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LockManagerBean.java
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LockManagerBean.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.management.impl;
import java.util.ArrayList;
import java.util.List;
import javax.management.NotCompliantMBeanException;
import org.neo4j.helpers.Service;
import org.neo4j.jmx.impl.ManagementBeanProvider;
import org.neo4j.jmx.impl.ManagementData;
import org.neo4j.jmx.impl.Neo4jMBean;
import org.neo4j.kernel.impl.locking.Locks;
import org.neo4j.kernel.info.LockInfo;
import org.neo4j.management.LockManager;
@Service.Implementation( ManagementBeanProvider.class )
public final class LockManagerBean extends ManagementBeanProvider
{
public LockManagerBean()
{
super( LockManager.class );
}
@Override
protected Neo4jMBean createMBean( ManagementData management ) throws NotCompliantMBeanException
{
return new LockManagerImpl( management );
}
@Override
protected Neo4jMBean createMXBean( ManagementData management ) throws NotCompliantMBeanException
{
return new LockManagerImpl( management, true );
}
private static class LockManagerImpl extends Neo4jMBean implements LockManager
{
private final Locks lockManager;
LockManagerImpl( ManagementData management ) throws NotCompliantMBeanException
{
super( management );
this.lockManager = lockManager( management );
}
private Locks lockManager( ManagementData management )
{
try
{
return management.getKernelData().graphDatabase().getDependencyResolver()
.resolveDependency( Locks.class );
}
catch(Throwable e)
{
e.printStackTrace();
return null;
}
}
LockManagerImpl( ManagementData management, boolean mxBean )
{
super( management, mxBean );
this.lockManager = lockManager( management );
}
@Override
public long getNumberOfAvertedDeadlocks()
{
return -1l;
}
@Override
public List<LockInfo> getLocks()
{
final List<LockInfo> locks = new ArrayList<>();
lockManager.accept( new Locks.Visitor()
{
@Override
public void visit( Locks.ResourceType resourceType, long resourceId, String description, long waitTime,
long lockIdentityHashCode )
{
locks.add( new LockInfo( resourceType.toString(), String.valueOf( resourceId ), description ) );
}
});
return locks;
}
@Override
public List<LockInfo> getContendedLocks( final long minWaitTime )
{
// Contended locks can no longer be found by the new lock manager, since that knowledge is not centralized.
return getLocks();
}
}
}