hadoop AbstractCounter 源码
haddop AbstractCounter 代码
文件路径：/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/counters/AbstractCounter.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.mapreduce.counters;
import org.apache.hadoop.thirdparty.com.google.common.base.Objects;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.mapreduce.Counter;
/**
* An abstract counter class to provide common implementation of
* the counter interface in both mapred and mapreduce packages.
*/
@InterfaceAudience.Private
public abstract class AbstractCounter implements Counter {
@Override @Deprecated
public void setDisplayName(String name) {}
@Override
public synchronized boolean equals(Object genericRight) {
if (genericRight instanceof Counter) {
synchronized (genericRight) {
Counter right = (Counter) genericRight;
return getName().equals(right.getName()) &&
getDisplayName().equals(right.getDisplayName()) &&
getValue() == right.getValue();
}
}
return false;
}
@Override
public synchronized int hashCode() {
return Objects.hashCode(getName(), getDisplayName(), getValue());
}
}
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