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NativeSchemaNumberIndexUpdater.java
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NativeSchemaNumberIndexUpdater.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.kernel.impl.index.schema;
import java.io.IOException;
import org.neo4j.collection.primitive.PrimitiveLongSet;
import org.neo4j.index.internal.gbptree.Writer;
import org.neo4j.kernel.api.exceptions.index.IndexEntryConflictException;
import org.neo4j.kernel.api.index.IndexEntryUpdate;
import org.neo4j.kernel.api.index.IndexUpdater;
import org.neo4j.values.ValueTuple;
class NativeSchemaNumberIndexUpdater<KEY extends NumberKey, VALUE extends NumberValue>
implements IndexUpdater
{
private final KEY treeKey;
private final VALUE treeValue;
private final ConflictDetectingValueMerger<VALUE> conflictDetectingValueMerger;
private Writer<KEY,VALUE> writer;
private boolean closed = true;
private boolean manageClosingOfWriter;
NativeSchemaNumberIndexUpdater( KEY treeKey, VALUE treeValue )
{
this.treeKey = treeKey;
this.treeValue = treeValue;
this.conflictDetectingValueMerger = new ConflictDetectingValueMerger<VALUE>();
}
NativeSchemaNumberIndexUpdater<KEY,VALUE> initialize( Writer<KEY,VALUE> writer, boolean manageClosingOfWriter )
{
if ( !closed )
{
throw new IllegalStateException( "Updater still open" );
}
this.manageClosingOfWriter = manageClosingOfWriter;
this.writer = writer;
closed = false;
return this;
}
@Override
public void process( IndexEntryUpdate update ) throws IOException, IndexEntryConflictException
{
assertOpen();
processAdd( treeKey, treeValue, update, writer, conflictDetectingValueMerger );
}
@Override
public void close() throws IOException, IndexEntryConflictException
{
if ( manageClosingOfWriter )
{
writer.close();
}
closed = true;
}
@Override
public void remove( PrimitiveLongSet nodeIds ) throws IOException
{
assertOpen();
}
private void assertOpen()
{
if ( closed )
{
throw new IllegalStateException( "Updater has been closed" );
}
}
static <KEY extends NumberKey, VALUE extends NumberValue> void processAdd( KEY treeKey, VALUE treeValue,
IndexEntryUpdate update, Writer<KEY,VALUE> singleWriter,
ConflictDetectingValueMerger<VALUE> conflictDetectingValueMerger )
throws IOException, IndexEntryConflictException
{
treeKey.from( update.getEntityId(), update.values() );
treeValue.from( update.getEntityId(), update.values() );
singleWriter.merge( treeKey, treeValue, conflictDetectingValueMerger );
if ( conflictDetectingValueMerger.wasConflict() )
{
long existingNodeId = conflictDetectingValueMerger.existingNodeId();
long addedNodeId = conflictDetectingValueMerger.addedNodeId();
throw new IndexEntryConflictException( existingNodeId, addedNodeId, ValueTuple.of( update.values() ) );
}
}
}