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<HTML>
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<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META NAME="Author" CONTENT="Ambreen Ilyas">
<META NAME="GENERATOR" CONTENT="Mozilla/4.05 [en] (X11; I; SunOS 5.5.1 sun4u) [Netscape]">
<TITLE>Example 1</TITLE>
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<BODY>
<FONT COLOR="#CC0000">/////////////////////////////////////////////////////////////////////////////////////////////////////////////////</FONT>
<BR><FONT COLOR="#CC0000">//// This example is from the ACE Programmers
Guide.</FONT>
<BR><FONT COLOR="#CC0000">//// Chapter: "The Acceptor/Connector"
(Connection Initialization)</FONT>
<BR><FONT COLOR="#CC0000">//// For details please see the guide at</FONT>
<BR><FONT COLOR="#CC0000">//// http://www.cs.wustl.edu/~schmidt/ACE.html</FONT>
<BR><FONT COLOR="#CC0000">//// AUTHOR: Umar Syyid (usyyid@hns.com)</FONT>
<BR><FONT COLOR="#CC0000">//// and Ambreen Ilyas (ambreen@bitsmart.com)</FONT>
<BR><FONT COLOR="#CC0000">/////////////////////////////////////////////////////////////////////////////////////////////////////////////</FONT>
<P><FONT COLOR="#FF0000">//Example 1</FONT>
<BR><FONT COLOR="#000099">#include</FONT> <FONT COLOR="#006600">"ace/Reactor.h"</FONT>
<BR><FONT COLOR="#000099">#include</FONT><FONT COLOR="#006600"> "ace/Svc_Handler.h"</FONT>
<BR><FONT COLOR="#000099">#include</FONT> <FONT COLOR="#006600">"ace/Acceptor.h"</FONT>
<BR><FONT COLOR="#000099">#include</FONT><FONT COLOR="#006600"> "ace/Synch.h"</FONT>
<BR><FONT COLOR="#000099">#include </FONT><FONT COLOR="#006600">"ace/SOCK_Acceptor.h"</FONT>
<P><FONT COLOR="#FF0000">//Create a Service Handler whose open() method
will be called back automatically.</FONT>
<BR><FONT COLOR="#FF0000">//This class MUST derive from ACE_Svc_Handler
which is an interface and</FONT>
<BR><FONT COLOR="#FF0000">//as can be seen is a template container class
itself. The first parameter to //ACE_Svc_Handler is the underlying stream
that it may use for communication.</FONT>
<BR><FONT COLOR="#FF0000">//Since we are using TCP sockets the stream is
ACE_SOCK_STREAM.</FONT>
<BR><FONT COLOR="#FF0000">//The second is the internal synchronization
mechanism it could use.</FONT>
<BR><FONT COLOR="#FF0000">//Since we have a single threaded application
we pass it a "null" lock</FONT>
<BR><FONT COLOR="#FF0000">//which will do nothing.</FONT>
<P>class My_Svc_Handler:
<BR> public ACE_Svc_Handler <ACE_SOCK_STREAM,ACE_NULL_SYNCH>{
<BR><FONT COLOR="#FF0000">//the open method which will be called back automatically
after the</FONT>
<BR><FONT COLOR="#FF0000">//connection has been established</FONT>.
<P>public:
<BR>int open(void*){
<BR> cout<<?Connection established?<<endl;
<BR> }
<BR>};
<BR><FONT COLOR="#FF0000">// Create the acceptor as described above.</FONT>
<BR>typedef ACE_Acceptor<My_Svc_Handler,ACE_SOCK_ACCEPTOR> MyAcceptor;
<P>int main(int argc, char* argv[]){
<BR><FONT COLOR="#FF0000">//create the address on which we wish to
connect. The constructor takes</FONT>
<BR><FONT COLOR="#FF0000">//the port number on which to listen and will
automatically take the hosts</FONT>
<BR><FONT COLOR="#FF0000">//IP address as the IP Address for the addr object</FONT>
<P>ACE_INET_Addr addr(PORT_NUM);
<P><FONT COLOR="#FF0000">//instantiate the appropriate acceptor object
with the address on which we wish to</FONT>
<BR><FONT COLOR="#FF0000">//accept and the Reactor instance we want to
use. In this case we just use the global</FONT>
<BR><FONT COLOR="#FF0000">//ACE_Reactor singleton. (Read more about the
reactor in the previous chapter)</FONT>
<BR>MyAcceptor acceptor(address, ACE_Reactor::instance());
<P>while(1)
<BR><FONT COLOR="#FF0000"> // Start the reactors event loop</FONT>
<BR> ACE_Reactor::instance()->handle_events();
<BR>}
<P> <A HREF="ex02.html">Next Example</A>
<BR>
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