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Introduction
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What's New in 2.0
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What is NATS
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Subject-Based Messaging
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Publish-Subscribe
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Request-Reply
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Queue Groups
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Acknowledgements
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<li class="chapter " data-level="2.7" data-path="../concepts/seq_num.html">
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<a href="../concepts/seq_num.html">
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Sequence Numbers
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</a>
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<li class="header">Developing With NATS</li>
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<li class="chapter " data-level="3.1" data-path="../">
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<a href="../">
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Introduction
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<li class="chapter " data-level="3.2" data-path="../connecting/intro.html">
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Connecting
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<ul class="articles">
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Connecting to the Default Server
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</a>
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Connecting to a Specific Server
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Connecting to a Cluster
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</a>
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<li class="chapter " data-level="3.2.4" data-path="../connecting/connect_timeout.html">
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<a href="../connecting/connect_timeout.html">
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Setting a Connect Timeout
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</a>
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<li class="chapter " data-level="3.2.5" data-path="../connecting/pingpong.html">
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<a href="../connecting/pingpong.html">
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Ping/Pong Protocol
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</a>
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Controlling the Client/Server Protocol
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</a>
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<a href="../connecting/noecho.html">
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Turning Off Echo'd Messages
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</a>
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</li>
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</ul>
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<li class="chapter " data-level="3.3" data-path="../reconnect/intro.html">
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<a href="../reconnect/intro.html">
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Automatic Reconnections
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</a>
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<ul class="articles">
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<a href="../reconnect/disable.html">
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Disabling Reconnect
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</a>
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</li>
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<li class="chapter " data-level="3.3.2" data-path="../reconnect/max.html">
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<a href="../reconnect/max.html">
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Set the Number of Reconnect Attempts
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</a>
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</li>
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<li class="chapter " data-level="3.3.3" data-path="../reconnect/wait.html">
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<a href="../reconnect/wait.html">
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Pausing Between Reconnect Attempts
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</a>
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</li>
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<li class="chapter " data-level="3.3.4" data-path="../reconnect/random.html">
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<a href="../reconnect/random.html">
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Avoiding the Thundering Herd
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</a>
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</li>
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<li class="chapter " data-level="3.3.5" data-path="../reconnect/events.html">
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<a href="../reconnect/events.html">
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Listening for Reconnect Events
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</a>
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</li>
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<li class="chapter " data-level="3.3.6" data-path="../reconnect/buffer.html">
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<a href="../reconnect/buffer.html">
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Buffering Messages During Reconnect Attempts
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</a>
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</li>
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</ul>
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<li class="chapter " data-level="3.4" data-path="../security/intro.html">
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<a href="../security/intro.html">
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Securing Connections
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</a>
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<ul class="articles">
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<li class="chapter " data-level="3.4.1" data-path="../security/userpass.html">
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<a href="../security/userpass.html">
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Authenticating with a User and Password
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</a>
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</li>
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<li class="chapter " data-level="3.4.2" data-path="../security/token.html">
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<a href="../security/token.html">
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Authenticating with a Token
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</a>
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</li>
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<li class="chapter " data-level="3.4.3" data-path="../security/nkey.html">
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<a href="../security/nkey.html">
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Authenticating with an NKey
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</a>
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</li>
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<li class="chapter " data-level="3.4.4" data-path="../security/creds.html">
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<a href="../security/creds.html">
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Authenticating with a Credentials File
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</a>
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</li>
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<li class="chapter " data-level="3.4.5" data-path="../security/tls.html">
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<a href="../security/tls.html">
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Encrypting Connections with TLS
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="3.5" data-path="intro.html">
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<a href="intro.html">
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Receiving Messages
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</a>
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<ul class="articles">
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<li class="chapter " data-level="3.5.1" data-path="sync.html">
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<a href="sync.html">
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Synchronous Subscriptions
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</a>
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</li>
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<li class="chapter " data-level="3.5.2" data-path="async.html">
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<a href="async.html">
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Asynchronous Subscriptions
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</a>
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</li>
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<li class="chapter active" data-level="3.5.3" data-path="unsubscribing.html">
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<a href="unsubscribing.html">
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Unsubscribing
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</a>
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</li>
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<li class="chapter " data-level="3.5.4" data-path="unsub_after.html">
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<a href="unsub_after.html">
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Unsubscribing After N Messages
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</a>
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</li>
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<li class="chapter " data-level="3.5.5" data-path="reply.html">
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<a href="reply.html">
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Replying to a Message
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</a>
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</li>
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<li class="chapter " data-level="3.5.6" data-path="wildcards.html">
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<a href="wildcards.html">
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Wildcard Subscriptions
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</a>
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</li>
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<li class="chapter " data-level="3.5.7" data-path="queues.html">
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<a href="queues.html">
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Queue Subscriptions
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</a>
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</li>
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<li class="chapter " data-level="3.5.8" data-path="drain.html">
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<a href="drain.html">
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Draining Messages Before Disconnect
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</a>
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</li>
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<li class="chapter " data-level="3.5.9" data-path="structure.html">
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<a href="structure.html">
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Structured Data
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="3.6" data-path="../sending/intro.html">
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<a href="../sending/intro.html">
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Sending Messages
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</a>
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<ul class="articles">
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<li class="chapter " data-level="3.6.1" data-path="../sending/replyto.html">
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<a href="../sending/replyto.html">
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Including a Reply Subject
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</a>
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</li>
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<li class="chapter " data-level="3.6.2" data-path="../sending/request_reply.html">
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<a href="../sending/request_reply.html">
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Request-Reply Semantics
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</a>
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</li>
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<li class="chapter " data-level="3.6.3" data-path="../sending/caches.html">
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<a href="../sending/caches.html">
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Caches, Flush and Ping
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</a>
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</li>
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<li class="chapter " data-level="3.6.4" data-path="../sending/structure.html">
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<a href="../sending/structure.html">
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Sending Structured Data
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="3.7" data-path="../events/intro.html">
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<a href="../events/intro.html">
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Monitoring the Connection
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</a>
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<ul class="articles">
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<li class="chapter " data-level="3.7.1" data-path="../events/events.html">
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<a href="../events/events.html">
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Listen for Connection Events
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</a>
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</li>
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<li class="chapter " data-level="3.7.2" data-path="../events/slow.html">
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<a href="../events/slow.html">
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Slow Consumers
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="3.8" data-path="../tutorials/intro.html">
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<a href="../tutorials/intro.html">
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Tutorials
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</a>
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<ul class="articles">
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<li class="chapter " data-level="3.8.1" data-path="../tutorials/pubsub.html">
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<a href="../tutorials/pubsub.html">
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Explore NATS Pub/Sub
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</a>
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</li>
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<li class="chapter " data-level="3.8.2" data-path="../tutorials/reqreply.html">
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<a href="../tutorials/reqreply.html">
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Explore NATS Request/Reply
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</a>
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</li>
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<li class="chapter " data-level="3.8.3" data-path="../tutorials/queues.html">
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<a href="../tutorials/queues.html">
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Explore NATS Queueing
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</a>
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</li>
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<li class="chapter " data-level="3.8.4" data-path="../tutorials/custom_dialer.html">
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<a href="../tutorials/custom_dialer.html">
|
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Advanced Connect and Custom Dialer in Go
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</a>
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</li>
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</ul>
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</li>
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<li class="header">NATS Server</li>
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<li class="chapter " data-level="4.1" data-path="../../nats_server/installation.html">
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<a href="../../nats_server/installation.html">
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Installing
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</a>
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</li>
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<li class="chapter " data-level="4.2" data-path="../../nats_server/running.html">
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<a href="../../nats_server/running.html">
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Running
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</a>
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<ul class="articles">
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<li class="chapter " data-level="4.2.1" data-path="../../nats_server/windows_srv.html">
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<a href="../../nats_server/windows_srv.html">
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Window Service
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="4.3" data-path="../../nats_server/clients.html">
|
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<a href="../../nats_server/clients.html">
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|
Clients
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</a>
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</li>
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<li class="chapter " data-level="4.4" data-path="../../nats_server/flags.html">
|
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|
<a href="../../nats_server/flags.html">
|
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|
Flags
|
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</a>
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</li>
|
|
|
|
<li class="chapter " data-level="4.5" data-path="../../nats_server/configuration.html">
|
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<a href="../../nats_server/configuration.html">
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|
Configuration
|
|
|
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</a>
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|
<ul class="articles">
|
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|
|
<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>
|
|
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<ul class="articles">
|
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|
<li class="chapter " data-level="4.5.1.1" data-path="../../nats_server/tls.html">
|
|
|
|
<a href="../../nats_server/tls.html">
|
|
|
|
|
|
Enabling TLS
|
|
|
|
</a>
|
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|
|
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</li>
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|
|
|
<li class="chapter " data-level="4.5.1.2" data-path="../../nats_server/auth_intro.html">
|
|
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|
<a href="../../nats_server/auth_intro.html">
|
|
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|
|
|
Authentication
|
|
|
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</a>
|
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<ul class="articles">
|
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|
|
<li class="chapter " data-level="4.5.1.2.1" data-path="../../nats_server/tokens.html">
|
|
|
|
<a href="../../nats_server/tokens.html">
|
|
|
|
|
|
Tokens
|
|
|
|
</a>
|
|
|
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|
|
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</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>
|
|
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|
|
|
|
</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>
|
|
|
|
|
|
|
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</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/tutorial.html">
|
|
|
|
<a href="../../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/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/">
|
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<a href="../../nats_tools/nats_top/">
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nats-top
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</a>
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<ul class="articles">
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<li class="chapter " data-level="5.5.1" data-path="../../nats_tools/nats_top/tutorial.html">
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<a href="../../nats_tools/nats_top/tutorial.html">
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Tutorial
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="5.6" data-path="../../nats_tools/natsbench.html">
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<a href="../../nats_tools/natsbench.html">
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nats-bench
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</a>
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</li>
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<li class="header">NATS Streaming Concepts</li>
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<li class="chapter " data-level="6.1" data-path="../../nats_streaming/intro.html">
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<a href="../../nats_streaming/intro.html">
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Introduction
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</a>
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<ul class="articles">
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<li class="chapter " data-level="6.1.1" data-path="../../nats_streaming/relation-to-nats.html">
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<a href="../../nats_streaming/relation-to-nats.html">
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Relation to NATS
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="6.2" data-path="../../nats_streaming/client-connections.html">
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<a href="../../nats_streaming/client-connections.html">
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Client Connections
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</a>
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</li>
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<li class="chapter " data-level="6.3" data-path="../../nats_streaming/channels/channels.html">
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<a href="../../nats_streaming/channels/channels.html">
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Channels
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</a>
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<ul class="articles">
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<li class="chapter " data-level="6.3.1" data-path="../../nats_streaming/channels/message-log.html">
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<a href="../../nats_streaming/channels/message-log.html">
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Message Log
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</a>
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</li>
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<li class="chapter " data-level="6.3.2" data-path="../../nats_streaming/channels/subscriptions/subscriptions.html">
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<a href="../../nats_streaming/channels/subscriptions/subscriptions.html">
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Subscriptions
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</a>
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<ul class="articles">
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<li class="chapter " data-level="6.3.2.1" data-path="../../nats_streaming/channels/subscriptions/regular.html">
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<a href="../../nats_streaming/channels/subscriptions/regular.html">
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Regular
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</a>
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</li>
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<li class="chapter " data-level="6.3.2.2" data-path="../../nats_streaming/channels/subscriptions/durable.html">
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<a href="../../nats_streaming/channels/subscriptions/durable.html">
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Durable
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</a>
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</li>
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<li class="chapter " data-level="6.3.2.3" data-path="../../nats_streaming/channels/subscriptions/queue-group.html">
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<a href="../../nats_streaming/channels/subscriptions/queue-group.html">
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Queue Group
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</a>
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</li>
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<li class="chapter " data-level="6.3.2.4" data-path="../../nats_streaming/channels/subscriptions/redelivery.html">
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<a href="../../nats_streaming/channels/subscriptions/redelivery.html">
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Redelivery
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</a>
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</li>
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</ul>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="6.4" data-path="../../nats_streaming/store-interface.html">
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<a href="../../nats_streaming/store-interface.html">
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Store Interface
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</a>
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</li>
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<li class="chapter " data-level="6.5" data-path="../../nats_streaming/store-encryption.html">
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<a href="../../nats_streaming/store-encryption.html">
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Store Encryption
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</a>
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</li>
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<li class="chapter " data-level="6.6" data-path="../../nats_streaming/clustering/clustering.html">
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<a href="../../nats_streaming/clustering/clustering.html">
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Clustering
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</a>
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<ul class="articles">
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<li class="chapter " data-level="6.6.1" data-path="../../nats_streaming/clustering/supported-stores.html">
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<a href="../../nats_streaming/clustering/supported-stores.html">
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Supported Stores
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</a>
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</li>
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<li class="chapter " data-level="6.6.2" data-path="../../nats_streaming/clustering/configuration.html">
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<a href="../../nats_streaming/clustering/configuration.html">
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Configuration
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</a>
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</li>
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<li class="chapter " data-level="6.6.3" data-path="../../nats_streaming/clustering/auto-configuration.html">
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<a href="../../nats_streaming/clustering/auto-configuration.html">
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Auto Configuration
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</a>
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</li>
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<li class="chapter " data-level="6.6.4" data-path="../../nats_streaming/clustering/containers.html">
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<a href="../../nats_streaming/clustering/containers.html">
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Containers
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="6.7" data-path="../../nats_streaming/fault-tolerance/ft.html">
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<a href="../../nats_streaming/fault-tolerance/ft.html">
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Fault Tolerance
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</a>
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<ul class="articles">
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<li class="chapter " data-level="6.7.1" data-path="../../nats_streaming/fault-tolerance/active-server.html">
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<a href="../../nats_streaming/fault-tolerance/active-server.html">
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Active Server
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</a>
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</li>
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<li class="chapter " data-level="6.7.2" data-path="../../nats_streaming/fault-tolerance/standby-server.html">
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<a href="../../nats_streaming/fault-tolerance/standby-server.html">
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Standby Servers
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</a>
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</li>
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<li class="chapter " data-level="6.7.3" data-path="../../nats_streaming/fault-tolerance/shared-state.html">
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<a href="../../nats_streaming/fault-tolerance/shared-state.html">
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Shared State
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</a>
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</li>
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<li class="chapter " data-level="6.7.4" data-path="../../nats_streaming/fault-tolerance/failover.html">
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<a href="../../nats_streaming/fault-tolerance/failover.html">
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Failover
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="6.8" data-path="../../nats_streaming/partitioning.html">
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<a href="../../nats_streaming/partitioning.html">
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Partitioning
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</a>
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</li>
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<li class="header">Developing With NATS Streaming</li>
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<li class="chapter " data-level="7.1" data-path="../streaming/">
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<a href="../streaming/">
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Introduction
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</a>
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</li>
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<li class="chapter " data-level="7.2" data-path="../streaming/connecting.html">
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<a href="../streaming/connecting.html">
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Connecting to NATS Streaming
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</a>
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</li>
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<li class="chapter " data-level="7.3" data-path="../streaming/publishing.html">
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<a href="../streaming/publishing.html">
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Publishing to a Channel
|
|
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</a>
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</li>
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<li class="chapter " data-level="7.4" data-path="../streaming/receiving.html">
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<a href="../streaming/receiving.html">
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Receiving Messages from a Channel
|
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</a>
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</li>
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<li class="chapter " data-level="7.5" data-path="../streaming/durables.html">
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<a href="../streaming/durables.html">
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Durable Subscriptions
|
|
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</a>
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</li>
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<li class="chapter " data-level="7.6" data-path="../streaming/queues.html">
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<a href="../streaming/queues.html">
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Queue Subscriptions
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</a>
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</li>
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<li class="chapter " data-level="7.7" data-path="../streaming/acks.html">
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<a href="../streaming/acks.html">
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Acknowledgements
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</a>
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</li>
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<li class="chapter " data-level="7.8" data-path="../streaming/protocol.html">
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<a href="../streaming/protocol.html">
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The Streaming Protocol
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</a>
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</li>
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<li class="header">NATS Streaming Server</li>
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<li class="chapter " data-level="8.1" data-path="../../nats_streaming/gettingstarted/install.html">
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<a href="../../nats_streaming/gettingstarted/install.html">
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Installing
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</a>
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</li>
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<li class="chapter " data-level="8.2" data-path="../../nats_streaming/gettingstarted/run.html">
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<a href="../../nats_streaming/gettingstarted/run.html">
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Running
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</a>
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</li>
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<li class="chapter " data-level="8.3" data-path="../../nats_streaming/gettingstarted/configuring.html">
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<a href="../../nats_streaming/gettingstarted/configuring.html">
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Configuring
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</a>
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</li>
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<li class="chapter " data-level="8.4" data-path="../../nats_streaming/gettingstarted/tls.html">
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<a href="../../nats_streaming/gettingstarted/tls.html">
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Securing
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</a>
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</li>
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<li class="chapter " data-level="8.5" data-path="../../nats_streaming/gettingstarted/process-signaling.html">
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<a href="../../nats_streaming/gettingstarted/process-signaling.html">
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Process Signaling
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</a>
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</li>
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<li class="chapter " data-level="8.6" data-path="../../nats_streaming/gettingstarted/windows-service.html">
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<a href="../../nats_streaming/gettingstarted/windows-service.html">
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Windows Service
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</a>
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</li>
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<li class="chapter " data-level="8.7" data-path="../streaming/embedding.html">
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<a href="../streaming/embedding.html">
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Embedding NATS Streaming Server
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</a>
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</li>
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<li class="chapter " data-level="8.8" data-path="../../nats_streaming/swarm.html">
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<a href="../../nats_streaming/swarm.html">
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Docker Swarm
|
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</a>
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</li>
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<li class="chapter " data-level="8.9" data-path="../../nats_streaming/monitoring/monitoring.html">
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<a href="../../nats_streaming/monitoring/monitoring.html">
|
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Monitoring
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</a>
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<ul class="articles">
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<li class="chapter " data-level="8.9.1" data-path="../../nats_streaming/monitoring/enabling.html">
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<a href="../../nats_streaming/monitoring/enabling.html">
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Enabling
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</a>
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</li>
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<li class="chapter " data-level="8.9.2" data-path="../../nats_streaming/monitoring/endpoints.html">
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<a href="../../nats_streaming/monitoring/endpoints.html">
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Endpoints
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</a>
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</li>
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</ul>
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</li>
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<li class="header">NATS Protocol</li>
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<li class="chapter " data-level="9.1" data-path="../../nats_protocol/nats-protocol-demo.html">
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<a href="../../nats_protocol/nats-protocol-demo.html">
|
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Protocol Demo
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</a>
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</li>
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<li class="chapter " data-level="9.2" data-path="../../nats_protocol/nats-protocol.html">
|
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<a href="../../nats_protocol/nats-protocol.html">
|
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Client Protocol
|
|
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</a>
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<ul class="articles">
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<li class="chapter " data-level="9.2.1" data-path="../../nats_protocol/nats-client-dev.html">
|
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<a href="../../nats_protocol/nats-client-dev.html">
|
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Developing a Client
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="9.3" data-path="../../nats_protocol/nats-server-protocol.html">
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<a href="../../nats_protocol/nats-server-protocol.html">
|
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NATS Cluster Protocol
|
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</a>
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</li>
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<li class="divider"></li>
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<li>
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<a href="https://www.gitbook.com" target="blank" class="gitbook-link">
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Published with GitBook
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<section class="normal markdown-section">
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<h1 id="unsubscribing"><a name="unsubscribing" class="plugin-anchor" href="#unsubscribing"><i class="fa fa-link" aria-hidden="true"></i></a>Unsubscribing</h1>
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<p>The client libraries provide a means to unsubscribe a previous subscription request.</p>
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<p>This process requires an interaction with the server, so for an asynchronous subscription there may be a small window of time where a message comes through as the unsubscribe is processed by the library. Ignoring that slight edge case, the client library will clean up any outstanding messages and tell the server that the subscription is no longer used.</p>
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<div class="tab-wrap">
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<input type="radio" id="unsubscribe_go" name="unsubscribe" class="tab" checked>
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<label for="unsubscribe_go" class="api-lang" data-language="go">Go</label>
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<input type="radio" id="unsubscribe_java" name="unsubscribe" class="tab">
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<label for="unsubscribe_java" class="api-lang" data-language="java">Java</label>
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<input type="radio" id="unsubscribe_js" name="unsubscribe" class="tab">
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<label for="unsubscribe_js" class="api-lang" data-language="js">JavaScript</label>
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<input type="radio" id="unsubscribe_py" name="unsubscribe" class="tab">
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<label for="unsubscribe_py" class="api-lang" data-language="py">Python</label>
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<input type="radio" id="unsubscribe_ruby" name="unsubscribe" class="tab">
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<label for="unsubscribe_ruby" class="api-lang" data-language="ruby">Ruby</label>
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<input type="radio" id="unsubscribe_ts" name="unsubscribe" class="tab">
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<label for="unsubscribe_ts" class="api-lang" data-language="ts">TypeScript</label>
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<div class="tab__content">
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<pre id="unsubscribe_go_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/go-nats-examples/blob/master/api-examples/unsubscribe/main.go#L10-37"><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>
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<span class="token keyword">if</span> err <span class="token operator">!=</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
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log<span class="token punctuation">.</span><span class="token function">Fatal</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span>
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<span class="token punctuation">}</span>
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<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>
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<span class="token comment">// Sync Subscription</span>
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sub<span class="token punctuation">,</span> err <span class="token operator">:=</span> nc<span class="token punctuation">.</span><span class="token function">SubscribeSync</span><span class="token punctuation">(</span><span class="token string">"updates"</span><span class="token punctuation">)</span>
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<span class="token keyword">if</span> err <span class="token operator">!=</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
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log<span class="token punctuation">.</span><span class="token function">Fatal</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span>
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<span class="token punctuation">}</span>
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<span class="token keyword">if</span> err <span class="token operator">:=</span> sub<span class="token punctuation">.</span><span class="token function">Unsubscribe</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>
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log<span class="token punctuation">.</span><span class="token function">Fatal</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span>
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<span class="token punctuation">}</span>
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<span class="token comment">// Async Subscription</span>
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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><span class="token string">"updates"</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>Msg<span class="token punctuation">)</span> <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">)</span>
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<span class="token keyword">if</span> err <span class="token operator">!=</span> <span class="token boolean">nil</span> <span class="token punctuation">{</span>
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log<span class="token punctuation">.</span><span class="token function">Fatal</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span>
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<span class="token punctuation">}</span>
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<span class="token keyword">if</span> err <span class="token operator">:=</span> sub<span class="token punctuation">.</span><span class="token function">Unsubscribe</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>
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log<span class="token punctuation">.</span><span class="token function">Fatal</span><span class="token punctuation">(</span>err<span class="token punctuation">)</span>
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<span class="token punctuation">}</span>
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<span class="token comment">// Close the connection</span>
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nc<span class="token punctuation">.</span><span class="token function">Close</span><span class="token punctuation">(</span><span class="token punctuation">)</span>
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</code></pre>
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</div>
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<div class="tab__content">
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<pre id="unsubscribe_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/Unsubscribe.java#L14-31"><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>
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<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>
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<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>
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<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>
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<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token comment">// Sync Subscription</span>
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<span class="token class-name">Subscription</span> sub <span class="token operator">=</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>
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sub<span class="token punctuation">.</span><span class="token function">unsubscribe</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token comment">// Async Subscription</span>
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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>
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d<span class="token punctuation">.</span><span class="token function">unsubscribe</span><span class="token punctuation">(</span><span class="token string">"updates"</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token comment">// Close the connection</span>
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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>
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</code></pre>
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</div>
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<div class="tab__content">
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<pre id="unsubscribe_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#L54-65"><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 comment">// set up a subscription to process a request</span>
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<span class="token keyword">let</span> sub <span class="token operator">=</span> nc<span class="token punctuation">.</span><span class="token function">subscribe</span><span class="token punctuation">(</span><span class="token constant">NATS</span><span class="token punctuation">.</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 punctuation">(</span><span class="token parameter">msg<span class="token punctuation">,</span> reply</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">{</span>
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<span class="token keyword">if</span> <span class="token punctuation">(</span>msg<span class="token punctuation">.</span>reply<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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nc<span class="token punctuation">.</span><span class="token function">publish</span><span class="token punctuation">(</span>reply<span class="token punctuation">,</span> <span class="token keyword">new</span> <span class="token class-name">Date</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">toLocaleTimeString</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token comment">// without arguments the subscription will cancel when the server receives it</span>
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<span class="token comment">// you can also specify how many messages are expected by the subscription</span>
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nc<span class="token punctuation">.</span><span class="token function">unsubscribe</span><span class="token punctuation">(</span>sub<span class="token punctuation">)</span><span class="token punctuation">;</span>
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</code></pre>
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</div>
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<div class="tab__content">
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<pre id="unsubscribe_py_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/asyncio-nats-examples/blob/master/unsubscribe.py#L6-26"><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-python">nc <span class="token operator">=</span> NATS<span class="token punctuation">(</span><span class="token punctuation">)</span>
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<span class="token keyword">await</span> nc<span class="token punctuation">.</span>connect<span class="token punctuation">(</span>servers<span class="token operator">=</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>
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future <span class="token operator">=</span> asyncio<span class="token punctuation">.</span>Future<span class="token punctuation">(</span><span class="token punctuation">)</span>
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<span class="token keyword">async</span> <span class="token keyword">def</span> <span class="token function">cb</span><span class="token punctuation">(</span>msg<span class="token punctuation">)</span><span class="token punctuation">:</span>
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<span class="token keyword">nonlocal</span> future
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future<span class="token punctuation">.</span>set_result<span class="token punctuation">(</span>msg<span class="token punctuation">)</span>
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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">"updates"</span><span class="token punctuation">,</span> cb<span class="token operator">=</span>cb<span class="token punctuation">)</span>
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<span class="token keyword">await</span> nc<span class="token punctuation">.</span>publish<span class="token punctuation">(</span><span class="token string">"updates"</span><span class="token punctuation">,</span> <span class="token string">b'All is Well'</span><span class="token punctuation">)</span>
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<span class="token comment"># Remove interest in subject</span>
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<span class="token keyword">await</span> nc<span class="token punctuation">.</span>unsubscribe<span class="token punctuation">(</span>sid<span class="token punctuation">)</span>
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<span class="token comment"># Won't be received...</span>
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<span class="token keyword">await</span> nc<span class="token punctuation">.</span>publish<span class="token punctuation">(</span><span class="token string">"updates"</span><span class="token punctuation">,</span> <span class="token string">b'...'</span><span class="token punctuation">)</span>
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</code></pre>
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</div>
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<div class="tab__content">
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<pre id="unsubscribe_ruby_content"><a class="toolbar-icons pull-right" target="_blank" href="https://github.com/nats-io/ruby-nats-examples/blob/master/unsubscribe.rb#L1-27"><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 keyword">require</span> <span class="token string">'nats/client'</span>
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<span class="token keyword">require</span> <span class="token string">'fiber'</span>
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<span class="token constant">NATS</span><span class="token punctuation">.</span>start<span class="token punctuation">(</span>servers<span class="token punctuation">:</span><span class="token punctuation">[</span><span class="token string">"nats://127.0.0.1:4222"</span><span class="token punctuation">]</span><span class="token punctuation">)</span> <span class="token keyword">do</span> <span class="token operator">|</span>nc<span class="token operator">|</span>
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<span class="token constant">Fiber</span><span class="token punctuation">.</span><span class="token keyword">new</span> <span class="token class-name">do</span>
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f <span class="token operator">=</span> <span class="token constant">Fiber</span><span class="token punctuation">.</span>current
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sid <span class="token operator">=</span> nc<span class="token punctuation">.</span>subscribe<span class="token punctuation">(</span><span class="token string">"time"</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 operator">|</span>
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f<span class="token punctuation">.</span>resume <span class="token builtin">Time</span><span class="token punctuation">.</span>now
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<span class="token keyword">end</span>
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nc<span class="token punctuation">.</span>publish<span class="token punctuation">(</span><span class="token string">"time"</span><span class="token punctuation">,</span> <span class="token string">'What is the time?'</span><span class="token punctuation">,</span> <span class="token constant">NATS</span><span class="token punctuation">.</span>create_inbox<span class="token punctuation">)</span>
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<span class="token comment"># Use the response</span>
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msg <span class="token operator">=</span> <span class="token constant">Fiber</span><span class="token punctuation">.</span><span class="token keyword">yield</span>
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puts <span class="token string">"Reply: <span class="token interpolation"><span class="token delimiter tag">#{</span>msg<span class="token delimiter tag">}</span></span>"</span>
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nc<span class="token punctuation">.</span>unsubscribe<span class="token punctuation">(</span>sid<span class="token punctuation">)</span>
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<span class="token comment"># Won't be received</span>
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nc<span class="token punctuation">.</span>publish<span class="token punctuation">(</span><span class="token string">"time"</span><span class="token punctuation">,</span> <span class="token string">'What is the time?'</span><span class="token punctuation">,</span> <span class="token constant">NATS</span><span class="token punctuation">.</span>create_inbox<span class="token punctuation">)</span>
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<span class="token keyword">end</span><span class="token punctuation">.</span>resume
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<span class="token keyword">end</span>
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</code></pre>
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</div>
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<div class="tab__content">
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<pre id="unsubscribe_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#L51-64"><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-javascript"><span class="token comment">// set up a subscription to process a request</span>
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<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 function">createInbox</span><span class="token punctuation">(</span><span class="token punctuation">)</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>
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<span class="token keyword">if</span> <span class="token punctuation">(</span>msg<span class="token punctuation">.</span>reply<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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nc<span class="token punctuation">.</span><span class="token function">publish</span><span class="token punctuation">(</span>msg<span class="token punctuation">.</span>reply<span class="token punctuation">,</span> <span class="token keyword">new</span> <span class="token class-name">Date</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">toLocaleTimeString</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span>
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t<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'got a request for the time, but no reply subject was set.'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token comment">// without arguments the subscription will cancel when the server receives it</span>
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<span class="token comment">// you can also specify how many messages are expected by the subscription</span>
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sub<span class="token punctuation">.</span><span class="token function">unsubscribe</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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</code></pre>
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