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HighlyAvailableCommitProcessFactory.java
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HighlyAvailableCommitProcessFactory.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 Affero 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.kernel.ha.factory;
import org.neo4j.graphdb.factory.GraphDatabaseSettings;
import org.neo4j.kernel.configuration.Config;
import org.neo4j.kernel.ha.DelegateInvocationHandler;
import org.neo4j.kernel.ha.cluster.modeswitch.CommitProcessSwitcher;
import org.neo4j.kernel.ha.cluster.modeswitch.ComponentSwitcherContainer;
import org.neo4j.kernel.ha.com.RequestContextFactory;
import org.neo4j.kernel.ha.com.master.Master;
import org.neo4j.kernel.ha.transaction.TransactionPropagator;
import org.neo4j.kernel.impl.api.CommitProcessFactory;
import org.neo4j.kernel.impl.api.ReadOnlyTransactionCommitProcess;
import org.neo4j.kernel.impl.api.TransactionCommitProcess;
import org.neo4j.kernel.impl.api.TransactionRepresentationCommitProcess;
import org.neo4j.kernel.impl.api.TransactionRepresentationStoreApplier;
import org.neo4j.kernel.impl.api.index.IndexUpdatesValidator;
import org.neo4j.kernel.impl.transaction.log.TransactionAppender;
import org.neo4j.kernel.impl.transaction.state.IntegrityValidator;
import static java.lang.reflect.Proxy.newProxyInstance;
class HighlyAvailableCommitProcessFactory implements CommitProcessFactory
{
private final ComponentSwitcherContainer componentSwitcherContainer;
private final Master master;
private final TransactionPropagator transactionPropagator;
private final RequestContextFactory requestContextFactory;
private final DelegateInvocationHandler<TransactionCommitProcess> commitProcessDelegate =
new DelegateInvocationHandler<>( TransactionCommitProcess.class );
HighlyAvailableCommitProcessFactory( ComponentSwitcherContainer componentSwitcherContainer, Master master,
TransactionPropagator transactionPropagator, RequestContextFactory requestContextFactory )
{
this.componentSwitcherContainer = componentSwitcherContainer;
this.master = master;
this.transactionPropagator = transactionPropagator;
this.requestContextFactory = requestContextFactory;
}
@Override
public TransactionCommitProcess create( TransactionAppender appender,
TransactionRepresentationStoreApplier storeApplier, IntegrityValidator integrityValidator,
IndexUpdatesValidator indexUpdatesValidator, Config config )
{
if ( config.get( GraphDatabaseSettings.read_only ) )
{
return new ReadOnlyTransactionCommitProcess();
}
TransactionCommitProcess commitProcess = new TransactionRepresentationCommitProcess( appender, storeApplier,
indexUpdatesValidator );
CommitProcessSwitcher commitProcessSwitcher = new CommitProcessSwitcher( transactionPropagator,
master, commitProcessDelegate, requestContextFactory, integrityValidator, commitProcess );
componentSwitcherContainer.add( commitProcessSwitcher );
return (TransactionCommitProcess) newProxyInstance( TransactionCommitProcess.class.getClassLoader(),
new Class[]{TransactionCommitProcess.class}, commitProcessDelegate );
}
}