Examples of org.apache.hadoop.metrics2.MetricsRecordBuilder

org.apache.hadoop.metrics2.MetricsRecordBuilder
The metrics record builder interface

   * @param all            push all or only changed?
   */
  @Override
  public void getMetrics(MetricsBuilder metricsBuilder, boolean all) {


    MetricsRecordBuilder metricsRecordBuilder = metricsBuilder.addRecord(metricsName)
        .setContext(metricsContext);


    // masterWrapper can be null because this function is called inside of init.
    if (masterWrapper != null) {
      metricsRecordBuilder
          .addGauge(MASTER_ACTIVE_TIME_NAME,
              MASTER_ACTIVE_TIME_DESC, masterWrapper.getActiveTime())
          .addGauge(MASTER_START_TIME_NAME,
              MASTER_START_TIME_DESC, masterWrapper.getStartTime())
          .addGauge(AVERAGE_LOAD_NAME, AVERAGE_LOAD_DESC, masterWrapper.getAverageLoad())

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  @After
  public void tearDown() throws Exception {
    MetricsSource source = DefaultMetricsSystem.instance().getSource("UgiMetrics");
    if (source != null) {
      // Run only once since the UGI metrics is cleaned up during teardown
      MetricsRecordBuilder rb = getMetrics(source);
      assertQuantileGauges("GetGroups1s", rb);
    }
    cluster.shutdown();
  }

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   * Test that capacity metrics are exported and pass
   * basic sanity tests.
   */
  @Test (timeout = 1800)
  public void testCapacityMetrics() throws Exception {
    MetricsRecordBuilder rb = getMetrics(NS_METRICS);
    long capacityTotal = MetricsAsserts.getLongGauge("CapacityTotal", rb);
    assert(capacityTotal != 0);
    long capacityUsed = MetricsAsserts.getLongGauge("CapacityUsed", rb);
    long capacityRemaining =
        MetricsAsserts.getLongGauge("CapacityRemaining", rb);

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    final long blockCount = 32;
    int blockCapacity = namesystem.getBlockCapacity();
    updateMetrics();
    assertGauge("BlockCapacity", blockCapacity, getMetrics(NS_METRICS));


    MetricsRecordBuilder rb = getMetrics(NN_METRICS);
    // File create operations is 1
    // Number of files created is depth of <code>file</code> path
    assertCounter("CreateFileOps", 1L, rb);
    assertCounter("FilesCreated", (long)file.depth(), rb);

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          "STORAGE_ID", "TEST");
    } finally {
      cluster.getNamesystem().writeUnlock();
    }
    updateMetrics();
    MetricsRecordBuilder rb = getMetrics(NS_METRICS);
    assertGauge("CorruptBlocks", 1L, rb);
    assertGauge("PendingReplicationBlocks", 1L, rb);
    assertGauge("ScheduledReplicationBlocks", 1L, rb);
    fs.delete(file, true);
    rb = waitForDnMetricValue(NS_METRICS, "CorruptBlocks", 0L);

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    Path file = getTestPath("testExcessBlocks");
    createFile(file, 100, (short)2);
    long totalBlocks = 1;
    NameNodeAdapter.setReplication(namesystem, file.toString(), (short)1);
    updateMetrics();
    MetricsRecordBuilder rb = getMetrics(NS_METRICS);
    assertGauge("ExcessBlocks", totalBlocks, rb);
    fs.delete(file, true);
  }

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          "STORAGE_ID", "TEST");
    } finally {
      cluster.getNamesystem().writeUnlock();
    }
    updateMetrics();
    MetricsRecordBuilder rb = getMetrics(NS_METRICS);
    assertGauge("UnderReplicatedBlocks", 1L, rb);
    assertGauge("MissingBlocks", 1L, rb);
    fs.delete(file, true);
    waitForDnMetricValue(NS_METRICS, "UnderReplicatedBlocks", 0L);
  }

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   */
  private MetricsRecordBuilder waitForDnMetricValue(String source,
                                                    String name,
                                                    long expected)
      throws Exception {
    MetricsRecordBuilder rb;
    long gauge;
    //initial wait.
    waitForDeletion();
    //lots of retries are allowed for slow systems; fast ones will still
    //exit early

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    createFile(src, 100, (short)1);
    Path target = getTestPath("target");
    createFile(target, 100, (short)1);
    fs.rename(src, target, Rename.OVERWRITE);
    updateMetrics();
    MetricsRecordBuilder rb = getMetrics(NN_METRICS);
    assertCounter("FilesRenamed", 1L, rb);
    assertCounter("FilesDeleted", 1L, rb);
  }

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   * Tests that the sync and block report metrics get updated on cluster
   * startup.
   */
  @Test
  public void testSyncAndBlockReportMetric() throws Exception {
    MetricsRecordBuilder rb = getMetrics(NN_METRICS);
    // We have one sync when the cluster starts up, just opening the journal
    assertCounter("SyncsNumOps", 1L, rb);
    // Each datanode reports in when the cluster comes up
    assertCounter("BlockReportNumOps",
                  (long)DATANODE_COUNT*MiniDFSCluster.DIRS_PER_DATANODE, rb);

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