hadoop AuditReplayReducer 源码
haddop AuditReplayReducer 代码
文件路径：/hadoop-tools/hadoop-dynamometer/hadoop-dynamometer-workload/src/main/java/org/apache/hadoop/tools/dynamometer/workloadgenerator/audit/AuditReplayReducer.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.tools.dynamometer.workloadgenerator.audit;
import org.apache.hadoop.mapreduce.Reducer;
import java.io.IOException;
/**
* AuditReplayReducer aggregates the returned latency values from
* {@link AuditReplayMapper} and sums them up by {@link UserCommandKey}, which
* combines the user's id that ran the command and the type of the command
* (READ/WRITE).
*/
public class AuditReplayReducer extends Reducer<UserCommandKey,
CountTimeWritable, UserCommandKey, CountTimeWritable> {
@Override
protected void reduce(UserCommandKey key, Iterable<CountTimeWritable> values,
Context context) throws IOException, InterruptedException {
long countSum = 0;
long timeSum = 0;
for (CountTimeWritable v : values) {
countSum += v.getCount();
timeSum += v.getTime();
}
context.write(key, new CountTimeWritable(countSum, timeSum));
}
}
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