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// $Id$
#include "orbsvcs/FtRtEvent/EventChannel/AMI_Primary_Replication_Strategy.h"
#include "ace/Synch_T.h"
#include "orbsvcs/FtRtEvent/EventChannel/GroupInfoPublisher.h"
#include "orbsvcs/FtRtEvent/EventChannel/Request_Context_Repository.h"
#include "orbsvcs/FtRtEvent/EventChannel/create_persistent_poa.h"
#include "orbsvcs/FtRtEvent/EventChannel/Update_Manager.h"
#include "tao/Utils/PolicyList_Destroyer.h"
#include "orbsvcs/FtRtEvent/EventChannel/ObjectGroupManagerHandler.h"
#include "tao/Utils/Implicit_Deactivator.h"
#include "../Utils/resolve_init.h"
#include "../Utils/ScopeGuard.h"
#include "../Utils/Log.h"
ACE_RCSID (EventChannel,
AMI_Primary_Replication_Strategy,
"$Id$")
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
AMI_Primary_Replication_Strategy::AMI_Primary_Replication_Strategy(bool mt)
: handler_(this),
mutex_ (mt ? new ACE_SYNCH_RW_MUTEX : 0)
{
}
AMI_Primary_Replication_Strategy::~AMI_Primary_Replication_Strategy()
{
running_= false;
this->wait();
}
int AMI_Primary_Replication_Strategy::acquire_read (void)
{
return mutex_ ? mutex_->acquire_read() : 0;
}
int AMI_Primary_Replication_Strategy::acquire_write (void)
{
return mutex_ ? mutex_->acquire_write() : 0;
}
int AMI_Primary_Replication_Strategy::release (void)
{
return mutex_ ? mutex_->release() : 0;
}
int AMI_Primary_Replication_Strategy::svc()
{
try{
int argc = 0;
char** argv = 0;
orb_ = CORBA::ORB_init (argc, argv);
root_poa_ = resolve_init<PortableServer::POA>(orb_.in(), "RootPOA");
// create POAManager
mgr_ = root_poa_->the_POAManager();
mgr_->activate();
PortableServer::IdUniquenessPolicy_var id_uniqueness_policy =
root_poa_->create_id_uniqueness_policy(PortableServer::MULTIPLE_ID);
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);
id_uniqueness_policy->destroy();
running_ = true;
while (running_) {
if (orb_->work_pending())
orb_->perform_work();
}
orb_->destroy();
}
catch (const CORBA::Exception& ex){
ex._tao_print_exception ("AMI_Primary_Replication_Strategy::svc");
running_ = false;
return -1;
}
running_ = false;
return 0;
}
void
AMI_Primary_Replication_Strategy::replicate_request(
const FTRT::State& state,
RollbackOperation rollback,
const FtRtecEventChannelAdmin::ObjectId& oid)
{
ACE_Auto_Event event;
Update_Manager* manager = 0;
bool success = false;
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) {
TAO_FTRTEC::Log(3, "Throwing FTRT::TransactionDepthTooHigh\n");
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) {
PortableServer::ObjectId oid;
try{
FTRT::AMI_UpdateableHandler_ptr handler = handler_.activate(manager, i, oid);
FtRtecEventChannelAdmin::EventChannel_ptr obj = backups[i];
// send set_update request to all the backup replicas
obj->sendc_set_update(handler, state);
}
catch (const CORBA::Exception& ex){
ex._tao_print_exception (
"AMI_Primary_Replication_Strategy::replicate_request : ");
manager->handle_exception(i);
if (oid.length())
poa_->deactivate_object(oid);
}
}
// 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) {
try{
(backups[i]->*rollback)(oid);
}
catch (...){
}
}
TAO_FTRTEC::Log(3, "Throwing FTRT::TransactionDepthTooHigh\n");
throw FTRT::TransactionDepthTooHigh();
}
}
void
AMI_Primary_Replication_Strategy::add_member(const FTRT::ManagerInfo & info,
CORBA::ULong object_group_ref_version)
{
ACE_Auto_Event event;
const FtRtecEventChannelAdmin::EventChannelList& backups =
GroupInfoPublisher::instance()->backups();
size_t num_backups = backups.length();
ObjectGroupManagerHandler add_member_handler(event, num_backups+1);
// The extra one is to prevent the event been signaled prematurely.
PortableServer::ObjectId_var oid =
root_poa_->activate_object(&add_member_handler);
TAO::Utils::Implicit_Deactivator deactivator(&add_member_handler);
CORBA::Object_var obj =
root_poa_->id_to_reference(oid.in());
FTRT::AMI_ObjectGroupManagerHandler_var handler =
FTRT::AMI_ObjectGroupManagerHandler::_narrow(obj.in());
for (unsigned i = 0; i < num_backups; ++i) {
try{
backups[i]->sendc_add_member(handler.in(),
info,
object_group_ref_version);
}
catch (...){
add_member_handler.add_member_excep(0);
}
}
// decrement the number of members so the event can be signaled once
// all replys have been received.
add_member_handler.add_member_excep(0);
event.wait();
}
TAO_END_VERSIONED_NAMESPACE_DECL
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