Examples of com.sleepycat.je.Environment.beginTransaction()

com.sleepycat.je.Environment.beginTransaction()
Creates a new transaction in the database environment.
Transaction handles are free-threaded; transactions handles may be used concurrently by multiple threads.

Cursors may not span transactions; that is, each cursor must be opened and closed within a single transaction. The parent parameter is a placeholder for nested transactions, and must currently be null.
@param txnConfig The transaction attributes. If null, defaultattributes are used. @return The newly created transaction's handle. @throws com.sleepycat.je.rep.InsufficientReplicasException if the Masterin a replicated environment could not contact a quorum of replicas as determined by the {@link ReplicaAckPolicy}. @throws com.sleepycat.je.rep.ReplicaConsistencyException if a replicain a replicated environment cannot become consistent within the timeout period. @throws EnvironmentFailureException if an unexpected, internal orenvironment-wide failure occurs. @throws UnsupportedOperationException if this is not a transactionalenvironment. @throws IllegalStateException if this handle or the underlyingenvironment has been closed. @throws IllegalArgumentException if an invalid parameter is specified,for example, an invalid {@code TransactionConfig} parameter.

        boolean autoCommit = false;
        Environment env = db.getEnvironment();
        if (transactional &&
            txn == null &&
            DbCompat.getThreadTransaction(env) == null) {
            txn = env.beginTransaction
                (null, secIndex.getAutoCommitTransactionConfig());
            autoCommit = true;
        }


        boolean failed = true;

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        boolean autoCommit = false;
        Environment env = db.getEnvironment();
        if (transactional &&
            txn == null &&
            DbCompat.getThreadTransaction(env) == null) {
            txn = env.beginTransaction(null, getAutoCommitTransactionConfig());
            autoCommit = true;
        }
        
        CursorConfig cursorConfig = null;
        if (concurrentDB) {

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        Environment env = new Environment(envDir, envConfig);
        DatabaseConfig dbConfig = new DatabaseConfig();
        dbConfig.setReadOnly(true);
        dbConfig.setTransactional(true);
        dbConfig.setAllowCreate(false);
        Transaction txn = env.beginTransaction(null, null);
        Database db = env.openDatabase(txn, DbType.REP_GROUP.getInternalName(),
                                       dbConfig);


        DatabaseEntry groupEntry = new DatabaseEntry();
        OperationStatus status =

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                    throw new IllegalStateException
                        ("Nested transactions are not supported");
                }
                Transaction parentTxn = trans.txn;
                trans = new Trans(trans, config);
                trans.txn = env.beginTransaction(parentTxn, config);
                localTrans.set(trans);
            } else {
                trans.txn = env.beginTransaction(null, config);
                trans.config = config;
            }

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                Transaction parentTxn = trans.txn;
                trans = new Trans(trans, config);
                trans.txn = env.beginTransaction(parentTxn, config);
                localTrans.set(trans);
            } else {
                trans.txn = env.beginTransaction(null, config);
                trans.config = config;
            }
        } else {
            trans = new Trans(null, config);
            trans.txn = env.beginTransaction(null, config);

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                trans.txn = env.beginTransaction(null, config);
                trans.config = config;
            }
        } else {
            trans = new Trans(null, config);
            trans.txn = env.beginTransaction(null, config);
            localTrans.set(trans);
        }
        return trans.txn;
    }

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  private void execute(Operation... operations)
  {
    Environment env = this.pool.take();
    try
    {
      Transaction transaction = env.beginTransaction(null, null);
      try
      {
        for (Operation operation: operations)
        {
          operation.execute(env, transaction);

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         * want transactional support for the database.
         * However, we could have used autocommit to 
         * perform the same thing by simply passing a 
         * null txn handle to openDatabase().
         */
        Transaction txn = exampleEnv.beginTransaction(null, null);
        DatabaseConfig dbConfig = new DatabaseConfig();
        dbConfig.setTransactional(true); 
        dbConfig.setAllowCreate(true);
        dbConfig.setSortedDuplicates(true);
        Database exampleDb = exampleEnv.openDatabase(txn,

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                /* 
                 * Note that autocommit mode, described in the Getting
                 * Started Guide, is an alternative to explicitly
                 * creating the transaction object.
                 */
                txn = exampleEnv.beginTransaction(null, null);


                /* Use a binding to convert the int into a DatabaseEntry. */


                IntegerBinding.intToEntry(i, keyEntry);
                IntegerBinding.intToEntry(i+1, dataEntry);

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        envConfig.setTransactional(true); 
        envConfig.setAllowCreate(true);    
        Environment exampleEnv = new Environment(envDir, envConfig);
        
        /* Make a database within that environment */
        Transaction txn = exampleEnv.beginTransaction(null, null);
        DatabaseConfig dbConfig = new DatabaseConfig();
        dbConfig.setTransactional(true); 
        dbConfig.setAllowCreate(true);
        dbConfig.setSortedDuplicates(true);
        Database exampleDb = exampleEnv.openDatabase(txn,

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