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// $Id$
#include "Consumer.h"
#include "orbsvcs/orbsvcs/RtecEventChannelAdminC.h"
#include "orbsvcs/orbsvcs/Event_Service_Constants.h"
#include "orbsvcs/orbsvcs/CosNamingC.h"
ACE_RCSID (EC_Examples,
Consumer,
"$Id$")
int
main (int argc, char* argv[])
{
Consumer consumer;
return consumer.run (argc, argv);
}
// ****************************************************************
Consumer::Consumer (void)
: event_count_ (0)
{
}
int
Consumer::run (int argc, char* argv[])
{
ACE_DECLARE_NEW_CORBA_ENV;
ACE_TRY
{
// ORB initialization boiler plate...
CORBA::ORB_var orb =
CORBA::ORB_init (argc, argv, "" ACE_ENV_ARG_PARAMETER);
ACE_TRY_CHECK;
// Do *NOT* make a copy because we don't want the ORB to outlive
// the run() method.
this->orb_ = orb.in ();
CORBA::Object_var object =
orb->resolve_initial_references ("RootPOA" ACE_ENV_ARG_PARAMETER);
ACE_TRY_CHECK;
PortableServer::POA_var poa =
PortableServer::POA::_narrow (object.in () ACE_ENV_ARG_PARAMETER);
ACE_TRY_CHECK;
PortableServer::POAManager_var poa_manager =
poa->the_POAManager (ACE_ENV_SINGLE_ARG_PARAMETER);
ACE_TRY_CHECK;
poa_manager->activate (ACE_ENV_SINGLE_ARG_PARAMETER);
ACE_TRY_CHECK;
// Obtain the event channel from the naming service
CORBA::Object_var naming_obj =
orb->resolve_initial_references ("NameService" ACE_ENV_ARG_PARAMETER);
ACE_TRY_CHECK;
if (CORBA::is_nil (naming_obj.in ()))
ACE_ERROR_RETURN ((LM_ERROR,
" (%P|%t) Unable to get the Naming Service.\n"),
1);
CosNaming::NamingContext_var naming_context =
CosNaming::NamingContext::_narrow (naming_obj.in () ACE_ENV_ARG_PARAMETER);
ACE_TRY_CHECK;
CosNaming::Name name (1);
name.length (1);
name[0].id = CORBA::string_dup ("EventService");
CORBA::Object_var ec_obj =
naming_context->resolve (name ACE_ENV_ARG_PARAMETER);
ACE_TRY_CHECK;
RtecEventChannelAdmin::EventChannel_var event_channel =
RtecEventChannelAdmin::EventChannel::_narrow (ec_obj.in ()
ACE_ENV_ARG_PARAMETER);
ACE_TRY_CHECK;
// The canonical protocol to connect to the EC
RtecEventChannelAdmin::ConsumerAdmin_var consumer_admin =
event_channel->for_consumers (ACE_ENV_SINGLE_ARG_PARAMETER);
ACE_TRY_CHECK;
RtecEventChannelAdmin::ProxyPushSupplier_var supplier =
consumer_admin->obtain_push_supplier (ACE_ENV_SINGLE_ARG_PARAMETER);
ACE_TRY_CHECK;
RtecEventComm::PushConsumer_var consumer =
this->_this (ACE_ENV_SINGLE_ARG_PARAMETER);
ACE_TRY_CHECK;
// Simple subscription, but usually the helper classes in
// $TAO_ROOT/orbsvcs/Event_Utils.h are a better way to do this.
RtecEventChannelAdmin::ConsumerQOS qos;
qos.dependencies.length (2);
RtecEventComm::EventHeader& h0 =
qos.dependencies[0].event.header;
h0.type = ACE_ES_DISJUNCTION_DESIGNATOR;
h0.source = ACE_ES_EVENT_SOURCE_ANY;
RtecEventComm::EventHeader& h1 =
qos.dependencies[1].event.header;
h1.type = ACE_ES_EVENT_UNDEFINED; // first free event type
h1.source = ACE_ES_EVENT_SOURCE_ANY;
supplier->connect_push_consumer (consumer.in (), qos
ACE_ENV_ARG_PARAMETER);
ACE_TRY_CHECK;
// Wait for events, using work_pending()/perform_work() may help
// or using another thread, this example is too simple for that.
orb->run ();
// We don't do any cleanup, it is hard to do it after shutdown,
// and would complicate the example; plus it is almost
// impossible to do cleanup after ORB->run() because the POA is
// in the holding state. Applications should use
// work_pending()/perform_work() to do more interesting stuff.
// Check the supplier for the proper way to do cleanup.
}
ACE_CATCHANY
{
ACE_PRINT_EXCEPTION (ACE_ANY_EXCEPTION, "Consumer::run");
return 1;
}
ACE_ENDTRY;
return 0;
}
void
Consumer::push (const RtecEventComm::EventSet& events
ACE_ENV_ARG_DECL_NOT_USED)
ACE_THROW_SPEC ((CORBA::SystemException))
{
if (events.length () == 0)
{
ACE_DEBUG ((LM_DEBUG,
"Consumer (%P|%t) no events\n"));
return;
}
this->event_count_ += events.length ();
if (this->event_count_ % 100 == 0)
{
ACE_DEBUG ((LM_DEBUG,
"Consumer (%P|%t): %d events received\n",
this->event_count_));
}
}
void
Consumer::disconnect_push_consumer (ACE_ENV_SINGLE_ARG_DECL)
ACE_THROW_SPEC ((CORBA::SystemException))
{
// In this example we shutdown the ORB when we disconnect from the
// EC (or rather the EC disconnects from us), but this doesn't have
// to be the case....
this->orb_->shutdown (0 ACE_ENV_ARG_PARAMETER);
}
// ****************************************************************
#if defined (ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION)
#elif defined(ACE_HAS_TEMPLATE_INSTANTIATION_PRAGMA)
#endif /* ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION */
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