/**
  * 生成ack响应供测试程序使用
  * @return ack响应集供test case选择
  */
 private function _gen_ack_response($subject)
 {
     $ack = new BStompAckFrame();
     $ack->status = BStompIdAckType::TOPIC_ID;
     $ack->ack_type = BStompFrameType::ACK;
     $ack->session_message_id = TestUtilities::get_private_var($subject, '_session_msg_id') + 1;
     $this->assertFalse(false === $ack->session_message_id);
     $ack->topic_message_id = 369;
     $ack->global_message_id = 7659;
     $ack->delay_time = 0;
     $ack->destination = 'unknown';
     $ack->receipt_id = 'fake-receipt-id';
     $ack->store();
     $good_ack = $ack->buffer();
     $orig_smid = $ack->session_message_id;
     $ack->session_message_id = $orig_smid + 10;
     $ack->store();
     $bad_session = $ack->buffer();
     $ack->session_message_id = $orig_smid;
     $ack->receipt_id = BigpipeUtilities::get_uid();
     $ack->store();
     $bad_receipt = $ack->buffer();
     $res_arr = array('good' => $good_ack, 'bad_session' => $bad_session, 'bad_receipt' => $bad_receipt, 'error_body' => 'error');
     return $res_arr;
 }
 /**
  * 接收返回消息, 判断发布是否成功
  * @return BigpipePubResult on success or false on failure
  */
 private function _check_ack($receipt_id, &$send_result)
 {
     // 接收CONNECTED
     $res_body = $this->_stomp_adapter->receive();
     if (null === $res_body) {
         return false;
     }
     // parse ACK
     $ack = new BStompAckFrame();
     if (!$ack->load($res_body)) {
         BigpipeLog::warning('[stomp parse ack frame error][cmd_type:%d][err_msg:]', $ack->command_type, $ack->last_error_message());
         return false;
     }
     if ($ack->session_message_id != $this->_session_msg_id) {
         BigpipeLog::warning('[check session message id error][send:%u][ack:%u]', $this->_session_msg_id, $ack->session_message_id);
         return false;
     }
     if ($ack->receipt_id != $receipt_id) {
         BigpipeLog::warning('[check receipt id error][send:%u][ack:%u]', $receipt_id, $ack->receipt_id);
         return false;
     }
     // 填充result
     $send_result = new BigpipePubResult();
     $send_result->error_no = $ack->status;
     $send_result->pipelet_id = $this->_pipelet_id;
     $send_result->pipelet_msg_id = $ack->topic_message_id;
     $send_result->session_msg_id = $ack->session_message_id;
     return $send_result;
 }