parquet.hadoop.util.counters.mapred.MapRedCounterLoader Maven / Gradle / Ivy
/**
* Copyright 2012 Twitter, Inc.
*
* Licensed 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 parquet.hadoop.util.counters.mapred;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapred.Reporter;
import parquet.hadoop.util.counters.BenchmarkCounter;
import parquet.hadoop.util.counters.CounterLoader;
import parquet.hadoop.util.counters.ICounter;
/**
* Concrete factory for counters in mapred API,
* get a counter using mapred API when the corresponding flag is set, otherwise return a NullCounter
* @author Tianshuo Deng
*/
public class MapRedCounterLoader implements CounterLoader {
private Reporter reporter;
private Configuration conf;
public MapRedCounterLoader(Reporter reporter, Configuration conf) {
this.reporter = reporter;
this.conf = conf;
}
@Override
public ICounter getCounterByNameAndFlag(String groupName, String counterName, String counterFlag) {
if (conf.getBoolean(counterFlag, true)) {
return new MapRedCounterAdapter(reporter.getCounter(groupName, counterName));
} else {
return new BenchmarkCounter.NullCounter();
}
}
}