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StoreStatements.java
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StoreStatements.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.kernel.impl.storageengine.impl.recordstorage;
import java.util.function.Supplier;
import org.neo4j.collection.pool.MarshlandPool;
import org.neo4j.function.Factory;
import org.neo4j.kernel.impl.api.IndexReaderFactory;
import org.neo4j.kernel.impl.api.store.StoreStatement;
import org.neo4j.kernel.impl.locking.LockService;
import org.neo4j.kernel.impl.store.NeoStores;
import org.neo4j.storageengine.api.StorageStatement;
import org.neo4j.storageengine.api.schema.LabelScanReader;
/**
* {@link Supplier} of {@link StoreStatement} instances for {@link RecordStorageEngine}.
* Internally uses pooling to reduce need for actual instantiation.
*/
public class StoreStatements implements Supplier<StorageStatement>, AutoCloseable
{
private final NeoStores neoStores;
private final LockService lockService;
private final Supplier<IndexReaderFactory> indexReaderFactory;
private final Supplier<LabelScanReader> labelScanReader;
private final Factory<StoreStatement> factory = new Factory<StoreStatement>()
{
@Override
public StoreStatement newInstance()
{
return new StoreStatement( neoStores, lockService, indexReaderFactory, labelScanReader, pool );
}
};
private final MarshlandPool<StoreStatement> pool = new MarshlandPool<>( factory );
public StoreStatements( NeoStores neoStores, LockService lockService,
Supplier<IndexReaderFactory> indexReaderFactory, Supplier<LabelScanReader> labelScanReader )
{
this.neoStores = neoStores;
this.lockService = lockService;
this.indexReaderFactory = indexReaderFactory;
this.labelScanReader = labelScanReader;
}
@Override
public StorageStatement get()
{
return pool.acquire().initialize();
}
@Override
public void close()
{
pool.close();
}
}