C++ Transporter::isConnected方法代码示例

void
TransporterRegistry::update_connections()
{
  for (int i= 0, n= 0; n < nTransporters; i++){
    Transporter * t = theTransporters[i];
    if (!t)
      continue;
    n++;

    const NodeId nodeId = t->getRemoteNodeId();
    switch(performStates[nodeId]){
    case CONNECTED:
    case DISCONNECTED:
      break;
    case CONNECTING:
      if(t->isConnected())
	report_connect(nodeId);
      break;
    case DISCONNECTING:
      if(!t->isConnected())
	report_disconnect(nodeId, 0);
      break;
    }
  }
}

SendStatus
TransporterRegistry::prepareSend(const SignalHeader * const signalHeader, 
				 Uint8 prio,
				 const Uint32 * const signalData,
				 NodeId nodeId, 
				 class SectionSegmentPool & thePool,
				 const SegmentedSectionPtr ptr[3]){
  

  Transporter *t = theTransporters[nodeId];
  if(t != NULL && 
     (((ioStates[nodeId] != HaltOutput) && (ioStates[nodeId] != HaltIO)) || 
      ((signalHeader->theReceiversBlockNumber == 252)|| 
       (signalHeader->theReceiversBlockNumber == 4002)))) {
    
    if(t->isConnected()){
      Uint32 lenBytes = t->m_packer.getMessageLength(signalHeader, ptr);
      if(lenBytes <= MAX_MESSAGE_SIZE){
	Uint32 * insertPtr = t->getWritePtr(lenBytes, prio);
	if(insertPtr != 0){
	  t->m_packer.pack(insertPtr, prio, signalHeader, signalData, thePool, ptr);
	  t->updateWritePtr(lenBytes, prio);
	  return SEND_OK;
	}
	
	
	/**
	 * @note: on linux/i386 the granularity is 10ms
	 *        so sleepTime = 2 generates a 10 ms sleep.
	 */
	int sleepTime = 2;
	for(int i = 0; i<50; i++){
	  if((nSHMTransporters+nSCITransporters) == 0)
	    NdbSleep_MilliSleep(sleepTime); 
	  insertPtr = t->getWritePtr(lenBytes, prio);
	  if(insertPtr != 0){
	    t->m_packer.pack(insertPtr, prio, signalHeader, signalData, thePool, ptr);
	    t->updateWritePtr(lenBytes, prio);
	    break;
	  }
	}
	
	if(insertPtr != 0){
	  /**
	   * Send buffer full, but resend works
	   */
	  reportError(callbackObj, nodeId, TE_SEND_BUFFER_FULL);
	  return SEND_OK;
	}
	
	WARNING("Signal to " << nodeId << " lost(buffer)");
	reportError(callbackObj, nodeId, TE_SIGNAL_LOST_SEND_BUFFER_FULL);
	return SEND_BUFFER_FULL;
      } else {
	return SEND_MESSAGE_TOO_BIG;
      }
    } else {
      DEBUG("Signal to " << nodeId << " lost(disconnect) ");
      return SEND_DISCONNECTED;
    }
  } else {
    DEBUG("Discarding message to block: " 
	  << signalHeader->theReceiversBlockNumber 
	  << " node: " << nodeId);
    
    if(t == NULL)
      return SEND_UNKNOWN_NODE;
    
    return SEND_BLOCKED;
  }
}

// run as own thread
void
TransporterRegistry::start_clients_thread()
{
  int persist_mgm_count= 0;
  DBUG_ENTER("TransporterRegistry::start_clients_thread");
  while (m_run_start_clients_thread) {
    NdbSleep_MilliSleep(100);
    persist_mgm_count++;
    if(persist_mgm_count==50)
    {
      ndb_mgm_check_connection(m_mgm_handle);
      persist_mgm_count= 0;
    }
    for (int i= 0, n= 0; n < nTransporters && m_run_start_clients_thread; i++){
      Transporter * t = theTransporters[i];
      if (!t)
	continue;
      n++;

      const NodeId nodeId = t->getRemoteNodeId();
      switch(performStates[nodeId]){
      case CONNECTING:
	if(!t->isConnected() && !t->isServer) {
	  bool connected= false;
	  /**
	   * First, we try to connect (if we have a port number).
	   */
	  if (t->get_s_port())
	    connected= t->connect_client();

	  /**
	   * If dynamic, get the port for connecting from the management server
	   */
	  if( !connected && t->get_s_port() <= 0) {	// Port is dynamic
	    int server_port= 0;
	    struct ndb_mgm_reply mgm_reply;

	    if(!ndb_mgm_is_connected(m_mgm_handle))
	      ndb_mgm_connect(m_mgm_handle, 0, 0, 0);
	    
	    if(ndb_mgm_is_connected(m_mgm_handle))
	    {
	      int res=
		ndb_mgm_get_connection_int_parameter(m_mgm_handle,
						     t->getRemoteNodeId(),
						     t->getLocalNodeId(),
						     CFG_CONNECTION_SERVER_PORT,
						     &server_port,
						     &mgm_reply);
	      DBUG_PRINT("info",("Got dynamic port %d for %d -> %d (ret: %d)",
				 server_port,t->getRemoteNodeId(),
				 t->getLocalNodeId(),res));
	      if( res >= 0 )
	      {
		/**
		 * Server_port == 0 just means that that a mgmt server
		 * has not received a new port yet. Keep the old.
		 */
		if (server_port)
		  t->set_s_port(server_port);
	      }
	      else if(ndb_mgm_is_connected(m_mgm_handle))
	      {
		g_eventLogger.info("Failed to get dynamic port to connect to: %d", res);
		ndb_mgm_disconnect(m_mgm_handle);
	      }
	      else
	      {
		g_eventLogger.info("Management server closed connection early. "
			 "It is probably being shut down (or has problems). "
			 "We will retry the connection. %d %s %s line: %d",
                                   ndb_mgm_get_latest_error(m_mgm_handle),
                                   ndb_mgm_get_latest_error_desc(m_mgm_handle),
                                   ndb_mgm_get_latest_error_msg(m_mgm_handle),
                                   ndb_mgm_get_latest_error_line(m_mgm_handle)
                                   );
	      }
	    }
	    /** else
	     * We will not be able to get a new port unless
	     * the m_mgm_handle is connected. Note that not
	     * being connected is an ok state, just continue
	     * until it is able to connect. Continue using the
	     * old port until we can connect again and get a
	     * new port.
	     */
	  }
	}
	break;
      case DISCONNECTING:
	if(t->isConnected())
	  t->doDisconnect();
	break;
      default:
	break;
      }
    }
  }
  DBUG_VOID_RETURN;
//.........这里部分代码省略.........