activemq-artemis

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readme.html

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<html>
  <head>
    <title>ActiveMQ Artemis JMS Clustered Grouping Example</title>
    <link rel="stylesheet" type="text/css" href="../../../common/common.css">
  </head>
  <body>
     <h1>JMS Clustered Grouping Example</h1>

     <pre>To run the example, simply type <b>mvn verify</b> from this directory, <br>or <b>mvn -PnoServer verify</b> if you want to start and create the server manually.</pre>

     <p>This example demonstrates how to ensure strict ordering across a cluster using clustered message grouping</p>
     <p>We create 3 nodes each with a grouping message handler, one with a Local handler and 2 with a Remote handler.</p>
     <p>The local handler acts as an arbitrator for the 2 remote handlers, holding the information on routes and communicating
         the routing info with the remote handlers on the other 2 nodes</p>
     <p>We then send some messages to each node with the same group id set and ensure the same consumer receives all of them</p>
     <p>Here's the relevant snippet from the server configuration that has the local handler</p>
     <pre>
     <code>
       &lt;cluster-connections&gt;
          &lt;cluster-connection name="my-cluster"&gt;
             &lt;address&gt;jms&lt;/address&gt;
             &lt;connector-ref>netty-connector&lt;/connector-ref>
             &lt;retry-interval&gt;500&lt;/retry-interval&gt;
             &lt;use-duplicate-detection&gt;true&lt;/use-duplicate-detection&gt;
             &lt;message-load-balancing&gt;STRICT&lt;/message-load-balancing&gt;
             &lt;max-hops&gt;1&lt;/max-hops&gt;
             &lt;discovery-group-ref discovery-group-name="my-discovery-group"/&gt;
          &lt;/cluster-connection&gt;
       &lt;/cluster-connections&gt;

       &lt;grouping-handler name="my-grouping-handler"&gt;
          &lt;type&gt;LOCAL&lt;/type&gt;
          &lt;address&gt;jms&lt;/address&gt;
          &lt;timeout&gt;5000&lt;/timeout&gt;
       &lt;/grouping-handler&gt;
     </code>
     </pre>

     <p>Here's the relevant snippet from the server configuration that has the remote handlers</p>
     <pre>
     <code>
       &lt;cluster-connections&gt;
          &lt;cluster-connection name="my-cluster"&gt;
             &lt;address&gt;jms&lt;/address&gt;
             &lt;retry-interval&gt;500&lt;/retry-interval&gt;
             &lt;use-duplicate-detection&gt;true&lt;/use-duplicate-detection&gt;
             &lt;message-load-balancing&gt;STRICT&lt;/message-load-balancing&gt;
             &lt;max-hops&gt;1&lt;/max-hops&gt;
             &lt;discovery-group-ref discovery-group-name="my-discovery-group"/&gt;
          &lt;/cluster-connection&gt;
       &lt;/cluster-connections&gt;

       &lt;grouping-handler name="my-grouping-handler"&gt;
          &lt;type&gt;REMOTE&lt;/type&gt;
          &lt;address&gt;jms&lt;/address&gt;
          &lt;timeout&gt;5000&lt;/timeout&gt;
       &lt;/grouping-handler&gt;
     </code>
     </pre>

   </body>
</html>