Author: James CE Johnson
Description: A first step towards using ACE productively

ACE Tutorial 007
Creating a thread-pool server

Something new this time is client_acceptor.cpp. I finally had enough code to move it out of the header.

    // page04.html,v 1.8 1999/04/03 21:56:25 jcej Exp

    #include "client_acceptor.h"

    /* Construct ourselves with the chosen concurrency strategy.  Notice
       that we also set our Thread_Pool reference to our private instance.  */
    Client_Acceptor::Client_Acceptor (int concurrency)
      : concurrency_ (concurrency),
        the_thread_pool_ (private_thread_pool_)
    {
    }

    /* Construct ourselves with a reference to somebody else' Thread_Pool.
       Obvioulsy our concurrency strategy is "thread_pool_" at this point.  */
    Client_Acceptor::Client_Acceptor (Thread_Pool &thread_pool)
      : concurrency_ (thread_pool_),
        the_thread_pool_ (thread_pool)
    {
    }

    /* When we're destructed, we may need to cleanup after ourselves.  If
       we're running with a thread pool that we own, it is up to us to
       close it down.  */
    Client_Acceptor::~Client_Acceptor (void)
    {
      if (this->concurrency() == thread_pool_ && thread_pool_is_private ())
        thread_pool ()->close ();
    }

    /* Similar to the destructor (and close() below) it is necessary for
       us to open the thread pool in some circumstances.

       Notice how we delegate most of the open() work to the open() method
       of our baseclass.  */
    int
    Client_Acceptor::open (const ACE_INET_Addr &addr,
                           ACE_Reactor *reactor,
                           int pool_size)
    {
      if (this->concurrency() == thread_pool_ && thread_pool_is_private ())
        thread_pool ()->open (pool_size);

      return inherited::open (addr, reactor);
    }

    /* Here again we find that we have to manage the thread pool.  Like
       open() we also delegate the other work to our baseclass.  */
    int
    Client_Acceptor::close (void)
    {
      if (this->concurrency() == thread_pool_ && thread_pool_is_private ())
        thread_pool ()->close ();

      return inherited::close ();
    }

Nothing really surprising here. Most of it just manages the Thread_Pool.

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