hadoop MetricsBuffer 源码
haddop MetricsBuffer 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/metrics2/impl/MetricsBuffer.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.Iterator;
/**
* An immutable element for the sink queues.
*/
class MetricsBuffer implements Iterable<MetricsBuffer.Entry> {
private final Iterable<Entry> mutable;
MetricsBuffer(Iterable<MetricsBuffer.Entry> mutable) {
this.mutable = mutable;
}
@Override
public Iterator<Entry> iterator() {
return mutable.iterator();
}
static class Entry {
private final String sourceName;
private final Iterable<MetricsRecordImpl> records;
Entry(String name, Iterable<MetricsRecordImpl> records) {
sourceName = name;
this.records = records;
}
String name() {
return sourceName;
}
Iterable<MetricsRecordImpl> records() {
return records;
}
}
}
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