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| Metrics |
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| Security |
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| Masking Passwords |
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| Broker Plugins |
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| Resource Limits |
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| The JMS Bridge |
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| Client Reconnection and Session Reattachment |
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| Diverting and Splitting Message Flows |
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| Core Bridges |
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| Transformers |
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| Duplicate Message Detection |
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| Clusters |
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| Federation |
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| Address Federation |
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| Queue Federation |
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| High Availability and Failover |
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| Graceful Server Shutdown |
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| Libaio Native Libraries |
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| </a> |
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| Thread management |
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| Embedded Web Server |
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| Logging |
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| REST Interface |
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| Embedding the Broker |
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| Apache Karaf |
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| Apache Tomcat |
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| Spring Integration |
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| CDI Integration |
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| Intercepting Operations |
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| Data Tools |
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| <a href="." >Broker Plugins</a> |
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| <h1 id="apache-activemq-artemis-plugin-support">Apache ActiveMQ Artemis Plugin Support</h1> |
| <p>Apache ActiveMQ Artemis is designed to allow extra functionality to be added by |
| creating a plugin. Multiple plugins can be registered at the same time and they |
| will be chained together and executed in the order they are registered (i.e. |
| the first plugin registered is always executed first).</p> |
| <p>Creating a plugin is very simple. It requires:</p> |
| <ul> |
| <li>Implementing the <a href="https://github.com/apache/activemq-artemis/blob/master/artemis-server/src/main/java/org/apache/activemq/artemis/core/server/plugin/ActiveMQServerPlugin.java" target="_blank"><code>ActiveMQServerPlugin</code></a> |
| interface</li> |
| <li>Making sure the plugin is <a href="using-server.html#adding-runtime-dependencies">on the classpath</a></li> |
| <li>Registering it with the broker either via <a href="#registering-a-plugin">xml</a> or <a href="#registering-a-plugin-programmatically">programmatically</a>.</li> |
| </ul> |
| <p>Only the methods that you want to add behavior for need to be implemented as |
| all of the interface methods are default methods.</p> |
| <h2 id="registering-a-plugin">Registering a Plugin</h2> |
| <p>To register a plugin with by XML you need to add the <code>broker-plugins</code> element |
| at the <code>broker.xml</code>. It is also possible to pass configuration to a plugin |
| using the <code>property</code> child element(s). These properties (zero to many) will be |
| read and passed into the plugin's <code>init(Map<String, String>)</code> operation after |
| the plugin has been instantiated.</p> |
| <pre><code class="lang-xml"><span class="hljs-tag"><<span class="hljs-name">broker-plugins</span>></span> |
| <span class="hljs-tag"><<span class="hljs-name">broker-plugin</span> <span class="hljs-attr">class-name</span>=<span class="hljs-string">"some.plugin.UserPlugin"</span>></span> |
| <span class="hljs-tag"><<span class="hljs-name">property</span> <span class="hljs-attr">key</span>=<span class="hljs-string">"property1"</span> <span class="hljs-attr">value</span>=<span class="hljs-string">"val_1"</span> /></span> |
| <span class="hljs-tag"><<span class="hljs-name">property</span> <span class="hljs-attr">key</span>=<span class="hljs-string">"property2"</span> <span class="hljs-attr">value</span>=<span class="hljs-string">"val_2"</span> /></span> |
| <span class="hljs-tag"></<span class="hljs-name">broker-plugin</span>></span> |
| <span class="hljs-tag"></<span class="hljs-name">broker-plugins</span>></span> |
| </code></pre> |
| <h2 id="registering-a-plugin-programmatically">Registering a Plugin Programmatically</h2> |
| <p>For registering a plugin programmatically you need to call the |
| <code>registerBrokerPlugin()</code> method and pass in a new instance of your plugin. In |
| the example below assuming your plugin is called <code>UserPlugin</code>, registering it |
| looks like the following:</p> |
| <pre><code class="lang-java">... |
| |
| Configuration config = <span class="hljs-keyword">new</span> ConfigurationImpl(); |
| ... |
| |
| config.registerBrokerPlugin(<span class="hljs-keyword">new</span> UserPlugin()); |
| </code></pre> |
| <h2 id="using-the-loggingactivemqserverplugin">Using the <code>LoggingActiveMQServerPlugin</code></h2> |
| <p>The <code>LoggingActiveMQServerPlugin</code> logs specific broker events.</p> |
| <p>You can select which events are logged by setting the following configuration |
| properties to <code>true</code>.</p> |
| <table> |
| <thead> |
| <tr> |
| <th>Property</th> |
| <th>Trigger Event</th> |
| <th>Default Value</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><code>LOG_CONNECTION_EVENTS</code></td> |
| <td>Connection is created/destroy.</td> |
| <td><code>false</code></td> |
| </tr> |
| <tr> |
| <td><code>LOG_SESSION_EVENTS</code></td> |
| <td>Session is created/closed.</td> |
| <td><code>false</code></td> |
| </tr> |
| <tr> |
| <td><code>LOG_CONSUMER_EVENTS</code></td> |
| <td>Consumer is created/closed</td> |
| <td><code>false</code></td> |
| </tr> |
| <tr> |
| <td><code>LOG_DELIVERING_EVENTS</code></td> |
| <td>Message is delivered to a consumer and when a message is acknowledged by a consumer.</td> |
| <td><code>false</code></td> |
| </tr> |
| <tr> |
| <td><code>LOG_SENDING_EVENTS</code></td> |
| <td>When a message has been sent to an address and when a message has been routed within the broker.</td> |
| <td><code>false</code></td> |
| </tr> |
| <tr> |
| <td><code>LOG_INTERNAL_EVENTS</code></td> |
| <td>When a queue created/destroyed, when a message is expired, when a bridge is deployed and when a critical failure occurs.</td> |
| <td><code>false</code></td> |
| </tr> |
| <tr> |
| <td><code>LOG_ALL_EVENTS</code></td> |
| <td>Includes all the above events.</td> |
| <td><code>false</code></td> |
| </tr> |
| </tbody> |
| </table> |
| <p>By default the <code>LoggingActiveMQServerPlugin</code> will not log any information. The |
| logging is activated by setting one (or a selection) of the above configuration |
| properties to <code>true</code>.</p> |
| <p>To configure the plugin, you can add the following configuration to the broker. |
| In the example below both <code>LOG_DELIVERING_EVENTS</code> and <code>LOG_SENDING_EVENTS</code> will |
| be logged by the broker.</p> |
| <pre><code class="lang-xml"><span class="hljs-tag"><<span class="hljs-name">broker-plugins</span>></span> |
| <span class="hljs-tag"><<span class="hljs-name">broker-plugin</span> <span class="hljs-attr">class-name</span>=<span class="hljs-string">"org.apache.activemq.artemis.core.server.plugin.impl.LoggingActiveMQServerPlugin"</span>></span> |
| <span class="hljs-tag"><<span class="hljs-name">property</span> <span class="hljs-attr">key</span>=<span class="hljs-string">"LOG_DELIVERING_EVENTS"</span> <span class="hljs-attr">value</span>=<span class="hljs-string">"true"</span> /></span> |
| <span class="hljs-tag"><<span class="hljs-name">property</span> <span class="hljs-attr">key</span>=<span class="hljs-string">"LOG_SENDING_EVENTS"</span> <span class="hljs-attr">value</span>=<span class="hljs-string">"true"</span> /></span> |
| <span class="hljs-tag"></<span class="hljs-name">broker-plugin</span>></span> |
| <span class="hljs-tag"></<span class="hljs-name">broker-plugins</span>></span> |
| </code></pre> |
| <p>Most events in the <code>LoggingActiveMQServerPlugin</code> follow a <code>beforeX</code> and |
| <code>afterX</code> notification pattern (e.g <code>beforeCreateConsumer()</code> and |
| <code>afterCreateConsumer()</code>).</p> |
| <p>At Log Level <code>INFO</code>, the LoggingActiveMQServerPlugin logs an entry when an |
| <code>afterX</code> notification occurs. By setting the logger |
| <code>org.apache.activemq.artemis.core.server.plugin.impl</code> to <code>DEBUG</code>, log entries |
| are generated for both <code>beforeX</code> and <code>afterX</code> notifications. Log level <code>DEBUG</code> |
| will also log more information for a notification when available.</p> |
| <h2 id="using-the-notificationactivemqserverplugin">Using the NotificationActiveMQServerPlugin</h2> |
| <p>The NotificationActiveMQServerPlugin can be configured to send extra |
| notifications for specific broker events.</p> |
| <p>You can select which notifications are sent by setting the following |
| configuration properties to <code>true</code>.</p> |
| <table> |
| <thead> |
| <tr> |
| <th>Property</th> |
| <th>Property Description</th> |
| <th>Default Value</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><code>SEND_CONNECTION_NOTIFICATIONS</code></td> |
| <td>Sends a notification when a Connection is created/destroy.</td> |
| <td><code>false</code>.</td> |
| </tr> |
| <tr> |
| <td><code>SEND_SESSION_NOTIFICATIONS</code></td> |
| <td>Sends a notification when a Session is created/closed.</td> |
| <td><code>false</code>.</td> |
| </tr> |
| <tr> |
| <td><code>SEND_ADDRESS_NOTIFICATIONS</code></td> |
| <td>Sends a notification when an Address is added/removed.</td> |
| <td><code>false</code>.</td> |
| </tr> |
| <tr> |
| <td><code>SEND_DELIVERED_NOTIFICATIONS</code></td> |
| <td>Sends a notification when message is delivered to a consumer.</td> |
| <td><code>false</code></td> |
| </tr> |
| <tr> |
| <td><code>SEND_EXPIRED_NOTIFICATIONS</code></td> |
| <td>Sends a notification when message has been expired by the broker.</td> |
| <td><code>false</code></td> |
| </tr> |
| </tbody> |
| </table> |
| <p>By default the NotificationActiveMQServerPlugin will not send any |
| notifications. The plugin is activated by setting one (or a selection) of the |
| above configuration properties to <code>true</code>.</p> |
| <p>To configure the plugin, you can add the following configuration to the broker. |
| In the example below both <code>SEND_CONNECTION_NOTIFICATIONS</code> and |
| <code>SEND_SESSION_NOTIFICATIONS</code> will be sent by the broker.</p> |
| <pre><code class="lang-xml"><span class="hljs-tag"><<span class="hljs-name">broker-plugins</span>></span> |
| <span class="hljs-tag"><<span class="hljs-name">broker-plugin</span> <span class="hljs-attr">class-name</span>=<span class="hljs-string">"org.apache.activemq.artemis.core.server.plugin.impl.NotificationActiveMQServerPlugin"</span>></span> |
| <span class="hljs-tag"><<span class="hljs-name">property</span> <span class="hljs-attr">key</span>=<span class="hljs-string">"SEND_CONNECTION_NOTIFICATIONS"</span> <span class="hljs-attr">value</span>=<span class="hljs-string">"true"</span> /></span> |
| <span class="hljs-tag"><<span class="hljs-name">property</span> <span class="hljs-attr">key</span>=<span class="hljs-string">"SEND_SESSION_NOTIFICATIONS"</span> <span class="hljs-attr">value</span>=<span class="hljs-string">"true"</span> /></span> |
| <span class="hljs-tag"></<span class="hljs-name">broker-plugin</span>></span> |
| <span class="hljs-tag"></<span class="hljs-name">broker-plugins</span>></span> |
| </code></pre> |
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