72 lines
2.9 KiB
HTML
72 lines
2.9 KiB
HTML
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<html>
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<head>
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<title>ActiveMQ Artemis JMS Interceptor Example</title>
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<link rel="stylesheet" type="text/css" href="../../../common/common.css" />
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<link rel="stylesheet" type="text/css" href="../../../common/prettify.css" />
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<script type="text/javascript" src="../../../common/prettify.js"></script>
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</head>
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<body onload="prettyPrint()">
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<h1>MQTT Interceptor Example</h1>
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<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>
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<p>This example shows you how to implement and configure a simple incoming, server-side MQTT interceptor with ActiveMQ Artemis.</p>
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<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
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Interceptor interface, as defined below: </p>
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<pre class="prettyprint">
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<code>
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public interface Interceptor
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{
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boolean intercept(final MqttMessage mqttMessage, RemotingConnection connection);
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}
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</code>
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</pre>
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<p>Once you have your own interceptor class, add it to the broker.xml, as follows:</p>
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<pre class="prettyprint">
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<code>
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<configuration>
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...
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<remoting-incoming-interceptors>
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<class-name>org.apache.activemq.artemis.mqtt.example.SimpleMQTTInterceptor</class-name>
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</remoting-incoming-interceptors>
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...
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</configuration>
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</code>
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</pre>
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<p>With interceptor, you can handle various events in message processing. In this example, a simple interceptor, SimpleMQTTInterceptor, is implemented and configured.
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When the example is running, the interceptor will modify the payload of a sample MQTT message.</p>
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<p>With our interceptor we always return <code>true</code> from the <code>intercept</code> method. If we were
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to return <code>false</code> that signifies that no more interceptors are to run.
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Throw an exception to abort processing of the packet.</p>
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</body>
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</html>
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