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NIHVIVO-2079 consuming ResultSet iterators before dataset wrappers are closed

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bjl23 2011-02-09 14:36:38 +00:00
parent 0ed2c4ece5
commit f0b1a73cff
3 changed files with 16 additions and 4 deletions
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2
webapp/src/edu/cornell/mannlib/vitro/webapp/dao/jena/DataPropertyDaoJena.java
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@ -755,7 +755,7 @@ public class DataPropertyDaoJena extends PropertyDaoJena implements
public List<DataProperty> getDataPropertyList(String subjectUri) {
log.debug("Data property query string:\n" + DATA_PROPERTY_QUERY_STRING);
log.debug("Data property query:\n" + dataPropertyQuery);
ResultSet results = getPropertyQueryResults(subjectUri, dataPropertyQuery);
Iterator<QuerySolution> results = getPropertyQueryResults(subjectUri, dataPropertyQuery);
List<DataProperty> properties = new ArrayList<DataProperty>();
while (results.hasNext()) {
QuerySolution sol = results.next();

2
webapp/src/edu/cornell/mannlib/vitro/webapp/dao/jena/ObjectPropertyDaoJena.java
View file

@ -886,7 +886,7 @@ public class ObjectPropertyDaoJena extends PropertyDaoJena implements ObjectProp
public List<ObjectProperty> getObjectPropertyList(String subjectUri) {
log.debug("Object property query string:\n" + OBJECT_PROPERTY_QUERY_STRING);
log.debug("Object property query:\n" + objectPropertyQuery);
ResultSet results = getPropertyQueryResults(subjectUri, objectPropertyQuery);
Iterator<QuerySolution> results = getPropertyQueryResults(subjectUri, objectPropertyQuery);
List<ObjectProperty> properties = new ArrayList<ObjectProperty>();
while (results.hasNext()) {
QuerySolution soln = results.next();

16
webapp/src/edu/cornell/mannlib/vitro/webapp/dao/jena/PropertyDaoJena.java
View file

@ -20,6 +20,7 @@ import com.hp.hpl.jena.query.Dataset;
import com.hp.hpl.jena.query.Query;
import com.hp.hpl.jena.query.QueryExecution;
import com.hp.hpl.jena.query.QueryExecutionFactory;
import com.hp.hpl.jena.query.QuerySolution;
import com.hp.hpl.jena.query.QuerySolutionMap;
import com.hp.hpl.jena.query.ResultSet;
import com.hp.hpl.jena.rdf.model.RDFNode;
@ -401,7 +402,7 @@ public class PropertyDaoJena extends JenaBaseDao implements PropertyDao {
return classSet;
}
protected ResultSet getPropertyQueryResults(String subjectUri, Query query) {
protected Iterator<QuerySolution> getPropertyQueryResults(String subjectUri, Query query) {
log.debug("SPARQL query:\n" + query.toString());
// Bind the subject's uri to the ?subject query term
QuerySolutionMap subjectBinding = new QuerySolutionMap();
@ -409,13 +410,24 @@ public class PropertyDaoJena extends JenaBaseDao implements PropertyDao {
ResourceFactory.createResource(subjectUri));
// Run the SPARQL query to get the properties
System.out.println(dwf.getClass().getName());
DatasetWrapper w = dwf.getDatasetWrapper();
Dataset dataset = w.getDataset();
dataset.getLock().enterCriticalSection(Lock.READ);
try {
QueryExecution qexec = QueryExecutionFactory.create(
query, dataset, subjectBinding);
return qexec.execSelect();
try {
ResultSet rs = qexec.execSelect();
// consume iterator before wrapper w is closed in finally block
List<QuerySolution> results = new ArrayList<QuerySolution>();
while (rs.hasNext()) {
results.add(rs.next());
}
return results.iterator();
} finally {
qexec.close();
}
} finally {
dataset.getLock().leaveCriticalSection();
w.close();