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ProcedureGDBFacadeSPI.java
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ProcedureGDBFacadeSPI.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.proc;
import java.io.File;
import java.net.URL;
import java.util.Map;
import java.util.function.Supplier;
import org.neo4j.function.ThrowingFunction;
import org.neo4j.graphdb.DependencyResolver;
import org.neo4j.graphdb.Result;
import org.neo4j.graphdb.event.KernelEventHandler;
import org.neo4j.graphdb.event.TransactionEventHandler;
import org.neo4j.graphdb.security.URLAccessValidationError;
import org.neo4j.kernel.GraphDatabaseQueryService;
import org.neo4j.kernel.api.KernelTransaction;
import org.neo4j.kernel.api.Statement;
import org.neo4j.kernel.api.legacyindex.AutoIndexing;
import org.neo4j.kernel.api.security.AccessMode;
import org.neo4j.kernel.impl.coreapi.CoreAPIAvailabilityGuard;
import org.neo4j.kernel.impl.factory.GraphDatabaseFacade;
import org.neo4j.kernel.impl.query.QueryExecutionEngine;
import org.neo4j.kernel.impl.query.QueryExecutionKernelException;
import org.neo4j.kernel.impl.query.QuerySession;
import org.neo4j.kernel.impl.store.StoreId;
class ProcedureGDBFacadeSPI implements GraphDatabaseFacade.SPI
{
private final Thread transactionThread;
private final KernelTransaction transaction;
private final Supplier<QueryExecutionEngine> queryExecutor;
private final DependencyResolver resolver;
private final AutoIndexing autoIndexing;
private final Supplier<StoreId> storeId;
private final CoreAPIAvailabilityGuard availability;
private final ThrowingFunction<URL,URL,URLAccessValidationError> urlValidator;
private final File storeDir;
public ProcedureGDBFacadeSPI( Thread transactionThread, KernelTransaction transaction, Supplier<QueryExecutionEngine> queryExecutor,
File storeDir, DependencyResolver resolver, AutoIndexing autoIndexing,
Supplier<StoreId> storeId, CoreAPIAvailabilityGuard availability,
ThrowingFunction<URL,URL,URLAccessValidationError> urlValidator )
{
this.transactionThread = transactionThread;
this.transaction = transaction;
this.queryExecutor = queryExecutor;
this.storeDir = storeDir;
this.resolver = resolver;
this.autoIndexing = autoIndexing;
this.storeId = storeId;
this.availability = availability;
this.urlValidator = urlValidator;
}
@Override
public boolean databaseIsAvailable( long timeout )
{
return availability.isAvailable( timeout );
}
@Override
public DependencyResolver resolver()
{
return resolver;
}
@Override
public StoreId storeId()
{
return storeId.get();
}
@Override
public File storeDir()
{
return storeDir;
}
@Override
public String name()
{
return "ProcedureGraphDatabaseService";
}
private void assertSameThread()
{
if ( transactionThread != Thread.currentThread() )
{
throw new UnsupportedOperationException( "Creating new transactions and/or spawning threads are " +
"not supported operations in store procedures." );
}
}
@Override
public KernelTransaction currentTransaction()
{
availability.assertDatabaseAvailable();
assertSameThread();
return transaction;
}
@Override
public boolean isInOpenTransaction()
{
assertSameThread();
return transaction.isOpen();
}
@Override
public Statement currentStatement()
{
assertSameThread();
return transaction.acquireStatement();
}
@Override
public Result executeQuery( String query, Map<String,Object> parameters, QuerySession querySession )
{
try
{
availability.assertDatabaseAvailable();
assertSameThread();
return queryExecutor.get().executeQuery( query, parameters, querySession );
}
catch ( QueryExecutionKernelException e )
{
throw e.asUserException();
}
}
@Override
public AutoIndexing autoIndexing()
{
return autoIndexing;
}
@Override
public void registerKernelEventHandler( KernelEventHandler handler )
{
throw new UnsupportedOperationException();
}
@Override
public void unregisterKernelEventHandler( KernelEventHandler handler )
{
throw new UnsupportedOperationException();
}
@Override
public <T> void registerTransactionEventHandler( TransactionEventHandler<T> handler )
{
throw new UnsupportedOperationException();
}
@Override
public <T> void unregisterTransactionEventHandler( TransactionEventHandler<T> handler )
{
throw new UnsupportedOperationException();
}
@Override
public URL validateURLAccess( URL url ) throws URLAccessValidationError
{
return urlValidator.apply( url );
}
@Override
public GraphDatabaseQueryService queryService()
{
return queryExecutor.get().queryService();
}
@Override
public void shutdown()
{
throw new UnsupportedOperationException();
}
@Override
public KernelTransaction beginTransaction( KernelTransaction.Type type, AccessMode accessMode )
{
throw new UnsupportedOperationException();
}
@Override
public KernelTransaction beginTransaction( KernelTransaction.Type type, AccessMode accessMode, long timeout )
{
throw new UnsupportedOperationException();
}
}