/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jena.query.spatial;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.hp.hpl.jena.graph.Graph;
import com.hp.hpl.jena.graph.Node;
import com.hp.hpl.jena.query.ReadWrite;
import com.hp.hpl.jena.sparql.core.DatasetGraph;
import com.hp.hpl.jena.sparql.core.DatasetGraphMonitor;
import com.hp.hpl.jena.sparql.core.DatasetGraphWithLock;
import com.hp.hpl.jena.sparql.core.GraphView;
import com.hp.hpl.jena.sparql.core.Transactional;
public class DatasetGraphSpatial extends DatasetGraphMonitor implements Transactional
{
private static Logger log = LoggerFactory.getLogger(DatasetGraphSpatial.class) ;
private final SpatialIndex spatialIndex ;
private final Transactional dsgtxn ;
public DatasetGraphSpatial(DatasetGraph dsg, SpatialIndex index, SpatialDocProducer producer)
{
super(dsg, producer) ;
this.spatialIndex = index ;
if ( dsg instanceof Transactional )
dsgtxn = (Transactional)dsg ;
else
dsgtxn = new DatasetGraphWithLock(dsg) ;
}
// public DatasetGraph getBase() { return getWrapped() ; }
// ---- Intecept these and force the use of views.
@Override
public Graph getDefaultGraph()
{ return GraphView.createDefaultGraph(this) ; }
@Override
public Graph getGraph(Node graphNode)
{ return GraphView.createNamedGraph(this, graphNode) ; }
// ----
public SpatialIndex getSpatialIndex()
{
return spatialIndex;
}
// Imperfect.
private boolean needFinish = false ;
@Override
public void begin(ReadWrite readWrite)
{
dsgtxn.begin(readWrite) ;
//textIndex.begin(readWrite) ;
if ( readWrite == ReadWrite.WRITE )
{
// WRONG design
super.getMonitor().start() ;
// Right design.
//textIndex.startIndexing() ;
needFinish = true ;
}
}
@Override
public void commit()
{
try {
if ( needFinish )
{
super.getMonitor().finish() ;
//spatialIndex.finishIndexing() ;
}
needFinish = false ;
//spatialIndex.commit() ;
dsgtxn.commit() ;
} catch (Throwable ex) {
log.warn("Exception in commit: "+ex.getMessage(), ex) ;
dsgtxn.abort() ;
}
}
@Override
public void abort()
{
try {
if ( needFinish )
spatialIndex.abortIndexing() ;
//spatialIndex.abort() ;
dsgtxn.abort() ;
} catch (Throwable ex) { log.warn("Exception in abort: "+ex.getMessage(), ex) ; }
}
@Override
public boolean isInTransaction()
{
return dsgtxn.isInTransaction() ;
}
@Override
public void end()
{
try {
//spatialIndex.end() ;
dsgtxn.end() ;
} catch (Throwable ex) { log.warn("Exception in end: "+ex.getMessage(), ex) ; }
}
}