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// -*- C++ -*-
// $Id$
#include "tao/Invocation_Adapter.h"
#include "tao/Profile_Transport_Resolver.h"
#include "tao/operation_details.h"
#include "tao/Stub.h"
#include "tao/ORB_Core.h"
#include "tao/Synch_Invocation.h"
#include "tao/debug.h"
#include "tao/Collocated_Invocation.h"
#include "tao/Transport.h"
#include "tao/Transport_Mux_Strategy.h"
#include "tao/GIOP_Utils.h"
#include "tao/TAOC.h"
#include "tao/SystemException.h"
#include "tao/Collocation_Resolver.h"
#include "ace/Service_Config.h"
#if !defined (__ACE_INLINE__)
# include "tao/Invocation_Adapter.inl"
#endif /* __ACE_INLINE__ */
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
namespace TAO
{
Invocation_Adapter::~Invocation_Adapter (void)
{
}
void
Invocation_Adapter::invoke (TAO::Exception_Data *ex_data,
unsigned long ex_count)
{
// Should stub object be refcounted here?
TAO_Stub *stub = this->get_stub ();
TAO_Operation_Details op_details (this->operation_,
this->op_len_,
this->args_,
this->number_args_,
ex_data,
ex_count);
this->invoke_i (stub, op_details);
}
void
Invocation_Adapter::invoke_i (TAO_Stub *stub, TAO_Operation_Details &details)
{
// The invocation has got to be within the context of the
// corresponding ORB's configuration. Otherwise things like
// timeout hooks, etc may not work as expected. Especially if
// there are multiple ORB instances in the process, each with its
// own, local configuration.
ACE_Service_Config_Guard scg (stub->orb_core ()->configuration ());
// Cache the target to a local variable.
CORBA::Object_var effective_target =
CORBA::Object::_duplicate (this->target_);
// Initial state
TAO::Invocation_Status status = TAO_INVOKE_START;
ACE_Time_Value *max_wait_time = 0;
ACE_Time_Value tmp_wait_time = ACE_Time_Value::zero;
if (this->get_timeout (stub, tmp_wait_time))
{
max_wait_time= &tmp_wait_time;
}
while (status == TAO_INVOKE_START || status == TAO_INVOKE_RESTART)
{
// Default we go to remote
Collocation_Strategy strat = TAO_CS_REMOTE_STRATEGY;
// If we have the opportunity for collocation we maybe
// can use a collocated invocation. Similarly, if the
// target object reference contains a pointer to a servant,
// the object reference also refers to a collocated object.
// get the ORBStrategy
strat = this->collocation_strategy (effective_target.in ());
if (TAO_debug_level > 2)
{
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT("TAO (%P|%t) - Invocation_Adapter::invoke_i, ")
ACE_TEXT("making a %C invocation\n"),
TAO::translate_collocation_strategy(strat)));
}
if (strat == TAO_CS_REMOTE_STRATEGY || strat == TAO_CS_LAST)
{
status =
this->invoke_remote_i (stub,
details,
effective_target,
max_wait_time);
}
else
{
if (strat == TAO_CS_THRU_POA_STRATEGY)
{
(void) this->set_response_flags (stub, details);
}
status =
this->invoke_collocated_i (stub,
details,
effective_target,
strat);
}
if (status == TAO_INVOKE_RESTART)
{
details.reset_request_service_info ();
details.reset_reply_service_info ();
if (TAO_debug_level > 2)
{
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT("TAO (%P|%t) - Invocation_Adapter::invoke_i, ")
ACE_TEXT("handling forwarded locations\n")));
}
}
}
}
bool
Invocation_Adapter::get_timeout (TAO_Stub *stub, ACE_Time_Value &timeout)
{
bool has_timeout = false;
this->target_->orb_core ()->call_timeout_hook (stub, has_timeout, timeout);
return has_timeout;
}
TAO_Stub *
Invocation_Adapter::get_stub (void) const
{
TAO_Stub * const stub = this->target_->_stubobj ();
if (stub == 0)
{
if (TAO_debug_level > 0)
{
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("Invocation_Adapter::get_stub, ")
ACE_TEXT ("raising CORBA::INTERNAL because of nil ")
ACE_TEXT ("stub.\n")));
}
throw ::CORBA::INTERNAL (
CORBA::SystemException::_tao_minor_code (
TAO::VMCID,
EINVAL),
CORBA::COMPLETED_NO);
}
return stub;
}
Invocation_Status
Invocation_Adapter::invoke_collocated_i (TAO_Stub *stub,
TAO_Operation_Details &details,
CORBA::Object_var &effective_target,
Collocation_Strategy strat)
{
// Initial state
TAO::Invocation_Status status = TAO_INVOKE_START;
Collocated_Invocation coll_inv (this->target_,
effective_target.in (),
stub,
details,
this->type_ == TAO_TWOWAY_INVOCATION);
status = coll_inv.invoke (strat);
if (status == TAO_INVOKE_RESTART &&
(coll_inv.reply_status () == GIOP::LOCATION_FORWARD ||
coll_inv.reply_status () == GIOP::LOCATION_FORWARD_PERM))
{
CORBA::Boolean const is_permanent_forward =
(coll_inv.reply_status () == GIOP::LOCATION_FORWARD_PERM);
effective_target = coll_inv.steal_forwarded_reference ();
this->object_forwarded (effective_target, stub, is_permanent_forward);
}
return status;
}
void
Invocation_Adapter::set_response_flags (
TAO_Stub *stub,
TAO_Operation_Details &details)
{
switch (this->type_)
{
case TAO_ONEWAY_INVOCATION:
{
// Grab the syncscope policy from the ORB.
Messaging::SyncScope sync_scope;
bool has_synchronization = false;
stub->orb_core ()->call_sync_scope_hook (stub,
has_synchronization,
sync_scope);
if (has_synchronization)
details.response_flags (CORBA::Octet (sync_scope));
else
details.response_flags (
CORBA::Octet (Messaging::SYNC_WITH_TRANSPORT));
break;
}
case TAO_TWOWAY_INVOCATION:
{
// @@note: Need to change this to something better. Too many
// hash defines meaning the same things.
details.response_flags (TAO_TWOWAY_RESPONSE_FLAG);
break;
}
}
}
Invocation_Status
Invocation_Adapter::invoke_remote_i (TAO_Stub *stub,
TAO_Operation_Details &details,
CORBA::Object_var &effective_target,
ACE_Time_Value *&max_wait_time)
{
(void) this->set_response_flags (stub, details);
CORBA::Octet const rflags = details.response_flags ();
bool const block_connect =
rflags != static_cast<CORBA::Octet> (Messaging::SYNC_NONE)
&& rflags != static_cast<CORBA::Octet> (TAO::SYNC_DELAYED_BUFFERING);
// Create the resolver which will pick (or create) for us a
// transport and a profile from the effective_target.
Profile_Transport_Resolver resolver (
effective_target.in (),
stub,
block_connect);
resolver.resolve (max_wait_time);
if (TAO_debug_level)
{
if (max_wait_time && *max_wait_time == ACE_Time_Value::zero)
ACE_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - Invocation_Adapter::invoke_remote_i, ")
ACE_TEXT ("max wait time consumed during transport resolution\n")));
}
// Update the request id now that we have a transport
if (resolver.transport ())
{
details.request_id (resolver.transport ()->tms ()->request_id ());
}
switch (this->type_)
{
case TAO_ONEWAY_INVOCATION:
{
return this->invoke_oneway (details,
effective_target,
resolver,
max_wait_time);
}
case TAO_TWOWAY_INVOCATION:
{
return this->invoke_twoway (details,
effective_target,
resolver,
max_wait_time);
}
}
return TAO_INVOKE_FAILURE;
}
Invocation_Status
Invocation_Adapter::invoke_twoway (TAO_Operation_Details &details,
CORBA::Object_var &effective_target,
Profile_Transport_Resolver &r,
ACE_Time_Value *&max_wait_time)
{
// Simple sanity check
if (this->mode_ != TAO_SYNCHRONOUS_INVOCATION ||
this->type_ != TAO_TWOWAY_INVOCATION)
{
throw ::CORBA::INTERNAL (
CORBA::SystemException::_tao_minor_code (
TAO::VMCID,
EINVAL),
CORBA::COMPLETED_NO);
}
TAO::Synch_Twoway_Invocation synch (this->target_, r, details);
Invocation_Status const status = synch.remote_twoway (max_wait_time);
if (status == TAO_INVOKE_RESTART &&
(synch.reply_status () == GIOP::LOCATION_FORWARD ||
synch.reply_status () == GIOP::LOCATION_FORWARD_PERM))
{
CORBA::Boolean const is_permanent_forward =
(synch.reply_status () == GIOP::LOCATION_FORWARD_PERM);
effective_target = synch.steal_forwarded_reference ();
this->object_forwarded (effective_target,
r.stub (),
is_permanent_forward);
}
return status;
}
Invocation_Status
Invocation_Adapter::invoke_oneway (TAO_Operation_Details &details,
CORBA::Object_var &effective_target,
Profile_Transport_Resolver &r,
ACE_Time_Value *&max_wait_time)
{
TAO::Synch_Oneway_Invocation synch (this->target_, r, details);
Invocation_Status const s = synch.remote_oneway (max_wait_time);
if (s == TAO_INVOKE_RESTART &&
(synch.reply_status () == GIOP::LOCATION_FORWARD ||
synch.reply_status () == GIOP::LOCATION_FORWARD_PERM))
{
CORBA::Boolean const is_permanent_forward =
(synch.reply_status () == GIOP::LOCATION_FORWARD_PERM);
effective_target = synch.steal_forwarded_reference ();
this->object_forwarded (effective_target,
r.stub (),
is_permanent_forward);
}
return s;
}
void
Invocation_Adapter::object_forwarded (CORBA::Object_var &effective_target,
TAO_Stub *stub,
CORBA::Boolean permanent_forward)
{
// The object pointer has to be changed to a TAO_Stub pointer
// in order to obtain the profiles.
TAO_Stub *stubobj = 0;
bool nil_forward_ref = false;
if (CORBA::is_nil (effective_target.in ()))
nil_forward_ref = true;
else
{
stubobj = effective_target->_stubobj ();
if (stubobj && stubobj->base_profiles ().size () == 0)
nil_forward_ref = true;
}
if (nil_forward_ref)
throw ::CORBA::TRANSIENT (
CORBA::SystemException::_tao_minor_code (
TAO_INVOCATION_LOCATION_FORWARD_MINOR_CODE,
errno),
CORBA::COMPLETED_NO);
if (stubobj == 0)
throw ::CORBA::INTERNAL (
CORBA::SystemException::_tao_minor_code (
TAO_INVOCATION_LOCATION_FORWARD_MINOR_CODE,
errno),
CORBA::COMPLETED_NO);
// Reset the profile in the stubs
stub->add_forward_profiles (stubobj->base_profiles (), permanent_forward);
if (stub->next_profile () == 0)
throw ::CORBA::TRANSIENT (
CORBA::SystemException::_tao_minor_code (
TAO_INVOCATION_LOCATION_FORWARD_MINOR_CODE,
errno),
CORBA::COMPLETED_NO);
}
TAO::Collocation_Strategy
Invocation_Adapter::collocation_strategy (CORBA::Object_ptr object)
{
TAO::Collocation_Strategy strategy = TAO::TAO_CS_REMOTE_STRATEGY;
TAO_Stub *stub = object->_stubobj ();
if (!CORBA::is_nil (stub->servant_orb_var ().in ()) &&
stub->servant_orb_var ()->orb_core () != 0)
{
TAO_ORB_Core *orb_core = stub->servant_orb_var ()->orb_core ();
if (orb_core->collocation_resolver ().is_collocated (object))
{
switch (orb_core->get_collocation_strategy ())
{
case TAO_ORB_Core::TAO_COLLOCATION_THRU_POA:
{
// check opportunity
if (ACE_BIT_ENABLED (this->collocation_opportunity_,
TAO::TAO_CO_THRU_POA_STRATEGY))
{
strategy = TAO::TAO_CS_THRU_POA_STRATEGY;
}
else
{
if (TAO_debug_level > 0)
{
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("Invocation_Adapter::collocation_strategy, ")
ACE_TEXT ("request for through poa collocation ")
ACE_TEXT ("without needed collocation opportunity.\n")));
}
// collocation object, but no collocation_opportunity for Thru_poa
throw ::CORBA::INTERNAL (
CORBA::SystemException::_tao_minor_code (
TAO::VMCID,
EINVAL),
CORBA::COMPLETED_NO);
}
break;
}
case TAO_ORB_Core::TAO_COLLOCATION_DIRECT:
{
if (ACE_BIT_ENABLED (this->collocation_opportunity_,
TAO::TAO_CO_DIRECT_STRATEGY)
&& (object->_servant () != 0))
{
strategy = TAO::TAO_CS_DIRECT_STRATEGY;
}
else
{
if (TAO_debug_level > 0)
{
ACE_ERROR ((LM_ERROR,
ACE_TEXT ("Invocation_Adapter::collocation_strategy, ")
ACE_TEXT ("request for direct collocation ")
ACE_TEXT ("without needed collocation opportunity.\n")));
}
// collocation object, but no collocation_opportunity for Direct
// or servant() == 0
throw ::CORBA::INTERNAL (
CORBA::SystemException::_tao_minor_code (
TAO::VMCID,
EINVAL),
CORBA::COMPLETED_NO);
}
break;
}
case TAO_ORB_Core::TAO_COLLOCATION_BEST:
{
if (ACE_BIT_ENABLED (this->collocation_opportunity_,
TAO::TAO_CO_DIRECT_STRATEGY)
&& (object->_servant () != 0))
{
strategy = TAO::TAO_CS_DIRECT_STRATEGY;
}
else if (ACE_BIT_ENABLED (this->collocation_opportunity_,
TAO::TAO_CO_THRU_POA_STRATEGY))
{
strategy = TAO::TAO_CS_THRU_POA_STRATEGY;
}
else
{
strategy = TAO::TAO_CS_REMOTE_STRATEGY;
}
break;
}
}
}
}
return strategy;
}
} // End namespace TAO
TAO_END_VERSIONED_NAMESPACE_DECL
|