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| Exclusive Queues |
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| Management Console |
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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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| <a href="libaio.html"> |
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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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| <a href="rest.html"> |
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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="." >Metrics</a> |
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| <h1 id="metrics">Metrics</h1> |
| <p>Apache ActiveMQ Artemis can export metrics to a variety of monitoring systems |
| via the <a href="https://micrometer.io/" target="_blank">Micrometer</a> vendor-neutral application metrics |
| facade.</p> |
| <p>Important runtime metrics have been instrumented via the Micrometer API, and |
| all a user needs to do is implement <code>org.apache.activemq.artemis.core.server.metrics.ActiveMQMetricsPlugin</code> |
| in order to instantiate and configure a <code>io.micrometer.core.instrument.MeterRegistry</code> |
| implementation. Relevant implementations of <code>MeterRegistry</code> are available from |
| the <a href="https://github.com/micrometer-metrics/micrometer/tree/master/implementations" target="_blank">Micrometer code-base</a>.</p> |
| <p>This is a simple interface:</p> |
| <pre><code class="lang-java"><span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">interface</span> <span class="hljs-title">ActiveMQMetricsPlugin</span> <span class="hljs-keyword">extends</span> <span class="hljs-title">Serializable</span> </span>{ |
| |
| <span class="hljs-function">ActiveMQMetricsPlugin <span class="hljs-title">init</span><span class="hljs-params">(Map<String, String> options)</span></span>; |
| |
| <span class="hljs-function">MeterRegistry <span class="hljs-title">getRegistry</span><span class="hljs-params">()</span></span>; |
| } |
| </code></pre> |
| <p>When the broker starts it will call <code>init</code> and pass in the <code>options</code> which can |
| be specified in XML as key/value properties. At this point the plugin should |
| instantiate and configure the <code>io.micrometer.core.instrument.MeterRegistry</code> |
| implementation.</p> |
| <p>Later during the broker startup process it will call <code>getRegistry</code> in order to |
| get the <code>MeterRegistry</code> implementation and use it for registering meters.</p> |
| <p>The broker ships with two <code>ActiveMQMetricsPlugin</code> implementations:</p> |
| <ul> |
| <li><p><code>org.apache.activemq.artemis.core.server.metrics.plugins.LoggingMetricsPlugin</code> |
| This plugin simply logs metrics. It's not very useful for production, but can |
| serve as a demonstration of the Micrometer integration. It takes no key/value |
| properties for configuration.</p> |
| </li> |
| <li><p><code>org.apache.activemq.artemis.core.server.metrics.plugins.SimpleMetricsPlugin</code> |
| This plugin is used for testing. It is in-memory only and provides no external |
| output. It takes no key/value properties for configuration.</p> |
| </li> |
| </ul> |
| <h2 id="metrics">Metrics</h2> |
| <p>The following metrics are exported, categorized by component. A description for |
| each metric is exported along with the metric itself therefore the description |
| will not be repeated here.</p> |
| <p><strong>Broker</strong></p> |
| <ul> |
| <li>connection.count</li> |
| <li>total.connection.count</li> |
| <li>address.memory.usage</li> |
| </ul> |
| <p><strong>Address</strong></p> |
| <ul> |
| <li>routed.message.count</li> |
| <li>unrouted.message.count</li> |
| </ul> |
| <p><strong>Queue</strong></p> |
| <ul> |
| <li>message.count</li> |
| <li>durable.message.count</li> |
| <li>persistent.size</li> |
| <li>durable.persistent.size</li> |
| <li>delivering.message.count</li> |
| <li>delivering.durable.message.count</li> |
| <li>delivering.persistent.size</li> |
| <li>delivering.durable.persistent.size</li> |
| <li>scheduled.message.count</li> |
| <li>scheduled.durable.message.count</li> |
| <li>scheduled.persistent.size</li> |
| <li>scheduled.durable.persistent.size</li> |
| <li>messages.acknowledged</li> |
| <li>messages.added</li> |
| <li>messages.killed</li> |
| <li>messages.expired</li> |
| <li>consumer.count</li> |
| </ul> |
| <p>It may appear that some higher level broker metrics are missing (e.g. total |
| message count). However, these metrics can be deduced by aggregating the |
| lower level metrics (e.g. aggregate the message.count metrics from all queues |
| to get the total).</p> |
| <p>JVM memory metrics are exported as well.</p> |
| <h2 id="configuration">Configuration</h2> |
| <p>In <code>broker.xml</code> use the <code>metrics-plugin</code> element and specify the <code>class-name</code> |
| attribute to configure your plugin, e.g.:</p> |
| <pre><code class="lang-xml"><span class="hljs-tag"><<span class="hljs-name">metrics-plugin</span> <span class="hljs-attr">class-name</span>=<span class="hljs-string">"org.apache.activemq.artemis.core.server.metrics.plugins.LoggingMetricsPlugin"</span> /></span> |
| </code></pre> |
| <p>As noted, the plugin can also be configured with key/value properties in order |
| to customize its behavior as necessary, e.g.:</p> |
| <pre><code class="lang-xml"><span class="hljs-tag"><<span class="hljs-name">metrics-plugin</span> <span class="hljs-attr">class-name</span>=<span class="hljs-string">"org.example.MyMetricsPlugin"</span>></span> |
| <span class="hljs-tag"><<span class="hljs-name">property</span> <span class="hljs-attr">key</span>=<span class="hljs-string">"host"</span> <span class="hljs-attr">value</span>=<span class="hljs-string">"example.org"</span> /></span> |
| <span class="hljs-tag"><<span class="hljs-name">property</span> <span class="hljs-attr">key</span>=<span class="hljs-string">"port"</span> <span class="hljs-attr">value</span>=<span class="hljs-string">"5162"</span> /></span> |
| <span class="hljs-tag"><<span class="hljs-name">property</span> <span class="hljs-attr">key</span>=<span class="hljs-string">"foo"</span> <span class="hljs-attr">value</span>=<span class="hljs-string">"10"</span> /></span> |
| <span class="hljs-tag"></<span class="hljs-name">metrics-plugin</span>></span> |
| </code></pre> |
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