Java Code Examples for org.eclipse.rdf4j.repository.RepositoryConnection#rollback()

protected void upload(Repository rep, Model dataGraph) {
	RepositoryConnection con = rep.getConnection();

	try {
		con.begin();
		con.add(dataGraph);
		con.commit();
	} catch (Exception e) {
		if (con.isActive()) {
			con.rollback();
		}
		throw e;
	} finally {
		con.close();
	}
}
 

@Test
public void testDistanceFunction() throws Exception {
	RepositoryConnection connection = getConnection();
	String queryStr = "prefix geo:  <" + GEO.NAMESPACE + ">" + "prefix geof: <" + GEOF.NAMESPACE + ">"
			+ "prefix search: <" + LuceneSailSchema.NAMESPACE + ">"
			+ "select ?toUri ?fromUri ?dist where {(?from ?range ?units geo:asWKT search:distance)"
			+ "search:withinDistance (?toUri ?to ?dist) ."
			+ "?toUri a <urn:geo/Landmark>. ?fromUri geo:asWKT ?from; <urn:geo/maxDistance> ?range.}";
	try {
		TupleQuery query = connection.prepareTupleQuery(QueryLanguage.SPARQL, queryStr);
		query.setBinding("units", GEOF.UOM_METRE);

		printTupleResult(query);
		try (TupleQueryResult result = query.evaluate()) {
			int count = countTupleResults(result);
			Assert.assertEquals(2, count);
		}
	} catch (Exception e) {
		connection.rollback();
		throw e;
	} finally {
		connection.commit();
	}
}
 

/**
 * Opens a {@link RepositoryConnection} to the given Repository within a transaction, sends the connection to the
 * given {@link Function}, before either rolling back the transaction if it failed, or committing the transaction if
 * it was successful.
 *
 * @param                 <T> The type of the return value.
 * @param repository      The {@link Repository} to open a connection to.
 * @param processFunction A {@link Function} that performs an action on the connection and returns a result.
 * @return The result of applying the function.
 * @throws RepositoryException              If there was an exception dealing with the Repository.
 * @throws UnknownTransactionStateException If the transaction state was not properly recognised. (Optional specific
 *                                          exception)
 */
public static <T> T get(Repository repository, Function<RepositoryConnection, T> processFunction)
		throws RepositoryException, UnknownTransactionStateException {
	RepositoryConnection conn = null;

	try {
		conn = repository.getConnection();
		conn.begin();
		T result = processFunction.apply(conn);
		conn.commit();
		return result;
	} catch (RepositoryException e) {
		if (conn != null && conn.isActive()) {
			conn.rollback();
		}
		throw e;
	} finally {
		if (conn != null && conn.isOpen()) {
			conn.close();
		}
	}
}
 

protected void upload(IRI graphURI, Resource context) throws Exception {
	RepositoryConnection con = getDataRepository().getConnection();

	try {
		con.begin();
		RDFFormat rdfFormat = Rio.getParserFormatForFileName(graphURI.toString()).orElse(RDFFormat.TURTLE);
		RDFParser rdfParser = Rio.createParser(rdfFormat, getDataRepository().getValueFactory());
		rdfParser.setVerifyData(false);
		rdfParser.setDatatypeHandling(DatatypeHandling.IGNORE);
		// rdfParser.setPreserveBNodeIDs(true);

		RDFInserter rdfInserter = new RDFInserter(con);
		rdfInserter.enforceContext(context);
		rdfParser.setRDFHandler(rdfInserter);

		URL graphURL = new URL(graphURI.toString());
		InputStream in = graphURL.openStream();
		try {
			rdfParser.parse(in, graphURI.toString());
		} finally {
			in.close();
		}

		con.commit();
	} catch (Exception e) {
		if (con.isActive()) {
			con.rollback();
		}
		throw e;
	} finally {
		con.close();
	}
}
 

private void upload(IRI graphURI, Resource context) throws Exception {
	RepositoryConnection con = dataRep.getConnection();

	try {
		con.begin();
		RDFFormat rdfFormat = Rio.getParserFormatForFileName(graphURI.toString()).orElse(RDFFormat.TURTLE);
		RDFParser rdfParser = Rio.createParser(rdfFormat, dataRep.getValueFactory());
		rdfParser.setVerifyData(false);
		rdfParser.setDatatypeHandling(DatatypeHandling.IGNORE);
		// rdfParser.setPreserveBNodeIDs(true);

		RDFInserter rdfInserter = new RDFInserter(con);
		rdfInserter.enforceContext(context);
		rdfParser.setRDFHandler(rdfInserter);

		URL graphURL = new URL(graphURI.toString());
		InputStream in = graphURL.openStream();
		try {
			rdfParser.parse(in, graphURI.toString());
		} finally {
			in.close();
		}

		con.commit();
	} catch (Exception e) {
		if (con.isActive()) {
			con.rollback();
		}
		throw e;
	} finally {
		con.close();
	}
}
 

@Override
protected void runTest() throws Exception {
	RepositoryConnection con = dataRep.getConnection();
	RepositoryConnection erCon = expectedResultRepo.getConnection();
	try {
		String updateString = readUpdateString();

		con.begin();

		Update update = con.prepareUpdate(QueryLanguage.SPARQL, updateString, requestFileURL);
		update.setDataset(dataset);
		update.execute();

		con.commit();

		// check default graph
		logger.info("checking default graph");
		compareGraphs(Iterations.asList(con.getStatements(null, null, null, true, (Resource) null)),
				Iterations.asList(erCon.getStatements(null, null, null, true, (Resource) null)));

		for (String namedGraph : inputNamedGraphs.keySet()) {
			logger.info("checking named graph {}", namedGraph);
			IRI contextURI = con.getValueFactory().createIRI(namedGraph.replaceAll("\"", ""));
			compareGraphs(Iterations.asList(con.getStatements(null, null, null, true, contextURI)),
					Iterations.asList(erCon.getStatements(null, null, null, true, contextURI)));
		}
	} catch (Exception e) {
		if (con.isActive()) {
			con.rollback();
		}
		throw e;
	} finally {
		con.close();
		erCon.close();
	}
}
 

@Override
protected void runTest() throws Exception {

	logger.debug("running {}", getName());

	RepositoryConnection con = dataRep.getConnection();
	RepositoryConnection erCon = expectedResultRepo.getConnection();
	try {
		String updateString = readUpdateString();

		con.begin();

		Update update = con.prepareUpdate(QueryLanguage.SPARQL, updateString, requestFile);
		update.setDataset(dataset);
		update.execute();

		con.commit();

		// check default graph
		logger.info("checking default graph");
		compareGraphs(Iterations.asList(con.getStatements(null, null, null, true, (Resource) null)),
				Iterations.asList(erCon.getStatements(null, null, null, true, (Resource) null)));

		for (String namedGraph : inputNamedGraphs.keySet()) {
			logger.info("checking named graph {}", namedGraph);
			IRI contextURI = con.getValueFactory().createIRI(namedGraph.replaceAll("\"", ""));
			compareGraphs(Iterations.asList(con.getStatements(null, null, null, true, contextURI)),
					Iterations.asList(erCon.getStatements(null, null, null, true, contextURI)));
		}
	} catch (Exception e) {
		if (con.isActive()) {
			con.rollback();
		}
		throw e;
	} finally {
		con.close();
		erCon.close();
	}
}
 

protected boolean isSupported(IsolationLevels level) throws RepositoryException {
	RepositoryConnection con = store.getConnection();
	try {
		con.begin(level);
		return true;
	} catch (UnknownTransactionStateException e) {
		return false;
	} finally {
		try {
			con.rollback();
		} finally {
			con.close();
		}
	}
}