1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
//=============================================================================
/**
* @file Forwarder.cpp
*
* $Id$
*
* @brief Definition of ImR_Forwarder
*
* @author Darrell Brunsch <brunsch@cs.wustl.edu>
* @author Priyanka Gontla <pgontla@doc.ece.uci.edu>
*/
//=============================================================================
#include "Forwarder.h"
#include "ImR_Locator_i.h"
#include "tao/ORB.h"
#include "tao/Object_KeyC.h"
#include "tao/ORB_Constants.h"
#include "tao/PortableServer/PortableServer.h"
#include "tao/PortableServer/POA_Current_Impl.h"
#include "tao/PortableServer/POA_Current.h"
/**
* This constructor takes in orb and ImR_Locator_i pointers to store for later
* use. It also grabs a reference to the POACurrent object for use in
* preinvoke.
*/
ImR_Forwarder::ImR_Forwarder (ImR_Locator_i& imr_impl)
: locator_ (imr_impl)
{
}
void
ImR_Forwarder::init (CORBA::ORB_ptr orb)
{
ACE_ASSERT (! CORBA::is_nil(orb));
this->orb_ = orb;
try
{
CORBA::Object_var tmp =
orb->resolve_initial_references ("POACurrent");
this->poa_current_var_ =
PortableServer::Current::_narrow (tmp.in ());
}
catch (const CORBA::Exception&)
{
ACE_DEBUG ((LM_DEBUG, "ImR_Forwarder::init() Exception ignored.\n"));
}
ACE_ASSERT (!CORBA::is_nil (this->poa_current_var_.in ()));
}
/**
* We figure out the intended recipient from the POA name. After activating
* the server, we throw a forwarding exception to the correct server.
*
* The big complicated thing here is that we have to create the forwarding
* ior based on what we already have. So we combine the endpoint received
* from activate_server_i and append the objectid from the request to it.
*/
PortableServer::Servant
ImR_Forwarder::preinvoke (const PortableServer::ObjectId &,
PortableServer::POA_ptr poa,
const char *,
PortableServer::ServantLocator::Cookie &)
{
ACE_ASSERT (! CORBA::is_nil(poa));
CORBA::Object_var forward_obj;
try
{
CORBA::String_var server_name = poa->the_name();
if (locator_.debug() > 1)
ACE_DEBUG ((LM_DEBUG, "ImR: Activating server <%s>.\n", server_name.in()));
// The activator stores a partial ior with each server. We can
// just tack on the current ObjectKey to get a valid ior for
// the desired server.
CORBA::String_var pior = locator_.activate_server_by_name (server_name.in (), false);
ACE_CString ior = pior.in ();
// Check that the returned ior is the expected partial ior with
// missing ObjectKey.
if (ior.find ("corbaloc:") != 0 || ior[ior.length () - 1] != '/')
{
ACE_ERROR ((LM_ERROR, "ImR_Forwarder::preinvoke () Invalid corbaloc ior.\n\t<%s>\n", ior.c_str()));
throw CORBA::OBJECT_NOT_EXIST (
CORBA::SystemException::_tao_minor_code (
TAO_IMPLREPO_MINOR_CODE,
0),
CORBA::COMPLETED_NO);
}
CORBA::String_var key_str;
// Unlike POA Current, this implementation cannot be cached.
TAO::Portable_Server::POA_Current* tao_current =
dynamic_cast <TAO::Portable_Server::POA_Current*> (this->poa_current_var_.in ());
ACE_ASSERT(tao_current != 0);
TAO::Portable_Server::POA_Current_Impl* impl = tao_current->implementation ();
TAO::ObjectKey::encode_sequence_to_string (key_str.out (), impl->object_key ());
ior += key_str.in();
if (locator_.debug() > 0)
ACE_DEBUG ((LM_DEBUG, "ImR: Forwarding invocation on <%s> to <%s>\n", server_name.in(), ior.c_str()));
forward_obj =
this->orb_->string_to_object (ior.c_str ());
}
catch (const ImplementationRepository::CannotActivate&)
{
throw CORBA::TRANSIENT (
CORBA::SystemException::_tao_minor_code (
TAO_IMPLREPO_MINOR_CODE,
0),
CORBA::COMPLETED_NO);
}
catch (const ImplementationRepository::NotFound&)
{
throw CORBA::TRANSIENT (
CORBA::SystemException::_tao_minor_code (
TAO_IMPLREPO_MINOR_CODE,
0),
CORBA::COMPLETED_NO);
}
catch (const CORBA::Exception& ex)
{
ex._tao_print_exception ("Forwarder");
throw CORBA::TRANSIENT (
CORBA::SystemException::_tao_minor_code (
TAO_IMPLREPO_MINOR_CODE,
0),
CORBA::COMPLETED_NO);
}
if (!CORBA::is_nil (forward_obj.in ()))
throw PortableServer::ForwardRequest (forward_obj.in ());
ACE_ERROR ((LM_ERROR, "Error: Forward_to reference is nil.\n"));
throw CORBA::OBJECT_NOT_EXIST (
CORBA::SystemException::_tao_minor_code (
TAO_IMPLREPO_MINOR_CODE,
0),
CORBA::COMPLETED_NO);
}
void
ImR_Forwarder::postinvoke (const PortableServer::ObjectId &,
PortableServer::POA_ptr,
const char *,
PortableServer::ServantLocator::Cookie,
PortableServer::Servant)
{
}
|
