docs/tutorials/Chap_6/ex02.html


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   <TITLE>Example 2</TITLE>
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<FONT COLOR="#CC0000">/////////////////////////////////////////////////////////////////////////////////////////////////////////////////</FONT>
<BR><FONT COLOR="#CC0000">//// This example is from the ACE Programmers
Guide.</FONT>
<BR><FONT COLOR="#CC0000">////&nbsp; Chapter:&nbsp; "The Acceptor/Connector"&nbsp;
(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">////&nbsp; 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="#CC0000">//Example 2</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>
<BR><FONT COLOR="#000099">#define</FONT> <FONT COLOR="#663366">PORT_NUM
10101</FONT>
<BR><FONT COLOR="#000099">#define</FONT><FONT COLOR="#663366"> DATA_SIZE
12</FONT>

<P><FONT COLOR="#FF0000">//forward declaration</FONT>
<BR>class My_Svc_Handler;

<P><FONT COLOR="#FF0000">//Create the Acceptor class</FONT>
<BR>typedef ACE_Acceptor&lt;My_Svc_Handler,ACE_SOCK_ACCEPTOR> MyAcceptor;

<P><FONT COLOR="#FF0000">//Create a service handler similar to as seen
in example 1.</FONT>
<BR><FONT COLOR="#FF0000">//Except this time include the handle_input()
method which will be</FONT>
<BR><FONT COLOR="#FF0000">//called back automatically by the reactor when
new data arrives</FONT>
<BR><FONT COLOR="#FF0000">//on the newly established connection</FONT>
<BR>class My_Svc_Handler:
<BR>&nbsp;public ACE_Svc_Handler &lt;ACE_SOCK_STREAM,ACE_NULL_SYNCH>{
<BR>public:
<BR>My_Svc_Handler(){
<BR>&nbsp;data= new char[DATA_SIZE];
<BR>&nbsp;}
<BR>int open(void*){
<BR>&nbsp;ACE_DEBUG((LM_DEBUG,"Connection established"));

<P><FONT COLOR="#FF0000">&nbsp;//Register the service handler with the
reactor</FONT>
<BR>&nbsp;ACE_Reactor::instance()->register_handler(this,
<BR>&nbsp;ACE_Event_Handler::READ_MASK);
<BR>&nbsp;return 0;
<BR>&nbsp;}

<P>int handle_input(ACE_HANDLE){
<BR>&nbsp;<FONT COLOR="#FF0000">//After using the peer() method of ACE_Svc_Handler
to obtain a</FONT>
<BR><FONT COLOR="#FF0000">//reference to the underlying stream of the service
handler class</FONT>
<BR><FONT COLOR="#FF0000">//we call recv_n() on it to read the data which
has been received.</FONT>
<BR><FONT COLOR="#FF0000">//This data is stored in the data array and then
printed out</FONT>
<BR>&nbsp;peer().recv_n(data,DATA_SIZE);
<BR>&nbsp;ACE_OS::printf("&lt;&lt; %s\n",data);

<P>&nbsp;<FONT COLOR="#FF0000">//keep yourself registered with the reactor</FONT>
<BR>&nbsp; return 0;
<BR>&nbsp;}
<BR>private:
<BR>&nbsp;char* data;
<BR>};

<P>int main(int argc, char* argv[]){
<BR>&nbsp;ACE_INET_Addr addr(PORT_NUM);
<BR><FONT COLOR="#FF0000">&nbsp;//create the acceptor</FONT>
<BR>&nbsp;MyAcceptor acceptor(addr, <FONT COLOR="#FF0000">//address to
accept on</FONT>
<BR>&nbsp; ACE_Reactor::instance()); <FONT COLOR="#FF0000">//the reactor
to use</FONT>

<P>while(1)
<BR><FONT COLOR="#FF0000">&nbsp;//Start the reactor?s event loop</FONT>
<BR>&nbsp;ACE_Reactor::instance()->handle_events();
<BR>}

<P>&nbsp;<A HREF="ex03.html">Next Example</A>
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