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IndexAccessors.java
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IndexAccessors.java
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/*
* Copyright (c) 2002-2016 "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.legacy.consistency.checking.index;
import java.io.Closeable;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.neo4j.kernel.api.index.IndexAccessor;
import org.neo4j.kernel.api.index.IndexConfiguration;
import org.neo4j.kernel.api.index.InternalIndexState;
import org.neo4j.kernel.api.index.SchemaIndexProvider;
import org.neo4j.kernel.impl.api.index.sampling.IndexSamplingConfig;
import org.neo4j.kernel.impl.store.RecordStore;
import org.neo4j.kernel.impl.store.record.DynamicRecord;
import org.neo4j.kernel.impl.store.record.IndexRule;
import static org.neo4j.legacy.consistency.checking.schema.IndexRules.loadAllIndexRules;
public class IndexAccessors implements Closeable
{
private final Map<Long,IndexAccessor> accessors = new HashMap<>();
private final List<IndexRule> indexRules = new ArrayList<>();
public IndexAccessors( SchemaIndexProvider provider,
RecordStore<DynamicRecord> schemaStore,
IndexSamplingConfig samplingConfig ) throws IOException
{
Iterator<IndexRule> rules = loadAllIndexRules( schemaStore ).iterator();
for (; ; )
{
try
{
if ( rules.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
IndexRule indexRule = rules.next();
if ( InternalIndexState.ONLINE == provider.getInitialState( indexRule.getId() ) )
{
indexRules.add( indexRule );
}
}
else
{
break;
}
}
catch ( Exception e )
{
// ignore; inconsistencies of the schema store are specifically handled elsewhere.
}
}
for ( IndexRule indexRule : indexRules )
{
long indexId = indexRule.getId();
IndexConfiguration indexConfig = IndexConfiguration.of( indexRule );
accessors.put( indexId, provider.getOnlineAccessor( indexId, indexConfig, samplingConfig ) );
}
}
public IndexAccessor accessorFor(IndexRule indexRule)
{
return accessors.get( indexRule.getId() );
}
// TODO: return pair of rules and accessor
public Iterable<IndexRule> rules()
{
return indexRules;
}
@Override
public void close() throws IOException
{
for ( IndexAccessor accessor : accessors.values() )
{
accessor.close();
}
accessors.clear();
indexRules.clear();
}
}