TAO/examples/Callback_Quoter/Supplier_Timer_Handler.h

   1 /* -*- C++ -*- */
   2
   3 //=============================================================================
   4 /**
   5  *  @file    Supplier_Timer_Handler.h
   6  *
   7  *  Definition of the Supplier_Timer_Handler class.
   8  *
   9  *  @author Kirthika Parameswaran <kirthika@cs.wustl.edu>
  10  */
  11 //=============================================================================
  12
  13
  14 #ifndef SUPPLIER_TIMER_HANDLER_H
  15 #define SUPPLIER_TIMER_HANDLER_H
  16 #include "ace/Reactor.h"
  17 #include "ace/Timer_Queue.h"
  18 #include "ace/Event_Handler.h"
  19 #include "Supplier_i.h"
  20
  21 #if !defined (ACE_LACKS_PRAGMA_ONCE)
  22 # pragma once
  23 #endif /* ACE_LACKS_PRAGMA_ONCE */
  24
  25 class Supplier;
  26
  27 /**
  28  * @class Supplier_Timer_Handler
  29  *
  30  * @brief Feeds stock information to the Callback Quoter notifier
  31  * periodically.
  32  * = Description
  33  * Create a class to handle timer events.  Since only timer events
  34  * need to be handled, only the handle_timeout method is overlaoded.
  35  */
  36 class Supplier_Timer_Handler : public ACE_Event_Handler
  37 {
  38 public:
  39   /// Initilization.
  40   Supplier_Timer_Handler (Supplier *supplier,
  41                           ACE_Reactor *reactor,
  42                           FILE *file_ptr);
  43
  44   /// Destructor.
  45   ~Supplier_Timer_Handler (void);
  46
  47   /// Method which will be called by the Reactor when timeout occurs.
  48   virtual int handle_timeout (const ACE_Time_Value &tv,
  49                               const void *arg = 0);
  50
  51 private:
  52
  53   /// The values of the stock and its rate are got from the file.
  54   int get_stock_information (void);
  55
  56   /// The supplier instance.
  57   Supplier *supplier_obj_;
  58
  59   /// Reactor used by the supplier.
  60   ACE_Reactor *reactor_;
  61
  62   /// The file handle of the file from where the stock input is obtained.
  63   FILE* file_ptr_;
  64
  65   /// The name of the stock.
  66   char stockname_[BUFSIZ];
  67
  68   /// The market value of the stock.It will be typecasted to long later.
  69   long value_;
  70 };
  71
  72 #endif /* SUPPLIER_TIMER_HANDLER_H */