Examples of org.openrdf.sail.SailConnection.begin()

org.openrdf.sail.SailConnection.begin()
Begins a transaction requiring {@link #commit()} or {@link #rollback()} tobe called to close the transaction. @throws StoreException If the connection could not start a transaction, or if it already has an active transaction. @see #isAutoCommit()

            assertEquals(sc.getNamespace(prefix), name);


            // Remove the namespace and make sure it's gone.
            sc.removeNamespace(prefix);
            sc.commit();
            sc.begin();
            assertNull(sc.getNamespace(prefix));


            // Same thing for the default namespace.
            sc.setNamespace(emptyPrefix, name);
            sc.commit();

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            assertNull(sc.getNamespace(prefix));


            // Same thing for the default namespace.
            sc.setNamespace(emptyPrefix, name);
            sc.commit();
            sc.begin();
            assertEquals(sc.getNamespace(emptyPrefix), name);
            sc.removeNamespace(emptyPrefix);
            sc.commit();
            sc.begin();
            assertNull(sc.getNamespace(emptyPrefix));

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            sc.commit();
            sc.begin();
            assertEquals(sc.getNamespace(emptyPrefix), name);
            sc.removeNamespace(emptyPrefix);
            sc.commit();
            sc.begin();
            assertNull(sc.getNamespace(emptyPrefix));
        } finally {
            sc.rollback();
            sc.close();
        }

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        URI uriA = sail.getValueFactory().createURI("http://example.org/test/persistentCommits#a");
        URI uriB = sail.getValueFactory().createURI("http://example.org/test/persistentCommits#b");
        URI uriC = sail.getValueFactory().createURI("http://example.org/test/persistentCommits#c");
        sc = sail.getConnection();
        try {
            sc.begin();
            count = countStatements(sc, uriA, null, null, false);
            assertEquals(0, count);
            sc.rollback();
            sc.close();

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            assertEquals(0, count);
            sc.rollback();
            sc.close();


            sc = sail.getConnection();
            sc.begin();
            sc.addStatement(uriA, uriB, uriC);
            count = countStatements(sc, uriA, null, null, false);
            assertEquals(1, count);
            sc.commit();
            sc.close();

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            assertEquals(1, count);
            sc.commit();
            sc.close();


            sc = sail.getConnection();
            sc.begin();
            count = countStatements(sc, uriA, null, null, false);
            assertEquals(1, count);
            sc.rollback();
            sc.close();

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            assertEquals(1, count);
            sc.rollback();
            sc.close();


            sc = sail.getConnection();
            sc.begin();
            sc.removeStatements(uriA, null, null);
            count = countStatements(sc, uriA, null, null, false);
            assertEquals(0, count);
            sc.commit();
            sc.close();

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            assertEquals(0, count);
            sc.commit();
            sc.close();


            sc = sail.getConnection();
            sc.begin();
            count = countStatements(sc, uriA, null, null, false);
            assertEquals(0, count);
        } finally {
            sc.rollback();
            sc.close();

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        URI uriC = sail.getValueFactory().createURI("http://example.org/test/nullContext#c");
        int count = 0;


        SailConnection sc = sail.getConnection();
        try {
            sc.begin();
            count = countStatements(sc, uriA, null, null, false);
            assertEquals(0, count);
            sc.addStatement(uriA, uriB, uriC);
            Statement statement = sc.getStatements(uriA, uriB, uriC, false, new Resource[]{null}).next();
            Resource context = statement.getContext();

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     */
    public synchronized void load(final File fileOrDirectory) throws Exception {
        LOGGER.info("loading from " + fileOrDirectory);
        SailConnection c = sail.getConnection();
        try {
            c.begin();
            long startTime = System.currentTimeMillis();


            long count = loadFile(fileOrDirectory, c);


            // commit leftover statements

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