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nats.io
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What is NATS
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Request-Reply
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Queue Groups
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Acknowledgements
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Sequence Numbers
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Introduction
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Connecting
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Connecting to the Default Server
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Connecting to a Specific Server
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Connecting to a Cluster
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Setting a Connect Timeout
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Ping/Pong Protocol
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Controlling the Client/Server Protocol
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Turning Off Echo'd Messages
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Automatic Reconnections
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</a>
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Disabling Reconnect
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Set the Number of Reconnect Attempts
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Pausing Between Reconnect Attempts
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</a>
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Avoiding the Thundering Herd
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</a>
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Listening for Reconnect Events
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</a>
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Buffering Messages During Reconnect Attempts
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</a>
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</ul>
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<a href="../../developer/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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<a href="../../developer/security/userpass.html">
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Authenticating with a User and Password
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</a>
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<li class="chapter " data-level="3.4.2" data-path="../../developer/security/token.html">
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<a href="../../developer/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="../../developer/security/nkey.html">
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<a href="../../developer/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="../../developer/security/creds.html">
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<a href="../../developer/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="../../developer/security/tls.html">
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<a href="../../developer/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="../../developer/receiving/intro.html">
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<a href="../../developer/receiving/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="../../developer/receiving/sync.html">
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<a href="../../developer/receiving/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="../../developer/receiving/async.html">
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<a href="../../developer/receiving/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 " data-level="3.5.3" data-path="../../developer/receiving/unsubscribing.html">
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<a href="../../developer/receiving/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="../../developer/receiving/unsub_after.html">
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<a href="../../developer/receiving/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="../../developer/receiving/reply.html">
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<a href="../../developer/receiving/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="../../developer/receiving/wildcards.html">
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<a href="../../developer/receiving/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="../../developer/receiving/queues.html">
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<a href="../../developer/receiving/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="../../developer/receiving/drain.html">
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<a href="../../developer/receiving/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="../../developer/receiving/structure.html">
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<a href="../../developer/receiving/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="../../developer/sending/intro.html">
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<a href="../../developer/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="../../developer/sending/replyto.html">
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<a href="../../developer/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="../../developer/sending/request_reply.html">
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<a href="../../developer/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="../../developer/sending/caches.html">
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<a href="../../developer/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="../../developer/sending/structure.html">
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<a href="../../developer/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="../../developer/events/intro.html">
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<a href="../../developer/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="../../developer/events/events.html">
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<a href="../../developer/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="../../developer/events/slow.html">
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<a href="../../developer/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="../../developer/tutorials/intro.html">
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<a href="../../developer/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="../../developer/tutorials/pubsub.html">
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<a href="../../developer/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="../../developer/tutorials/reqreply.html">
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<a href="../../developer/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="../../developer/tutorials/queues.html">
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<a href="../../developer/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="../../developer/tutorials/custom_dialer.html">
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|
<a href="../../developer/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">
|
|
|
|
<a href="../../nats_server/auth_intro.html">
|
|
|
|
|
|
Authentication
|
|
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|
</a>
|
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|
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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">
|
|
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|
<a href="../../nats_server/tokens.html">
|
|
|
|
|
|
Tokens
|
|
|
|
</a>
|
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|
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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>
|
|
|
|
|
|
|
|
</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>
|
|
|
|
|
|
|
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</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>
|
|
|
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|
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</li>
|
|
|
|
|
|
</ul>
|
|
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|
</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>
|
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|
|
</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>
|
|
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|
</li>
|
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|
|
<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>
|
|
|
|
|
|
|
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</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>
|
|
|
|
|
|
|
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</li>
|
|
|
|
|
|
</ul>
|
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|
</li>
|
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|
|
</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>
|
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|
|
</li>
|
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|
|
|
|
<li class="header">NATS Tools</li>
|
|
|
|
|
|
|
|
<li class="chapter " data-level="5.1" data-path="../mkpasswd.html">
|
|
|
|
<a href="../mkpasswd.html">
|
|
|
|
|
|
mkpasswd
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.2" data-path="../nk.html">
|
|
|
|
<a href="../nk.html">
|
|
|
|
|
|
nk
|
|
|
|
</a>
|
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|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.3" data-path="./">
|
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|
|
<a href="./">
|
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|
|
|
|
nsc
|
|
|
|
</a>
|
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|
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|
|
<ul class="articles">
|
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|
|
|
|
<li class="chapter " data-level="5.3.1" data-path="nsc.html">
|
|
|
|
<a href="nsc.html">
|
|
|
|
|
|
Basics
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter active" data-level="5.3.2" data-path="streams.html">
|
|
|
|
<a href="streams.html">
|
|
|
|
|
|
Streams
|
|
|
|
</a>
|
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|
|
|
|
|
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</li>
|
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|
|
<li class="chapter " data-level="5.3.3" data-path="services.html">
|
|
|
|
<a href="services.html">
|
|
|
|
|
|
Services
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.3.4" data-path="signing_keys.html">
|
|
|
|
<a href="signing_keys.html">
|
|
|
|
|
|
Signing Keys
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.3.5" data-path="revocation.html">
|
|
|
|
<a href="revocation.html">
|
|
|
|
|
|
Revocation
|
|
|
|
</a>
|
|
|
|
|
|
|
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</li>
|
|
|
|
<li class="chapter " data-level="5.3.6" data-path="managed.html">
|
|
|
|
<a href="managed.html">
|
|
|
|
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|
Managed Operators
|
|
|
|
</a>
|
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|
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</li>
|
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</ul>
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</li>
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<li class="chapter " data-level="5.4" data-path="../nas/">
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<a href="../nas/">
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nats-account-server
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</a>
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<ul class="articles">
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<li class="chapter " data-level="5.4.1" data-path="../nas/nas_conf.html">
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<a href="../nas/nas_conf.html">
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Basics
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</a>
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</li>
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<li class="chapter " data-level="5.4.2" data-path="../nas/inspecting_jwts.html">
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<a href="../nas/inspecting_jwts.html">
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Inspecting JWTs
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</a>
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</li>
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<li class="chapter " data-level="5.4.3" data-path="../nas/dir_store.html">
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<a href="../nas/dir_store.html">
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Directory Store
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</a>
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</li>
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<li class="chapter " data-level="5.4.4" data-path="../nas/notifications.html">
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<a href="../nas/notifications.html">
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Update Notifications
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</a>
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</li>
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<li class="chapter " data-level="5.4.5" data-path="../nas/mem_resolver.html">
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<a href="../nas/mem_resolver.html">
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Memory Resolver
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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="5.5" data-path="../nats_top/">
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<a href="../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_top/nats-top-tutorial.html">
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<a href="../nats_top/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="../natsbench.html">
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<a href="../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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</li>
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<li class="chapter " data-level="6.2" 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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<li class="chapter " data-level="6.3" 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="6.4" 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="6.4.1" 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="6.4.2" 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="6.4.2.1" 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="6.4.2.2" 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="6.4.2.3" 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="6.4.2.4" 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="6.5" 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="6.6" 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="6.7" 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="6.7.1" 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="6.7.2" 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="6.7.3" 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="6.7.4" 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="6.8" data-path="../../nats_streaming/fault-tolerance/ft.html">
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|
<a href="../../nats_streaming/fault-tolerance/ft.html">
|
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|
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|
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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="6.8.1" 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="6.8.2" 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="6.8.3" 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="6.8.4" data-path="../../nats_streaming/fault-tolerance/failover.html">
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|
<a href="../../nats_streaming/fault-tolerance/failover.html">
|
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|
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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="6.9" 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="chapter " data-level="6.10" data-path="../../nats_streaming/monitoring/monitoring.html">
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|
|
<a href="../../nats_streaming/monitoring/monitoring.html">
|
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|
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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="6.10.1" 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">Developing With NATS Streaming</li>
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<li class="chapter " data-level="7.1" data-path="../../developer/streaming/">
|
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|
<a href="../../developer/streaming/">
|
|
|
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|
|
Introduction
|
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</a>
|
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|
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</li>
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|
<li class="chapter " data-level="7.2" data-path="../../developer/streaming/connecting.html">
|
|
|
|
<a href="../../developer/streaming/connecting.html">
|
|
|
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|
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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="../../developer/streaming/publishing.html">
|
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|
|
<a href="../../developer/streaming/publishing.html">
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|
|
|
|
|
Publishing to a Channel
|
|
|
|
</a>
|
|
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|
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</li>
|
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|
|
<li class="chapter " data-level="7.4" data-path="../../developer/streaming/receiving.html">
|
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|
<a href="../../developer/streaming/receiving.html">
|
|
|
|
|
|
Receiving Messages from a Channel
|
|
|
|
</a>
|
|
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|
|
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</li>
|
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|
|
<li class="chapter " data-level="7.5" data-path="../../developer/streaming/durables.html">
|
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|
|
<a href="../../developer/streaming/durables.html">
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|
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|
|
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Durable Subscriptions
|
|
|
|
</a>
|
|
|
|
|
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</li>
|
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|
|
<li class="chapter " data-level="7.6" data-path="../../developer/streaming/queues.html">
|
|
|
|
<a href="../../developer/streaming/queues.html">
|
|
|
|
|
|
Queue Subscriptions
|
|
|
|
</a>
|
|
|
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|
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</li>
|
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|
|
<li class="chapter " data-level="7.7" data-path="../../developer/streaming/acks.html">
|
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|
|
<a href="../../developer/streaming/acks.html">
|
|
|
|
|
|
Acknowledgements
|
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|
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</a>
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</li>
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|
<li class="chapter " data-level="7.8" data-path="../../developer/streaming/protocol.html">
|
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|
|
<a href="../../developer/streaming/protocol.html">
|
|
|
|
|
|
The Streaming Protocol
|
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|
|
</a>
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</li>
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|
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<li class="header">NATS Streaming Server</li>
|
|
|
|
|
|
|
|
<li class="chapter " data-level="8.1" data-path="../../nats_streaming/gettingstarted/changes.html">
|
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|
|
<a href="../../nats_streaming/gettingstarted/changes.html">
|
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|
|
|
|
Important Changes
|
|
|
|
</a>
|
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|
|
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</li>
|
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|
|
<li class="chapter " data-level="8.2" data-path="../../nats_streaming/gettingstarted/install.html">
|
|
|
|
<a href="../../nats_streaming/gettingstarted/install.html">
|
|
|
|
|
|
Installing
|
|
|
|
</a>
|
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|
|
|
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</li>
|
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|
|
<li class="chapter " data-level="8.3" data-path="../../nats_streaming/gettingstarted/run.html">
|
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|
<a href="../../nats_streaming/gettingstarted/run.html">
|
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|
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Running
|
|
|
|
</a>
|
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</li>
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|
<li class="chapter " data-level="8.4" data-path="../../nats_streaming/configuring/configuring.html">
|
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|
<a href="../../nats_streaming/configuring/configuring.html">
|
|
|
|
|
|
Configuring
|
|
|
|
</a>
|
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|
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|
<ul class="articles">
|
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|
<li class="chapter " data-level="8.4.1" data-path="../../nats_streaming/configuring/cmdline.html">
|
|
|
|
<a href="../../nats_streaming/configuring/cmdline.html">
|
|
|
|
|
|
Command line arguments
|
|
|
|
</a>
|
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|
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</li>
|
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|
<li class="chapter " data-level="8.4.2" data-path="../../nats_streaming/configuring/cfgfile.html">
|
|
|
|
<a href="../../nats_streaming/configuring/cfgfile.html">
|
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|
|
|
|
Configuration file
|
|
|
|
</a>
|
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|
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</li>
|
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|
<li class="chapter " data-level="8.4.3" data-path="../../nats_streaming/configuring/storelimits.html">
|
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|
<a href="../../nats_streaming/configuring/storelimits.html">
|
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|
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Store Limits
|
|
|
|
</a>
|
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<ul class="articles">
|
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|
<li class="chapter " data-level="8.4.3.1" data-path="../../nats_streaming/configuring/storelimits.html">
|
|
|
|
<a href="../../nats_streaming/configuring/storelimits.html#limits-inheritance">
|
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|
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Limits inheritance
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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="8.4.4" data-path="../../nats_streaming/configuring/persistence.html">
|
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|
<a href="../../nats_streaming/configuring/persistence.html">
|
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Persistence
|
|
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|
</a>
|
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<ul class="articles">
|
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<li class="chapter " data-level="8.4.4.1" data-path="../../nats_streaming/configuring/filestore.html">
|
|
|
|
<a href="../../nats_streaming/configuring/filestore.html">
|
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|
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File Store
|
|
|
|
</a>
|
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|
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<ul class="articles">
|
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<li class="chapter " data-level="8.4.4.1.1" data-path="../../nats_streaming/configuring/filestore.html">
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<a href="../../nats_streaming/configuring/filestore.html#options">
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Options
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</a>
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<li class="chapter " data-level="8.4.4.1.2" data-path="../../nats_streaming/configuring/filestore.html">
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<a href="../../nats_streaming/configuring/filestore.html#recovery-errors">
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Recovery Errors
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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="8.4.4.2" data-path="../../nats_streaming/configuring/sqlstore.html">
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<a href="../../nats_streaming/configuring/sqlstore.html">
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SQL Store
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</a>
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<ul class="articles">
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<li class="chapter " data-level="8.4.4.2.1" data-path="../../nats_streaming/configuring/sqlstore.html">
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<a href="../../nats_streaming/configuring/sqlstore.html#read-and-write-timeouts">
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Read and Write Timeouts
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</a>
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</li>
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<li class="chapter " data-level="8.4.4.2.2" data-path="../../nats_streaming/configuring/sqlstore.html">
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<a href="../../nats_streaming/configuring/sqlstore.html#options">
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Options
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</a>
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</ul>
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</li>
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<li class="chapter " data-level="8.4.5" data-path="../../nats_streaming/configuring/tls.html">
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<a href="../../nats_streaming/configuring/tls.html">
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Securing
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</a>
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<ul class="articles">
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<li class="chapter " data-level="8.4.5.1" data-path="../../nats_streaming/configuring/tls.html">
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<a href="../../nats_streaming/configuring/tls.html#authenticating-users">
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Authenticating Users
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</a>
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</li>
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<li class="chapter " data-level="8.4.5.2" data-path="../../nats_streaming/configuring/tls.html">
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<a href="../../nats_streaming/configuring/tls.html#using-tls">
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TLS
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</a>
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</li>
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</ul>
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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 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 class="chapter " data-level="8.7" data-path="../../developer/streaming/embedding.html">
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<a href="../../developer/streaming/embedding.html">
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Embedding NATS Streaming Server
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</a>
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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 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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Client Protocol
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Developing a Client
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</a>
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<a href="../../nats_protocol/nats-server-protocol.html">
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NATS Cluster Protocol
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<!-- Title -->
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<h1>
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<i class="fa fa-circle-o-notch fa-spin"></i>
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<a href="../.." >Streams</a>
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</h1>
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<section class="normal markdown-section">
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<h1 id="streams"><a name="streams" class="plugin-anchor" href="#streams"><i class="fa fa-link" aria-hidden="true"></i></a>Streams</h1>
|
|
<p>To share messages you publish with other accounts, you have to <em>Export</em> a <em>Stream</em>. <em>Exports</em> are associated with the account performing the export and advertised in exporting account’s JWT.</p>
|
|
<h3 id="adding-a-public-stream-export"><a name="adding-a-public-stream-export" class="plugin-anchor" href="#adding-a-public-stream-export"><i class="fa fa-link" aria-hidden="true"></i></a>Adding a Public Stream Export</h3>
|
|
<p>To add a stream to your account:</p>
|
|
<pre class="language-"><code class="lang-text">> nsc add export --name "abc" --subject "a.b.c.>"
|
|
Success! - added public stream export "abc"
|
|
</code></pre>
|
|
<blockquote>
|
|
<p>Note that we have exported stream with a subject that contains a wildcard. Any subject that matches the pattern will be exported.</p>
|
|
</blockquote>
|
|
<p>To check that the export is how you intended:</p>
|
|
<pre class="language-"><code class="lang-text">> nsc describe account
|
|
╭────────────────────────────────────────────────────╮
|
|
│ Account Details │
|
|
├──────────────────────────┬─────────────────────────┤
|
|
│ Name │ TestAccount │
|
|
│ Account ID │ AC7PO3MREV26 │
|
|
│ Issuer ID │ OAYI3YUZSWDN │
|
|
│ Issued │ 2019-04-29 14:20:13 UTC │
|
|
│ Expires │ │
|
|
├──────────────────────────┼─────────────────────────┤
|
|
│ Max Connections │ Unlimited │
|
|
│ Max Data │ Unlimited │
|
|
│ Max Exports │ Unlimited │
|
|
│ Max Imports │ Unlimited │
|
|
│ Max Msg Payload │ Unlimited │
|
|
│ Max Subscriptions │ Unlimited │
|
|
│ Exports Allows Wildcards │ True │
|
|
├──────────────────────────┼─────────────────────────┤
|
|
│ Imports │ None │
|
|
╰──────────────────────────┴─────────────────────────╯
|
|
|
|
╭───────────────────────────────────╮
|
|
│ Exports │
|
|
├──────┬─────────┬─────────┬────────┤
|
|
│ Name │ Type │ Subject │ Public │
|
|
├──────┼─────────┼─────────┼────────┤
|
|
│ abc │ Stream │ a.b.c.> │ Yes │
|
|
╰──────┴─────────┴─────────┴────────╯
|
|
</code></pre>
|
|
<p>Messages this account publishes on <code>a.b.c.></code> will be forwarded to all accounts that import this stream.</p>
|
|
<h3 id="importing-a-stream"><a name="importing-a-stream" class="plugin-anchor" href="#importing-a-stream"><i class="fa fa-link" aria-hidden="true"></i></a>Importing a Stream</h3>
|
|
<p>Importing a stream enables you to receive messages that are published by a different <em>Account</em>. To import a Stream, you have to create an <em>Import</em>. To create an <em>Import</em> you need to know:</p>
|
|
<ul>
|
|
<li>The exporting account’s public key</li>
|
|
<li>The subject where the stream is published</li>
|
|
<li>You can map the stream’s subject to a different subject</li>
|
|
<li>Self-imports are not valid; you can only import streams from other accounts.</li>
|
|
</ul>
|
|
<p>To learn how to inspect a JWT from an account server, <a href="../nas/inspecting_jwts.html">check this article</a>.</p>
|
|
<p>With the required information, we can add an import to the public stream.</p>
|
|
<pre class="language-"><code class="lang-text">> nsc add import --src-account AC7PO3MREV26U3LFZFP5BN3HAI32X3PKLBRVMPAETLEHWPQEUG7EJY4H --remote-subject "a.b.c.>" --local-subject "abc.>"
|
|
Success! - added stream import "a.b.c.>"
|
|
</code></pre>
|
|
<blockquote>
|
|
<p>Note we did fancy things here: The remote stream publishes messages as <code>a.b.c.></code>, but we changed the prefix to be something else in the importing account’s subject space. We changed it to <code>abc.></code>. Subscribers in our account can listen to <code>abc.></code> to get the messages. The message will be delivered as <code>abc.a.b.c.></code>.</p>
|
|
</blockquote>
|
|
<p>And verifying it:</p>
|
|
<pre class="language-"><code class="lang-text">> nsc describe account
|
|
╭────────────────────────────────────────────────────╮
|
|
│ Account Details │
|
|
├──────────────────────────┬─────────────────────────┤
|
|
│ Name │ AccountB │
|
|
│ Account ID │ AAL5Q2B3SMSO │
|
|
│ Issuer ID │ OAYI3YUZSWDN │
|
|
│ Issued │ 2019-04-25 21:33:58 UTC │
|
|
│ Expires │ │
|
|
├──────────────────────────┼─────────────────────────┤
|
|
│ Max Connections │ Unlimited │
|
|
│ Max Data │ Unlimited │
|
|
│ Max Exports │ Unlimited │
|
|
│ Max Imports │ Unlimited │
|
|
│ Max Msg Payload │ Unlimited │
|
|
│ Max Subscriptions │ Unlimited │
|
|
│ Exports Allows Wildcards │ True │
|
|
├──────────────────────────┼─────────────────────────┤
|
|
│ Exports │ None │
|
|
╰──────────────────────────┴─────────────────────────╯
|
|
|
|
╭────────────────────────────────────────────────────────────────────╮
|
|
│ Imports │
|
|
├───────┬────────┬─────────┬───────┬─────────┬──────────────┬────────┤
|
|
│ Name │ Type │ Remote │ Local │ Expires │ From Account │ Public │
|
|
├───────┼────────┼─────────┼───────┼─────────┼──────────────┼────────┤
|
|
│ abc.> │ Stream │ a.b.c.> │ abc.> │ │ AC7PO3MREV26 │ Yes │
|
|
╰───────┴────────┴─────────┴───────┴─────────┴──────────────┴────────╯
|
|
</code></pre>
|
|
<h2 id="securing-streams"><a name="securing-streams" class="plugin-anchor" href="#securing-streams"><i class="fa fa-link" aria-hidden="true"></i></a>Securing Streams</h2>
|
|
<p>If you want to create a stream that is only accessible to accounts you designate you can create a <em>private</em> stream. The export will be visible in your account, but <em>subscribing</em> accounts will require an authorization token that must be created by you and generated specifically for the subscribing account.</p>
|
|
<p>The authorization token is simply a JWT signed by your account where you authorize the client account to import your export.</p>
|
|
<h3 id="creating-a-private-stream-export"><a name="creating-a-private-stream-export" class="plugin-anchor" href="#creating-a-private-stream-export"><i class="fa fa-link" aria-hidden="true"></i></a>Creating a Private Stream Export</h3>
|
|
<pre class="language-"><code class="lang-text">> nsc add export --name pabc --subject "a.b.c.>" --private
|
|
Success! - added private stream export "pabc"
|
|
</code></pre>
|
|
<p>Like before we defined an export, but this time we added the <code>--private</code> flag.</p>
|
|
<pre class="language-"><code class="lang-text">> nsc describe account
|
|
╭────────────────────────────────────────────────────╮
|
|
│ Account Details │
|
|
├──────────────────────────┬─────────────────────────┤
|
|
│ Name │ TestAccount │
|
|
│ Account ID │ AC7PO3MREV26 │
|
|
│ Issuer ID │ OAYI3YUZSWDN │
|
|
│ Issued │ 2019-04-25 21:51:02 UTC │
|
|
│ Expires │ │
|
|
├──────────────────────────┼─────────────────────────┤
|
|
│ Max Connections │ Unlimited │
|
|
│ Max Data │ Unlimited │
|
|
│ Max Exports │ Unlimited │
|
|
│ Max Imports │ Unlimited │
|
|
│ Max Msg Payload │ Unlimited │
|
|
│ Max Subscriptions │ Unlimited │
|
|
│ Exports Allows Wildcards │ True │
|
|
├──────────────────────────┼─────────────────────────┤
|
|
│ Imports │ None │
|
|
╰──────────────────────────┴─────────────────────────╯
|
|
|
|
╭──────────────────────────────────╮
|
|
│ Exports │
|
|
├──────┬────────┬─────────┬────────┤
|
|
│ Name │ Type │ Subject │ Public │
|
|
├──────┼────────┼─────────┼────────┤
|
|
│ pabc │ Stream │ a.b.c.> │ No │
|
|
╰──────┴────────┴─────────┴────────╯
|
|
</code></pre>
|
|
<h3 id="generating-an-activation-token"><a name="generating-an-activation-token" class="plugin-anchor" href="#generating-an-activation-token"><i class="fa fa-link" aria-hidden="true"></i></a>Generating an Activation Token</h3>
|
|
<p>For a foreign account to <em>import</em> a private stream, you have to generate an activation token. The activation token in addition to granting permissions to the account, it also allows you to subset the exported stream’s subject.</p>
|
|
<p>Let’s create an account and user for our stream client:</p>
|
|
<pre class="language-"><code class="lang-text">> nsc add account --name AccountB
|
|
Generated account key - private key stored “~/.nkeys/Test/accounts/AccountB/AccountB"
|
|
Success! - added account "AccountB"
|
|
|
|
> nsc add user --name userb
|
|
Generated user key - private key stored "~/.nkeys/Test/accounts/AccountB/users/userb”
|
|
Generated user creds file "~/.nkeys/Test/accounts/ACcountB/users/userb.creds"
|
|
Success! - added user “userb” to “AccountB”
|
|
</code></pre>
|
|
<p>To generate a token, you’ll need to know the public key of the account importing the stream.</p>
|
|
<pre class="language-"><code class="lang-text">> nsc generate activation -o /tmp/activation.jwt --target-account AAL5Q2B3SMSO5AS3APJFUNAIKUCEQJPAQ76XEBTVOCQCXXGKP3YMGGN4 —subject a.b.c.d
|
|
generated "pabc" activation for account "AAL5Q2B3SMSO5AS3APJFUNAIKUCEQJPAQ76XEBTVOCQCXXGKP3YMGGN4".
|
|
JTI is "VNT3Y32I5FNTEHIVL6PINEJNNZ6Z2BGGEJ2QWNA3TPQ4A4KBRGHQ"
|
|
</code></pre>
|
|
<p>In the above invocation, we generated an activation redirecting the output to <code>/tmp/activation.jwt</code>. The exporting account exported <code>a.b.c.></code>, but on the activation token will only grant permission to <code>a.b.c.d</code> to the target account.</p>
|
|
<p>For completeness, the contents of the JWT file look like this:</p>
|
|
<pre class="language-"><code class="lang-text">> cat /tmp/activation.jwt
|
|
-----BEGIN NATS ACTIVATION JWT-----
|
|
eyJ0eXAiOiJqd3QiLCJhbGciOiJlZDI1NTE5In0.eyJqdGkiOiJWTlQzWTMySTVGTlRFSElWTDZQSU5FSk5OWjZaMkJHR0VKMlFXTkEzVFBRNEE0S0JSR0hRIiwiaWF0IjoxNTU2MjI5NDk0LCJpc3MiOiJBQzdQTzNNUkVWMjZVM0xGWkZQNUJOM0hBSTMyWDNQS0xCUlZNUEFFVExFSFdQUUVVRzdFSlk0SCIsIm5hbWUiOiJhLmIuYy5kIiwic3ViIjoiQUFMNVEyQjNTTVNPNUFTM0FQSkZVTkFJS1VDRVFKUEFRNzZYRUJUVk9DUUNYWEdLUDNZTUdHTjQiLCJ0eXBlIjoiYWN0aXZhdGlvbiIsIm5hdHMiOnsic3ViamVjdCI6ImEuYi5jLmQiLCJ0eXBlIjoic3RyZWFtIn19.eA0W-mcxFXyIpEk0MUgaLjj7t5jxEHTar7MNY5IYcJ7NHlDoHU5IFog2LlFW_hpTCFA4qa989vqECsiTuBuCAA
|
|
------END NATS ACTIVATION JWT------
|
|
</code></pre>
|
|
<p>When decoded it looks like this:</p>
|
|
<pre class="language-"><code class="lang-text">> nsc describe jwt -f /tmp/activation.jwt
|
|
╭───────────────────────────────────────────╮
|
|
│ Activation │
|
|
├─────────────────┬─────────────────────────┤
|
|
│ Import Type │ Stream │
|
|
│ Import Subject │ a.b.c.d │
|
|
│ Account ID │ AAL5Q2B3SMSO │
|
|
│ Issuer ID │ AC7PO3MREV26 │
|
|
│ Issued │ 2019-04-25 21:58:14 UTC │
|
|
│ Expires │ │
|
|
├─────────────────┼─────────────────────────┤
|
|
│ Max Messages │ Unlimited │
|
|
│ Max Msg Payload │ Unlimited │
|
|
│ Network Src │ Any │
|
|
│ Time │ Any │
|
|
╰─────────────────┴─────────────────────────╯
|
|
</code></pre>
|
|
<p>The token can be shared directly with the client account. </p>
|
|
<blockquote>
|
|
<p>If you manage many tokens for many accounts, you may want to host activation tokens on a web server and share the URL with the account. The benefit to the hosted approach is that any updates to the token would be available to the importing account whenever their account is updated, provided the URL you host them in is stable.</p>
|
|
</blockquote>
|
|
<h2 id="importing-a-private-stream"><a name="importing-a-private-stream" class="plugin-anchor" href="#importing-a-private-stream"><i class="fa fa-link" aria-hidden="true"></i></a>Importing a Private Stream</h2>
|
|
<p>Importing a private stream is more natural than a public one as the activation token given to you already has all the necessary details. Note that the token can be an actual file path or a remote URL.</p>
|
|
<pre class="language-"><code class="lang-text">> nsc add import --token /tmp/activation.jwt
|
|
Success! - added stream import "a.b.c.d"
|
|
</code></pre>
|
|
<pre class="language-"><code class="lang-text">> nsc describe account
|
|
nsc describe account
|
|
╭────────────────────────────────────────────────────╮
|
|
│ Account Details │
|
|
├──────────────────────────┬─────────────────────────┤
|
|
│ Name │ AccountB │
|
|
│ Account ID │ AAL5Q2B3SMSO │
|
|
│ Issuer ID │ OAYI3YUZSWDN │
|
|
│ Issued │ 2019-04-25 22:04:29 UTC │
|
|
│ Expires │ │
|
|
├──────────────────────────┼─────────────────────────┤
|
|
│ Max Connections │ Unlimited │
|
|
│ Max Data │ Unlimited │
|
|
│ Max Exports │ Unlimited │
|
|
│ Max Imports │ Unlimited │
|
|
│ Max Msg Payload │ Unlimited │
|
|
│ Max Subscriptions │ Unlimited │
|
|
│ Exports Allows Wildcards │ True │
|
|
├──────────────────────────┼─────────────────────────┤
|
|
│ Exports │ None │
|
|
╰──────────────────────────┴─────────────────────────╯
|
|
|
|
╭────────────────────────────────────────────────────────────────────────╮
|
|
│ Imports │
|
|
├─────────┬────────┬─────────┬─────────┬─────────┬──────────────┬────────┤
|
|
│ Name │ Type │ Remote │ Local │ Expires │ From Account │ Public │
|
|
├─────────┼────────┼─────────┼─────────┼─────────┼──────────────┼────────┤
|
|
│ a.b.c.d │ Stream │ a.b.c.d │ a.b.c.d │ │ AC7PO3MREV26 │ No │
|
|
╰─────────┴────────┴─────────┴─────────┴─────────┴──────────────┴────────╯
|
|
</code></pre>
|
|
<h3 id="testing-the-private-stream"><a name="testing-the-private-stream" class="plugin-anchor" href="#testing-the-private-stream"><i class="fa fa-link" aria-hidden="true"></i></a>Testing the Private Stream</h3>
|
|
<p>Start the <code>nats-account-server</code>:</p>
|
|
<pre class="language-"><code class="lang-text"> > nats-account-server -nsc ~/.nsc/nats/Test
|
|
</code></pre>
|
|
<p>Create a config for the nats server <code>server.conf</code>:</p>
|
|
<pre class="language-"><code class="lang-text">operator: /Users/synadia/.nsc/nats/Test/Test.jwt
|
|
resolver: URL(http://localhost:9090/jwt/v1/accounts/)
|
|
</code></pre>
|
|
<p>Start the <code>nats-server</code>:</p>
|
|
<pre class="language-"><code class="lang-text">> nats-server -c server.conf
|
|
</code></pre>
|
|
<p>Start the subscriber for the client account:</p>
|
|
<pre class="language-"><code class="lang-text">> nats-sub -creds ~/.nkeys/Test/accounts/AccountB/users/userb.creds ">"
|
|
Listening on [>]
|
|
</code></pre>
|
|
<p>Publish messages to the stream:</p>
|
|
<pre class="language-"><code class="lang-text"># Client won’t get this one since it only has permission
|
|
# for messages ‘a.b.c.d’
|
|
> nats-pub -creds ~/.nkeys/Test/accounts/TestAccount/users/TestUser.creds a.b.c.a "hello"
|
|
Published [a.b.c.a] : 'hello'
|
|
|
|
> nats-pub -creds ~/.nkeys/Test/accounts/TestAccount/users/TestUser.creds a.b.c.d "hello"
|
|
Published [a.b.c.d] : 'hello'
|
|
</code></pre>
|
|
<p>The subscriber as expected prints a message on the stream that it was allowed to receive:</p>
|
|
<pre class="language-"><code class="lang-text">[#1] Received on [a.b.c.d.a.b.c.d]: 'hello'
|
|
</code></pre>
|
|
|
|
|
|
</section>
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var gitbook = gitbook || [];
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gitbook.push(function() {
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gitbook.page.hasChanged({"page":{"title":"Streams","level":"5.3.2","depth":2,"next":{"title":"Services","level":"5.3.3","depth":2,"path":"nats_tools/nsc/services.md","ref":"nats_tools/nsc/services.md","articles":[]},"previous":{"title":"Basics","level":"5.3.1","depth":2,"path":"nats_tools/nsc/nsc.md","ref":"nats_tools/nsc/nsc.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":"edit","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":"nats_tools/nsc/streams.md","mtime":"2019-09-23T22:49:18.496Z","type":"markdown"},"gitbook":{"version":"3.2.3","time":"2019-09-27T21:13:11.925Z"},"basePath":"../..","book":{"language":""}});
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});
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</script>
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</div>
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<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/viz.js/2.1.2/viz.js"> </script>
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<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/viz.js/2.1.2/lite.render.js"> </script>
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<script>
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function flash(elem, text, speed) {
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if (!elem) {
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return;
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}
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var s = elem.style;
|
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elem.textContent = text;
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s.display = 'block';
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s.opacity = 1;
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(function fade() {
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(s.opacity -= .1) < .1 ? s.display = "none" : setTimeout(fade, speed)
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var copyTest = document.queryCommandSupported('copy');
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if (copyTest === true) {
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var copyTextArea = document.createElement("textarea");
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copyTextArea.value = text;
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document.body.appendChild(copyTextArea);
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copyTextArea.select();
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try {
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var successful = document.execCommand('copy');
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var msg = successful ? 'Copied!' : 'Whoops, not copied!';
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var parent = el.parentNode.parentNode;
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var msgElem = parent.querySelector(".copy-msg");
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flash(msgElem, msg, 100);
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} catch (err) {
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|
console.log('Oops, unable to copy', err);
|
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}
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|
document.body.removeChild(copyTextArea);
|
|
el.setAttribute('data-original-title', elOriginalText);
|
|
} else {
|
|
// Fallback if browser doesn't support .execCommand('copy')
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|
window.prompt("Copy to clipboard: Ctrl+C or Command+C, Enter", text);
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}
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}
|
|
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function processGraphVizSections(elements) {
|
|
var elements = document.querySelectorAll("[data-viz]");
|
|
var viz = new Viz();
|
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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;
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var code = parent.querySelector('code');
|
|
var text = code.textContent || code.innerText;
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|
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();
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});
|
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}
|
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}
|
|
|
|
setTimeout(function () {
|
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processGraphVizSections();
|
|
}, 1);
|
|
}
|
|
|
|
|
|
if (document.readyState != 'loading') docReady();
|
|
else if (document.addEventListener) document.addEventListener('DOMContentLoaded', docReady);
|
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else document.attachEvent('onreadystatechange', function () {
|
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if (document.readyState == 'complete') docReady();
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});
|
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</script>
|
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|
|
<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;
|
|
}
|
|
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|
code[data-viz] {
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display: none;
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}
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.tab-wrap {
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|
transition: 0.3s box-shadow ease;
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|
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);*/
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}
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box-shadow: 0 12px 23px rgba(0, 0, 0, 0.23), 0 10px 10px rgba(0, 0, 0, 0.19);
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}
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.tab {
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display: none;
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}
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.tab:checked:nth-of-type(1)~.tab__content:nth-of-type(1) {
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|
opacity: 1;
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transition: 0.5s opacity ease-in, 0.8s -webkit-transform ease;
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|
transition: 0.5s opacity ease-in, 0.8s transform ease;
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|
transition: 0.5s opacity ease-in, 0.8s transform ease, 0.8s -webkit-transform ease;
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|
position: relative;
|
|
top: 0;
|
|
z-index: 100;
|
|
-webkit-transform: translateY(0px);
|
|
transform: translateY(0px);
|
|
text-shadow: 0 0 0;
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|
}
|
|
|
|
.tab:checked:nth-of-type(2)~.tab__content:nth-of-type(2) {
|
|
opacity: 1;
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|
transition: 0.5s opacity ease-in, 0.8s -webkit-transform ease;
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|
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) {
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|
opacity: 1;
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|
transition: 0.5s opacity ease-in, 0.8s -webkit-transform ease;
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|
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;
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|
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;
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|
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;
|
|
}
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|
|
|
.pull-left {
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|
float: left !important;
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|
}
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</style>
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window.dataLayer = window.dataLayer || [];
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function gtag(){dataLayer.push(arguments);}
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gtag('js', new Date());
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gtag('config', 'UA-111730698-1');
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</script>
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<script src="../../gitbook/gitbook.js"></script>
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<script src="../../gitbook/gitbook-plugin-edit-link/plugin.js"></script>
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<script src="../../gitbook/gitbook-plugin-search/search-engine.js"></script>
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<script src="../../gitbook/gitbook-plugin-search/search.js"></script>
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<script src="../../gitbook/gitbook-plugin-lunr/lunr.min.js"></script>
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<script src="../../gitbook/gitbook-plugin-lunr/search-lunr.js"></script>
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