001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.metrics2.impl;
019
020import java.util.ArrayList;
021import java.util.Collection;
022import java.util.List;
023import org.apache.hadoop.metrics2.MetricsRecord;
024import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem;
025import org.apache.yetus.audience.InterfaceAudience;
026
027@InterfaceAudience.Private
028public final class MetricsExportHelper {
029  private MetricsExportHelper() {
030  }
031
032  public static Collection<MetricsRecord> export() {
033    MetricsSystemImpl instance = (MetricsSystemImpl) DefaultMetricsSystem.instance();
034    MetricsBuffer metricsBuffer = instance.sampleMetrics();
035    List<MetricsRecord> metrics = new ArrayList<>();
036    for (MetricsBuffer.Entry entry : metricsBuffer) {
037      entry.records().forEach(metrics::add);
038    }
039    return metrics;
040  }
041
042}