TransactionLog.Transaction txn = log.newTransaction();
txn.enqueueMessage(mockQueue, 21L);
txn.abortTran();
txn = log.newTransaction();
txn.enqueueMessage(mockQueue, 22L);
txn.enqueueMessage(mockQueue, 23L);
txn.commitTran();
List<Long> enqueuedIds = bdbStore.getEnqueuedMessages(mockQueueName);