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()

        addFile(SailTest.class.getResourceAsStream("graph-example-bnodes.trig"), RDFFormat.TRIG);


        sc = sail.getConnection();
        //showStatements(sc, null, null, null);
        try {
            sc.begin();
            assertEquals(14, countStatements(sc, null, null, null, false));
            assertEquals(edgesBefore + 14, countEdges());
            assertEquals(verticesBefore + 10, countVertices());


            sc.removeStatements(ref, null, null);

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            assertEquals(edgesBefore + 14, countEdges());
            assertEquals(verticesBefore + 10, countVertices());


            sc.removeStatements(ref, null, null);
            sc.commit();
            sc.begin();


            assertEquals(13, countStatements(sc, null, null, null, false));
            assertEquals(edgesBefore + 13, countEdges());
            assertEquals(verticesBefore + 9, countVertices());

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            assertEquals(edgesBefore + 13, countEdges());
            assertEquals(verticesBefore + 9, countVertices());


            sc.clear();
            sc.commit();
            sc.begin();


            assertEquals(0, countStatements(sc, null, null, null, false));
            assertEquals(0, countEdges());
            // Namespaces vertex is still present.
            assertEquals(verticesBefore, countVertices());

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        clear();
        int edgesBefore, verticesBefore;


        SailConnection sc = sail.getConnection();
        try {
            sc.begin();
            edgesBefore = countEdges();
            verticesBefore = countVertices();
        } finally {
            sc.rollback();
            sc.close();

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            sc.commit();
            sc.begin();
            before = countStatements(sc, uriA, uriB, uriC, false);
            sc.addStatement(uriA, uriB, uriC);
            sc.commit();
            sc.begin();
            after = countStatements(sc, uriA, uriB, uriC, false);
            assertEquals(0, before);
            assertEquals(1, after);


            // one specific context, different S,P,O

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            assertEquals(1, after);


            // one specific context, different S,P,O
            sc.removeStatements(uriA, null, null, uriD);
            sc.commit();
            sc.begin();
            before = countStatements(sc, uriA, uriB, uriC, false, uriD);
            sc.addStatement(uriA, uriB, uriC, uriD);
            sc.commit();
            sc.begin();
            after = countStatements(sc, uriA, uriB, uriC, false, uriD);

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            sc.commit();
            sc.begin();
            before = countStatements(sc, uriA, uriB, uriC, false, uriD);
            sc.addStatement(uriA, uriB, uriC, uriD);
            sc.commit();
            sc.begin();
            after = countStatements(sc, uriA, uriB, uriC, false, uriD);
            assertEquals(0, before);
            assertEquals(1, after);


            // one specific context, same S,P,O,G

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            assertEquals(1, after);


            // one specific context, same S,P,O,G
            sc.removeStatements(uriA, null, null, uriA);
            sc.commit();
            sc.begin();
            before = countStatements(sc, uriA, uriB, uriC, false, uriA);
            sc.addStatement(uriA, uriB, uriC, uriA);
            sc.commit();
            sc.begin();
            after = countStatements(sc, uriA, uriB, uriC, false, uriA);

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            sc.commit();
            sc.begin();
            before = countStatements(sc, uriA, uriB, uriC, false, uriA);
            sc.addStatement(uriA, uriB, uriC, uriA);
            sc.commit();
            sc.begin();
            after = countStatements(sc, uriA, uriB, uriC, false, uriA);
            assertEquals(0, before);
            assertEquals(1, after);
        } finally {
            sc.rollback();

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    @Test
    public void testGetStatementsP_SOG() throws Exception {
        SailConnection sc = sail.getConnection();
        try {
            sc.begin();
            URI uriA = sail.getValueFactory().createURI("http://example.org/test/P_SOG#a");
            URI uriB = sail.getValueFactory().createURI("http://example.org/test/P_SOG#b");
            URI uriC = sail.getValueFactory().createURI("http://example.org/test/P_SOG#c");
            URI foo = sail.getValueFactory().createURI("http://example.org/ns#foo");
            URI firstName = sail.getValueFactory().createURI("http://example.org/ns#firstName");

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