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