activemq-artemis/examples/features/standard/interceptor-client
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readme.html

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    <title>ActiveMQ Artemis JMS Interceptor Example</title>
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     <h1>JMS Interceptor 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 shows you how to implement and configure a simple incoming, server-side interceptor with ActiveMQ Artemis.</p>

     <p>ActiveMQ Artemis allows an application to use an interceptor to hook into the messaging system. All that needs to do is to implement the
     Interceptor interface, as defined below: </p>
     <pre class="prettyprint">
     <code>
         public interface Interceptor
         {
            boolean intercept(Packet packet, RemotingConnection connection) throws ActiveMQException;
         }
     </code>
     </pre>
     <p>Once you have your own interceptor class, add it to the broker.xml, as follows:</p>
     <pre class="prettyprint">
     <code>
        &lt;configuration&gt;
        ...
           &lt;remoting-incoming-interceptors&gt;
              &lt;class-name&gt;org.apache.activemq.artemis.jms.example.SimpleInterceptor&lt;/class-name&gt;
           &lt;/remoting-incoming-interceptors&gt;
        ...
        &lt;/configuration&gt;
     </code>
     </pre>

     <p>With interceptor, you can handle various events in message processing. In this example, a simple interceptor, SimpleInterceptor, is implemented and configured.
     When the example is running, the interceptor will print out each events that are passed in the interceptor. And it will add a string property to the message being
     delivered. You can see that after the message is received, there will be a new string property appears in the received message.</p>

     <p>With our interceptor we always return <code>true</code> from the <code>intercept</code> method. If we were
     to return <code>false</code> that signifies that no more interceptors are to run or the target
     is not to be called. Return <code>false</code> to abort processing of the packet.</p>
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