TAO/orbsvcs/DevGuideExamples/EventServices/RTEC_MCast_Federated/EchoEventConsumerMain.cpp

   1 // EchoEventConsumerMain.cpp
   2 // Main program for a PushConsumer of Echo events.
   3
   4 #include "EchoEventConsumer_i.h"
   5
   6 #include "orbsvcs/RtecEventCommC.h"
   7 #include "orbsvcs/RtecEventChannelAdminC.h"
   8 #include "orbsvcs/Time_Utilities.h"
   9 #include "orbsvcs/Event_Utilities.h"
  10 #include "orbsvcs/CosNamingC.h"
  11
  12 #include <iostream>
  13 const RtecEventComm::EventSourceID MY_SOURCE_ID  = ACE_ES_EVENT_SOURCE_ANY + 1;
  14 const RtecEventComm::EventType     MY_EVENT_TYPE = ACE_ES_EVENT_UNDEFINED + 1;
  15
  16 const int EVENT_LIMIT = 20;
  17
  18 int ACE_TMAIN (int argc, ACE_TCHAR *argv[])
  19 {
  20   try
  21   {
  22     // Initialize the ORB.
  23     CORBA::ORB_var orb = CORBA::ORB_init(argc, argv);
  24
  25     const ACE_TCHAR* ecname = ACE_TEXT ("EventService");
  26     for (int i = 0; argv[i] != 0; i++) {
  27       if (ACE_OS::strcmp(argv[i], ACE_TEXT("-ecname")) == 0) {
  28         if (argv[i+1] != 0) {
  29           ecname = argv[i+1];
  30         } else {
  31           std::cerr << "Missing Event channel name" << std::endl;
  32         }
  33       }
  34     }
  35
  36     // Find the Naming Service.
  37     CORBA::Object_var obj = orb->resolve_initial_references("NameService");
  38     CosNaming::NamingContextExt_var root_context = CosNaming::NamingContextExt::_narrow(obj.in());
  39
  40     // Find the EchoEventChannel.
  41     obj = root_context->resolve_str (ACE_TEXT_ALWAYS_CHAR (ecname));
  42
  43     // Downcast the object reference to an EventChannel reference.
  44     RtecEventChannelAdmin::EventChannel_var ec =
  45       RtecEventChannelAdmin::EventChannel::_narrow(obj.in());
  46     if (CORBA::is_nil(ec.in())) {
  47       std::cerr << "Could not narrow EchoEventChannel." << std::endl;
  48       return 1;
  49     }
  50     std::cout << "EchoEventConsumerMain.cpp: Found the EchoEventChannel." << std::endl;
  51
  52     // Obtain a reference to the consumer administration object.
  53     RtecEventChannelAdmin::ConsumerAdmin_var admin = ec->for_consumers();
  54
  55     // Obtain a reference to the push supplier proxy.
  56     RtecEventChannelAdmin::ProxyPushSupplier_var supplier =
  57       admin->obtain_push_supplier();
  58
  59     // Get the RootPOA.
  60     obj = orb->resolve_initial_references("RootPOA");
  61     PortableServer::POA_var poa = PortableServer::POA::_narrow(obj.in());
  62
  63     // Instantiate an EchoEventConsumer_i servant.
  64     PortableServer::Servant_var<EchoEventConsumer_i> servant =
  65       new EchoEventConsumer_i(orb.in(), supplier.in(), EVENT_LIMIT);
  66
  67     // Register it with the RootPOA.
  68     PortableServer::ObjectId_var oid = poa->activate_object(servant.in());
  69     CORBA::Object_var consumer_obj = poa->id_to_reference(oid.in());
  70     RtecEventComm::PushConsumer_var consumer =
  71       RtecEventComm::PushConsumer::_narrow(consumer_obj.in());
  72
  73     // Connect as a consumer.
  74     ACE_ConsumerQOS_Factory qos;
  75     qos.start_disjunction_group ();
  76     qos.insert (MY_SOURCE_ID,   // Source ID
  77                 MY_EVENT_TYPE,  // Event Type
  78                 0);             // handle to the rt_info
  79     supplier->connect_push_consumer (consumer.in (),
  80                                      qos.get_ConsumerQOS ());
  81
  82     // Activate the POA via its POAManager.
  83     PortableServer::POAManager_var poa_manager = poa->the_POAManager();
  84     poa_manager->activate();
  85
  86     std::cout << "EchoEventConsumerMain.cpp: Ready to receive events..." << std::endl;
  87
  88     // Enter the ORB event loop.
  89     orb->run();
  90
  91     // If we have reached this, we must be shutting down...
  92     // Disconnect the ProxyPushSupplier.
  93     orb->destroy();
  94
  95     return 0;
  96
  97   }
  98   catch(const CORBA::Exception& exc)
  99   {
 100     std::cerr << "Caught CORBA::Exception" << std::endl << exc << std::endl;
 101   }
 102
 103   return 1;
 104 }