Examples of javax.jdo.Transaction.begin()

javax.jdo.Transaction.begin()
Begin a transaction. The type of transaction is determined by the setting of the Optimistic flag. @see #setOptimistic @see #getOptimistic @throws JDOUserException if transactions are managed by a containerin the managed environment, or if the transaction is already active.


        Transaction tx = pm.currentTransaction();


        try
        {
            tx.begin();


            Extent extent = pm.getExtent( ProjectGroup.class, true );


            Query query = pm.newQuery( extent );

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        Transaction tx = pm.currentTransaction();


        try
        {
            tx.begin();


            Extent extent = pm.getExtent( Project.class, true );


            Query query = pm.newQuery( extent );

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        Transaction tx = pm.currentTransaction();


        try
        {
            tx.begin();


            Extent extent = pm.getExtent( ProjectGroup.class, true );


            Query query = pm.newQuery( extent );

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        Transaction tx = pm.currentTransaction();


        try
        {
            tx.begin();


            Extent extent = pm.getExtent( BuildDefinition.class, true );


            Query query = pm.newQuery( extent );

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    /** */
    private void  createObjects(PersistenceManager pm) {
        Transaction tx = pm.currentTransaction();
        try {
            tx.begin();
            p1 = new PCPoint(1,3);
            p2 = new PCPoint(2,4);
            p3 = new PCPoint(3,5);
            p4 = new PCPoint(4,6);
            p5 = new PCPoint(5,7);

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    /* test deletePersistent (Object pc) */
    private void runTestDeletePersistent(PersistenceManager pm) {
        Transaction tx = pm.currentTransaction();
        try {
            tx.begin();
            try {
                pm.deletePersistent(p1);
                fail(ASSERTION_FAILED,
                     "pm.deletePersistent(Object) with pc instance managed by another pm should throw exception");
            }

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    /* test deletePersistentAll (Collection pcs) */
    private void runTestDeletePersistentAll1(PersistenceManager pm) {
        Transaction tx = pm.currentTransaction();
        try {
            tx.begin();


            Collection col1 = new HashSet();
            col1.add(p2);
            col1.add(p3);

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    /* test deletePersistentAll (Object[] o) */
    private void runTestDeletePersistentAll2(PersistenceManager pm) {
        Transaction tx = pm.currentTransaction();
        try {
            tx.begin();


            Collection col1 = new HashSet();
            col1.add(p4);
            col1.add(p5);
            Object[] obj1= col1.toArray();

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        public void run() {
            String threadName = Thread.currentThread().getName();
            Transaction tx = pm.currentTransaction();
            try {
                ThreadSafe.this.logger.debug("[" + threadName + "]: running");
                tx.begin();
                pm.makePersistent(pc);
                tx.commit();
                tx = null;
                winning((PCPoint) pc);
                complete();

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        Transaction tx2 = pm2.currentTransaction();
        
        pm = getPM();
        Transaction tx = pm.currentTransaction();
        try {
            tx.begin();
            tx2.begin();
            
            PCPoint p11 = new PCPoint(110, 120);
            PCPoint p12 = new PCPoint(120, 140);
            PCRect rect1 = new PCRect (0, p11, p12);

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