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TransactionRepresentationStoreApplier.java
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TransactionRepresentationStoreApplier.java
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/*
* Copyright (c) 2002-2015 "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;
import java.io.IOException;
import org.neo4j.concurrent.WorkSync;
import org.neo4j.helpers.Provider;
import org.neo4j.kernel.KernelHealth;
import org.neo4j.kernel.impl.api.index.IndexingService;
import org.neo4j.kernel.impl.api.index.ValidatedIndexUpdates;
import org.neo4j.kernel.impl.core.CacheAccessBackDoor;
import org.neo4j.kernel.impl.index.IndexConfigStore;
import org.neo4j.kernel.impl.locking.LockGroup;
import org.neo4j.kernel.impl.locking.LockService;
import org.neo4j.kernel.impl.store.NeoStore;
import org.neo4j.kernel.impl.transaction.TransactionRepresentation;
import org.neo4j.kernel.impl.transaction.command.CacheInvalidationTransactionApplier;
import org.neo4j.kernel.impl.transaction.command.HighIdTransactionApplier;
import org.neo4j.kernel.impl.transaction.command.IndexTransactionApplier;
import org.neo4j.kernel.impl.transaction.command.NeoCommandHandler;
import org.neo4j.kernel.impl.transaction.command.NeoStoreTransactionApplier;
import org.neo4j.kernel.impl.util.IdOrderingQueue;
import org.neo4j.kernel.impl.util.function.Optional;
import org.neo4j.unsafe.batchinsert.LabelScanWriter;
/**
* Holistic application of {@link TransactionRepresentation transactions} onto the store. Includes application
* for the graph store, schema indexes and legacy indexes. It's expected that there's only one instance
* of this type for any given database.
*/
public class TransactionRepresentationStoreApplier
{
private final NeoStore neoStore;
protected final IndexingService indexingService;
private final CacheAccessBackDoor cacheAccess;
private final LockService lockService;
private final Provider<LabelScanWriter> labelScanWriters;
private final IndexConfigStore indexConfigStore;
private final LegacyIndexApplierLookup legacyIndexProviderLookup;
protected final KernelHealth health;
private final IdOrderingQueue legacyIndexTransactionOrdering;
private final WorkSync<Provider<LabelScanWriter>,IndexTransactionApplier.LabelUpdateWork> labelScanStoreSync;
public TransactionRepresentationStoreApplier(
IndexingService indexingService, Provider<LabelScanWriter> labelScanWriters, NeoStore neoStore,
CacheAccessBackDoor cacheAccess, LockService lockService, LegacyIndexApplierLookup
legacyIndexProviderLookup,
IndexConfigStore indexConfigStore, KernelHealth health, IdOrderingQueue legacyIndexTransactionOrdering )
{
this.indexingService = indexingService;
this.labelScanWriters = labelScanWriters;
this.neoStore = neoStore;
this.cacheAccess = cacheAccess;
this.lockService = lockService;
this.legacyIndexProviderLookup = legacyIndexProviderLookup;
this.indexConfigStore = indexConfigStore;
this.health = health;
this.legacyIndexTransactionOrdering = legacyIndexTransactionOrdering;
labelScanStoreSync = new WorkSync<>( labelScanWriters );
}
public void apply( TransactionRepresentation representation, ValidatedIndexUpdates indexUpdates, LockGroup locks,
long transactionId, TransactionApplicationMode mode ) throws IOException
{
// Graph store application. The order of the decorated store appliers is irrelevant
NeoCommandHandler storeApplier = new NeoStoreTransactionApplier(
neoStore, cacheAccess, lockService, locks, transactionId );
if ( mode.needsIdTracking() )
{
storeApplier = new HighIdTransactionApplier( storeApplier, neoStore );
}
if ( mode.needsCacheInvalidationOnUpdates() )
{
storeApplier = new CacheInvalidationTransactionApplier( storeApplier, neoStore, cacheAccess );
}
// Schema index application
IndexTransactionApplier indexApplier = new IndexTransactionApplier( indexingService, indexUpdates,
labelScanStoreSync, cacheAccess );
// Legacy index application
LegacyIndexApplier legacyIndexApplier = new LegacyIndexApplier( indexConfigStore,
legacyIndexProviderLookup, legacyIndexTransactionOrdering, transactionId, mode );
// Counts store application
NeoCommandHandler countsStoreApplier = getCountsStoreApplier( transactionId, mode );
// Perform the application
try ( CommandApplierFacade applier = new CommandApplierFacade(
storeApplier, indexApplier, legacyIndexApplier, countsStoreApplier ) )
{
representation.accept( applier );
}
catch ( Throwable cause )
{
health.panic( cause );
throw cause;
}
}
private NeoCommandHandler getCountsStoreApplier( long transactionId, TransactionApplicationMode mode )
{
Optional<NeoCommandHandler> handlerOption =
neoStore.getCounts().apply( transactionId ).map( CountsStoreApplier.FACTORY );
if ( mode == TransactionApplicationMode.RECOVERY )
{
handlerOption = handlerOption.or( NeoCommandHandler.EMPTY );
}
return handlerOption.get();
}
public TransactionRepresentationStoreApplier withLegacyIndexTransactionOrdering(
IdOrderingQueue legacyIndexTransactionOrdering )
{
return new TransactionRepresentationStoreApplier( indexingService, labelScanWriters, neoStore, cacheAccess,
lockService, legacyIndexProviderLookup, indexConfigStore, health, legacyIndexTransactionOrdering );
}
}