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Workload.java
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Workload.java
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/*
* Copyright (c) 2002-2016 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.kernel.stresstests.transaction.checkpoint.workload;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Resource;
import org.neo4j.kernel.stresstests.transaction.checkpoint.mutation.RandomMutation;
public class Workload implements Resource
{
private final int threads;
private final SyncMonitor sync;
private final Worker worker;
private final ExecutorService executor;
public Workload( GraphDatabaseService db, RandomMutation randomMutation, int threads )
{
this.threads = threads;
this.sync = new SyncMonitor( threads );
this.worker = new Worker( db, randomMutation, sync, 100 );
this.executor = Executors.newCachedThreadPool();
}
public interface TransactionThroughput
{
TransactionThroughput NONE = new TransactionThroughput()
{
@Override
public void report( long transactions, long timeSlotMillis )
{
// ignore
}
};
void report( long transactions, long timeSlotMillis);
}
public void run( long runningTimeMillis, TransactionThroughput throughput )
throws InterruptedException
{
for ( int i = 0; i < threads; i++ )
{
executor.submit( worker );
}
TimeUnit.SECONDS.sleep( 20 ); // sleep to make sure workers are started
long now = System.currentTimeMillis();
long previousReportTime = System.currentTimeMillis();
long finishLine = runningTimeMillis + now;
long sampleRate = TimeUnit.SECONDS.toMillis( 10 );
long lastReport = sampleRate + now;
long previousTransactionCount = sync.transactions();
Thread.sleep( sampleRate );
do
{
now = System.currentTimeMillis();
if ( lastReport <= now )
{
long currentTransactionCount = sync.transactions();
long diff = currentTransactionCount - previousTransactionCount;
throughput.report( diff, now - previousReportTime );
previousReportTime = now;
previousTransactionCount = currentTransactionCount;
lastReport = sampleRate + now;
Thread.sleep( sampleRate );
}
else
{
Thread.sleep( 10 );
}
}
while ( now < finishLine );
if ( lastReport < now )
{
long diff = sync.transactions() - previousTransactionCount;
throughput.report( diff, now - previousReportTime );
}
sync.stopAndWaitWorkers();
}
@Override
public void close()
{
try
{
executor.shutdown();
executor.awaitTermination( 10, TimeUnit.SECONDS );
}
catch ( Exception e )
{
throw new RuntimeException( e );
}
}
}