Examples of org.apache.hadoop.metrics.util.MetricsTimeVaryingRate

org.apache.hadoop.metrics.util.MetricsTimeVaryingRate
The MetricsTimeVaryingRate class is for a rate based metric that naturally varies over time (e.g. time taken to create a file). The rate is averaged at each interval heart beat (the interval is set in the metrics config file). This class also keeps track of the min and max rates along with a method to reset the min-max.

    MetricsTimeVaryingRate newMetric = new MetricsTimeVaryingRate(key, this.registry);
    return newMetric;
  }


  public synchronized void inc(String name, int amt) {
    MetricsTimeVaryingRate m = get(name);
    if (m == null) {
      m = create(name);
    }
    m.inc(amt);
  }

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    synchronized (registry) {
      // Iterate through the registry to propogate the different rpc metrics.


      for (String metricName : registry.getKeyList() ) {
        MetricsTimeVaryingRate value = (MetricsTimeVaryingRate) registry.get(metricName);


        value.pushMetric(metricsRecord);
      }
    }
    metricsRecord.update();
  }

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  public void setUp() {
    this.registry = new MetricsRegistry();
    this.metricsRate = new MetricsRate("metricsRate", registry, "test");
    this.intValue = new MetricsIntValue("intValue", registry, "test");
    this.varyRate = new MetricsTimeVaryingRate("varyRate", registry, "test");
    this.stats = new TestStatistics(registry);
    MetricsContext context = MetricsUtil.getContext("hbase");
    this.metricsRecord = MetricsUtil.createRecord(context, "test");
    this.metricsRecord.setTag("TestStatistics", "test");
    //context.registerUpdater(this);

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  private MetricsTimeVaryingRate get(String key) {
    return (MetricsTimeVaryingRate) registry.get(key);
  }
  private MetricsTimeVaryingRate create(String key) {
    return new MetricsTimeVaryingRate(key, this.registry);
  }

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  private MetricsTimeVaryingRate create(String key) {
    return new MetricsTimeVaryingRate(key, this.registry);
  }


  public void inc(String name, int amt) {
    MetricsTimeVaryingRate m = get(name);
    if (m == null) {
      LOG.warn("Got inc() request for method that doesnt exist: " +
      name);
      return; // ignore methods that dont exist.
    }
    m.inc(amt);
  }

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    synchronized (registry) {
      // Iterate through the registry to propagate the different rpc metrics.


      for (String metricName : registry.getKeyList() ) {
        MetricsTimeVaryingRate value = (MetricsTimeVaryingRate) registry.get(metricName);


        value.pushMetric(metricsRecord);
      }
    }
    metricsRecord.update();
  }

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                    " procesingTime= " + processingTime);
        }
        rpcMetrics.rpcQueueTime.inc(qTime);
        rpcMetrics.rpcProcessingTime.inc(processingTime);


        MetricsTimeVaryingRate m =
         (MetricsTimeVaryingRate) rpcMetrics.registry.get(call.getMethodName());
        if (m == null) {
          try {
            m = new MetricsTimeVaryingRate(call.getMethodName(),
                                                rpcMetrics.registry);
          } catch (IllegalArgumentException iae) {
            // the metrics has been registered; re-fetch the handle
            LOG.info("Error register " + call.getMethodName(), iae);
            m = (MetricsTimeVaryingRate) rpcMetrics.registry.get(
                call.getMethodName());
          }
        }
        m.inc(processingTime);


        if (verbose) log("Return: "+value);


        return new ObjectWritable(method.getReturnType(), value);

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            " queueTime= " + qTime +
            " procesingTime= " + processingTime);
        rpcMetrics.rpcQueueTime.inc(qTime);
        rpcMetrics.rpcProcessingTime.inc(processingTime);


  MetricsTimeVaryingRate m = rpcMetrics.metricsList.get(call.getMethodName());


  if (m != null) {
    m.inc(processingTime);
  }
  else {
    rpcMetrics.metricsList.put(call.getMethodName(), new MetricsTimeVaryingRate(call.getMethodName()));
    m = rpcMetrics.metricsList.get(call.getMethodName());
    m.inc(processingTime);
  }


        if (verbose) log("Return: "+value);


        return new ObjectWritable(method.getReturnType(), value);

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            " queueTime= " + qTime +
            " procesingTime= " + processingTime);
        rpcMetrics.rpcQueueTime.inc(qTime);
        rpcMetrics.rpcProcessingTime.inc(processingTime);


  MetricsTimeVaryingRate m = rpcMetrics.metricsList.get(call.getMethodName());


  if (m != null) {
    m.inc(processingTime);
  }
  else {
    rpcMetrics.metricsList.put(call.getMethodName(), new MetricsTimeVaryingRate(call.getMethodName()));
    m = rpcMetrics.metricsList.get(call.getMethodName());
    m.inc(processingTime);
  }


        if (verbose) log("Return: "+value);


        return new ObjectWritable(method.getReturnType(), value);

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    assertTrue(server.rpcMetrics.sentBytes.getPreviousIntervalValue() > 0);
    assertTrue(server.rpcMetrics.receivedBytes.getPreviousIntervalValue() > 0);
    
    // Number of calls to echo method should be 2
    server.rpcDetailedMetrics.doUpdates(new NullContext());
    MetricsTimeVaryingRate metrics = 
      (MetricsTimeVaryingRate)server.rpcDetailedMetrics.registry.get("echo");
    assertEquals(2, metrics.getPreviousIntervalNumOps());
    
    // Number of calls to ping method should be 1
    metrics = 
      (MetricsTimeVaryingRate)server.rpcDetailedMetrics.registry.get("ping");
    assertEquals(1, metrics.getPreviousIntervalNumOps());
    
    String[] stringResults = proxy.echo(new String[]{"foo","bar"});
    assertTrue(Arrays.equals(stringResults, new String[]{"foo","bar"}));


    stringResults = proxy.echo((String[])null);

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