完整一点的Reactor框架的udpserver

 #include "ace/OS_main.h"
#include "ace/OS_NS_string.h"
#include "ace/OS_NS_unistd.h"
#include "ace/Reactor.h"
#include "ace/Process.h"
#include "ace/SOCK_Dgram.h"
#include "ace/INET_Addr.h"
#include "ace/Log_Msg.h"
#include "ace/Thread_Manager.h"
#include "ace/Task_T.h"

#define SERVER_PORT 10101
static const size_t TASK_THREAD_POOL_SIZE = 10;

class Task_Worker: public ACE_Task
{
    public:
        virtual int svc(void)
        {
            while(1)
            {
                ACE_Message_Block *mb = NULL;
                if(this->getq(mb) == -1)
                {
                    continue;
                }
                process_task(mb);
            }
            return 0;
        }
    private:
        void process_task(ACE_Message_Block *mb)
        {
            mb->release();
        }
};

class Task_Manager: public ACE_Task
{
    public:
        virtual int svc(void)
        {
            Task_Worker task_tp;
            task_tp.activate(THR_NEW_LWP | THR_JOINABLE, TASK_THREAD_POOL_SIZE);
            while(1)
            {
                ACE_Message_Block *mb = NULL;
                if(this->getq(mb) < 0)
                {
                    task_tp.msg_queue()->deactivate();
                    task_tp.wait();
                }
                task_tp.putq(mb);
            }
            return 0;
        }
};

class Dgram_Endpoint : public ACE_Event_Handler
{
public:
  Task_Manager task_mgr;
  Dgram_Endpoint (const ACE_INET_Addr &local_addr);
  virtual ACE_HANDLE get_handle (void) const;
  virtual int handle_input (ACE_HANDLE handle);
  virtual int handle_timeout (const ACE_Time_Value & tv,const void *arg = 0);
  virtual int handle_close (ACE_HANDLE handle,ACE_Reactor_Mask close_mask);
  virtual int handle_signal (int signum, siginfo_t*, ucontext_t*);
  int send (const char *buf, size_t len, const ACE_INET_Addr &);

private:
  ACE_SOCK_Dgram endpoint_;
};

int Dgram_Endpoint::send (const char *buf,size_t len,const ACE_INET_Addr &addr)
{
  return this->endpoint_.send (buf, len, addr);
}

Dgram_Endpoint::Dgram_Endpoint (const ACE_INET_Addr &local_addr)
  : endpoint_(local_addr)
{
    task_mgr.activate();
}

ACE_HANDLE Dgram_Endpoint::get_handle (void) const
{
  return this->endpoint_.get_handle();
}

int Dgram_Endpoint::handle_close (ACE_HANDLE handle,ACE_Reactor_Mask)
{

    ACE_DEBUG((LM_DEBUG, "************handle_close***********/n"));
    ACE_UNUSED_ARG (handle);
    this->endpoint_.close();
    delete this;
    return 0;
}

int Dgram_Endpoint::handle_input (ACE_HANDLE)
{
  char buf[BUFSIZ];
  ACE_INET_Addr from_addr;
  char address[32];

  //ACE_DEBUG ((LM_DEBUG,"(%P|%t) activity occurred on handle %d!/n",this->endpoint_.get_handle ()));
  ssize_t nbytes = this->endpoint_.recv (buf, sizeof(buf), from_addr);
 
#if 0
  if (nbytes == -1)
    ACE_ERROR ((LM_ERROR,"%p","handle_input error/n"));
  else
    ACE_DEBUG ((LM_DEBUG, "[%d]bytes from[%s] received:%s/n", nbytes, address, buf));
#endif

  ACE_Message_Block *mb = NULL;
  ACE_NEW_RETURN(mb, ACE_Message_Block(nbytes, ACE_Message_Block::MB_DATA, 0, buf), -1);
  mb->wr_ptr(nbytes);
  this->task_mgr.putq(mb);
  return 0;
}

int Dgram_Endpoint::handle_timeout (const ACE_Time_Value &,const void *)
{
  ACE_DEBUG ((LM_DEBUG,"(%P|%t) timed out for endpoint/n"));
  return 0;
}
int Dgram_Endpoint::handle_signal (int signum, siginfo_t* siginfo, ucontext_t* context)
{
    return ACE_Event_Handler::handle_signal (signum, siginfo, context);
}
int main (int argc, char *argv[])
{
    ACE_INET_Addr local_addr(SERVER_PORT);
    Dgram_Endpoint *endpoint;

    ACE_NEW_RETURN (endpoint,Dgram_Endpoint (local_addr),-1);

    if (ACE_Reactor::instance ()->register_handler(endpoint,ACE_Event_Handler::READ_MASK) == -1)
    {
        ACE_ERROR_RETURN ((LM_ERROR,"ACE_Reactor::register_handler"),-1);
    }
#if 0
    if (-1 == ACE_Reactor::instance()->register_handler(SIGINT, endpoint))
    {
        ACE_ERROR_RETURN((LM_ERROR, "fail to register SIGINT handler"), -1);
    }
    ACE_Time_Value time_out(5);
    ACE_Reactor::instance()->schedule_timer(&callback, (void *)"time out",  ACE_Time_Value::zero, time_out);
#endif
    ACE_Reactor::instance()->run_event_loop();
  return 0;
}