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// **********************************************************************
//
// Copyright (c) 2003-2008 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
#ifndef SUBSCRIBER_POOL_H
#define SUBSCRIBER_POOL_H
#include <IceStorm/Subscriber.h>
#include <IceUtil/Mutex.h>
#include <IceUtil/Monitor.h>
#include <IceUtil/Time.h>
#include <IceUtil/Thread.h>
#include <Ice/Identity.h>
#include <list>
#include <set>
namespace IceStorm
{
//
// Forward declarations.
//
class TraceLevels;
typedef IceUtil::Handle<TraceLevels> TraceLevelsPtr;
class Instance;
typedef IceUtil::Handle<Instance> InstancePtr;
class SubscriberPool;
typedef IceUtil::Handle<SubscriberPool> SubscriberPoolPtr;
class SubscriberPoolMonitor : public IceUtil::Thread, public IceUtil::Monitor<IceUtil::Mutex>
{
public:
SubscriberPoolMonitor(const SubscriberPoolPtr&, const IceUtil::Time&);
~SubscriberPoolMonitor();
virtual void run();
void startMonitor();
void stopMonitor();
void destroy();
private:
const SubscriberPoolPtr _manager;
const IceUtil::Time _timeout;
bool _needCheck;
bool _destroyed;
};
typedef IceUtil::Handle<SubscriberPoolMonitor> SubscriberPoolMonitorPtr;
class SubscriberPool : public IceUtil::Shared, public IceUtil::Monitor<IceUtil::Mutex>
{
public:
SubscriberPool(const InstancePtr&);
~SubscriberPool();
void flush(std::list<SubscriberPtr>&);
void flush(const SubscriberPtr&);
void add(const SubscriberPtr&);
void remove(const SubscriberPtr&);
void destroy();
//
// For use by the subscriber worker.
//
void dequeue(SubscriberPtr&, bool, const IceUtil::Time&, bool&);
//
// For use by the monitor.
//
void check();
private:
bool invariants();
const TraceLevelsPtr _traceLevels;
const unsigned int _sizeMax;
const unsigned int _sizeWarn;
const unsigned int _size;
const IceUtil::Time _timeout;
const IceUtil::Time _stallCheck;
SubscriberPoolMonitorPtr _subscriberPoolMonitor;
std::list<SubscriberPtr> _pending;
std::list<SubscriberPtr> _subscribers;
bool _destroyed;
std::list<IceUtil::ThreadPtr> _workers;
int _reap;
unsigned int _inUse;
IceUtil::Time _lastStallCheck;
IceUtil::Time _lastDequeue;
};
} // End namespace IceStorm
#endif
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