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Add sparql timeout #9

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Add sparql timeout #9

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3a96d83
fix: add timeout sparql timeout
mosoriob Aug 5, 2022
4d165b7
fix: missing handle
mosoriob Aug 5, 2022
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41 changes: 39 additions & 2 deletions src/main/java/edu/isi/kcap/ontapi/jena/KBAPIJena.java
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Original file line number Diff line number Diff line change
Expand Up @@ -657,11 +657,13 @@ public ArrayList<ArrayList<SparqlQuerySolution>> sparqlQueryRemote(String queryS
return list;
}

public ArrayList<ArrayList<SparqlQuerySolution>> sparqlQuery(String queryString) {
public ArrayList<ArrayList<SparqlQuerySolution>> sparqlQuery(String queryString) {
Integer timeOut = 1000 * 60 * 5; //default timeout is 5 minutes
ArrayList<ArrayList<SparqlQuerySolution>> list = new ArrayList<ArrayList<SparqlQuerySolution>>();
Query query = QueryFactory.create(queryString);
ArrayList<String> vars = new ArrayList<String>(query.getResultVars());
QueryExecution qexec = QueryExecutionFactory.create(query, ontmodel);
qexec.setTimeout(timeOut);
try {
ResultSet results = qexec.execSelect();
for (; results.hasNext();) {
Expand All @@ -679,13 +681,48 @@ public ArrayList<ArrayList<SparqlQuerySolution>> sparqlQuery(String queryString)
}
list.add(inner);
}

}
catch(QueryCancelledException e){
System.out.println("Query cancelled");
throw e;
} finally {
qexec.close();
}
return list;
}

public ArrayList<ArrayList<SparqlQuerySolution>> sparqlQuery(String queryString, int timeOut) {
ArrayList<ArrayList<SparqlQuerySolution>> list = new ArrayList<ArrayList<SparqlQuerySolution>>();
Query query = QueryFactory.create(queryString);
ArrayList<String> vars = new ArrayList<String>(query.getResultVars());
QueryExecution qexec = QueryExecutionFactory.create(query, ontmodel);
qexec.setTimeout(timeOut);
try {
ResultSet results = qexec.execSelect();
for (; results.hasNext();) {
QuerySolution soln = results.nextSolution();
ArrayList<SparqlQuerySolution> inner = new ArrayList<SparqlQuerySolution>();
for (String variableName : vars) {
RDFNode x = soln.get(variableName);
// System.out.println(soln.toString());
KBObject item = null;
if (x != null)
item = new KBObjectJena(x);

SparqlQuerySolution sqs = new SparqlQuerySolution(variableName, item);
inner.add(sqs);
}
list.add(inner);
}
}
catch(QueryCancelledException e){
System.out.println("Query cancelled");
throw e;
} finally {
qexec.close();
}
return list;
}
public ArrayList<KBObject> getSubClasses(KBObject cls, boolean direct_only) {
ArrayList<KBObject> list = new ArrayList<KBObject>();
OntClass cl = (OntClass) cls.getInternalNode();
Expand Down