code: public static MessageDto acquireLocks(String groupId, Set<String> locks, int lockType) {
          DTXLockParams dtxLockParams = new DTXLockParams();
          dtxLockParams.setGroupId(groupId);
          dtxLockParams.setContextId(Transactions.APPLICATION_ID_WHEN_RUNNING);
          dtxLockParams.setLocks(locks);
          dtxLockParams.setLockType(lockType);
          MessageDto messageDto = new MessageDto();
          messageDto.setAction(MessageConstants.ACTION_ACQUIRE_DTX_LOCK);
          messageDto.setData(dtxLockParams);
          return messageDto;
      }
docs: 申请锁消息
  @param groupId groupId
  @param locks    locks
  @param lockType lockType
  @return message