Writing a Message Handler Plug-in Finalize Function

The message handler plug-in finalize function (ffh_mh_fini_function) for the message handler releases and cleans up any resources used by your message handler plug-in.

1. Cast the user_data field of the ffh_mh_info to a pointer to your message handling class, if you created one during the initialization.
2. Invoke the finalize method on the message handler object.
3. Delete the handler object and set the user_data pointer in ffh_mh_info to null.

extern "C" void finalizeHandler( ffh_mh_info * info )
{
    (( FIXMessageHandler*)info->user_data)->finalize();
    delete ( FIXMessageHandler*)info->user_data;
    info->user_data = NULL;
}

void FIXMessageHandler::finalize()
{
    // release Publisher API
    pub_shutdown( true );

    // release other plug-in resources
    if( _msg_ctx != NULL ){
        delete _msg_ctx;
        _msg_ctx = NULL;
    }
    _handlerInfo = NULL;
}