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//$Id$
#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/Collocation_Proxy_Broker.h"
#if !defined (__ACE_INLINE__)
# include "tao/Invocation_Adapter.inl"
#endif /* __ACE_INLINE__ */
ACE_RCSID (tao,
Invocation_Adapter,
"$Id$")
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
ACE_ENV_ARG_DECL)
{
// Should stub object be refcounted here?
TAO_Stub *stub =
this->get_stub (ACE_ENV_SINGLE_ARG_PARAMETER);
ACE_CHECK;
TAO_Operation_Details op_details (this->operation_,
this->op_len_,
this->number_args_ != 0,
this->args_,
this->number_args_,
ex_data,
ex_count);
this->invoke_i (stub,
op_details
ACE_ENV_ARG_PARAMETER);
ACE_CHECK;
}
void
Invocation_Adapter::invoke_i (TAO_Stub *stub,
TAO_Operation_Details &details
ACE_ENV_ARG_DECL)
{
// 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;
while (status == TAO_INVOKE_START ||
status == TAO_INVOKE_RESTART)
{
// Default we go to remote
Collocation_Strategy strat = TAO_CS_REMOTE_STRATEGY;
// If we have a collocated proxy broker we look if 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.
if (cpb_ != 0 || effective_target->_servant () != 0)
{
strat =
TAO_ORB_Core::collocation_strategy (effective_target.in ()
ACE_ENV_ARG_PARAMETER);
ACE_CHECK;
}
if (strat == TAO_CS_REMOTE_STRATEGY ||
strat == TAO_CS_LAST)
{
status =
this->invoke_remote_i (stub,
details,
effective_target,
max_wait_time
ACE_ENV_ARG_PARAMETER);
ACE_CHECK;
}
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
ACE_ENV_ARG_PARAMETER);
ACE_CHECK;
}
if (status == TAO_INVOKE_RESTART)
{
details.reset_request_service_info ();
details.reset_reply_service_info ();
if (TAO_debug_level > 2)
{
ACE_DEBUG ((LM_DEBUG,
"TAO (%P|%t) - Invocation_Adapter::invoke_i, "
"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 (ACE_ENV_SINGLE_ARG_DECL) const
{
TAO_Stub * const stub =
this->target_->_stubobj ();
if (stub == 0)
ACE_THROW_RETURN (CORBA::INTERNAL (
CORBA::SystemException::_tao_minor_code (
TAO::VMCID,
EINVAL),
CORBA::COMPLETED_NO),
stub);
return stub;
}
Invocation_Status
Invocation_Adapter::invoke_collocated_i (TAO_Stub *stub,
TAO_Operation_Details &details,
CORBA::Object_var &effective_target,
Collocation_Strategy strat
ACE_ENV_ARG_DECL)
{
// To make a collocated call we must have a collocated proxy broker, the
// invoke_i() will make sure that we only come here when we have one
ACE_ASSERT (cpb_ != 0
|| (strat == TAO_CS_THRU_POA_STRATEGY
&& effective_target->_servant () != 0));
// 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 (this->cpb_,
strat
ACE_ENV_ARG_PARAMETER);
ACE_CHECK_RETURN (TAO_INVOKE_FAILURE);
if (status == TAO_INVOKE_RESTART &&
coll_inv.is_forwarded ())
{
effective_target =
coll_inv.steal_forwarded_reference ();
(void) this->object_forwarded (effective_target,
stub
ACE_ENV_ARG_PARAMETER);
ACE_CHECK_RETURN (TAO_INVOKE_FAILURE);
}
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;
}
}
return;
}
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
ACE_ENV_ARG_DECL)
{
ACE_Time_Value tmp_wait_time;
bool is_timeout =
this->get_timeout (stub,
tmp_wait_time);
if (is_timeout)
max_wait_time = &tmp_wait_time;
(void) this->set_response_flags (stub,
details);
// 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,
(details.response_flags () != Messaging::SYNC_NONE));
resolver.resolve (max_wait_time
ACE_ENV_ARG_PARAMETER);
ACE_CHECK_RETURN (TAO_INVOKE_FAILURE);
// Update the request id now that we have a transport
details.request_id (resolver.transport ()->tms ()->request_id ());
if (this->type_ == TAO_ONEWAY_INVOCATION)
{
return this->invoke_oneway (details,
effective_target,
resolver,
max_wait_time
ACE_ENV_ARG_PARAMETER);
}
else if (this->type_ == TAO_TWOWAY_INVOCATION)
{
return this->invoke_twoway (details,
effective_target,
resolver,
max_wait_time
ACE_ENV_ARG_PARAMETER);
}
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
ACE_ENV_ARG_DECL)
{
// Simple sanity check
if (this->mode_ != TAO_SYNCHRONOUS_INVOCATION ||
this->type_ != TAO_TWOWAY_INVOCATION)
{
ACE_THROW_RETURN (CORBA::INTERNAL (
CORBA::SystemException::_tao_minor_code (
TAO::VMCID,
EINVAL),
CORBA::COMPLETED_NO),
TAO_INVOKE_FAILURE);
}
TAO::Synch_Twoway_Invocation synch (this->target_,
r,
details);
Invocation_Status status =
synch.remote_twoway (max_wait_time
ACE_ENV_ARG_PARAMETER);
ACE_CHECK_RETURN (TAO_INVOKE_FAILURE);
if (status == TAO_INVOKE_RESTART &&
synch.is_forwarded ())
{
effective_target =
synch.steal_forwarded_reference ();
this->object_forwarded (effective_target,
r.stub ()
ACE_ENV_ARG_PARAMETER);
ACE_CHECK_RETURN (TAO_INVOKE_FAILURE);
}
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
ACE_ENV_ARG_DECL)
{
TAO::Synch_Oneway_Invocation synch (this->target_,
r,
details);
Invocation_Status s =
synch.remote_oneway (max_wait_time
ACE_ENV_ARG_PARAMETER);
ACE_CHECK_RETURN (TAO_INVOKE_FAILURE);
if (s == TAO_INVOKE_RESTART &&
synch.is_forwarded ())
{
effective_target =
synch.steal_forwarded_reference ();
this->object_forwarded (effective_target,
r.stub ()
ACE_ENV_ARG_PARAMETER);
ACE_CHECK_RETURN (TAO_INVOKE_FAILURE);
}
return s;
}
void
Invocation_Adapter::object_forwarded (CORBA::Object_var &effective_target,
TAO_Stub *stub
ACE_ENV_ARG_DECL)
{
// The object pointer has to be changed to a TAO_Stub pointer
// in order to obtain the profiles.
TAO_Stub *stubobj =
effective_target->_stubobj ();
if (stubobj == 0)
ACE_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 ());
if (stub->next_profile () == 0)
ACE_THROW (CORBA::TRANSIENT (
CORBA::SystemException::_tao_minor_code (
TAO_INVOCATION_LOCATION_FORWARD_MINOR_CODE,
errno),
CORBA::COMPLETED_NO));
return;
}
} // End namespace TAO
TAO_END_VERSIONED_NAMESPACE_DECL
|
