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StandardStateMachineSPI.java
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StandardStateMachineSPI.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.bolt.v1.runtime.internal;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.function.Supplier;
import org.neo4j.bolt.security.auth.Authentication;
import org.neo4j.bolt.security.auth.AuthenticationException;
import org.neo4j.bolt.security.auth.AuthenticationResult;
import org.neo4j.bolt.v1.runtime.Session;
import org.neo4j.bolt.v1.runtime.spi.RecordStream;
import org.neo4j.bolt.v1.runtime.spi.StatementRunner;
import org.neo4j.concurrent.DecayingFlags;
import org.neo4j.kernel.api.KernelTransaction;
import org.neo4j.kernel.api.Statement;
import org.neo4j.kernel.api.bolt.SessionTracker;
import org.neo4j.kernel.api.exceptions.KernelException;
import org.neo4j.kernel.api.exceptions.TransactionFailureException;
import org.neo4j.kernel.api.security.AccessMode;
import org.neo4j.kernel.impl.core.ThreadToStatementContextBridge;
import org.neo4j.kernel.impl.logging.LogService;
import org.neo4j.kernel.impl.transaction.log.TransactionIdStore;
import org.neo4j.kernel.internal.GraphDatabaseAPI;
import org.neo4j.logging.Log;
import org.neo4j.udc.UsageData;
import org.neo4j.udc.UsageDataKeys;
class StandardStateMachineSPI implements SessionStateMachine.SPI
{
private final String connectionDescriptor;
private final UsageData usageData;
private final GraphDatabaseAPI db;
private final StatementRunner statementRunner;
private final ErrorReporter errorReporter;
private final Log log;
private final Authentication authentication;
private final Supplier<TransactionIdStore> transactionIdStore;
private final ThreadToStatementContextBridge txBridge;
private final DecayingFlags featureUsage;
private final SessionTracker sessionTracker;
StandardStateMachineSPI( String connectionDescriptor, UsageData usageData, GraphDatabaseAPI db,
StatementRunner statementRunner, LogService logging, Authentication authentication,
ThreadToStatementContextBridge txBridge, Supplier<TransactionIdStore> transactionIdStore,
SessionTracker sessionTracker )
{
this.connectionDescriptor = connectionDescriptor;
this.usageData = usageData;
this.db = db;
this.statementRunner = statementRunner;
this.txBridge = txBridge;
this.featureUsage = usageData.get( UsageDataKeys.features );
this.errorReporter = new ErrorReporter( logging );
this.log = logging.getInternalLog( SessionStateMachine.class );
this.authentication = authentication;
this.transactionIdStore = transactionIdStore;
this.sessionTracker = sessionTracker;
}
@Override
public String connectionDescriptor()
{
return connectionDescriptor;
}
@Override
public void reportError( Neo4jError err )
{
errorReporter.report( err );
}
@Override
public void reportError( String message, Throwable cause )
{
log.error( message, cause );
}
@Override
public KernelTransaction beginTransaction( KernelTransaction.Type type, AccessMode mode, VersionTracker versionTracker )
throws TransactionFailureException
{
versionTracker.assertUpToDate();
db.beginTransaction( type, mode );
KernelTransaction kernelTransaction = txBridge.getKernelTransactionBoundToThisThread( false );
kernelTransaction.registerCloseListener( versionTracker::updateVersion );
return kernelTransaction;
}
@Override
public void bindTransactionToCurrentThread( KernelTransaction tx )
{
txBridge.bindTransactionToCurrentThread( tx );
}
@Override
public void unbindTransactionFromCurrentThread()
{
txBridge.unbindTransactionFromCurrentThread();
}
@Override
public RecordStream run( SessionStateMachine ctx, String statement, Map<String,Object> params )
throws KernelException
{
featureUsage.flag( UsageDataKeys.Features.bolt );
return statementRunner.run( ctx, statement, params );
}
@Override
public AuthenticationResult authenticate( Map<String,Object> authToken ) throws AuthenticationException
{
return authentication.authenticate( authToken );
}
@Override
public void udcRegisterClient( String clientName )
{
usageData.get( UsageDataKeys.clientNames ).add( clientName );
}
@Override
public Statement currentStatement()
{
return txBridge.get();
}
@Override
public void sessionActivated( Session session )
{
sessionTracker.sessionActivated( session );
}
@Override
public void sessionHalted( Session session )
{
sessionTracker.sessionHalted( session );
}
public VersionTracker versionTracker( long startingVersion )
{
return new TransactionIdTracker( transactionIdStore, startingVersion, 30, TimeUnit.SECONDS );
}
}