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#include "publisher_impl.h"
#include "ace/OS_NS_sys_time.h"
#include "ace/Task.h"
#include "ace/Process_Mutex.h"
#include "ace/OS_NS_unistd.h"
#include <vector>
using namespace std;
struct _Subscriber
{
Subscriber_var subscriber;
bool unsubscribed;
unsigned int count;
};
class Publisher_impl::Worker : public ACE_Task_Base
{
public:
Worker(Publisher_impl * _owner);
~Worker();
void addSubscriber(Subscriber_ptr subscriber);
virtual int svc (void);
void terminate();
private:
bool terminated;
vector<_Subscriber> subscribers;
TAO_SYNCH_MUTEX mutex;
Publisher_impl * owner;
};
Publisher_impl::Worker::Worker(Publisher_impl * _owner)
: owner(_owner)
{
terminated = false;
}
Publisher_impl::Worker::~Worker()
{
terminated = true;
}
void Publisher_impl::Worker::addSubscriber(Subscriber_ptr subscriber)
{
ACE_GUARD (TAO_SYNCH_MUTEX, ace_mon, this->mutex);
subscribers.push_back(_Subscriber());
_Subscriber& s = subscribers.back();
s.unsubscribed = false;
s.subscriber = Subscriber::_duplicate(subscriber);
s.count = 0;
}
int Publisher_impl::Worker::svc (void)
{
double data = 0.0;
bool doShutdown = false;
unsigned long iteration = 0;
ACE_Time_Value tv;
tv.set(0.01);
while (!terminated)
{
data += 0.01;
++iteration;
{
ACE_GUARD_RETURN (TAO_SYNCH_MUTEX, ace_mon, this->mutex, 0);
doShutdown = subscribers.size() > 0;
for (vector<_Subscriber>::iterator iter = subscribers.begin();
iter != subscribers.end(); ++iter)
{
if (!iter->unsubscribed)
{
doShutdown = false;
try
{
if (!CORBA::is_nil(iter->subscriber.in ()))
iter->subscriber->onData(data);
else
iter->unsubscribed = true;
++iter->count;
}
catch (...)
{
iter->unsubscribed = true;
}
}
}
}
if (iteration % 200 == 0)
{
ACE_GUARD_RETURN (TAO_SYNCH_MUTEX, ace_mon, this->mutex, 0);
for (vector<_Subscriber>::iterator iter = subscribers.begin();
iter != subscribers.end(); ++iter)
{
if (!iter->unsubscribed)
{
try
{
iter->subscriber->isAlive();
}
catch (...)
{
iter->unsubscribed = true;
}
}
}
}
if (doShutdown)
owner->shutdown();
else
ACE_OS::sleep(tv);
}
return 0;
}
void Publisher_impl::Worker::terminate()
{
terminated = true;
}
Publisher_impl::Publisher_impl(CORBA::ORB_ptr orb)
: orb_ (CORBA::ORB::_duplicate (orb))
{
worker = new Worker(this);
worker->activate();
}
Publisher_impl::~Publisher_impl()
{
worker->terminate();
worker->thr_mgr()->wait();
delete worker;
}
void subscribe (::Subscriber_ptr subscriber);
void
Publisher_impl::subscribe(
::Subscriber_ptr subscriber
)
{
worker->addSubscriber(subscriber);
}
void
Publisher_impl::shutdown (
)
{
this->orb_->shutdown (0);
worker->terminate();
}
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