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/* -*- C++ -*- */
// $Id$
#include "ace/Service_Config.h"
#include "Event_Channel.h"
#include "Gateway.h"
class Gateway : public ACE_Service_Object
// = TITLE
// Integrates the whole Gateway application.
//
// = DESCRIPTION
// This implementation uses the <ACE_Event_Channel> as the basis
// for the <Gateway> routing.
{
public:
// = Service configurator hooks.
virtual int init (int argc, char *argv[]);
// Perform initialization.
virtual int fini (void);
// Perform termination.
virtual int info (char **, size_t) const;
// Return info about this service.
protected:
int handle_input (ACE_HANDLE);
// Shut down the Gateway when input comes in from the controlling
// console.
int handle_signal (int signum, siginfo_t * = 0, ucontext_t * = 0);
// Shut down the Gateway when a signal arrives.
int parse_args (int argc, char *argv[]);
// Parse gateway configuration arguments obtained from svc.conf
// file.
ACE_Event_Channel<SUPPLIER_HANDLER, CONSUMER_HANDLER> event_channel_;
// The Event Channel routes events from Supplier(s) to Consumer(s).
};
// Convenient shorthands.
// #define IC SUPPLIER_HANDLER
// #define OC CONSUMER_HANDLER
int
Gateway::handle_signal (int signum, siginfo_t *, ucontext_t *)
{
if (signum > 0)
ACE_DEBUG ((LM_DEBUG, "(%t) %S\n", signum));
// Shut down the main event loop.
ACE_Service_Config::end_reactor_event_loop ();
return 0;
}
int
Gateway::handle_input (ACE_HANDLE h)
{
if (ACE_Service_Config::reactor ()->remove_handler
(0, ACE_Event_Handler::READ_MASK | ACE_Event_Handler::DONT_CALL) == -1)
ACE_ERROR_RETURN ((LM_ERROR, "(%t) %p\n", "remove_handler"), -1);
char buf[BUFSIZ];
// Consume the input...
ACE_OS::read (h, buf, sizeof (buf));
// Shut us down.
return this->handle_signal (h);
}
int
Gateway::init (int argc, char *argv[])
{
if (this->event_channel_.open (argc, argv) == -1)
ACE_ERROR_RETURN ((LM_ERROR, "(%t) %p\n", "open"), -1);
ACE_Sig_Set sig_set;
sig_set.sig_add (SIGINT);
sig_set.sig_add (SIGQUIT);
// Register ourselves to receive SIGINT and SIGQUIT
// so we can shut down gracefully via signals.
if (ACE_Service_Config::reactor ()->register_handler
(sig_set, this) == -1)
ACE_ERROR_RETURN ((LM_ERROR, "(%t) %p\n", "register_handler"), -1);
if (ACE_Service_Config::reactor ()->register_handler
(0, this, ACE_Event_Handler::READ_MASK) == -1)
ACE_ERROR_RETURN ((LM_ERROR, "(%t) %p\n", "register_handler"), -1);
return 0;
}
// This method is automatically called when the gateway is shutdown.
// It closes down the Event Channel.
int
Gateway::fini (void)
{
this->event_channel_.close ();
return 0;
}
// Returns information on the currently active service.
int
Gateway::info (char **strp, size_t length) const
{
char buf[BUFSIZ];
ACE_OS::sprintf (buf, "%s\t %s", "Gateway daemon",
"# Application-level gateway\n");
if (*strp == 0 && (*strp = ACE_OS::strdup (buf)) == 0)
return -1;
else
ACE_OS::strncpy (*strp, buf, length);
return ACE_OS::strlen (buf);
}
// The following is a "Factory" used by the ACE_Service_Config and
// svc.conf file to dynamically initialize the state of the Gateway.
ACE_SVC_FACTORY_DEFINE (Gateway)
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