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// $Id$
#include "AMI_Primary_Replication_Strategy.h"
#include "ace/Synch_T.h"
#include "GroupInfoPublisher.h"
#include "../Utils/ScopeGuard.h"
#include "Request_Context_Repository.h"
#include "../Utils/resolve_init.h"
#include "create_persistent_poa.h"
#include "Update_Manager.h"
#include "tao/Utils/PolicyList_Destroyer.h"
ACE_RCSID (EventChannel,
AMI_Primary_Replication_Strategy,
"$Id$")
AMI_Primary_Replication_Strategy::AMI_Primary_Replication_Strategy()
: handler_(this)
{
}
AMI_Primary_Replication_Strategy::~AMI_Primary_Replication_Strategy()
{
running_= false;
this->wait();
}
int AMI_Primary_Replication_Strategy::acquire_read (void)
{
return mutex_.acquire_read();
}
int AMI_Primary_Replication_Strategy::acquire_write (void)
{
return mutex_.acquire_write();
}
int AMI_Primary_Replication_Strategy::release (void)
{
return mutex_.release();
}
int AMI_Primary_Replication_Strategy::init(ACE_ENV_SINGLE_ARG_DECL)
{
return this->activate(ACE_ENV_SINGLE_ARG_PARAMETER);
}
int AMI_Primary_Replication_Strategy::svc()
{
ACE_TRY_NEW_ENV {
int argc = 0;
char** argv = 0;
orb_ = CORBA::ORB_init (argc, argv ACE_ENV_ARG_PARAMETER);
ACE_TRY_CHECK;
PortableServer::POA_var
root_poa = resolve_init<PortableServer::POA>(orb_.in(), "RootPOA"
ACE_ENV_ARG_PARAMETER);
ACE_TRY_CHECK;
// create POAManager
mgr_ = root_poa->the_POAManager(ACE_ENV_SINGLE_ARG_PARAMETER);
ACE_TRY_CHECK;
mgr_->activate(ACE_ENV_SINGLE_ARG_PARAMETER);
ACE_TRY_CHECK;
PortableServer::IdUniquenessPolicy_var id_uniqueness_policy =
root_poa->create_id_uniqueness_policy(PortableServer::MULTIPLE_ID
ACE_ENV_ARG_PARAMETER);
ACE_TRY_CHECK
TAO::Utils::PolicyList_Destroyer policy_list(3);
policy_list.length(1);
policy_list[0] = PortableServer::IdUniquenessPolicy::_duplicate(
id_uniqueness_policy.in()
);
poa_ = create_persistent_poa(root_poa, mgr_, "AMI_Update", policy_list
ACE_ENV_ARG_PARAMETER);
ACE_TRY_CHECK;
id_uniqueness_policy->destroy();
running_ = true;
while (running_) {
if (orb_->work_pending())
orb_->perform_work();
}
orb_->destroy();
}
ACE_CATCHANY {
ACE_PRINT_EXCEPTION(ex, "AMI_Primary_Replication_Strategy::svc");
running_ = false;
return -1;
}
ACE_ENDTRY;
running_ = false;
return 0;
}
void
AMI_Primary_Replication_Strategy::replicate_request(
const FTRT::State& state,
RollbackOperation rollback,
const FtRtecEventChannelAdmin::ObjectId& oid
ACE_ENV_ARG_DECL)
{
ACE_Auto_Event event;
Update_Manager* manager;
bool success;
FTRT::TransactionDepth transaction_depth =
Request_Context_Repository().get_transaction_depth();
const FtRtecEventChannelAdmin::EventChannelList& backups =
GroupInfoPublisher::instance()->backups();
size_t num_backups = backups.length();
if ((size_t)transaction_depth > num_backups)
ACE_THROW(FTRT::TransactionDepthTooHigh());
ACE_NEW_THROW_EX(manager,
Update_Manager(event, backups.length(), transaction_depth-1, success),
CORBA::NO_MEMORY());
Request_Context_Repository().set_transaction_depth(0);
for (size_t i = 0; i < num_backups; ++i) {
ACE_TRY_NEW_ENV {
PortableServer::ObjectId oid;
FTRT::AMI_UpdateableHandler_ptr handler = handler_.activate(manager, i, oid
ACE_ENV_ARG_PARAMETER);
ScopeGuard guard = MakeObjGuard(*poa_.in(),
&PortableServer::POA::deactivate_object,
oid)
ACE_TRY_CHECK;
FtRtecEventChannelAdmin::EventChannel_ptr obj = backups[i];
// send set_update request to all the backup replicas
obj->sendc_set_update(handler, state
ACE_ENV_ARG_PARAMETER);
ACE_TRY_CHECK;
guard.Dismiss();
}
ACE_CATCHANY {
ACE_PRINT_EXCEPTION(ex, "AMI_Primary_Replication_Strategy::replicate_request : ");
manager->handle_exception(i);
}
ACE_ENDTRY;
}
// wait until the first transaction_depth replicas replied.
event.wait();
if (!success) { // replication failed, transaction depth too high
for (size_t i =0; i < num_backups; ++i) {
ACE_TRY_NEW_ENV {
(backups[i]->*rollback)(oid ACE_ENV_ARG_PARAMETER);
ACE_TRY_CHECK;
}
ACE_CATCHALL {
}
ACE_ENDTRY;
}
ACE_THROW(FTRT::TransactionDepthTooHigh());
}
}
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