org.apache.parquet.hadoop.util.counters.mapreduce.MapReduceCounterLoader Maven / Gradle / Ivy
/*
* 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.parquet.hadoop.util.counters.mapreduce;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.apache.hadoop.mapreduce.TaskInputOutputContext;
import org.apache.parquet.hadoop.util.ContextUtil;
import org.apache.parquet.hadoop.util.counters.BenchmarkCounter;
import org.apache.parquet.hadoop.util.counters.CounterLoader;
import org.apache.parquet.hadoop.util.counters.ICounter;
/**
* Concrete factory for counters in mapred API,
* get a counter using mapreduce API when the corresponding flag is set, otherwise return a NullCounter
*/
public class MapReduceCounterLoader implements CounterLoader {
private TaskAttemptContext context;
public MapReduceCounterLoader(TaskAttemptContext context) {
this.context = context;
}
@Override
public ICounter getCounterByNameAndFlag(String groupName, String counterName, String counterFlag) {
if (ContextUtil.getConfiguration(context).getBoolean(counterFlag, true)) {
return new MapReduceCounterAdapter(ContextUtil.getCounter(context, groupName, counterName));
} else {
return new BenchmarkCounter.NullCounter();
}
}
}