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.

    PersistenceManager pm = null;
    try{
      pm = pmf.getPersistenceManager();
      Transaction tx = pm.currentTransaction();
      try{
        tx.begin();
        pm.makePersistent(sum);
        tx.commit();
        log.info("[SummaryCronService#execute()] save summary: " + sum);
      }finally{
        if(tx!=null&&tx.isActive()) tx.rollback();

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    try{
      pm = pmf.getPersistenceManager();
      Transaction tx = pm.currentTransaction();
      try{
        for(Result r: resultList){
          tx.begin();
          log.info("[ResultsCronService#execute()] " +
              "insert result list (pre): " + r);
          pm.makePersistentAll(r);
          log.info("[ResultsCronService#execute()] " +
              "insert result (post): " + resultList.size());

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    PersistenceManager pm = null;
    try{
      pm = pmf.getPersistenceManager();
      Transaction tx = pm.currentTransaction();
      try{
        tx.begin();
        summary = 
            pm.getObjectById(Summary.class, Summary.DBKEY_SUMMARY);
        log.info("[StatisticsManager#retrieveSummary()] got from " +
            "database: " + summary);
        tx.commit();

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        Transaction tx = pm.currentTransaction();


        try
        {
            // this must be done in the same transaction
            tx.begin();


            // first removing linked jdk


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

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        Transaction tx = pm.currentTransaction();


        try
        {
            tx.begin();


            Extent extent = pm.getExtent( Installation.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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        Transaction tx = pm.currentTransaction();


        try
        {
            tx.begin();


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


            Query query = pm.newQuery( extent );
            query.setFilter( "this.template == true" );

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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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