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()

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


            // Add plain literal statement to the default context.

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            assertEquals(1, after);


            // Add plain literal statement to the default context.
            sc.removeStatements(null, null, plainLitA);
            sc.commit();
            sc.begin();
            before = countStatements(sc, null, uriA, plainLitA, false);
            sc.addStatement(uriA, uriA, plainLitA);
            sc.addStatement(uriA, uriB, plainLitA);
            sc.addStatement(uriB, uriB, plainLitA);
            sc.commit();

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


            // Add string-typed literal statement to the default context.

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            assertEquals(1, after);


            // Add string-typed literal statement to the default context.
            sc.removeStatements(null, null, fooLabel);
            sc.commit();
            sc.begin();
            before = countStatements(sc, null, firstName, fooLabel, false);
            sc.addStatement(foo, firstName, fooLabel);
            sc.commit();
            sc.begin();
            after = countStatements(sc, null, firstName, fooLabel, false);

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            sc.commit();
            sc.begin();
            before = countStatements(sc, null, firstName, fooLabel, false);
            sc.addStatement(foo, firstName, fooLabel);
            sc.commit();
            sc.begin();
            after = countStatements(sc, null, firstName, fooLabel, false);
            assertEquals(0, before);
            assertEquals(1, after);
            assertEquals(foo, toSet(sc.getStatements(null, firstName, fooLabel, false)).iterator().next().getSubject());

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    @Test
    public void testGetStatementsSPO_G() throws Exception {
        SailConnection sc = sail.getConnection();
        try {
            sc.begin();
            URI uriA = sail.getValueFactory().createURI("http://example.org/test/S_POG#a");
            URI uriB = sail.getValueFactory().createURI("http://example.org/test/S_POG#b");
            URI uriC = sail.getValueFactory().createURI("http://example.org/test/S_POG#c");
            URI uriD = sail.getValueFactory().createURI("http://example.org/test/S_POG#d");
            int before, after;

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            int before, after;


            // default context, different S,P,O
            sc.removeStatements(uriA, null, null);
            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);

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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);


            // default context, same S,P,O

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            assertEquals(1, after);


            // default context, same S,P,O
            sc.removeStatements(uriA, null, null);
            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);

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        clear();
        int edgesBefore, verticesBefore;


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

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