Package com.hp.hpl.jena.query

Examples of com.hp.hpl.jena.query.Dataset.begin()

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        //   dataset is used for a read transaction.
        //   An application can have other Datasets, in the same JVM,
        //   tied to the same TDB database performing read or write
        //   transactions concurrently.
       
        dataset.begin(ReadWrite.READ) ;
        try
        {
            // Do some queries
            String sparqlQueryString1 = "SELECT (count(*) AS ?count) { ?s ?p ?o }" ;
            execQuery(sparqlQueryString1, dataset) ;
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        //   tied to the same TDB database performing read
        //   transactions concurrently. If another write transaction
        //   starts, the call of dataset.begin(WRITE) blocks until
        //   existing writer finishes.
       
        dataset.begin(ReadWrite.WRITE) ;
        try
        {
            GraphStore graphStore = GraphStoreFactory.create(dataset) ;
            // Do a SPARQL Update.
            String sparqlUpdateString = StrUtils.strjoinNL(
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        Dataset ds2 = create() ;
       
        ds1.begin(ReadWrite.WRITE) ;
        ds1.getDefaultModel().getGraph().add(triple1) ;
       
        ds2.begin(ReadWrite.READ) ;
        assertTrue(ds2.getDefaultModel().isEmpty()) ;
        ds2.commit() ;
       
        ds1.commit() ;
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        assertTrue(ds2.getDefaultModel().isEmpty()) ;
        ds2.commit() ;
       
        ds1.commit() ;

        ds2.begin(ReadWrite.READ) ;
        assertFalse(ds2.getDefaultModel().isEmpty()) ;
        assertEquals(1, ds2.getDefaultModel().size()) ;
        ds2.commit() ;
    }
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    }
   
    @Test public void transaction_1()
    {
        Dataset ds = create() ;
        ds.begin(ReadWrite.READ) ;
        assertTrue(ds.isInTransaction()) ;
        ds.end() ;
        assertFalse(ds.isInTransaction()) ;
    }
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    }

    @Test public void transaction_2()
    {
        Dataset ds = create() ;
        ds.begin(ReadWrite.WRITE) ;
        assertTrue(ds.isInTransaction()) ;
        ds.commit() ;
        assertFalse(ds.isInTransaction()) ;
    }
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    }

    @Test public void transaction_3()
    {
        Dataset ds = create() ;
        ds.begin(ReadWrite.WRITE) ;
        assertTrue(ds.isInTransaction()) ;
        ds.abort() ;
        assertFalse(ds.isInTransaction()) ;
    }
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    }

    @Test public void transaction_4()
    {
        Dataset ds = create() ;
        ds.begin(ReadWrite.WRITE) ;
        assertTrue(ds.isInTransaction()) ;
        ds.commit() ;
        assertFalse(ds.isInTransaction()) ;
        ds.end() ;
        assertFalse(ds.isInTransaction()) ;
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    }

    @Test public void transaction_5()
    {
        Dataset ds = create() ;
        ds.begin(ReadWrite.WRITE) ;
        assertTrue(ds.isInTransaction()) ;
        ds.abort() ;
        assertFalse(ds.isInTransaction()) ;
        ds.end() ;
        assertFalse(ds.isInTransaction()) ;
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    @Test public void transaction_6()
    {
        // .end is not necessary
        Dataset ds = create() ;
        ds.begin(ReadWrite.WRITE) ;
        assertTrue(ds.isInTransaction()) ;
        ds.abort() ;
        assertFalse(ds.isInTransaction()) ;

        ds.begin(ReadWrite.WRITE) ;
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