hadoop GenericEventTypeMetrics 源码

  • 2022-10-20
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haddop GenericEventTypeMetrics 代码


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 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
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package org.apache.hadoop.yarn.metrics;

import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.metrics2.MetricsCollector;
import org.apache.hadoop.metrics2.MetricsInfo;
import org.apache.hadoop.metrics2.MetricsSystem;
import org.apache.hadoop.metrics2.annotation.Metrics;
import org.apache.hadoop.metrics2.lib.MetricsRegistry;
import org.apache.hadoop.metrics2.lib.MutableGaugeLong;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.EnumMap;

public class GenericEventTypeMetrics<T extends Enum<T>>
    implements EventTypeMetrics<T> {

  static final Logger LOG =

  private final EnumMap<T, MutableGaugeLong> eventCountMetrics;
  private final EnumMap<T, MutableGaugeLong> processingTimeMetrics;
  private final MetricsRegistry registry;
  private final MetricsSystem ms;
  private final MetricsInfo info;
  private final Class<T> enumClass;

  private boolean isInitialized = false;

  public GenericEventTypeMetrics(MetricsInfo info, MetricsSystem ms,
                                 final T[] enums, Class<T> enumClass) {
    this.enumClass = enumClass;
    this.eventCountMetrics = new EnumMap<>(this.enumClass);
    this.processingTimeMetrics = new EnumMap<>(this.enumClass);
    this.ms = ms;
    this.info = info;
    this.registry = new MetricsRegistry(this.info);

    //Initialize enum
    for (final T type : enums) {
      String eventCountMetricsName =
          type.toString() + "_" + "event_count";
      String processingTimeMetricsName =
          type.toString() + "_" + "processing_time";
      eventCountMetrics.put(type, this.registry.
          newGauge(eventCountMetricsName, eventCountMetricsName, 0L));
      processingTimeMetrics.put(type, this.registry.
          newGauge(processingTimeMetricsName, processingTimeMetricsName, 0L));

  public synchronized GenericEventTypeMetrics registerMetrics() {
    if (!isInitialized) {
      // Register with the MetricsSystems
      if (this.ms != null) {
        LOG.info("Registering GenericEventTypeMetrics");
            info.description(), this);
        isInitialized = true;
    return this;

  public void increment(T type, long processingTimeUs) {
    if (eventCountMetrics.get(type) != null) {

  public long get(T type) {
    return eventCountMetrics.get(type).value();

  public long getTotalProcessingTime(T type) {
    return processingTimeMetrics.get(type).value();

  public EnumMap<T, MutableGaugeLong> getEventCountMetrics() {
    return eventCountMetrics;

  public EnumMap<T, MutableGaugeLong> getProcessingTimeMetrics() {
    return processingTimeMetrics;

  public MetricsRegistry getRegistry() {
    return registry;

  public MetricsInfo getInfo() {
    return info;

  public void getMetrics(MetricsCollector collector, boolean all) {
    registry.snapshot(collector.addRecord(registry.info()), all);

  public Class<T> getEnumClass() {
    return enumClass;

  /** Builder class for GenericEventTypeMetrics. */
  public static class EventTypeMetricsBuilder<T extends Enum<T>>{
    public EventTypeMetricsBuilder() {

    public EventTypeMetricsBuilder setEnumClass(Class<T> enumClassValue) {
      this.enumClass = enumClassValue;
      return this;

    public EventTypeMetricsBuilder setEnums(T[] enumsValue) {
      this.enums = enumsValue.clone();
      return this;

    public EventTypeMetricsBuilder setInfo(MetricsInfo infoValue) {
      this.info = infoValue;
      return this;

    public EventTypeMetricsBuilder setMs(MetricsSystem msValue) {
      this.ms = msValue;
      return this;

    public GenericEventTypeMetrics build() {
      return new GenericEventTypeMetrics(info, ms, enums, enumClass);

    private MetricsSystem ms;
    private MetricsInfo info;
    private Class<T> enumClass;
    private T[] enums;


hadoop 源码目录


hadoop CustomResourceMetricValue 源码

hadoop CustomResourceMetrics 源码

hadoop EventTypeMetrics 源码

hadoop package-info 源码

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