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IndexMapReference.java
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IndexMapReference.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.api.index;
import org.neo4j.collection.primitive.PrimitiveIntCollection;
import org.neo4j.kernel.api.exceptions.index.IndexNotFoundKernelException;
import org.neo4j.kernel.api.schema_new.LabelSchemaDescriptor;
public class IndexMapReference implements IndexMapSnapshotProvider
{
private volatile IndexMap indexMap = new IndexMap();
@Override
public IndexMap indexMapSnapshot()
{
return indexMap.clone();
}
public IndexProxy getIndexProxy( long indexId ) throws IndexNotFoundKernelException
{
IndexProxy proxy = indexMap.getIndexProxy( indexId );
if ( proxy == null )
{
throw new IndexNotFoundKernelException( "No index for index id " + indexId + " exists." );
}
return proxy;
}
public IndexProxy getIndexProxy( LabelSchemaDescriptor descriptor ) throws IndexNotFoundKernelException
{
IndexProxy proxy = indexMap.getIndexProxy( descriptor );
if ( proxy == null )
{
throw new IndexNotFoundKernelException( "No index for " + descriptor + " exists." );
}
return proxy;
}
public long getIndexId( LabelSchemaDescriptor descriptor ) throws IndexNotFoundKernelException
{
IndexProxy proxy = indexMap.getIndexProxy( descriptor );
if ( proxy == null )
{
throw new IndexNotFoundKernelException( "No index for " + descriptor + " exists." );
}
return indexMap.getIndexId( descriptor );
}
public long getOnlineIndexId( LabelSchemaDescriptor descriptor ) throws IndexNotFoundKernelException
{
IndexProxy proxy = getIndexProxy( descriptor );
switch ( proxy.getState() )
{
case ONLINE:
return indexMap.getIndexId( descriptor );
default:
throw new IndexNotFoundKernelException( "Expected index on " + descriptor + " to be online.");
}
}
public Iterable<IndexProxy> getAllIndexProxies()
{
return indexMap.getAllIndexProxies();
}
public Iterable<LabelSchemaDescriptor> getRelatedIndexes(
long[] changedLabels, long[] unchangedLabels, PrimitiveIntCollection properties )
{
return indexMap.getRelatedIndexes( changedLabels, unchangedLabels, properties );
}
public void setIndexMap( IndexMap newIndexMap )
{
// ASSUMPTION: Only called at shutdown or during commit (single-threaded in each case)
indexMap = newIndexMap;
}
public IndexProxy removeIndexProxy( long indexId )
{
// ASSUMPTION: Only called at shutdown or during commit (single-threaded in each case)
IndexMap newIndexMap = indexMapSnapshot();
IndexProxy indexProxy = newIndexMap.removeIndexProxy( indexId );
setIndexMap( newIndexMap );
return indexProxy;
}
public Iterable<IndexProxy> clear()
{
// ASSUMPTION: Only called at shutdown when there are no other calls to setIndexMap
IndexMap oldIndexMap = indexMap;
setIndexMap( new IndexMap() );
return oldIndexMap.getAllIndexProxies();
}
public IndexUpdaterMap createIndexUpdaterMap( IndexUpdateMode mode )
{
return new IndexUpdaterMap( indexMap, mode );
}
}