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<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META NAME="Author" CONTENT="James CE Johnson">
<TITLE>ACE Tutorial 015</TITLE>
</HEAD>
<BODY TEXT="#000000" BGCOLOR="#FFFFFF" LINK="#000FFF" VLINK="#FF0F0F">
<CENTER><B><FONT SIZE=+2>ACE Tutorial 015</FONT></B></CENTER>
<CENTER><B><FONT SIZE=+2>Building a protocol stream</FONT></B></CENTER>
<P>
<HR WIDTH="100%">
The Server object exists in order simplify the
main() application level. To that end, it hides the details of
creating an acceptor and managing the reactor.
<P>
The static close() method available for a signal handler as you saw on
the previous page. Of course the assumption here is that there would
only be one Server instance but since you can't provide a TCP/IP port,
that's probably a valid assumption!
<HR>
<PRE>
<font color=red>// $Id$</font>
<font color=blue>#ifndef</font> <font color=purple>SERVER_H</font>
<font color=blue>#define</font> <font color=purple>SERVER_H</font>
<font color=blue>#include</font> "<font color=green>ace/Acceptor.h</font>"
<font color=blue>#if !defined</font> (<font color=purple>ACE_LACKS_PRAGMA_ONCE</font>)
# pragma once
<font color=blue>#endif</font> <font color=red>/* ACE_LACKS_PRAGMA_ONCE */</font>
<font color=blue>#include</font> "<font color=green>ace/SOCK_Acceptor.h</font>"
<font color=blue>#include</font> "<font color=green>Handler.h</font>"
<font color=red>/* Anytime I have templates I try to remember to create a typedef for
the parameterized object. It makes for much less typing later!
*/</font>
typedef ACE_Acceptor < Handler, ACE_SOCK_ACCEPTOR > Acceptor;
class Server
{
public:
<font color=red>// Our simple constructor takes no parameters. To make the</font>
<font color=red>// server a bit more useful, you may want to pass in the</font>
<font color=red>// TCP/IP port to be used by the acceptor.</font>
Server(void);
~Server(void);
<font color=red>// Open the server for business</font>
int open(void);
<font color=red>// Close all server instances by setting the finished_ flag.</font>
<font color=red>// Actually, the way this class is written, you can only have</font>
<font color=red>// one instance.</font>
static int close(void);
<font color=red>// Run the server's main loop. The use of the gloabl</font>
<font color=red>// ACE_Reactor by this method is what limits us to one Server</font>
<font color=red>// instance.</font>
int run(void);
private:
<font color=red>// This will accept client connection requests and instantiate</font>
<font color=red>// a Handler object for each new connection.</font>
Acceptor acceptor_;
<font color=red>// Our shutdown flag</font>
static sig_atomic_t finished_;
};
<font color=blue>#endif</font> <font color=red>// SERVER_H</font>
</PRE>
<P><HR WIDTH="100%">
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