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// $Id$
// ===========================================================
//
//
// = LIBRARY
// TAO/examples/Callback_Quoter
//
// = FILENAME
// Consumer_Input_Handler.cpp
//
// = DESCRIPTION
// Implementation of the Consumer_Input_Handler class.
//
// = AUTHOR
// Kirthika Parameswaran <kirthika@cs.wustl.edu>
//
// ===========================================================
#include "Consumer_Input_Handler.h"
#include "ace/Read_Buffer.h"
#include "ace/OS.h"
Consumer_Input_Handler::Consumer_Input_Handler (Consumer_Handler *consumer_handler)
{
consumer_handler_ = consumer_handler;
}
int
Consumer_Input_Handler::handle_input (ACE_HANDLE)
{
char buf[BUFSIZ];
// The string could read contains \n\0 hence using ACE_OS::read
// which returns the no of bytes read and hence i can manipulate
// and remove the devil from the picture i.e '\n' ! ;)
ssize_t strlen = ACE_OS::read (ACE_STDIN,
buf,
sizeof buf);
if (buf[strlen -1] == '\n')
buf[strlen -1] = '\0';
switch (tolower (buf[0]))
{
case Consumer_Input_Handler::REGISTER:
{
this->register_consumer ();
break;
}
case Consumer_Input_Handler::UNREGISTER:
{
this->unregister_consumer ();
break;
}
case Consumer_Input_Handler::EXIT:
{
this->quit_consumer_process ();
break;
}
}
return 0;
}
int
Consumer_Input_Handler::register_consumer ()
{
// Get the stockname the consumer is interested in.
static char stockname[BUFSIZ];
ACE_DEBUG ((LM_DEBUG,
"Stockname?"));
ssize_t strlen = ACE_OS::read (ACE_STDIN,
stockname,
sizeof stockname - 1);
// Taking care of platforms where an carriage return is padded with newline.
if (stockname[strlen -2] == '\n' || stockname[strlen -2] == '\r')
stockname[strlen -2] = '\0';
else
if (stockname[strlen -1] == '\n' || stockname[strlen -1] == '\r')
stockname[strlen -1] = '\0';
this->consumer_handler_->stock_name_ = stockname;
// Get the threshold value.
char needed_stock_value[BUFSIZ];
ACE_DEBUG ((LM_DEBUG,
"Threshold Stock value?"));
strlen = ACE_OS::read (ACE_STDIN,
needed_stock_value,
sizeof needed_stock_value);
if (needed_stock_value[strlen -1] == '\n')
needed_stock_value[strlen -1] = '\0';
this->consumer_handler_->threshold_value_ =
ACE_OS::atoi (needed_stock_value);
ACE_DECLARE_NEW_CORBA_ENV;
ACE_TRY
{
// Register with the server.
this->consumer_handler_->server_->register_callback (this->consumer_handler_->stock_name_,
this->consumer_handler_->threshold_value_,
this->consumer_handler_->consumer_var_.in (),
ACE_TRY_ENV);
ACE_TRY_CHECK;
// Note the registration.
consumer_handler_->registered_ = 1;
consumer_handler_->unregistered_ = 0;
// @@ Up to this point..
ACE_DEBUG ((LM_DEBUG,
"registeration done!\n"));
}
ACE_CATCHANY
{
ACE_PRINT_EXCEPTION (ACE_ANY_EXCEPTION,"Consumer_Input_Handler::register_consumer()\n");
return -1;
}
ACE_ENDTRY;
ACE_CHECK_RETURN (-1);
return 0;
}
int
Consumer_Input_Handler::unregister_consumer ()
{
// Only if the consumer is registered can the
// unregistration take place.
if (consumer_handler_->registered_ == 1)
{
this->consumer_handler_->server_->unregister_callback (this->consumer_handler_->consumer_var_.in());
ACE_DEBUG ((LM_DEBUG,
" Consumer Unregistered \n "));
consumer_handler_->unregistered_ = 1;
consumer_handler_->registered_ = 0;
}
else
ACE_DEBUG ((LM_DEBUG,
" Invalid Operation: Consumer not Registered\n"));
return 0;
}
int
Consumer_Input_Handler::quit_consumer_process ()
{
// Only if the consumer is registered and wants to shut
// down, its necessary to unregister and then shutdown.
ACE_DECLARE_NEW_CORBA_ENV;
ACE_TRY
{
if (consumer_handler_->unregistered_ != 1 && consumer_handler_->registered_ == 1)
{
// If the notifier has exited and the consumer tries to call
// the unregister_callback method tehn an execption will be
// raised. Hence check for this case using ACE_TRY_ENV.
this->consumer_handler_->server_->unregister_callback (this->consumer_handler_->consumer_var_.in (),
ACE_TRY_ENV);
ACE_TRY_CHECK;
ACE_DEBUG ((LM_DEBUG,
" Consumer Unregistered \n "));
consumer_handler_->unregistered_ = 0;
consumer_handler_->registered_ = 0;
}
this->consumer_handler_->consumer_servant_->shutdown (ACE_TRY_ENV);
ACE_TRY_CHECK;
}
ACE_CATCHANY
{
this->consumer_handler_->consumer_servant_->shutdown (ACE_TRY_ENV);
// There would be an exception only if there is a communication
// failure between the notifier and consumer. On catching the
// exception proclaim the problem and do a graceful exit.
ACE_PRINT_EXCEPTION (ACE_ANY_EXCEPTION,
"Communication failed!\n");
return -1;
}
ACE_ENDTRY;
ACE_CHECK_RETURN (-1);
return 0;
}
Consumer_Input_Handler::~Consumer_Input_Handler (void)
{
// No-op
}
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