path: root/TAO/tests/POA/Forwarding/server.cpp

// $Id$

// ===========================================================================================
// = LIBRARY
//    TAO/tests/POA/Forwarding
//
// = FILENAME
//    server.cpp
//
// = DESCRIPTION
//
// = AUTHOR
//    Irfan Pyarali
// ===========================================================================================

#include "tao/corba.h"
#include "ace/Read_Buffer.h"
#include "MyFooServant.h"

static char *first_foo_forward_to_IOR_ = 0;
static char *second_foo_forward_to_IOR_ = 0;
FILE* first_foo_ior_output_file_;
FILE* second_foo_ior_output_file_;


int
read_ior (char *filename, const unsigned int foo_number)
{
  // Open the file for reading.
  ACE_HANDLE f_handle_ = ACE_OS::open (filename,0);
  
  if (f_handle_ == ACE_INVALID_HANDLE)
    ACE_ERROR_RETURN ((LM_ERROR,
    "Unable to open %s for writing: %p\n",
		       filename),
		      -1);
  ACE_Read_Buffer ior_buffer (f_handle_);
  if (foo_number == 1)
    {
      first_foo_forward_to_IOR_ = ior_buffer.read ();
      if (first_foo_forward_to_IOR_ == 0)
	ACE_ERROR_RETURN ((LM_ERROR,
                         "Unable to allocate memory to read ior: %p\n"),
			  -1);  
    }
  else if (foo_number == 2)
    {
      second_foo_forward_to_IOR_ = ior_buffer.read ();
      if (second_foo_forward_to_IOR_ == 0)
	ACE_ERROR_RETURN ((LM_ERROR,
			   "Unable to allocate memory to read ior: %p\n"),
			  -1);
    }
  
  ACE_DEBUG ((LM_DEBUG, "read ior from the file\n"));  
  return 0;
}




static int
parse_args (int argc, char **argv)
{
  ACE_Get_Opt get_opts (argc, argv, "f:g:k:l:o:O:p:");
  int c;
  int result; 
  
  while ((c = get_opts ()) != -1)
    switch (c)
      {
      case 'f': // read the IOR from the file.
        result = read_ior (get_opts.optarg,1);
        if (result < 0)
          ACE_ERROR_RETURN ((LM_ERROR,
			     "Unable to read ior from %s : %p\n",
			     get_opts.optarg),
			    -1);
        break;
      case 'g': // read the IOR from the file.
        result = read_ior (get_opts.optarg,2);
        if (result < 0)
          ACE_ERROR_RETURN ((LM_ERROR,
			     "Unable to read ior from %s : %p\n",
			     get_opts.optarg),
			    -1);
        break;
      case 'k':
        first_foo_forward_to_IOR_ = get_opts.optarg;
        break;
      case 'l':
        second_foo_forward_to_IOR_ = get_opts.optarg;
        break;
      case 'o': // output the IOR to a file.
        first_foo_ior_output_file_ = ACE_OS::fopen (get_opts.optarg, "w");
        if (first_foo_ior_output_file_ == 0)
          ACE_ERROR_RETURN ((LM_ERROR,
                             "Unable to open %s for writing: %p\n",
                             get_opts.optarg), -1);
        break; 
      case 'p': // output the IOR to a file.
        second_foo_ior_output_file_ = ACE_OS::fopen (get_opts.optarg, "w");
        if (second_foo_ior_output_file_ == 0)
          ACE_ERROR_RETURN ((LM_ERROR,
                             "Unable to open %s for writing: %p\n",
                             get_opts.optarg), -1);
        break; 
      case 'O': 
        break;
      case '?':  
      default:
        ACE_ERROR_RETURN ((LM_ERROR,
                           "\nusage:  %s \n"
                           "-f forward_to_IOR_file (first foo)\n"
                           "-g forward_to_IOR_file (second foo)\n"
                           "-k forward_to_IOR (first foo)\n"
                           "-l forward_to_IOR (second foo)\n"
                           "-o file_for_IOR (first foo)\n"
                           "-p file_for_IOR (second foo)\n"
                           "\n",
                           argv [0]),
			  -1);
      }
  
  // Indicates successful parsing of command line.
  return 0;
}


void 
get_forward_reference (char *IOR,
                       CORBA::Object_var &forward_location_var,
                       CORBA::ORB_var &orb,
                       CORBA::Environment &env)
{
  if (IOR != 0)
    {
      forward_location_var = orb->string_to_object (IOR, env);
      
      ACE_DEBUG ((LM_DEBUG,
                  "\nFound IOR is:<%s>\n",
                  IOR));
      
      if (env.exception () != 0)
        {
          env.print_exception ("ORB::string_to_object");
          return;
        }
      
      if (CORBA::is_nil(forward_location_var.in()))      
        ACE_DEBUG ((LM_DEBUG,"Forward_to location is wrong\n"));
    }
}

int
main (int argc, char **argv)
{
  int result = parse_args (argc, argv);
  if (result == -1)
    return -1;

  CORBA::Environment env;
  
  // Initialize the ORB first.
  CORBA::ORB_var orb = CORBA::ORB_init (argc, argv, 0, env);
  
  if (env.exception () != 0)
    {
      env.print_exception ("CORBA::ORB_init");
      return -1;
    }

  // Obtain the RootPOA.
  CORBA::Object_var obj = orb->resolve_initial_references ("RootPOA");
  
  // Get the POA_var object from Object_var.
  PortableServer::POA_var root_poa =
    PortableServer::POA::_narrow (obj.in (), env);
  
  if (env.exception () != 0)
    {
      env.print_exception ("PortableServer::POA::_narrow");
      return -1;
    }
  
  // Get the POAManager of the RootPOA.
  PortableServer::POAManager_var poa_manager =
    root_poa->the_POAManager (env);
  
  if (env.exception () != 0)
    {
      env.print_exception ("PortableServer::POA::the_POAManager");
      return -1;
    }
  
  // Policies for the childPOA to be created.
  CORBA::PolicyList policies (4); 
  policies.length (4);

  // The next two policies are common to both
  
  // Id Assignment Policy
  policies[0] =
    root_poa->create_id_assignment_policy (PortableServer::USER_ID, env);
  if (env.exception () != 0)
    {
      env.print_exception ("PortableServer::POA::create_id_assignment_policy");
      return -1;
    }
  
  // Lifespan policy
  policies[1] = 
    root_poa->create_lifespan_policy (PortableServer::PERSISTENT, env);
  if (env.exception () != 0)
    {
      env.print_exception ("PortableServer::POA::create_lifespan_policy");
      return -1;
    }
  
  
  // Documentation !!!!
  // first_POA will contain an object which will use the POA
  // directly to do forwarding
  
  // second_POA will contain an object which will use the 
  // Servant_Locator to do forwarding
  
  PortableServer::POA_var first_poa;
  {
    // Use only the two already define policies
    policies.length (2);
    
    ACE_CString name = "firstPOA";
    
    // Create firstPOA as the child of RootPOA with the above policies
    // firstPOA will use SERVANT_ACTIVATOR because of RETAIN policy.
    first_poa = root_poa->create_POA (name.c_str (),
                                      poa_manager.in (),
                                      policies,
                                      env);
    if (env.exception () != 0)
      {
        env.print_exception ("PortableServer::POA::create_POA");
        return -1;
      }
  }
  
  PortableServer::POA_var second_poa;
  {
    // use all the four policies
    policies.length (4);
    
    // Tell the POA to use a servant manager
    policies[2] =
      root_poa->create_request_processing_policy (PortableServer::USE_SERVANT_MANAGER, env);
    if (env.exception () != 0)
      {
	env.print_exception ("PortableServer::POA::create_request_processing_policy");
	return -1;
      }
    
    // Servant Retention Policy -> Use a locator
    policies[3] =
      root_poa->create_servant_retention_policy (PortableServer::NON_RETAIN, env);
    if (env.exception () != 0)
      {
	env.print_exception ("PortableServer::POA::create_servant_retention_policy");
	return -1; 
      }
    
    
    ACE_CString name = "secondPOA";
    
    // Create secondPOA as child of RootPOA with the above policies
    // secondPOA will use a SERVANT_LOCATOR because of NON_RETAIN
    // policy.
    second_poa = root_poa->create_POA (name.c_str (),
				       poa_manager.in (),
				       policies,
				       env);
    if (env.exception () != 0)
      {
        env.print_exception ("PortableServer::POA::create_POA");
        return -1;
      }
  }
  
  
  // Creation of childPOAs is over. Destroy the Policy objects.
  for (CORBA::ULong i = 0;
       i < policies.length () && env.exception () == 0;
       ++i)
    {
      CORBA::Policy_ptr policy = policies[i];
      policy->destroy (env);
    }
  if (env.exception () != 0)
    {
      env.print_exception ("PortableServer::POA::create_POA");
      return -1;
    }
  
  
  // Get the forward_to reference to feed it into 
  // object implementations
  CORBA::Object_var first_foo_forward_to;
  get_forward_reference (first_foo_forward_to_IOR_,
                         first_foo_forward_to,
                         orb,
                         env);
  
  CORBA::Object_var second_foo_forward_to;
  get_forward_reference (second_foo_forward_to_IOR_,
                         second_foo_forward_to,
                         orb,
                         env);
    
  // the forward_to reference is now available
  
  // Create the first MyFooServant
  //            =====

  MyFirstFooServant first_foo_impl (first_poa.in (), 
                                    27,
                                    first_foo_forward_to.in ());

  // Create ObjectId and use that ObjectId to activate the first_foo_impl
  // object.
  //
  // Operation Used :
  //  void activate_object_with_id( in ObjectId oid, in Servant p_servant)
  //       raises (ObjectAlreadyActive, ServantAlreadyActive, WrongPolicy);
  PortableServer::ObjectId_var first_foo_oid =
    PortableServer::string_to_ObjectId ("firstFoo");

  first_poa->activate_object_with_id (first_foo_oid.in (),
                                      &first_foo_impl,
                                      env);
  if (env.exception () != 0)
    {
      env.print_exception ("PortableServer::POA::activate_object_with_id");
      return -1;
    }
  
  // Get Object reference for first_foo_impl object.
  Foo_var first_foo = first_foo_impl._this (env);
  if (env.exception () != 0)
    {
      env.print_exception ("POA_Foo::_this");
      return -1;
    }
  
  // Stringyfy the object reference and print it out.
  CORBA::String_var first_foo_ior =
    orb->object_to_string (first_foo.in (), env);
  
  if (env.exception () != 0)
    {
      env.print_exception ("CORBA::ORB::object_to_string");
      return -1;
    }
  
  ACE_DEBUG ((LM_DEBUG,
              "The first foo IOR is: <%s>\n",
              first_foo_ior.in ()));
  
  if (first_foo_ior_output_file_)
    {
      ACE_OS::fprintf (first_foo_ior_output_file_,
                       "%s",
                       first_foo_ior.in ());
      ACE_OS::fclose (first_foo_ior_output_file_);
      
      ACE_DEBUG ((LM_DEBUG, "wrote ior of the first foo to the file\n"));
    }
  
  
  // instantiate the servant locator and set it for 
  // the second child POA
  // The locator gets to know where to forward to
  
  MyFooServantLocator servant_locator_impl (second_foo_forward_to.in());
  PortableServer::ServantLocator_var servant_locator =
    servant_locator_impl._this (env);
  
  if (env.exception () != 0)
    {
      env.print_exception ("PortableServer::POAManager::_this");
      return -1;
    }
  
  // Set MyFooServantLocator object as the servant Manager of
  // secondPOA.

  second_poa->set_servant_manager (servant_locator.in (), env);
  
  if (env.exception () != 0)
    {
      env.print_exception ("PortableServer::POAManager::set_servant_manager");
      return -1;
    }

  
  
  // Create the second MyFooServant
  //            ======
  
  // Try to create a reference with user created ID in second_poa
  // which uses MyFooServantLocator.
  
  PortableServer::ObjectId_var second_foo_oid =
    PortableServer::string_to_ObjectId ("secondFoo");
  
  CORBA::Object_var second_foo =
    second_poa->create_reference_with_id (second_foo_oid.in (),
                                          "IDL:Foo:1.0", env);

  if (env.exception () != 0)
    {
      env.print_exception ("PortableServer::POA::create_reference_with_id");
      return -1;
    }
  
  // Invoke object_to_string on the references created in firstPOA and
  // secondPOA.
  

  CORBA::String_var second_foo_ior = 
    orb->object_to_string (second_foo.in (), env);
  
  if (env.exception () != 0)
    {
      env.print_exception ("CORBA::ORB::object_to_string");
      return -1;
    }
  

  ACE_DEBUG ((LM_DEBUG,
              "The second foo IOR is: <%s>\n",
              second_foo_ior.in ()));
  
  
  if (second_foo_ior_output_file_)
    {
      ACE_OS::fprintf (second_foo_ior_output_file_,
                       "%s",
                       second_foo_ior.in ());
      ACE_OS::fclose (second_foo_ior_output_file_);

      ACE_DEBUG ((LM_DEBUG, "wrote ior of the second foo to the file\n"));
    }
  
  // end of the activation of the second foo object
  
  poa_manager->activate (env);
  if (env.exception () != 0)
    {
      env.print_exception ("PortableServer::POAManager::activate");
      return -1;
    }
  
  if (orb->run () == -1)
    ACE_ERROR_RETURN ((LM_ERROR, "%p\n", "CORBA::ORB::run"), -1);
  
  // Destroy RootPOA. (Also destroys childPOA)
  root_poa->destroy (CORBA::B_TRUE,
                     CORBA::B_TRUE,
                     env);
  if (env.exception () != 0)
    {
      env.print_exception ("PortableServer::POA::destroy");
      return -1;
    }
  
  return 0;
}