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//
// Copyright (c) ZeroC, Inc. All rights reserved.
//
#ifndef ICEGRID_REAPER_THREAD_H
#define ICEGRID_REAPER_THREAD_H
#include <Ice/Logger.h>
#include <Ice/LocalException.h>
#include <Ice/LoggerUtil.h>
#include <Ice/Connection.h>
#include <list>
namespace IceGrid
{
class Reapable
{
public:
virtual ~Reapable() = default;
virtual void heartbeat() const { };
virtual std::chrono::steady_clock::time_point timestamp() const = 0;
virtual void destroy(bool) = 0;
};
template<class T>
class SessionReapable : public Reapable
{
public:
SessionReapable(const std::shared_ptr<Ice::Logger>& logger, const std::shared_ptr<T>& session) :
_logger(logger), _session(session)
{
}
std::chrono::steady_clock::time_point
timestamp() const override
{
return _session->timestamp();
}
void
destroy(bool shutdown) override
{
try
{
if(shutdown)
{
_session->shutdown();
}
else
{
_session->destroy(Ice::Current());
}
}
catch(const Ice::ObjectNotExistException&)
{
}
catch(const Ice::LocalException& ex)
{
Ice::Warning out(_logger);
out << "unexpected exception while reaping session:\n" << ex;
}
}
protected:
const std::shared_ptr<Ice::Logger> _logger;
const std::shared_ptr<T> _session;
};
template<class T>
class SessionReapableWithHeartbeat final : public SessionReapable<T>
{
public:
SessionReapableWithHeartbeat(const std::shared_ptr<Ice::Logger>& logger, const std::shared_ptr<T>& session) :
SessionReapable<T>(logger, session)
{
}
void
heartbeat() const override
{
try
{
SessionReapable<T>::_session->keepAlive(Ice::Current());
}
catch(Ice::Exception&)
{
}
}
};
class ReapThread final
{
public:
ReapThread();
void terminate();
void join();
void add(const std::shared_ptr<Reapable>&, std::chrono::seconds, const std::shared_ptr<Ice::Connection>& = nullptr);
void connectionHeartbeat(const std::shared_ptr<Ice::Connection>&);
void connectionClosed(const std::shared_ptr<Ice::Connection>&);
private:
void run();
bool calcWakeInterval();
Ice::CloseCallback _closeCallback;
Ice::HeartbeatCallback _heartbeatCallback;
std::chrono::milliseconds _wakeInterval;
bool _terminated;
struct ReapableItem
{
std::shared_ptr<Reapable> item;
std::shared_ptr<Ice::Connection> connection;
std::chrono::milliseconds timeout;
};
std::list<ReapableItem> _sessions;
std::map<std::shared_ptr<Ice::Connection>, std::set<std::shared_ptr<Reapable>> > _connections;
std::mutex _mutex;
std::condition_variable _condVar;
std::thread _thread;
};
}
#endif
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