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better error messages if remote SPARQL endpoint is unavailable

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This commit is contained in:
brianjlowe 2012-06-25 20:57:52 +00:00
parent fab1555cdb
commit dcfc32803c
2 changed files with 18 additions and 0 deletions
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15
webapp/src/edu/cornell/mannlib/vitro/webapp/rdfservice/impl/sparql/RDFServiceSparql.java
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@ -10,6 +10,7 @@ import java.util.ArrayList;
import java.util.Iterator; import java.util.Iterator;
import java.util.List; import java.util.List;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.io.IOUtils; import org.apache.commons.io.IOUtils;
import org.apache.commons.logging.Log; import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory; import org.apache.commons.logging.LogFactory;
@ -77,6 +78,20 @@ public class RDFServiceSparql extends RDFServiceImpl implements RDFService {
this.updateEndpointURI = updateEndpointURI; this.updateEndpointURI = updateEndpointURI;
this.readRepository = new HTTPRepository(readEndpointURI); this.readRepository = new HTTPRepository(readEndpointURI);
this.updateRepository = new HTTPRepository(updateEndpointURI); this.updateRepository = new HTTPRepository(updateEndpointURI);
testConnection();
}
private void testConnection() {
try {
this.sparqlSelectQuery(
"SELECT ?s WHERE { ?s a " +
"<http://vitro.mannlib.cornell.edu/ns/vitro/nonsense/> }",
RDFService.ResultFormat.JSON);
} catch (Exception e) {
throw new RuntimeException("Unable to connect to endpoint at " +
readEndpointURI, e);
}
} }
/** /**

3
webapp/src/edu/cornell/mannlib/vitro/webapp/servlet/setup/WebappDaoSetup.java
View file

@ -133,6 +133,7 @@ public class WebappDaoSetup extends JenaDataSourceSetupBase
baseOms.setTBoxModel(tboxAssertions); baseOms.setTBoxModel(tboxAssertions);
} catch (Throwable e) { } catch (Throwable e) {
log.error("Unable to load tbox assertion cache from DB", e); log.error("Unable to load tbox assertion cache from DB", e);
throw new RuntimeException(e);
} }
// TBox inferences // TBox inferences
@ -155,6 +156,7 @@ public class WebappDaoSetup extends JenaDataSourceSetupBase
inferenceOms.setTBoxModel(tboxInferences); inferenceOms.setTBoxModel(tboxInferences);
} catch (Throwable e) { } catch (Throwable e) {
log.error("Unable to load tbox inference cache from DB", e); log.error("Unable to load tbox inference cache from DB", e);
throw new RuntimeException(e);
} }
// union ABox // union ABox
@ -204,6 +206,7 @@ public class WebappDaoSetup extends JenaDataSourceSetupBase
} catch (Throwable e) { } catch (Throwable e) {
log.error("Unable to load application metadata model cache from DB" log.error("Unable to load application metadata model cache from DB"
, e); , e);
throw new RuntimeException(e);
} }
checkForNamespaceMismatch( baseOms.getApplicationMetadataModel(), ctx ); checkForNamespaceMismatch( baseOms.getApplicationMetadataModel(), ctx );