/*
* Copyright (c) 2007-2014 Concurrent, Inc. All Rights Reserved.
*
* Project and contact information: http://www.cascading.org/
*
* This file is part of the Cascading project.
*
* 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 cascading.stats.tez;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import cascading.stats.CascadingStats;
import cascading.stats.hadoop.CounterCache;
import org.apache.hadoop.conf.Configuration;
import org.apache.tez.common.counters.CounterGroup;
import org.apache.tez.common.counters.TezCounter;
import org.apache.tez.common.counters.TezCounters;
/**
*
*/
public abstract class TezCounterCache<JobStatus> extends CounterCache<JobStatus, TezCounters>
{
protected TezCounterCache( CascadingStats stats, Configuration configuration )
{
super( stats, configuration );
}
@Override
protected Collection<String> getGroupNames( TezCounters counterGroups )
{
Iterable<String> iterable = counterGroups.getGroupNames();
if( iterable == null ) // it's hadoop, be defensive
return Collections.emptySet();
Set<String> groupNames = new HashSet<>();
for( String groupName : iterable )
groupNames.add( groupName );
return groupNames;
}
@Override
protected Set<String> getCountersFor( TezCounters counterGroups, String group )
{
Set<String> results = new HashSet<>();
for( TezCounter counter : counterGroups.getGroup( group ) )
results.add( counter.getName() );
return results;
}
@Override
protected long getCounterValue( TezCounters counterGroups, Enum counter )
{
TezCounter tezCounter = counterGroups.findCounter( counter );
if( tezCounter == null )
return 0;
return tezCounter.getValue();
}
@Override
protected long getCounterValue( TezCounters counterGroups, String groupName, String counterName )
{
CounterGroup counterGroup = counterGroups.getGroup( groupName );
if( counterGroup == null )
return 0;
TezCounter counterValue = counterGroup.findCounter( counterName );
if( counterValue == null )
return 0;
return counterValue.getValue();
}
}