CODEWITHSUNDEEP
c++corba
Daniele Pallastrelli
Daniele Pallastrelli

Reputation: 2552

MICO CORBA server with corbaloc access

I'm using MICO to create a C++ CORBA server.

In my system a client should be able to directly access the corba object in the server using a corbaloc address (no name service). Do you know if MICO provides such feature? How can I implement that? I tried with:

ORB_ptr orb = CORBA::ORB_init (argc, argv, "mico-local-orb");
Object_var obj = orb -> resolve_initial_references( "RootPOA" );
PortableServer::POA_var poa = PortableServer::POA::_narrow( obj );
PortableServer::POAManager_var pman = poa -> the_POAManager();
pman -> activate();

PortableServer::ObjectId_var oid = PortableServer::string_to_ObjectId( "hello" );

HelloImpl* servant = new HelloImpl();

poa -> activate_object_with_id( oid.in(), servant );
servant -> _remove_ref();

orb -> run();

this code works with OMNIORB but not with MICO.

EDIT: I also tried with a persistent lifespan policy but it doesn't work either:

ORB_ptr orb = ORB_init( argc, argv );
Object_var obj = orb -> resolve_initial_references( "RootPOA" );
PortableServer::POA_var poa = PortableServer::POA::_narrow( obj );
PortableServer::POAManager_var pman = poa -> the_POAManager();
pman -> activate();

PortableServer::LifespanPolicy_var lifespan = 
    poa -> create_lifespan_policy( PortableServer::PERSISTENT );
PortableServer::IdAssignmentPolicy_var idassignment = 
    poa ->  create_id_assignment_policy ( PortableServer::USER_ID );
CORBA::PolicyList policies( 2 );
policies.length( 2 );
policies[0] = PortableServer::IdAssignmentPolicy::_duplicate( idassignment );
policies[1] = PortableServer::LifespanPolicy::_duplicate( lifespan );
PortableServer::POA_var child_poa = 
    poa -> create_POA( "childPOA", pman.in(), policies );
PortableServer::POAManager_var child_pman = child_poa -> the_POAManager();
child_pman -> activate();

idassignment -> destroy();
lifespan -> destroy();

HelloImpl* servant = new HelloImpl();

PortableServer::ObjectId_var oid = child_poa -> activate_object( servant );
CORBA::Object_var ref = child_poa -> id_to_reference( oid.in() );
PortableServer::ObjectId_var oid = PortableServer::string_to_ObjectId( "hello" );
child_poa -> activate_object_with_id ( oid.in (), servant );

orb -> run();

EDIT2: I tested the server with a client that tries to string_to_object the following corbaloc addresses:

but none of them worked. I always get a CORBA::OBJECT_NOT_EXIST exception.

Thanks

Upvotes: 2

Views: 506

Answers (1)

tuergeist
tuergeist

Reputation: 9391

For Mico you have to use the poa hierarchy in the corbalo url as well. For your example corbaloc::localhost:12345/childPOA/hello should work.

See also the Diploma thesis of Frank Pilhofer, the implementor of Mico's POA, which states 

 create a persistent POA with the name ``MyPOA'', and then activate an object 
 using the ``MyObject'' Object Id, you could refer to that object using the IOR

  iioploc://thishost:1234/MyService/MyPOA/MyObject

Edit: You have to start your serving executable with a service name -POAImplName MyService

Upvotes: 1

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