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FusionIndexAccessor.java
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FusionIndexAccessor.java
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/*
* Copyright (c) 2002-2019 "Neo4j,"
* Neo4j Sweden AB [http://neo4j.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.kernel.impl.index.schema.fusion;
import java.io.File;
import java.util.Iterator;
import org.neo4j.graphdb.ResourceIterator;
import org.neo4j.helpers.collection.BoundedIterable;
import org.neo4j.helpers.collection.Iterables;
import org.neo4j.io.pagecache.IOLimiter;
import org.neo4j.kernel.api.exceptions.index.IndexEntryConflictException;
import org.neo4j.kernel.api.index.IndexAccessor;
import org.neo4j.kernel.api.index.IndexUpdater;
import org.neo4j.kernel.impl.api.index.IndexUpdateMode;
import org.neo4j.kernel.impl.index.schema.IndexDropAction;
import org.neo4j.storageengine.api.NodePropertyAccessor;
import org.neo4j.storageengine.api.schema.IndexReader;
import org.neo4j.storageengine.api.schema.StoreIndexDescriptor;
import org.neo4j.values.storable.Value;
import static org.neo4j.helpers.collection.Iterators.concatResourceIterators;
class FusionIndexAccessor extends FusionIndexBase<IndexAccessor> implements IndexAccessor
{
private final StoreIndexDescriptor descriptor;
private final IndexDropAction dropAction;
FusionIndexAccessor( SlotSelector slotSelector,
InstanceSelector<IndexAccessor> instanceSelector,
StoreIndexDescriptor descriptor,
IndexDropAction dropAction )
{
super( slotSelector, instanceSelector );
this.descriptor = descriptor;
this.dropAction = dropAction;
}
@Override
public void drop()
{
instanceSelector.forAll( IndexAccessor::drop );
dropAction.drop( descriptor.getId() );
}
@Override
public IndexUpdater newUpdater( IndexUpdateMode mode )
{
LazyInstanceSelector<IndexUpdater> updaterSelector = new LazyInstanceSelector<>( slot -> instanceSelector.select( slot ).newUpdater( mode ) );
return new FusionIndexUpdater( slotSelector, updaterSelector );
}
@Override
public void force( IOLimiter ioLimiter )
{
instanceSelector.forAll( accessor -> accessor.force( ioLimiter ) );
}
@Override
public void refresh()
{
instanceSelector.forAll( IndexAccessor::refresh );
}
@Override
public void close()
{
instanceSelector.close( IndexAccessor::close );
}
@Override
public IndexReader newReader()
{
LazyInstanceSelector<IndexReader> readerSelector = new LazyInstanceSelector<>( slot -> instanceSelector.select( slot ).newReader() );
return new FusionIndexReader( slotSelector, readerSelector, descriptor );
}
@Override
public BoundedIterable<Long> newAllEntriesReader()
{
Iterable<BoundedIterable<Long>> entries = instanceSelector.transform( IndexAccessor::newAllEntriesReader );
return new BoundedIterable<Long>()
{
@Override
public long maxCount()
{
long sum = 0;
for ( BoundedIterable entry : entries )
{
long maxCount = entry.maxCount();
if ( maxCount == UNKNOWN_MAX_COUNT )
{
return UNKNOWN_MAX_COUNT;
}
sum += maxCount;
}
return sum;
}
@SuppressWarnings( "unchecked" )
@Override
public void close() throws Exception
{
forAll( BoundedIterable::close, entries );
}
@Override
public Iterator<Long> iterator()
{
return Iterables.concat( entries ).iterator();
}
};
}
@Override
public ResourceIterator<File> snapshotFiles()
{
return concatResourceIterators( instanceSelector.transform( IndexAccessor::snapshotFiles ).iterator() );
}
@Override
public void verifyDeferredConstraints( NodePropertyAccessor nodePropertyAccessor ) throws IndexEntryConflictException
{
for ( IndexSlot slot : IndexSlot.values() )
{
instanceSelector.select( slot ).verifyDeferredConstraints( nodePropertyAccessor );
}
}
@Override
public boolean isDirty()
{
return Iterables.stream( instanceSelector.transform( IndexAccessor::isDirty ) ).anyMatch( Boolean::booleanValue );
}
@Override
public void validateBeforeCommit( Value[] tuple )
{
instanceSelector.select( slotSelector.selectSlot( tuple, GROUP_OF ) ).validateBeforeCommit( tuple );
}
}