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This is an short example to show how to integrate TAO and MFC base GUI
applications. The server is an MFC-based GUI application, which
spawns an additional thread to invoke the ORBs event queue. The
client is a Win32 console application.
The following are the steps used to integrate a Win32-GUI application
and TAO by adding an additional thread for the ORB:
Step 1: Creating a MFC-Application wizard-based project
Step 2: Set the following project settings
- C++ Settings / Preprocessor
ACE_HAS_DLL=1, ACE_HAS_MFC=1
- Use the MFC-based librarys of ACE & TAO
e.g. link acemfcd.lib TAOmfcd.lib for the Debug-version!
Step 3: Add a threadfunction for the ORB
The ORB has to be started in a separat thread. So introduce a
threadfunction to spawn a separate thread by
e.g. ACE-Thread-Manager. In this function you implement all
the necessary stuff to start an ORB!
Step 4: Add the thread invocation in the Application
- Initialize ACE
- Spawn the thread for the ORB
At first you have to initialize ACE by calling
ACE::init()
as soon as possible in your application. Good places are in
the constructor or in the InitInstance() memberfunction of the
application-calls. In addition you have to spawn the thread
to run the ORB, e.g. ACE_Thread_Manager::instance()->spawn
(spawn_my_orb_thread);
Step 5: Overwrite the default destructor of the Application-Class
- Get a reference to the ORB use in the thread
- Shut down the ORB
- Wait for the shutdown of the ORB-thread
- Call ACE::fini() to close the ACE::init()-call
To shut down the ORB in it's separate thread you need to call
the ORB::shutdown() method of the ORB references in the
thread. To get an reference to this special ORB create an
additional CORBA::ORB_var and initialize it the the same
ORB-name than you initialized the ORB in the thread. So you
get a reference to the same ORB.
Have fun,
Martin Botzler <martin.botzler@mchp.siemens.de>
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