Examples of org.apache.hadoop.metrics2.lib.MetricsSourceBuilder

org.apache.hadoop.metrics2.MetricsException
Helper class to build metrics source object from annotations

import org.mockito.ArgumentCaptor;
import org.mockito.internal.util.reflection.Whitebox;


public class TestGraphiteMetrics {
    private AbstractMetric makeMetric(String name, Number value) {
        AbstractMetric metric = mock(AbstractMetric.class);
        when(metric.name()).thenReturn(name);
        when(metric.value()).thenReturn(value);
        return metric;
    }

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  @Test public void testPresence() {
    JvmPauseMonitor pauseMonitor = new JvmPauseMonitor(new Configuration());
    JvmMetrics jvmMetrics = new JvmMetrics("test", "test");
    jvmMetrics.setPauseMonitor(pauseMonitor);
    MetricsRecordBuilder rb = getMetrics(jvmMetrics);
    MetricsCollector mc = rb.parent();


    verify(mc).addRecord(JvmMetrics);
    verify(rb).tag(ProcessName, "test");
    verify(rb).tag(SessionId, "test");
    for (JvmMetricsInfo info : JvmMetricsInfo.values()) {

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  @Override
  public synchronized void start() {
    checkNotNull(prefix, "prefix");
    if (monitoring) {
      LOG.warn(prefix +" metrics system already started!",
               new MetricsException("Illegal start"));
      return;
    }
    for (Callback cb : callbacks) cb.preStart();
    configure(prefix);
    startTimer();

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  @Override
  public synchronized void stop() {
    if (!monitoring && !DefaultMetricsSystem.inMiniClusterMode()) {
      LOG.warn(prefix +" metrics system not yet started!",
               new MetricsException("Illegal stop"));
      return;
    }
    if (!monitoring) {
      // in mini cluster mode
      LOG.info(prefix +" metrics system stopped (again)");

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    MetricsTag tag = new MetricsTag(name, description, value);


    if (!override) {
      MetricsTag existing = tagsMap.putIfAbsent(name, tag);
      if (existing != null) {
        throw new MetricsException("Tag " + name + " already exists!");
      }
      return this;
    }


    tagsMap.put(name, tag);

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        return newGauge;
      }
    }


    if (!(metric instanceof MetricMutableGaugeLong)) {
      throw new MetricsException(
          "Metric already exists in registry for metric name: " + name
              + " and not of type MetricMutableGaugeLong");
    }


    return (MetricMutableGaugeLong) metric;

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        return newCounter;
      }
    }


    if (!(counter instanceof MetricMutableCounterLong)) {
      throw new MetricsException(
          "Metric already exists in registry for metric name: " + name
              + "and not of type MetricMutableCounterLong");
    }


    return (MetricMutableCounterLong) counter;

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        return newHisto;
      }
    }


    if (!(histo instanceof MetricMutableHistogram)) {
      throw new MetricsException(
          "Metric already exists in registry for metric name: " + name
              + "and not of type MetricMutableHistogram");
    }


    return (MetricMutableHistogram) histo;

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        return newHisto;
      }
    }


    if (!(histo instanceof MetricMutableQuantiles)) {
      throw new MetricsException(
          "Metric already exists in registry for metric name: " + name
              + "and not of type MetricMutableQuantiles");
    }


    return (MetricMutableQuantiles) histo;

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  }


  private <T> T returnExistingWithCast(MetricMutable metric,
      Class<T> metricClass, String name) {
    if (!metricClass.isAssignableFrom(metric.getClass())) {
      throw new MetricsException(
          "Metric already exists in registry for metric name: " + name
              + " and not of type " + metricClass);
    }


    return (T) metric;

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