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// $Id$
/**
* @file Distributor_i.h
* @author Shanshan Jiang <shanshan.jiang@vanderbilt.edu>
* @author William R. Otte <wotte@dre.vanderbilt.edu>
* @author Douglas C. Schmidt <schmidt@dre.vanderbilt.edu>
*/
#ifndef DISTRIBUTORI_H_
#define DISTRIBUTORI_H_
// local headers
#include "DistributorS.h"
#include "Stock_Database.h"
// ACE headers
#include "ace/Task.h"
#include "ace/Event_Handler.h"
#include "tao/RTPortableServer/RTPortableServer.h"
// STL headers
#include <map>
#include <vector>
#if !defined (ACE_LACKS_PRAGMA_ONCE)
#pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
/**
* @class StockDistributor_i
* @brief This class defined the Stock Distributor server.
*/
class StockDistributor_i
: public virtual POA_Stock::StockDistributor,
public virtual ACE_Task_Base
{
public:
/**
* Constructor.
*
* @param orb
* @param policy_list The policy list use to create StockQuoter_POA.
*/
StockDistributor_i (RTPortableServer::POA_ptr poa);
/// Destructor
virtual ~StockDistributor_i (void);
/**
* Insert StockNameConsumer object and its priority into the StockDistributor
* object's subscribers' map.
*
* @param c The StockNameConsumer object to be inserted into the StockDistributor
* object's subscribers' map.
* @param priority The priority of the StockNameConsumer object.
* @return A Cookie object that records this subscription.
*/
virtual ::Stock::Cookie * subscribe_notifier (::Stock::StockNameConsumer_ptr c,
::RTCORBA::Priority priority);
/**
* Erase the StockNameConsumer object from the StockDistributor object's subscribers' map.
*
* @param ck The Cookie object that records the subscription.
* @param The reference of the StockNameConsumer object that has been erased.
*/
virtual ::Stock::StockNameConsumer_ptr unsubscribe_notifier (::Stock::Cookie *ck);
/**
* Return the StockQuoter object created by the Constructor.
*
* @return A StockQuoter object created by this StockDistributor object.
*/
virtual ::Stock::StockQuoter_ptr provide_quoter_info (::Stock::Cookie *ck);
/**
* Get the notification_rate attribute.
*
* @return The notification_rate attribute.
*/
virtual ::CORBA::Long notification_rate ();
/**
* Set the notification_rate attribute.
*
* @param notification_rate The value of notification_rate attribute that need to be set.
*/
virtual void notification_rate (::CORBA::Long notification_rate);
/**
* Set the active state of the StockDistributor object to true and create a thread
* to publish the stock information to the Stock Broker clients.
*/
virtual void start (void);
/**
* Set the active state of StockDistributor object to false.
*/
virtual void stop (void);
virtual void shutdown ();
/// Callback for stock database.
void operator () (std::vector <std::string> &stocks);
int svn (void);
/// The map that stores the subscribed StockNameConsumer object.
typedef std::map <std::string,
std::pair <Stock::StockNameConsumer_var,
RTCORBA::Priority> > CookieMap;
private:
/// Notification rate for distributor in seconds.
CORBA::Long rate_;
CookieMap subscribers_list_;
/// This lock serializes access to the subscriber list.
ACE_RW_Thread_Mutex lock_;
/// The active state of the StockDistributor object.
bool active_;
/// Cache a copy of the RTCORBA::POA.
RTPortableServer::POA_var rt_poa_;
/// Cache a copy of the CORBA::ORB.
CORBA::ORB_var orb_;
};
/**
* @class StockQuoter_i
* @brief This class is used by brokers to get detailed stock information.
*/
class StockQuoter_i
: public virtual POA_Stock::StockQuoter
{
public:
/// Constructor.
StockQuoter_i (void);
/// Destructor.
virtual ~StockQuoter_i (void);
/**
* Get detailed stock information.
*
* @param stock_name The name of the stock whose detailed info is needed.
* @throw ::Stock::Invalid_Stock
*/
virtual ::Stock::StockInfo *get_stock_info (const char *stock_name);
};
/**
* @class StockDistributorHome_i
* @brief This servant defines the Stock Distributor home.
*/
class StockDistributorHome_i
: public virtual POA_Stock::StockDistributorHome,
public ACE_Event_Handler
{
public:
/**
* Constructor.
* Register the necessary factories and mappings with the specified orb and
* Create a new instance of the StockDistributor object.
*
* @param orb
*/
StockDistributorHome_i (CORBA::ORB_ptr orb);
/// Destructor
virtual ~StockDistributorHome_i (void);
/**
* Return the StockDistributor object created by the Constructor.
*
* @return The StockDistributor object created by the Constructor.
*/
virtual ::Stock::StockDistributor_ptr create ();
virtual int handle_signal (int signum,
siginfo_t * = 0,
ucontext_t * = 0);
private:
void create_distributor (void);
/// Cached ORB used to shut down the system
CORBA::ORB_var orb_;
/// Cached POA created during object construction
RTPortableServer::POA_var rt_poa_;
/// The StockDistributor servant created by its home.
PortableServer::ObjectId_var dist_id_;
};
// Define typedefs for our version of the stock database.
typedef ACE_Singleton<Stock_Database<StockDistributor_i>, TAO_SYNCH_MUTEX> Stock_Database_Singleton;
#define STOCK_DATABASE Stock_Database_Singleton::instance()
#endif /* DISTRIBUTORI_H_ */
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