token delimiter tag">}</span></span>"</span><span class="token punctuation">)</span>
|
|
<span class="token keyword">end</span>
|
|
|
|
<span class="token constant">NATS</span><span class="token punctuation">.</span>subscribe<span class="token punctuation">(</span><span class="token string">'bar'</span><span class="token punctuation">,</span> queue<span class="token punctuation">:</span> <span class="token string">"workers"</span><span class="token punctuation">)</span> <span class="token keyword">do</span> <span class="token operator">|</span>msg<span class="token punctuation">,</span> reply<span class="token punctuation">,</span> sub<span class="token operator">|</span>
|
|
nc<span class="token punctuation">.</span>publish<span class="token punctuation">(</span>reply<span class="token punctuation">,</span> <span class="token string">"ACK:<span class="token interpolation"><span class="token delimiter tag">#{</span>msg<span class="token delimiter tag">}</span></span>"</span><span class="token punctuation">)</span>
|
|
<span class="token keyword">end</span>
|
|
|
|
<span class="token constant">NATS</span><span class="token punctuation">.</span>subscribe<span class="token punctuation">(</span><span class="token string">'quux'</span><span class="token punctuation">,</span> queue<span class="token punctuation">:</span> <span class="token string">"workers"</span><span class="token punctuation">)</span> <span class="token keyword">do</span> <span class="token operator">|</span>msg<span class="token punctuation">,</span> reply<span class="token punctuation">,</span> sub<span class="token operator">|</span>
|
|
nc<span class="token punctuation">.</span>publish<span class="token punctuation">(</span>reply<span class="token punctuation">,</span> <span class="token string">"ACK:<span class="token interpolation"><span class="token delimiter tag">#{</span>msg<span class="token delimiter tag">}</span></span>"</span><span class="token punctuation">)</span>
|
|
<span class="token keyword">end</span>
|
|
|
|
<span class="token constant">EM</span><span class="token punctuation">.</span>add_timer<span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">)</span> <span class="token keyword">do</span>
|
|
<span class="token keyword">next</span> <span class="token keyword">if</span> <span class="token constant">NATS</span><span class="token punctuation">.</span>draining<span class="token operator">?</span>
|
|
|
|
<span class="token comment"># Drain gracefully closes the connection.</span>
|
|
<span class="token constant">NATS</span><span class="token punctuation">.</span>drain <span class="token keyword">do</span>
|
|
puts <span class="token string">"Done draining. Connection is closed."</span>
|
|
<span class="token keyword">end</span>
|
|
<span class="token keyword">end</span>
|
|
<span class="token keyword">end</span>
|
|
</code></pre>
|
|
</div>
|
|
|
|
<div class="tab__content">
|
|
<pre id="drain_conn_ts_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/ts-nats-examples/blob/master/src/connection_samples.ts#L73-83"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-javascript"><span class="token keyword">let</span> sub <span class="token operator">=</span> <span class="token keyword">await</span> nc<span class="token punctuation">.</span><span class="token function">subscribe</span><span class="token punctuation">(</span><span class="token string">'updates'</span><span class="token punctuation">,</span> <span class="token punctuation">(</span><span class="token parameter">err<span class="token punctuation">,</span> msg</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
|
|
t<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'worker got message'</span><span class="token punctuation">,</span> msg<span class="token punctuation">.</span>data<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span><span class="token punctuation">,</span> <span class="token punctuation">{</span>queue<span class="token punctuation">:</span> <span class="token string">"workers"</span><span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token comment">// [end drain_sub]</span>
|
|
nc<span class="token punctuation">.</span><span class="token function">flush</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
|
|
<span class="token keyword">await</span> nc<span class="token punctuation">.</span><span class="token function">drain</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token comment">// client must close when the connection drain resolves</span>
|
|
nc<span class="token punctuation">.</span><span class="token function">close</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
</code></pre>
|
|
</div>
|
|
|
|
</div>
|
|
<p>The mechanics of drain for a subscription are simpler:</p>
|
|
<ol>
|
|
<li>Unsubscribe</li>
|
|
<li>Process all cached or inflight messages</li>
|
|
<li>Clean up</li>
|
|
</ol>
|
|
<p>The API for drain can generally be used instead of unsubscribe:</p>
|
|
<div class="tab-wrap">
|
|
|
|
|
|
<input type="radio" id="drain_sub_go" name="drain_sub" class="tab" checked>
|
|
|
|
<label for="drain_sub_go" class="api-lang" data-language="go">Go</label>
|
|
|
|
|
|
<input type="radio" id="drain_sub_java" name="drain_sub" class="tab">
|
|
|
|
<label for="drain_sub_java" class="api-lang" data-language="java">Java</label>
|
|
|
|
|
|
<input type="radio" id="drain_sub_js" name="drain_sub" class="tab">
|
|
|
|
<label for="drain_sub_js" class="api-lang" data-language="js">JavaScript</label>
|
|
|
|
|
|
<input type="radio" id="drain_sub_py" name="drain_sub" class="tab">
|
|
|
|
<label for="drain_sub_py" class="api-lang" data-language="py">Python</label>
|
|
|
|
|
|
<input type="radio" id="drain_sub_ruby" name="drain_sub" class="tab">
|
|
|
|
<label for="drain_sub_ruby" class="api-lang" data-language="ruby">Ruby</label>
|
|
|
|
|
|
<input type="radio" id="drain_sub_ts" name="drain_sub" class="tab">
|
|
|
|
<label for="drain_sub_ts" class="api-lang" data-language="ts">TypeScript</label>
|
|
|
|
|
|
|
|
<div class="tab__content">
|
|
<pre id="drain_sub_go_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/go-nats-examples/blob/master/api-examples/drain_sub/main.go#L13-70"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-go">
|
|
nc<span class="token punctuation">,</span> err <span class="token operator">:=</span> nats<span class="token punctuation">.</span><span class="token function">Connect</span><span class="token punctuation">(</span><span class="token string">"demo.nats.io"</span><span class="token punctuation">)</span>
|
|
<span class="token keyword">if</span> err <span class="token operator">!=</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
|
|
log<span class="token punctuation">.</span><span class="token function">Fatal</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span>
|
|
<span class="token punctuation">}</span>
|
|
<span class="token keyword">defer</span> nc<span class="token punctuation">.</span><span class="token function">Close</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
|
|
|
|
done <span class="token operator">:=</span> sync<span class="token punctuation">.</span>WaitGroup<span class="token punctuation">{</span><span class="token punctuation">}</span>
|
|
done<span class="token punctuation">.</span><span class="token function">Add</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">)</span>
|
|
|
|
count <span class="token operator">:=</span> <span class="token number">0</span>
|
|
errCh <span class="token operator">:=</span> <span class="token function">make</span><span class="token punctuation">(</span><span class="token keyword">chan</span> <span class="token builtin">error</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span>
|
|
|
|
msgAfterDrain <span class="token operator">:=</span> <span class="token string">"not this one"</span>
|
|
|
|
<span class="token comment">// Just to not collide using the demo server with other users.</span>
|
|
subject <span class="token operator">:=</span> nats<span class="token punctuation">.</span><span class="token function">NewInbox</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
|
|
|
|
<span class="token comment">// This callback will process each message slowly</span>
|
|
sub<span class="token punctuation">,</span> err <span class="token operator">:=</span> nc<span class="token punctuation">.</span><span class="token function">Subscribe</span><span class="token punctuation">(</span>subject<span class="token punctuation">,</span> <span class="token keyword">func</span><span class="token punctuation">(</span>m <span class="token operator">*</span>nats<span class="token punctuation">.</span>Msg<span class="token punctuation">)</span> <span class="token punctuation">{</span>
|
|
<span class="token keyword">if</span> <span class="token function">string</span><span class="token punctuation">(</span>m<span class="token punctuation">.</span>Data<span class="token punctuation">)</span> <span class="token operator">==</span> msgAfterDrain <span class="token punctuation">{</span>
|
|
errCh <span class="token operator"><-</span> fmt<span class="token punctuation">.</span><span class="token function">Errorf</span><span class="token punctuation">(</span><span class="token string">"Should not have received this message"</span><span class="token punctuation">)</span>
|
|
<span class="token keyword">return</span>
|
|
<span class="token punctuation">}</span>
|
|
time<span class="token punctuation">.</span><span class="token function">Sleep</span><span class="token punctuation">(</span><span class="token number">100</span> <span class="token operator">*</span> time<span class="token punctuation">.</span>Millisecond<span class="token punctuation">)</span>
|
|
count<span class="token operator">++</span>
|
|
<span class="token keyword">if</span> count <span class="token operator">==</span> <span class="token number">2</span> <span class="token punctuation">{</span>
|
|
done<span class="token punctuation">.</span><span class="token function">Done</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
|
|
<span class="token punctuation">}</span>
|
|
<span class="token punctuation">}</span><span class="token punctuation">)</span>
|
|
|
|
<span class="token comment">// Send 2 messages</span>
|
|
<span class="token keyword">for</span> i <span class="token operator">:=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator"><</span> <span class="token number">2</span><span class="token punctuation">;</span> i<span class="token operator">++</span> <span class="token punctuation">{</span>
|
|
nc<span class="token punctuation">.</span><span class="token function">Publish</span><span class="token punctuation">(</span>subject<span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token function">byte</span><span class="token punctuation">(</span><span class="token string">"hello"</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
|
|
<span class="token punctuation">}</span>
|
|
|
|
<span class="token comment">// Call Drain on the subscription. It unsubscribes but</span>
|
|
<span class="token comment">// wait for all pending messages to be processed.</span>
|
|
<span class="token keyword">if</span> err <span class="token operator">:=</span> sub<span class="token punctuation">.</span><span class="token function">Drain</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> err <span class="token operator">!=</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
|
|
log<span class="token punctuation">.</span><span class="token function">Fatal</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span>
|
|
<span class="token punctuation">}</span>
|
|
|
|
<span class="token comment">// Send one more message, this message should not be received</span>
|
|
nc<span class="token punctuation">.</span><span class="token function">Publish</span><span class="token punctuation">(</span>subject<span class="token punctuation">,</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token function">byte</span><span class="token punctuation">(</span>msgAfterDrain<span class="token punctuation">)</span><span class="token punctuation">)</span>
|
|
|
|
<span class="token comment">// Wait for the subscription to have processed the 2 messages.</span>
|
|
done<span class="token punctuation">.</span><span class="token function">Wait</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
|
|
|
|
<span class="token comment">// Now check that the 3rd message was not received</span>
|
|
<span class="token keyword">select</span> <span class="token punctuation">{</span>
|
|
<span class="token keyword">case</span> e <span class="token operator">:=</span> <span class="token operator"><-</span>errCh<span class="token punctuation">:</span>
|
|
log<span class="token punctuation">.</span><span class="token function">Fatal</span><span class="token punctuation">(</span>e<span class="token punctuation">)</span>
|
|
<span class="token keyword">case</span> <span class="token operator"><-</span>time<span class="token punctuation">.</span><span class="token function">After</span><span class="token punctuation">(</span><span class="token number">200</span> <span class="token operator">*</span> time<span class="token punctuation">.</span>Millisecond<span class="token punctuation">)</span><span class="token punctuation">:</span>
|
|
<span class="token comment">// OK!</span>
|
|
<span class="token punctuation">}</span>
|
|
|
|
</code></pre>
|
|
</div>
|
|
|
|
<div class="tab__content">
|
|
<pre id="drain_sub_java_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/java-nats-examples/blob/master/src/main/java/io/nats/examples/DrainSub.java#L16-43"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-java"><span class="token class-name">Connection</span> nc <span class="token operator">=</span> <span class="token class-name">Nats</span><span class="token punctuation">.</span><span class="token function">connect</span><span class="token punctuation">(</span><span class="token string">"nats://demo.nats.io:4222"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
|
|
<span class="token comment">// Use a latch to wait for a message to arrive</span>
|
|
<span class="token class-name">CountDownLatch</span> latch <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">CountDownLatch</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
|
|
<span class="token comment">// Create a dispatcher and inline message handler</span>
|
|
<span class="token class-name">Dispatcher</span> d <span class="token operator">=</span> nc<span class="token punctuation">.</span><span class="token function">createDispatcher</span><span class="token punctuation">(</span><span class="token punctuation">(</span>msg<span class="token punctuation">)</span> <span class="token operator">-></span> <span class="token punctuation">{</span>
|
|
<span class="token class-name">String</span> str <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">String</span><span class="token punctuation">(</span>msg<span class="token punctuation">.</span><span class="token function">getData</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token class-name">StandardCharsets</span><span class="token punctuation">.</span>UTF_8<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>str<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
latch<span class="token punctuation">.</span><span class="token function">countDown</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
|
|
<span class="token comment">// Subscribe</span>
|
|
d<span class="token punctuation">.</span><span class="token function">subscribe</span><span class="token punctuation">(</span><span class="token string">"updates"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
|
|
<span class="token comment">// Wait for a message to come in</span>
|
|
latch<span class="token punctuation">.</span><span class="token function">await</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
|
|
<span class="token comment">// Messages that have arrived will be processed</span>
|
|
<span class="token class-name">CompletableFuture</span><span class="token generics"><span class="token punctuation"><</span><span class="token class-name">Boolean</span><span class="token punctuation">></span></span> drained <span class="token operator">=</span> d<span class="token punctuation">.</span><span class="token function">drain</span><span class="token punctuation">(</span><span class="token class-name">Duration</span><span class="token punctuation">.</span><span class="token function">ofSeconds</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
|
|
<span class="token comment">// Wait for the drain to complete</span>
|
|
drained<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
|
|
<span class="token comment">// Close the connection</span>
|
|
nc<span class="token punctuation">.</span><span class="token function">close</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
</code></pre>
|
|
</div>
|
|
|
|
<div class="tab__content">
|
|
<pre id="drain_sub_js_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/node-nats-examples/blob/master/src/subscriber_samples.js#L232-252"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-javascript"><span class="token keyword">let</span> nc <span class="token operator">=</span> <span class="token constant">NATS</span><span class="token punctuation">.</span><span class="token function">connect</span><span class="token punctuation">(</span><span class="token punctuation">{</span>url<span class="token punctuation">:</span> <span class="token string">"nats://demo.nats.io:4222"</span><span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token keyword">let</span> inbox <span class="token operator">=</span> <span class="token function">createInbox</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token keyword">let</span> counter <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
|
|
<span class="token keyword">let</span> sid <span class="token operator">=</span> nc<span class="token punctuation">.</span><span class="token function">subscribe</span><span class="token punctuation">(</span>inbox<span class="token punctuation">,</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
|
|
counter<span class="token operator">++</span><span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
|
|
nc<span class="token punctuation">.</span><span class="token function">publish</span><span class="token punctuation">(</span>inbox<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
nc<span class="token punctuation">.</span><span class="token function">drainSubscription</span><span class="token punctuation">(</span>sid<span class="token punctuation">,</span> <span class="token punctuation">(</span><span class="token parameter">err</span><span class="token punctuation">)</span><span class="token operator">=></span> <span class="token punctuation">{</span>
|
|
<span class="token keyword">if</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span> <span class="token punctuation">{</span>
|
|
t<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span>
|
|
t<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'processed'</span><span class="token punctuation">,</span> counter<span class="token punctuation">,</span> <span class="token string">'messages'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
nc<span class="token punctuation">.</span><span class="token function">flush</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
|
|
nc<span class="token punctuation">.</span><span class="token function">close</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
t<span class="token punctuation">.</span><span class="token function">pass</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token function">resolve</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
</code></pre>
|
|
</div>
|
|
|
|
<div class="tab__content">
|
|
<pre id="drain_sub_py_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/asyncio-nats-examples/blob/master/drain_sub.py#L1-24"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-python"><span class="token keyword">import</span> asyncio
|
|
<span class="token keyword">from</span> nats<span class="token punctuation">.</span>aio<span class="token punctuation">.</span>client <span class="token keyword">import</span> Client <span class="token keyword">as</span> NATS
|
|
|
|
<span class="token keyword">async</span> <span class="token keyword">def</span> <span class="token function">example</span><span class="token punctuation">(</span>loop<span class="token punctuation">)</span><span class="token punctuation">:</span>
|
|
nc <span class="token operator">=</span> NATS<span class="token punctuation">(</span><span class="token punctuation">)</span>
|
|
|
|
<span class="token keyword">await</span> nc<span class="token punctuation">.</span>connect<span class="token punctuation">(</span><span class="token string">"nats://127.0.0.1:4222"</span><span class="token punctuation">,</span> loop<span class="token operator">=</span>loop<span class="token punctuation">)</span>
|
|
|
|
<span class="token keyword">async</span> <span class="token keyword">def</span> <span class="token function">handler</span><span class="token punctuation">(</span>msg<span class="token punctuation">)</span><span class="token punctuation">:</span>
|
|
<span class="token keyword">print</span><span class="token punctuation">(</span><span class="token string">"[Received] "</span><span class="token punctuation">,</span> msg<span class="token punctuation">)</span>
|
|
<span class="token keyword">await</span> nc<span class="token punctuation">.</span>publish<span class="token punctuation">(</span>msg<span class="token punctuation">.</span>reply<span class="token punctuation">,</span> <span class="token string">b'I can help'</span><span class="token punctuation">)</span>
|
|
|
|
<span class="token comment"># Can check whether client is in draining state</span>
|
|
<span class="token keyword">if</span> nc<span class="token punctuation">.</span>is_draining<span class="token punctuation">:</span>
|
|
<span class="token keyword">print</span><span class="token punctuation">(</span><span class="token string">"Connection is draining"</span><span class="token punctuation">)</span>
|
|
|
|
sid <span class="token operator">=</span> <span class="token keyword">await</span> nc<span class="token punctuation">.</span>subscribe<span class="token punctuation">(</span><span class="token string">"help"</span><span class="token punctuation">,</span> <span class="token string">"workers"</span><span class="token punctuation">,</span> cb<span class="token operator">=</span>handler<span class="token punctuation">)</span>
|
|
<span class="token keyword">await</span> nc<span class="token punctuation">.</span>flush<span class="token punctuation">(</span><span class="token punctuation">)</span>
|
|
|
|
<span class="token comment"># Gracefully unsubscribe the subscription</span>
|
|
<span class="token keyword">await</span> nc<span class="token punctuation">.</span>drain<span class="token punctuation">(</span>sid<span class="token punctuation">)</span>
|
|
|
|
</code></pre>
|
|
</div>
|
|
|
|
<div class="tab__content">
|
|
<pre id="drain_sub_ruby_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/ruby-nats-examples/blob/master/notapplicable.txt#L9-11"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-ruby"><span class="token comment"># There is currently no API to drain a single subscription, the whole connection can be drained though via NATS.drain</span>
|
|
</code></pre>
|
|
</div>
|
|
|
|
<div class="tab__content">
|
|
<pre id="drain_sub_ts_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/ts-nats-examples/blob/master/src/subscriber_samples.ts#L208-212"><i class="mdi mdi-github-circle" title="View on GitHub"></i></a><a class="toolbar-icons pull-right"><i class="mdi mdi-content-copy js-copy" title="Copy to Clipboard"></i></a><span class="copy-msg pull-right"></span><code class="language-javascript"><span class="token keyword">let</span> sub <span class="token operator">=</span> <span class="token keyword">await</span> nc<span class="token punctuation">.</span><span class="token function">subscribe</span><span class="token punctuation">(</span><span class="token string">'updates'</span><span class="token punctuation">,</span> <span class="token punctuation">(</span><span class="token parameter">err<span class="token punctuation">,</span> msg</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
|
|
t<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'worker got message'</span><span class="token punctuation">,</span> msg<span class="token punctuation">.</span>data<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
<span class="token punctuation">}</span><span class="token punctuation">,</span> <span class="token punctuation">{</span>queue<span class="token punctuation">:</span> <span class="token string">"workers"</span><span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
|
</code></pre>
|
|
</div>
|
|
|
|
</div>
|
|
<p>Because draining can involve messages flowing to the server, for a flush and asynchronous message processing, the timeout for drain should generally be higher than the timeout for a simple message request/reply or similar.</p>
|
|
|
|
|
|
</section>
|
|
|
|
</div>
|
|
<div class="search-results">
|
|
<div class="has-results">
|
|
|
|
<h1 class="search-results-title"><span class='search-results-count'></span> results matching "<span class='search-query'></span>"</h1>
|
|
<ul class="search-results-list"></ul>
|
|
|
|
</div>
|
|
<div class="no-results">
|
|
|
|
<h1 class="search-results-title">No results matching "<span class='search-query'></span>"</h1>
|
|
|
|
</div>
|
|
</div>
|
|
</div>
|
|
|
|
</div>
|
|
</div>
|
|
|
|
</div>
|
|
|
|
|
|
|
|
<a href="queues.html" class="navigation navigation-prev " aria-label="Previous page: Queue Subscriptions">
|
|
<i class="fa fa-angle-left"></i>
|
|
</a>
|
|
|
|
|
|
<a href="structure.html" class="navigation navigation-next " aria-label="Next page: Structured Data">
|
|
<i class="fa fa-angle-right"></i>
|
|
</a>
|
|
|
|
|
|
|
|
</div>
|
|
|
|
<script>
|
|
var gitbook = gitbook || [];
|
|
gitbook.push(function() {
|
|
gitbook.page.hasChanged({"page":{"title":"Draining Messages Before Disconnect","level":"3.5.8","depth":2,"next":{"title":"Structured Data","level":"3.5.9","depth":2,"path":"developer/receiving/structure.md","ref":"developer/receiving/structure.md","articles":[]},"previous":{"title":"Queue Subscriptions","level":"3.5.7","depth":2,"path":"developer/receiving/queues.md","ref":"developer/receiving/queues.md","articles":[]},"dir":"ltr"},"config":{"plugins":["prism","-sharing","-highlight","include-html","toggle-chapters","anchors","edit-link"],"styles":{"website":"styles/website.css","pdf":"styles/pdf.css","epub":"styles/epub.css","mobi":"styles/mobi.css","ebook":"styles/ebook.css","print":"styles/print.css"},"pluginsConfig":{"prism":{"lang":{"ascii":"markup","text":"markup"}},"search":{},"lunr":{"maxIndexSize":1000000,"ignoreSpecialCharacters":false},"include-html":{},"fontsettings":{"theme":"white","family":"sans","size":2},"edit-link":{"label":"","base":"https://github.com/nats-io/docs/edit/master"},"theme-default":{"styles":{"website":"styles/website.css","pdf":"styles/pdf.css","epub":"styles/epub.css","mobi":"styles/mobi.css","ebook":"styles/ebook.css","print":"styles/print.css"},"showLevel":false},"anchors":{},"toggle-chapters":{}},"theme":"default","author":"The NATS Maintainers","pdf":{"pageNumbers":true,"fontSize":12,"fontFamily":"Arial","paperSize":"a4","chapterMark":"pagebreak","pageBreaksBefore":"/","margin":{"right":62,"left":62,"top":56,"bottom":56}},"structure":{"langs":"LANGS.md","readme":"README.md","glossary":"GLOSSARY.md","summary":"SUMMARY.md"},"variables":{},"title":"NATS","gitbook":"*","description":"Administrative, developer and conceptual documentation for the NATS messaging system."},"file":{"path":"developer/receiving/drain.md","mtime":"2019-06-07T14:58:27.245Z","type":"markdown"},"gitbook":{"version":"3.2.3","time":"2019-06-28T23:37:18.980Z"},"basePath":"../..","book":{"language":""}});
|
|
});
|
|
</script>
|
|
</div>
|
|
|
|
<!-- Viz Support -->
|
|
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/viz.js/2.1.2/viz.js"> </script>
|
|
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/viz.js/2.1.2/lite.render.js"> </script>
|
|
|
|
<!-- Site code -->
|
|
<script>
|
|
function flash(elem, text, speed) {
|
|
if (!elem) {
|
|
return;
|
|
}
|
|
var s = elem.style;
|
|
elem.textContent = text;
|
|
s.display = 'block';
|
|
s.opacity = 1;
|
|
(function fade() {
|
|
(s.opacity -= .1) < .1 ? s.display = "none" : setTimeout(fade, speed)
|
|
})();
|
|
}
|
|
|
|
function copyToClipboard(text, el) {
|
|
var copyTest = document.queryCommandSupported('copy');
|
|
var elOriginalText = el.getAttribute('data-original-title');
|
|
|
|
if (copyTest === true) {
|
|
var copyTextArea = document.createElement("textarea");
|
|
copyTextArea.value = text;
|
|
document.body.appendChild(copyTextArea);
|
|
copyTextArea.select();
|
|
try {
|
|
var successful = document.execCommand('copy');
|
|
var msg = successful ? 'Copied!' : 'Whoops, not copied!';
|
|
var parent = el.parentNode.parentNode;
|
|
var msgElem = parent.querySelector(".copy-msg");
|
|
flash(msgElem, msg, 100);
|
|
} catch (err) {
|
|
console.log('Oops, unable to copy', err);
|
|
}
|
|
document.body.removeChild(copyTextArea);
|
|
el.setAttribute('data-original-title', elOriginalText);
|
|
} else {
|
|
// Fallback if browser doesn't support .execCommand('copy')
|
|
window.prompt("Copy to clipboard: Ctrl+C or Command+C, Enter", text);
|
|
}
|
|
}
|
|
|
|
function processGraphVizSections(elements) {
|
|
var elements = document.querySelectorAll("[data-viz]");
|
|
var viz = new Viz();
|
|
Array.prototype.forEach.call(elements, function (x) {
|
|
var engine = x.getAttribute("data-viz");
|
|
var image = viz.renderImageElement(x.innerText, {
|
|
format: "png",
|
|
engine: engine
|
|
}).then(function (element) {
|
|
x.parentNode.insertBefore(element, x);
|
|
});
|
|
});
|
|
|
|
|
|
};
|
|
|
|
function updateLanguageParameter(value) {
|
|
const param = "lang";
|
|
|
|
if (window.location.href.indexOf("?") >= 0) {
|
|
const regExp = new RegExp(param + "(.+?)(&|$)", "g");
|
|
const newUrl = window.location.href.replace(regExp, param + "=" + encodeURIComponent(value) + "$2");
|
|
window.history.pushState("", "", newUrl);
|
|
} else {
|
|
const newUrl = window.location.href + "?" + param + "=" + encodeURIComponent(value);
|
|
window.history.pushState("", "", newUrl);
|
|
}
|
|
}
|
|
|
|
function getLanguageParameter() {
|
|
var match = RegExp('[?&]lang=([^&]*)').exec(window.location.search);
|
|
return match && decodeURIComponent(match[1].replace(/\+/g, ' '));
|
|
}
|
|
|
|
function docReady() {
|
|
window.gitbook.events.bind("page.change", function () {
|
|
pageChanged();
|
|
});
|
|
|
|
var searchInput = document.querySelector('#book-search-input input');
|
|
|
|
if (searchInput) {
|
|
searchInput.addEventListener('keyup', function(event) {
|
|
if (event.keyCode === 13) {
|
|
event.target.blur();
|
|
}
|
|
});
|
|
}
|
|
}
|
|
|
|
function pageChanged() {
|
|
var logos = document.querySelectorAll(".nats");
|
|
if (logos && logos.length == 0) {
|
|
gitbook.toolbar.createButton({
|
|
icon: 'nats',
|
|
label: 'NATS Home Page',
|
|
position: 'right',
|
|
onClick: function () {
|
|
var win = window.open("https://nats.io/", '_blank');
|
|
win.focus();
|
|
}
|
|
});
|
|
}
|
|
|
|
document.querySelectorAll('.js-copy').forEach(elem => {
|
|
elem.addEventListener("click", function () {
|
|
var el = this;
|
|
var parent = this.parentNode.parentNode;
|
|
var code = parent.querySelector('code');
|
|
var text = code.textContent || code.innerText;
|
|
copyToClipboard(text, el);
|
|
})
|
|
});
|
|
|
|
document.querySelectorAll('.api-lang').forEach(elem => {
|
|
elem.addEventListener("click", function () {
|
|
var curLang = sessionStorage.getItem('nats-api-language');
|
|
var lang = this.getAttribute('data-language');
|
|
|
|
// Stop the infinite loop
|
|
if (curLang == lang) {
|
|
return;
|
|
}
|
|
|
|
sessionStorage.setItem('nats-api-language', lang); // So we only do this 1x
|
|
|
|
updateLanguageParameter(lang)
|
|
|
|
document.querySelectorAll('.api-lang[data-language=' + lang + ']').forEach(elem => {
|
|
elem.click();
|
|
});
|
|
})
|
|
});
|
|
|
|
if (sessionStorage) {
|
|
var curLang = sessionStorage.getItem('nats-api-language');
|
|
var queryLang = getLanguageParameter();
|
|
var lang = curLang;
|
|
|
|
if (queryLang) { // query takes precedent
|
|
lang = queryLang
|
|
}
|
|
|
|
if (lang) {
|
|
document.querySelectorAll('.api-lang[data-language=' + lang + ']').forEach(elem => {
|
|
elem.click();
|
|
});
|
|
}
|
|
}
|
|
|
|
setTimeout(function () {
|
|
processGraphVizSections();
|
|
}, 1);
|
|
}
|
|
|
|
|
|
if (document.readyState != 'loading') docReady();
|
|
else if (document.addEventListener) document.addEventListener('DOMContentLoaded', docReady);
|
|
else document.attachEvent('onreadystatechange', function () {
|
|
if (document.readyState == 'complete') docReady();
|
|
});
|
|
</script>
|
|
|
|
<!-- Github Buttons -->
|
|
<script async defer src="https://buttons.github.io/buttons.js"></script>
|
|
|
|
<!-- Styles -->
|
|
<style>
|
|
.nats {
|
|
display: inline-block;
|
|
width: 16px;
|
|
height: 16px;
|
|
background: url(https://nats.io/img/nats-icon-color.svg);
|
|
background-size: 16px 16px;
|
|
background-repeat: no-repeat;
|
|
}
|
|
|
|
div.graphviz {
|
|
background: transparent;
|
|
border: 0;
|
|
padding-top: 15px;
|
|
padding-right: 15px;
|
|
padding-bottom: 25px;
|
|
padding-left: 15px;
|
|
text-align: center;
|
|
}
|
|
|
|
code[data-viz] {
|
|
display: none;
|
|
}
|
|
|
|
.tab-wrap {
|
|
transition: 0.3s box-shadow ease;
|
|
border-radius: 6px;
|
|
max-width: 100%;
|
|
display: flex;
|
|
flex-wrap: wrap;
|
|
position: relative;
|
|
list-style: none;
|
|
background-color: #fff;
|
|
margin: 20px 0;
|
|
/* box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);*/
|
|
}
|
|
|
|
.tab-wrap:hover {
|
|
box-shadow: 0 12px 23px rgba(0, 0, 0, 0.23), 0 10px 10px rgba(0, 0, 0, 0.19);
|
|
}
|
|
|
|
.tab {
|
|
display: none;
|
|
}
|
|
|
|
/* Using scss these would be generated, we have to manually create enough for all tabs, start with 8 */
|
|
.tab:checked:nth-of-type(1)~.tab__content:nth-of-type(1) {
|
|
opacity: 1;
|
|
transition: 0.5s opacity ease-in, 0.8s -webkit-transform ease;
|
|
transition: 0.5s opacity ease-in, 0.8s transform ease;
|
|
transition: 0.5s opacity ease-in, 0.8s transform ease, 0.8s -webkit-transform ease;
|
|
position: relative;
|
|
top: 0;
|
|
z-index: 100;
|
|
-webkit-transform: translateY(0px);
|
|
transform: translateY(0px);
|
|
text-shadow: 0 0 0;
|
|
}
|
|
|
|
.tab:checked:nth-of-type(2)~.tab__content:nth-of-type(2) {
|
|
opacity: 1;
|
|
transition: 0.5s opacity ease-in, 0.8s -webkit-transform ease;
|
|
transition: 0.5s opacity ease-in, 0.8s transform ease;
|
|
transition: 0.5s opacity ease-in, 0.8s transform ease, 0.8s -webkit-transform ease;
|
|
position: relative;
|
|
top: 0;
|
|
z-index: 100;
|
|
-webkit-transform: translateY(0px);
|
|
transform: translateY(0px);
|
|
text-shadow: 0 0 0;
|
|
}
|
|
|
|
.tab:checked:nth-of-type(3)~.tab__content:nth-of-type(3) {
|
|
opacity: 1;
|
|
transition: 0.5s opacity ease-in, 0.8s -webkit-transform ease;
|
|
transition: 0.5s opacity ease-in, 0.8s transform ease;
|
|
transition: 0.5s opacity ease-in, 0.8s transform ease, 0.8s -webkit-transform ease;
|
|
position: relative;
|
|
top: 0;
|
|
z-index: 100;
|
|
-webkit-transform: translateY(0px);
|
|
transform: translateY(0px);
|
|
text-shadow: 0 0 0;
|
|
}
|
|
|
|
.tab:checked:nth-of-type(4)~.tab__content:nth-of-type(4) {
|
|
opacity: 1;
|
|
transition: 0.5s opacity ease-in, 0.8s -webkit-transform ease;
|
|
transition: 0.5s opacity ease-in, 0.8s transform ease;
|
|
transition: 0.5s opacity ease-in, 0.8s transform ease, 0.8s -webkit-transform ease;
|
|
position: relative;
|
|
top: 0;
|
|
z-index: 100;
|
|
-webkit-transform: translateY(0px);
|
|
transform: translateY(0px);
|
|
text-shadow: 0 0 0;
|
|
}
|
|
|
|
.tab:checked:nth-of-type(5)~.tab__content:nth-of-type(5) {
|
|
opacity: 1;
|
|
transition: 0.5s opacity ease-in, 0.8s -webkit-transform ease;
|
|
transition: 0.5s opacity ease-in, 0.8s transform ease;
|
|
transition: 0.5s opacity ease-in, 0.8s transform ease, 0.8s -webkit-transform ease;
|
|
position: relative;
|
|
top: 0;
|
|
z-index: 100;
|
|
-webkit-transform: translateY(0px);
|
|
transform: translateY(0px);
|
|
text-shadow: 0 0 0;
|
|
}
|
|
|
|
.tab:checked:nth-of-type(6)~.tab__content:nth-of-type(6) {
|
|
opacity: 1;
|
|
transition: 0.5s opacity ease-in, 0.8s -webkit-transform ease;
|
|
transition: 0.5s opacity ease-in, 0.8s transform ease;
|
|
transition: 0.5s opacity ease-in, 0.8s transform ease, 0.8s -webkit-transform ease;
|
|
position: relative;
|
|
top: 0;
|
|
z-index: 100;
|
|
-webkit-transform: translateY(0px);
|
|
transform: translateY(0px);
|
|
text-shadow: 0 0 0;
|
|
}
|
|
|
|
.tab:checked:nth-of-type(7)~.tab__content:nth-of-type(7) {
|
|
opacity: 1;
|
|
transition: 0.5s opacity ease-in, 0.8s -webkit-transform ease;
|
|
transition: 0.5s opacity ease-in, 0.8s transform ease;
|
|
transition: 0.5s opacity ease-in, 0.8s transform ease, 0.8s -webkit-transform ease;
|
|
position: relative;
|
|
top: 0;
|
|
z-index: 100;
|
|
-webkit-transform: translateY(0px);
|
|
transform: translateY(0px);
|
|
text-shadow: 0 0 0;
|
|
}
|
|
|
|
.tab:checked:nth-of-type(8)~.tab__content:nth-of-type(8) {
|
|
opacity: 1;
|
|
transition: 0.5s opacity ease-in, 0.8s -webkit-transform ease;
|
|
transition: 0.5s opacity ease-in, 0.8s transform ease;
|
|
transition: 0.5s opacity ease-in, 0.8s transform ease, 0.8s -webkit-transform ease;
|
|
position: relative;
|
|
top: 0;
|
|
z-index: 100;
|
|
-webkit-transform: translateY(0px);
|
|
transform: translateY(0px);
|
|
text-shadow: 0 0 0;
|
|
}
|
|
|
|
.tab:first-of-type:not(:last-of-type)+label {
|
|
border-top-right-radius: 0;
|
|
border-bottom-right-radius: 0;
|
|
}
|
|
|
|
.tab:not(:first-of-type):not(:last-of-type)+label {
|
|
border-radius: 0;
|
|
}
|
|
|
|
.tab:last-of-type:not(:first-of-type)+label {
|
|
border-top-left-radius: 0;
|
|
border-bottom-left-radius: 0;
|
|
}
|
|
|
|
.tab:checked+label {
|
|
background-color: #fff;
|
|
box-shadow: 0 -1px 0 #fff inset;
|
|
cursor: default;
|
|
font-weight: bold;
|
|
border: 1px solid #ddd;
|
|
border-bottom-color: transparent;
|
|
}
|
|
|
|
.tab:checked+label:hover {
|
|
box-shadow: 0 -1px 0 #fff inset;
|
|
background-color: #fff;
|
|
}
|
|
|
|
.tab+label {
|
|
box-shadow: 0 -1px 0 #eee inset;
|
|
border-radius: 6px 6px 0 0;
|
|
cursor: pointer;
|
|
display: block;
|
|
text-decoration: none;
|
|
color: #27aae1;
|
|
flex-grow: 3;
|
|
text-align: center;
|
|
-webkit-user-select: none;
|
|
-moz-user-select: none;
|
|
-ms-user-select: none;
|
|
user-select: none;
|
|
text-align: center;
|
|
transition: 0.3s background-color ease, 0.3s box-shadow ease;
|
|
height: 50px;
|
|
box-sizing: border-box;
|
|
padding: 15px;
|
|
}
|
|
|
|
.tab+label:hover {
|
|
background-color: #f9f9f9;
|
|
box-shadow: 0 1px 0 #f4f4f4 inset;
|
|
}
|
|
|
|
.tab__content {
|
|
padding: 2px 2px;
|
|
background-color: transparent;
|
|
position: absolute;
|
|
width: 100%;
|
|
z-index: -1;
|
|
opacity: 0;
|
|
left: 0;
|
|
-webkit-transform: translateY(-3px);
|
|
transform: translateY(-3px);
|
|
border-radius: 6px;
|
|
}
|
|
|
|
.tab__content pre {
|
|
margin-bottom: 0px !important;
|
|
}
|
|
|
|
.toolbar-icons {
|
|
display: inline-block;
|
|
position: relative;
|
|
padding-left: 4px;
|
|
}
|
|
|
|
a.toolbar-icons {
|
|
text-decoration: none;
|
|
}
|
|
|
|
.toolbar-icons .mdi {
|
|
color: #4183c4;
|
|
}
|
|
|
|
.copy-msg {
|
|
color: #4183c4;
|
|
}
|
|
|
|
.pull-right {
|
|
float: right !important;
|
|
}
|
|
|
|
.pull-left {
|
|
float: left !important;
|
|
}
|
|
</style>
|
|
<!-- Global site tag (gtag.js) - Google Analytics -->
|
|
<script async src="https://www.googletagmanager.com/gtag/js?id=UA-111730698-1"></script>
|
|
<script>
|
|
window.dataLayer = window.dataLayer || [];
|
|
function gtag(){dataLayer.push(arguments);}
|
|
gtag('js', new Date());
|
|
|
|
gtag('config', 'UA-111730698-1');
|
|
</script>
|
|
|
|
|
|
<script src="../../gitbook/gitbook.js"></script>
|
|
<script src="../../gitbook/theme.js"></script>
|
|
|
|
|
|
<script src="../../gitbook/gitbook-plugin-toggle-chapters/toggle.js"></script>
|
|
|
|
|
|
|
|
<script src="../../gitbook/gitbook-plugin-edit-link/plugin.js"></script>
|
|
|
|
|
|
|
|
<script src="../../gitbook/gitbook-plugin-search/search-engine.js"></script>
|
|
|
|
|
|
|
|
<script src="../../gitbook/gitbook-plugin-search/search.js"></script>
|
|
|
|
|
|
|
|
<script src="../../gitbook/gitbook-plugin-lunr/lunr.min.js"></script>
|
|
|
|
|
|
|
|
<script src="../../gitbook/gitbook-plugin-lunr/search-lunr.js"></script>
|
|
|
|
|
|
|
|
<script src="../../gitbook/gitbook-plugin-fontsettings/fontsettings.js"></script>
|
|
|
|
|
|
|
|
</body>
|
|
</html>
|
|
|