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IndexAccessors.java
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IndexAccessors.java
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/*
* Copyright (c) 2002-2018 "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.consistency.checking.index;
import org.eclipse.collections.api.map.primitive.MutableLongObjectMap;
import org.eclipse.collections.impl.map.mutable.primitive.LongObjectHashMap;
import java.io.Closeable;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import org.neo4j.internal.kernel.api.InternalIndexState;
import org.neo4j.kernel.api.index.IndexAccessor;
import org.neo4j.kernel.api.index.IndexProvider;
import org.neo4j.kernel.impl.api.index.IndexProviderMap;
import org.neo4j.kernel.impl.api.index.sampling.IndexSamplingConfig;
import org.neo4j.kernel.impl.store.RecordStore;
import org.neo4j.kernel.impl.store.SchemaStorage;
import org.neo4j.kernel.impl.store.record.DynamicRecord;
import org.neo4j.kernel.api.schema.index.StoreIndexDescriptor;
public class IndexAccessors implements Closeable
{
private final MutableLongObjectMap<IndexAccessor> accessors = new LongObjectHashMap<>();
private final List<StoreIndexDescriptor> onlineIndexRules = new ArrayList<>();
private final List<StoreIndexDescriptor> notOnlineIndexRules = new ArrayList<>();
public IndexAccessors( IndexProviderMap providers,
RecordStore<DynamicRecord> schemaStore,
IndexSamplingConfig samplingConfig ) throws IOException
{
Iterator<StoreIndexDescriptor> indexes = new SchemaStorage( schemaStore ).indexesGetAll();
for (; ; )
{
try
{
if ( indexes.hasNext() )
{
// we intentionally only check indexes that are online since
// - populating indexes will be rebuilt on next startup
// - failed indexes have to be dropped by the user anyways
StoreIndexDescriptor indexDescriptor = indexes.next();
if ( indexDescriptor.isIndexWithoutOwningConstraint() )
{
notOnlineIndexRules.add( indexDescriptor );
}
else
{
if ( InternalIndexState.ONLINE ==
provider( providers, indexDescriptor ).getInitialState( indexDescriptor ) )
{
onlineIndexRules.add( indexDescriptor );
}
else
{
notOnlineIndexRules.add( indexDescriptor );
}
}
}
else
{
break;
}
}
catch ( Exception e )
{
// ignore; inconsistencies of the schema store are specifically handled elsewhere.
}
}
for ( StoreIndexDescriptor indexRule : onlineIndexRules )
{
long indexId = indexRule.getId();
accessors.put( indexId, provider( providers, indexRule )
.getOnlineAccessor( indexRule, samplingConfig ) );
}
}
private IndexProvider provider( IndexProviderMap providers, StoreIndexDescriptor indexRule )
{
return providers.apply( indexRule.providerDescriptor() );
}
public Collection<StoreIndexDescriptor> notOnlineRules()
{
return notOnlineIndexRules;
}
public IndexAccessor accessorFor( StoreIndexDescriptor indexRule )
{
return accessors.get( indexRule.getId() );
}
public Iterable<StoreIndexDescriptor> onlineRules()
{
return onlineIndexRules;
}
@Override
public void close() throws IOException
{
for ( IndexAccessor accessor : accessors )
{
accessor.close();
}
accessors.clear();
onlineIndexRules.clear();
notOnlineIndexRules.clear();
}
}