protected void execute(String queryString, HttpAction action) {
String queryStringLog = ServletOps.formatForLog(queryString);
if (action.verbose) action.log.info(format("[%d] Query = \n%s", action.id, queryString));
else action.log.info(format("[%d] Query = %s", action.id, queryStringLog));
Query query = null;
try {
// NB syntax is ARQ (a superset of SPARQL)
query = QueryFactory.create(queryString, QueryParseBase, Syntax.syntaxARQ);
queryStringLog = formatForLog(query);
validateQuery(action, query);
} catch (ActionErrorException ex) {
throw ex;
} catch (QueryParseException ex) {
ServletOps.errorBadRequest(
"Parse error: \n" + queryString + "\n\r" + messageForQueryException(ex));
}
// Should not happen.
catch (QueryException ex) {
ServletOps.errorBadRequest("Error: \n" + queryString + "\n\r" + ex.getMessage());
}
// Assumes finished whole thing by end of sendResult.
try {
action.beginRead();
Dataset dataset = decideDataset(action, query, queryStringLog);
try (QueryExecution qExec = createQueryExecution(query, dataset); ) {
SPARQLResult result = executeQuery(action, qExec, query, queryStringLog);
// Deals with exceptions itself.
sendResults(action, result, query.getPrologue());
}
} catch (QueryParseException ex) {
// Late stage static error (e.g. bad fixed Lucene query string).
ServletOps.errorBadRequest(
"Query parse error: \n" + queryString + "\n\r" + messageForQueryException(ex));
} catch (QueryCancelledException ex) {
// Additional counter information.
incCounter(action.getEndpoint().getCounters(), QueryTimeouts);
throw ex;
} finally {
action.endRead();
}
}
