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// $Id$
// ===========================================================
//
// = LIBRARY
// TAO/examples/Callback_Quoter
//
// = FILENAME
// Supplier_i.cpp
//
// = DESCRIPTION
// Implementation of the Supplier_i class. This class is the servant
// object for the callback quoter server.
//
// = AUTHOR
// Kirthika Parameswaran <kirthika@cs.wustl.edu>
//
// ===========================================================
#include "Supplier_i.h"
Supplier_i::Supplier_i (void)
{
// No-op
}
Supplier_i::~Supplier_i (void)
{
// No-op
}
// Register a distributed callback handler that is invoked when the
// given stock reaches the desired threshold value.
void
Supplier_i::register_callback (const char *stock_name,
CORBA::Long threshold_value,
Callback_Quoter::Consumer_ptr consumer_handler,
CORBA::Environment &TAO_TRY_ENV)
{
// Store the client information.
Consumer_Data consumer_data;
// necessary to make another copy of the consumer_handler using <_duplicate>
// so that we dont lose the consumer object reference after the method
// invocation is done.
consumer_data.consumer_ = Callback_Quoter::Consumer::_duplicate (consumer_handler);
consumer_data.desired_value_= threshold_value;
CONSUMERS *consumers = 0;
if (this->consumer_map_.find (stock_name, consumers) == 0)
{
consumers->insert (consumer_data);
}
else
{
consumers = new CONSUMERS;
consumers->insert (consumer_data);
this->consumer_map_.bind (stock_name, consumers);
}
}
void
Supplier_i::orb (CORBA::ORB_ptr orb)
{
this->orb_ = orb;
}
// Remove the client handler.
void
Supplier_i::unregister_callback (Callback_Quoter::Consumer_ptr consumer_handler,
CORBA::Environment &TAO_TRY_ENV)
{
for (CONSUMER_MAP::ITERATOR iter = this->consumer_map_.begin ();
iter!= this->consumer_map_.end ();
iter ++)
{
// the *iter is nothing but the stockname + unbounded set
// of consumers+threshold values, i.e a ACE_Hash_Map_Entry.
CONSUMERS *consumers;
Consumer_Data consumer_to_remove;
consumer_to_remove.consumer_ = consumer_handle;
(*iter).consumers->remove (consumer_to_remove);
// the remove method will do a find internally using
// operator == which will check only the consumer pointers.
// If match found it will be removed from the set.
}
}
// gets the market status and sends the information to
// the consumer who is interested in it.
void
Supplier_i::market_status (const char *stock_name,
CORBA::Long stock_value,
CORBA::Environment &TAO_TRY_ENV)
{
ACE_DEBUG ((LM_DEBUG,
"Supplier:: The stockname is %s with price %d\n",
stock_name,
stock_value));
// Go through the list of <Consumer_Data> to find which registered
// client wants to be notified.
CONSUMERS *consumers;
if (this->consumer_map_.find (stock_name, consumers) == 0)
{
for (CONSUMERS::ITERATOR iter = consumers->begin ();
iter != consumers->end ();
iter++)
{
// Check whether the stockname is equal before proceeding further.
if (stock_value >= (*iter).desired_value_)
{
Callback_Quoter::Info interested_consumer_data;
interested_consumer_data.stock_name = CORBA::string_dup (stock_name);
interested_consumer_data.value = stock_value;
(*iter).consumer_->push (interested_consumer_data);
}
}
}
}
void
Supplier_i::shutdown (CORBA::Environment &)
{
ACE_DEBUG ((LM_DEBUG,
"\n%s\n",
"The Callback Quoter server is shutting down"));
// Instruct the ORB to shutdown.
this->orb_->shutdown ();
}
int
Supplier_i::Consumer_Data::operator== (const Consumer_Data &rhs)
{
// The <_is_equivalent> function checks if the _var and _ptr objects
// are the same. NOTE: this call might not behave well on other
// ORBs since <_is_equivalent> isn't guaranteed to differentiate
// object references.
return this->consumer_->_is_equivalent (rhs.consumer_.in ());
}
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