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<div class="subTitle">org.apache.hadoop.hbase.metrics.impl</div>
<h2 title="Class GlobalMetricRegistriesAdapter" class="title">Class GlobalMetricRegistriesAdapter</h2>
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<pre>@InterfaceAudience.Private
public final class <a href="../../../../../../src-html/org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.html#line.64">GlobalMetricRegistriesAdapter</a>
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">This class acts as an adapter to export the MetricRegistry's in the global registry. Each
MetricRegistry will be registered or unregistered from the metric2 system. The collection will
be performed via the MetricsSourceAdapter and the MetricRegistry will collected like a
BaseSource instance for a group of metrics (like WAL, RPC, etc) with the MetricRegistryInfo's
JMX context.
<p>Developer note:
Unlike the current metrics2 based approach, the new metrics approach
(hbase-metrics-api and hbase-metrics modules) work by having different MetricRegistries that are
initialized and used from the code that lives in their respective modules (hbase-server, etc).
There is no need to define BaseSource classes and do a lot of indirection. The MetricRegistry'es
will be in the global MetricRegistriesImpl, and this class will iterate over
MetricRegistries.global() and register adapters to the metrics2 subsystem. These adapters then
report the actual values by delegating to
<a href="../../../../../../org/apache/hadoop/hbase/metrics/impl/HBaseMetrics2HadoopMetricsAdapter.html#snapshotAllMetrics-org.apache.hadoop.hbase.metrics.MetricRegistry-org.apache.hadoop.metrics2.MetricsCollector-"><code>HBaseMetrics2HadoopMetricsAdapter.snapshotAllMetrics(MetricRegistry, MetricsCollector)</code></a>.
We do not initialize the Hadoop Metrics2 system assuming that other BaseSources already do so
(see BaseSourceImpl). Once the last BaseSource is moved to the new system, the metric2
initialization should be moved here.
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<td class="colFirst"><code>private class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.MetricsSourceAdapter.html" title="class in org.apache.hadoop.hbase.metrics.impl">GlobalMetricRegistriesAdapter.MetricsSourceAdapter</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/metrics2/MetricsExecutor.html" title="interface in org.apache.hadoop.metrics2">MetricsExecutor</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.html#executor">executor</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/metrics2/lib/DefaultMetricsSystemHelper.html" title="class in org.apache.hadoop.metrics2.lib">DefaultMetricsSystemHelper</a></code></td>
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<td class="colFirst"><code>private static org.slf4j.Logger</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.html#LOG">LOG</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>private <a href="../../../../../../org/apache/hadoop/hbase/metrics/impl/HBaseMetrics2HadoopMetricsAdapter.html" title="class in org.apache.hadoop.hbase.metrics.impl">HBaseMetrics2HadoopMetricsAdapter</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.html#metricsAdapter">metricsAdapter</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/HashMap.html?is-external=true" title="class or interface in java.util">HashMap</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/metrics/MetricRegistryInfo.html" title="class in org.apache.hadoop.hbase.metrics">MetricRegistryInfo</a>,<a href="../../../../../../org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.MetricsSourceAdapter.html" title="class in org.apache.hadoop.hbase.metrics.impl">GlobalMetricRegistriesAdapter.MetricsSourceAdapter</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.html#registeredSources">registeredSources</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>private </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.html#GlobalMetricRegistriesAdapter--">GlobalMetricRegistriesAdapter</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>private void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.html#doRun--">doRun</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>static <a href="../../../../../../org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.html" title="class in org.apache.hadoop.hbase.metrics.impl">GlobalMetricRegistriesAdapter</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.html#init--">init</a></span>()</code>
<div class="block">Make sure that this global MetricSource for hbase-metrics module based metrics are initialized.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.html#stop--">stop</a></span>()</code>&nbsp;</td>
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<pre>private static final&nbsp;org.slf4j.Logger <a href="../../../../../../src-html/org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.html#line.66">LOG</a></pre>
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<pre>private final&nbsp;<a href="../../../../../../org/apache/hadoop/metrics2/MetricsExecutor.html" title="interface in org.apache.hadoop.metrics2">MetricsExecutor</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.html#line.80">executor</a></pre>
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<pre>private final&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicBoolean.html?is-external=true" title="class or interface in java.util.concurrent.atomic">AtomicBoolean</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.html#line.81">stopped</a></pre>
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<pre>private final&nbsp;<a href="../../../../../../org/apache/hadoop/metrics2/lib/DefaultMetricsSystemHelper.html" title="class in org.apache.hadoop.metrics2.lib">DefaultMetricsSystemHelper</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.html#line.82">helper</a></pre>
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<pre>private final&nbsp;<a href="../../../../../../org/apache/hadoop/hbase/metrics/impl/HBaseMetrics2HadoopMetricsAdapter.html" title="class in org.apache.hadoop.hbase.metrics.impl">HBaseMetrics2HadoopMetricsAdapter</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.html#line.83">metricsAdapter</a></pre>
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<pre>private final&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/HashMap.html?is-external=true" title="class or interface in java.util">HashMap</a>&lt;<a href="../../../../../../org/apache/hadoop/hbase/metrics/MetricRegistryInfo.html" title="class in org.apache.hadoop.hbase.metrics">MetricRegistryInfo</a>,<a href="../../../../../../org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.MetricsSourceAdapter.html" title="class in org.apache.hadoop.hbase.metrics.impl">GlobalMetricRegistriesAdapter.MetricsSourceAdapter</a>&gt; <a href="../../../../../../src-html/org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.html#line.84">registeredSources</a></pre>
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<pre>private&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.html#line.86">GlobalMetricRegistriesAdapter</a>()</pre>
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<pre>public static&nbsp;<a href="../../../../../../org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.html" title="class in org.apache.hadoop.hbase.metrics.impl">GlobalMetricRegistriesAdapter</a>&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.html#line.99">init</a>()</pre>
<div class="block">Make sure that this global MetricSource for hbase-metrics module based metrics are initialized.
This should be called only once.</div>
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<pre>public&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.html#line.103">stop</a>()</pre>
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<pre>private&nbsp;void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/metrics/impl/GlobalMetricRegistriesAdapter.html#line.107">doRun</a>()</pre>
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