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| <h2 title="Class MetricName" class="title">Class MetricName</h2> |
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| <pre>public final class <span class="typeNameLabel">MetricName</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre> |
| <div class="block">The <code>MetricName</code> class encapsulates a metric's name, logical group and its related attributes. It should be constructed using metrics.MetricName(...). |
| <p> |
| This class captures the following parameters |
| <pre> |
| <b>name</b> The name of the metric |
| <b>group</b> logical group name of the metrics to which this metric belongs. |
| <b>description</b> A human-readable description to include in the metric. This is optional. |
| <b>tags</b> additional key/value attributes of the metric. This is optional. |
| </pre> |
| group, tags parameters can be used to create unique metric names while reporting in JMX or any custom reporting. |
| <p> |
| Ex: standard JMX MBean can be constructed like <b>domainName:type=group,key1=val1,key2=val2</b> |
| <p> |
| |
| Usage looks something like this: |
| <pre class="line-numbers"><code> |
| // set up metrics: |
| |
| Map<String, String> metricTags = new LinkedHashMap<String, String>(); |
| metricTags.put("client-id", "producer-1"); |
| metricTags.put("topic", "topic"); |
| |
| MetricConfig metricConfig = new MetricConfig().tags(metricTags); |
| Metrics metrics = new Metrics(metricConfig); // this is the global repository of metrics and sensors |
| |
| Sensor sensor = metrics.sensor("message-sizes"); |
| |
| MetricName metricName = metrics.metricName("message-size-avg", "producer-metrics", "average message size"); |
| sensor.add(metricName, new Avg()); |
| |
| metricName = metrics.metricName("message-size-max", "producer-metrics"); |
| sensor.add(metricName, new Max()); |
| |
| metricName = metrics.metricName("message-size-min", "producer-metrics", "message minimum size", "client-id", "my-client", "topic", "my-topic"); |
| sensor.add(metricName, new Min()); |
| |
| // as messages are sent we record the sizes |
| sensor.record(messageSize); |
| </code></pre></div> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/kafka/common/MetricName.html#MetricName-java.lang.String-java.lang.String-java.lang.String-java.util.Map-">MetricName</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> group, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> description, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>> tags)</code> |
| <div class="block">Please create MetricName by method <code>Metrics.metricName(String, String, String, Map)</code></div> |
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| <td class="colFirst"><code>boolean</code></td> |
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| <pre>public MetricName(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> name, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> group, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> description, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>> tags)</pre> |
| <div class="block">Please create MetricName by method <code>Metrics.metricName(String, String, String, Map)</code></div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>name</code> - The name of the metric</dd> |
| <dd><code>group</code> - logical group name of the metrics to which this metric belongs</dd> |
| <dd><code>description</code> - A human-readable description to include in the metric</dd> |
| <dd><code>tags</code> - additional key/value attributes of the metric</dd> |
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