hadoop MetricsRecordBuilderImpl 源码

haddop MetricsRecordBuilderImpl 代码

文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/impl/MetricsRecordBuilderImpl.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * 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
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hadoop.metrics2.impl;

import java.util.Collections;
import java.util.List;

import org.apache.hadoop.metrics2.AbstractMetric;
import org.apache.hadoop.metrics2.MetricsInfo;
import org.apache.hadoop.metrics2.MetricsCollector;
import org.apache.hadoop.metrics2.MetricsFilter;
import org.apache.hadoop.metrics2.MetricsRecordBuilder;
import org.apache.hadoop.metrics2.MetricsTag;
import org.apache.hadoop.metrics2.lib.Interns;
import org.apache.hadoop.util.Lists;
import org.apache.hadoop.util.Time;

/**
 * {@link MetricsRecordBuilder} implementation used for building metrics records
 * by the {@link MetricsCollector}. It provides the following functionality:
 * <ul>
 * <li>Allows configuring filters for metrics.
 * </ul>
 *
 */
class MetricsRecordBuilderImpl extends MetricsRecordBuilder {
  private final MetricsCollector parent;
  private final long timestamp;
  private final MetricsInfo recInfo;
  private final List<AbstractMetric> metrics;
  private final List<MetricsTag> tags;
  private final MetricsFilter recordFilter, metricFilter;
  private final boolean acceptable;

  /**
   * @param parent {@link MetricsCollector} using this record builder
   * @param info metrics information
   * @param rf
   * @param mf
   * @param acceptable
   */
  MetricsRecordBuilderImpl(MetricsCollector parent, MetricsInfo info,
      MetricsFilter rf, MetricsFilter mf, boolean acceptable) {
    this.parent = parent;
    timestamp = Time.now();
    recInfo = info;
    metrics = Lists.newArrayList();
    tags = Lists.newArrayList();
    recordFilter = rf;
    metricFilter = mf;
    this.acceptable = acceptable;
  }

  @Override
  public MetricsCollector parent() { return parent; }

  @Override
  public MetricsRecordBuilderImpl tag(MetricsInfo info, String value) {
    if (acceptable) {
      tags.add(Interns.tag(info, value));
    }
    return this;
  }

  @Override
  public MetricsRecordBuilderImpl add(MetricsTag tag) {
    tags.add(tag);
    return this;
  }

  @Override
  public MetricsRecordBuilderImpl add(AbstractMetric metric) {
    metrics.add(metric);
    return this;
  }

  @Override
  public MetricsRecordBuilderImpl addCounter(MetricsInfo info, int value) {
    if (acceptable && (metricFilter == null ||
        metricFilter.accepts(info.name()))) {
      metrics.add(new MetricCounterInt(info, value));
    }
    return this;
  }

  @Override
  public MetricsRecordBuilderImpl addCounter(MetricsInfo info, long value) {
    if (acceptable && (metricFilter == null ||
        metricFilter.accepts(info.name()))) {
      metrics.add(new MetricCounterLong(info, value));
    }
    return this;
  }

  @Override
  public MetricsRecordBuilderImpl addGauge(MetricsInfo info, int value) {
    if (acceptable && (metricFilter == null ||
        metricFilter.accepts(info.name()))) {
      metrics.add(new MetricGaugeInt(info, value));
    }
    return this;
  }

  @Override
  public MetricsRecordBuilderImpl addGauge(MetricsInfo info, long value) {
    if (acceptable && (metricFilter == null ||
        metricFilter.accepts(info.name()))) {
      metrics.add(new MetricGaugeLong(info, value));
    }
    return this;
  }

  @Override
  public MetricsRecordBuilderImpl addGauge(MetricsInfo info, float value) {
    if (acceptable && (metricFilter == null ||
        metricFilter.accepts(info.name()))) {
      metrics.add(new MetricGaugeFloat(info, value));
    }
    return this;
  }

  @Override
  public MetricsRecordBuilderImpl addGauge(MetricsInfo info, double value) {
    if (acceptable && (metricFilter == null ||
        metricFilter.accepts(info.name()))) {
      metrics.add(new MetricGaugeDouble(info, value));
    }
    return this;
  }

  @Override
  public MetricsRecordBuilderImpl setContext(String value) {
    return tag(MsInfo.Context, value);
  }

  public MetricsRecordImpl getRecord() {
    if (acceptable && (recordFilter == null || recordFilter.accepts(tags))) {
      return new MetricsRecordImpl(recInfo, timestamp, tags(), metrics());
    }
    return null;
  }

  List<MetricsTag> tags() {
    return Collections.unmodifiableList(tags);
  }

  List<AbstractMetric> metrics() {
    return Collections.unmodifiableList(metrics);
  }
}

相关信息

hadoop 源码目录

相关文章

hadoop AbstractMetricsRecord 源码

hadoop MBeanInfoBuilder 源码

hadoop MetricCounterInt 源码

hadoop MetricCounterLong 源码

hadoop MetricGaugeDouble 源码

hadoop MetricGaugeFloat 源码

hadoop MetricGaugeInt 源码

hadoop MetricGaugeLong 源码

hadoop MetricsBuffer 源码

hadoop MetricsBufferBuilder 源码