Remote_Invocation.h

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00001 // -*- C++ -*-
00002 
00003 //=============================================================================
00004 /**
00005  *  @file    Remote_Invocation.h
00006  *
00007  *  $Id: Remote_Invocation.h 80292 2007-12-17 20:38:32Z johnnyw $
00008  *
00009  *
00010  *  @author Balachandran Natarajan <bala@dre.vanderbilt.edu>
00011  */
00012 //=============================================================================
00013 
00014 #ifndef TAO_REMOTE_INVOCATION_H
00015 #define TAO_REMOTE_INVOCATION_H
00016 
00017 #include /**/ "ace/pre.h"
00018 
00019 #include "tao/Invocation_Base.h"
00020 #include "tao/Transport.h"
00021 
00022 #if !defined (ACE_LACKS_PRAGMA_ONCE)
00023 # pragma once
00024 #endif /* ACE_LACKS_PRAGMA_ONCE */
00025 
00026 TAO_BEGIN_VERSIONED_NAMESPACE_DECL
00027 
00028 class TAO_Operation_Details;
00029 class TAO_Target_Specification;
00030 class TAO_OutputCDR;
00031 
00032 namespace TAO
00033 {
00034   class Profile_Transport_Resolver;
00035   class Argument;
00036 
00037   /**
00038    * @class Remote_Invocation
00039    *
00040    * @brief Base class for remote invocations.
00041    *
00042    * This class encapulates some of the common functionalities used by
00043    * synchronous, asynchronous, DII and DSI invocations.
00044    *
00045    */
00046   class TAO_Export Remote_Invocation : public Invocation_Base
00047   {
00048   public:
00049     /**
00050      * @param otarget The original target on which this invocation
00051      * was started. This is there to be passed up to its parent
00052      * class.
00053      *
00054      * @param resolver The profile and transport holder.
00055      *
00056      * @param detail Pperation details of the invocation on the target
00057      *
00058      * @param response_expected Flag to indicate whether the
00059      * operation encapsulated by @a op returns a response or not.
00060      */
00061     Remote_Invocation (CORBA::Object_ptr otarget,
00062                        Profile_Transport_Resolver &resolver,
00063                        TAO_Operation_Details &detail,
00064                        bool response_expected);
00065 
00066   protected:
00067 
00068     /// Initialize the @a spec.
00069     void init_target_spec (TAO_Target_Specification &spec);
00070 
00071     /// Write the GIOP header into the stream.
00072     void write_header (TAO_OutputCDR &out_stream);
00073 
00074     /// Marshal the arguments into the stream.
00075     void marshal_data (TAO_OutputCDR &cdr);
00076 
00077     /// Write the message onto the socket
00078     Invocation_Status send_message (TAO_OutputCDR &cdr,
00079                                     TAO_Transport::TAO_Message_Semantics message_semantics,
00080                                     ACE_Time_Value *max_wait_time);
00081 
00082   protected:
00083     /// Our resolver
00084     Profile_Transport_Resolver &resolver_;
00085   };
00086 }
00087 
00088 TAO_END_VERSIONED_NAMESPACE_DECL
00089 
00090 #include /**/ "ace/post.h"
00091 
00092 #endif /*TAO_REMOTE_INVOCATION_H*/

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