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.addStatement(uriC, uriA, uriA, uriA);
            sc.commit();
            sc.begin();
            sc.addStatement(uriA, uriA, uriB, uriB);
            sc.commit();
            sc.begin();
            after = countStatements(sc, null, uriA, null, false);
            assertEquals(0, before);
            assertEquals(3, after);


        } finally {

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    @Test
    public void testGetStatementsWithVariableContexts() throws Exception {
        SailConnection sc = sail.getConnection();
        try {
            sc.begin();
            URI uriA = sail.getValueFactory().createURI("http://example.org/uriA");
            URI uriB = sail.getValueFactory().createURI("http://example.org/uriB");
            URI uriC = sail.getValueFactory().createURI("http://example.org/uriC");
            int count;
            sc.clear();

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            URI uriC = sail.getValueFactory().createURI("http://example.org/uriC");
            int count;
            sc.clear();
            //sc.removeStatements(uriA, uriA, uriA);
            sc.commit();
            sc.begin();
            Resource[] contexts = {uriA, null};
            sc.addStatement(uriA, uriB, uriC, contexts);
            sc.commit();
            sc.begin();

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            sc.commit();
            sc.begin();
            Resource[] contexts = {uriA, null};
            sc.addStatement(uriA, uriB, uriC, contexts);
            sc.commit();
            sc.begin();


            // Get statements from all contexts.
            count = countStatements(sc, uriA, null, null, false);
            assertEquals(2, count);

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    @Test
    public void testRemoveStatements() throws Exception {
        SailConnection sc = sail.getConnection();
        try {
            sc.begin();
            URI uriA = sail.getValueFactory().createURI("http://example.org/uriA");
            URI uriB = sail.getValueFactory().createURI("http://example.org/uriB");
            URI uriC = sail.getValueFactory().createURI("http://example.org/uriC");
            Resource[] contexts = {uriA, null};
            int count;

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            int count;


            // Remove from all contexts.
            sc.removeStatements(uriA, null, null);
            sc.commit();
            sc.begin();
            count = countStatements(sc, uriA, null, null, false);
            assertEquals(0, count);
            sc.addStatement(uriA, uriB, uriC, contexts);
            sc.commit();
            sc.begin();

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            sc.begin();
            count = countStatements(sc, uriA, null, null, false);
            assertEquals(0, count);
            sc.addStatement(uriA, uriB, uriC, contexts);
            sc.commit();
            sc.begin();
            count = countStatements(sc, uriA, null, null, false);
            assertEquals(2, count);
            sc.removeStatements(uriA, null, null);
            sc.commit();
            sc.begin();

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            sc.begin();
            count = countStatements(sc, uriA, null, null, false);
            assertEquals(2, count);
            sc.removeStatements(uriA, null, null);
            sc.commit();
            sc.begin();
            count = countStatements(sc, uriA, null, null, false);
            assertEquals(0, count);


            // Remove from one partition context.
            sc.removeStatements(uriA, null, null);

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            assertEquals(0, count);


            // Remove from one partition context.
            sc.removeStatements(uriA, null, null);
            sc.commit();
            sc.begin();
            count = countStatements(sc, uriA, null, null, false);
            assertEquals(0, count);
            sc.addStatement(uriA, uriB, uriC, contexts);
            sc.commit();
            sc.begin();

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            sc.begin();
            count = countStatements(sc, uriA, null, null, false);
            assertEquals(0, count);
            sc.addStatement(uriA, uriB, uriC, contexts);
            sc.commit();
            sc.begin();
            count = countStatements(sc, uriA, null, null, false);
            assertEquals(2, count);
            Resource[] oneContext = {uriA};
            sc.removeStatements(uriA, null, null, oneContext);
            sc.commit();

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