public Graph generateGraph() {
try {
if (this.connection == null) {
this.connection = ds.getConnection();
} else if (this.connection.isClosed()) {
try {
this.connection.close();
} catch (SQLException e) {
// The connection will throw an "Already closed"
// SQLException that we need to catch. We need to
// make this extra call to .close() in order to make
// sure that the connection is returned to the pool.
// This depends on the particular behavior of version
// 1.4 of the Apache Commons connection pool library.
// Earlier versions threw the exception right away,
// making this impossible. Future versions may do the
// same.
}
this.connection = ds.getConnection();
}
Store store = SDBFactory.connectStore(connection, storeDesc);
return SDBFactory.connectNamedGraph(store, graphID);
} catch (SQLException e) {
String errMsg = "Unable to generate SDB graph";
log.error(errMsg, e);
throw new RuntimeException(errMsg, e);
}
}
@Override
public Graph getGraph() {
Store store = StoreCreator.getHashMySQL();
return SDBFactory.connectNamedGraph(store, "http://example.com/graph");
}