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DefaultPageCacheTracer.java
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DefaultPageCacheTracer.java
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/*
* Copyright (c) 2002-2017 "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 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.io.pagecache.tracing;
import java.io.File;
import java.io.IOException;
import java.util.concurrent.atomic.LongAdder;
import org.neo4j.io.pagecache.PageSwapper;
/**
* The default PageCacheTracer implementation, that just increments counters.
*/
public class DefaultPageCacheTracer implements PageCacheTracer
{
protected final LongAdder faults = new LongAdder();
protected final LongAdder evictions = new LongAdder();
protected final LongAdder pins = new LongAdder();
protected final LongAdder unpins = new LongAdder();
protected final LongAdder hits = new LongAdder();
protected final LongAdder flushes = new LongAdder();
protected final LongAdder bytesRead = new LongAdder();
protected final LongAdder bytesWritten = new LongAdder();
protected final LongAdder filesMapped = new LongAdder();
protected final LongAdder filesUnmapped = new LongAdder();
protected final LongAdder evictionExceptions = new LongAdder();
private final FlushEvent flushEvent = new FlushEvent()
{
@Override
public void addBytesWritten( long bytes )
{
bytesWritten.add( bytes );
}
@Override
public void done()
{
flushes.increment();
}
@Override
public void done( IOException exception )
{
done();
}
@Override
public void addPagesFlushed( int pageCount )
{
}
};
private final FlushEventOpportunity flushEventOpportunity = ( filePageId, cachePageId, swapper ) -> flushEvent;
private final EvictionEvent evictionEvent = new EvictionEvent()
{
@Override
public void setFilePageId( long filePageId )
{
}
@Override
public void setSwapper( PageSwapper swapper )
{
}
@Override
public FlushEventOpportunity flushEventOpportunity()
{
return flushEventOpportunity;
}
@Override
public void threwException( IOException exception )
{
evictionExceptions.increment();
}
@Override
public void setCachePageId( long cachePageId )
{
}
@Override
public void close()
{
evictions.increment();
}
};
private final EvictionRunEvent evictionRunEvent = new EvictionRunEvent()
{
@Override
public EvictionEvent beginEviction()
{
return evictionEvent;
}
@Override
public void close()
{
}
};
private final MajorFlushEvent majorFlushEvent = new MajorFlushEvent()
{
@Override
public FlushEventOpportunity flushEventOpportunity()
{
return flushEventOpportunity;
}
@Override
public void close()
{
}
};
@Override
public void mappedFile( File file )
{
filesMapped.increment();
}
@Override
public void unmappedFile( File file )
{
filesUnmapped.increment();
}
@Override
public EvictionRunEvent beginPageEvictions( int pageCountToEvict )
{
return evictionRunEvent;
}
@Override
public MajorFlushEvent beginFileFlush( PageSwapper swapper )
{
return majorFlushEvent;
}
@Override
public MajorFlushEvent beginCacheFlush()
{
return majorFlushEvent;
}
@Override
public long faults()
{
return faults.sum();
}
@Override
public long evictions()
{
return evictions.sum();
}
@Override
public long pins()
{
return pins.sum();
}
@Override
public long unpins()
{
return unpins.sum();
}
@Override
public long hits()
{
return hits.sum();
}
@Override
public long flushes()
{
return flushes.sum();
}
@Override
public long bytesRead()
{
return bytesRead.sum();
}
@Override
public long bytesWritten()
{
return bytesWritten.sum();
}
@Override
public long filesMapped()
{
return filesMapped.sum();
}
@Override
public long filesUnmapped()
{
return filesUnmapped.sum();
}
@Override
public long evictionExceptions()
{
return evictionExceptions.sum();
}
@Override
public void pins( long pins )
{
this.pins.add( pins );
}
@Override
public void unpins( long unpins )
{
this.unpins.add( unpins );
}
@Override
public void hits( long hits )
{
this.hits.add( hits );
}
@Override
public void faults( long faults )
{
this.faults.add( faults );
}
@Override
public void bytesRead( long bytesRead )
{
this.bytesRead.add( bytesRead );
}
@Override
public void evictions( long evictions )
{
this.evictions.add( evictions );
}
@Override
public void evictionExceptions( long evictionExceptions )
{
this.evictionExceptions.add( evictionExceptions );
}
@Override
public void bytesWritten( long bytesWritten )
{
this.bytesWritten.add( bytesWritten );
}
@Override
public void flushes( long flushes )
{
this.flushes.add( flushes );
}
}