package org.neo4j.kernel.impl.management;
import java.util.Collection;
import java.util.Iterator;
import javax.management.NotCompliantMBeanException;
import org.neo4j.helpers.Service;
import org.neo4j.kernel.KernelExtension.KernelData;
import org.neo4j.kernel.impl.nioneo.store.WindowPoolStats;
import org.neo4j.kernel.impl.nioneo.xa.NeoStoreXaDataSource;
import org.neo4j.kernel.impl.transaction.XaDataSourceManager;
import org.neo4j.kernel.management.MemoryMapping;
import org.neo4j.kernel.management.WindowPoolInfo;
@Service.Implementation( ManagementBeanProvider.class )
public final class MemoryMappingBean extends ManagementBeanProvider
{
public MemoryMappingBean()
{
super( MemoryMapping.class );
}
@Override
protected Neo4jMBean createMBean( KernelData kernel ) throws NotCompliantMBeanException
{
return new MemoryMappingImpl( this, kernel );
}
@Override
protected Neo4jMBean createMXBean( KernelData kernel ) throws NotCompliantMBeanException
{
return new MemoryMappingImpl( this, kernel, true );
}
@Description( "The status of Neo4j memory mapping" )
private static class MemoryMappingImpl extends Neo4jMBean implements MemoryMapping
{
private final NeoStoreXaDataSource datasource;
MemoryMappingImpl( ManagementBeanProvider provider, KernelData kernel )
throws NotCompliantMBeanException
{
super( provider, kernel );
this.datasource = KernelBean.getNeoDataSource( kernel );
}
MemoryMappingImpl( ManagementBeanProvider provider, KernelData kernel, boolean isMxBean )
{
super( provider, kernel, isMxBean );
XaDataSourceManager mgr = kernel.getConfig().getTxModule().getXaDataSourceManager();
this.datasource = (NeoStoreXaDataSource) mgr.getXaDataSource( "nioneodb" );
}
@Description( "Get information about each pool of memory mapped regions from store files with "
+ "memory mapping enabled" )
public WindowPoolInfo[] getMemoryPools()
{
return getMemoryPoolsImpl( datasource );
}
public static WindowPoolInfo[] getMemoryPoolsImpl( NeoStoreXaDataSource datasource )
{
Collection<WindowPoolStats> stats = datasource.getWindowPoolStats();
WindowPoolInfo[] pools = new WindowPoolInfo[stats.size()];
Iterator<WindowPoolStats> iter = stats.iterator();
for ( int index = 0; iter.hasNext(); index++ )
{
pools[index] = createWindowPoolInfo( iter.next() );
}
return pools;
}
private static WindowPoolInfo createWindowPoolInfo( WindowPoolStats stats )
{
return new WindowPoolInfo( stats.getName(), stats.getMemAvail(), stats.getMemUsed(),
stats.getWindowCount(), stats.getWindowSize(), stats.getHitCount(),
stats.getMissCount(), stats.getOomCount() );
}
}
}