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// **********************************************************************
//
// Copyright (c) 2003-2010 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 TOPIC_I_H
#define TOPIC_I_H
#include <IceStorm/IceStormInternal.h>
#include <IceStorm/Election.h>
#include <list>
namespace IceStorm
{
// Forward declarations
class Instance;
typedef IceUtil::Handle<Instance> InstancePtr;
class Subscriber;
typedef IceUtil::Handle<Subscriber> SubscriberPtr;
class DatabaseCache;
typedef IceUtil::Handle<DatabaseCache> DatabaseCachePtr;
class TopicImpl : public IceUtil::Shared
{
public:
TopicImpl(const InstancePtr&, const std::string&, const Ice::Identity&, const SubscriberRecordSeq&);
~TopicImpl();
std::string getName() const;
Ice::ObjectPrx getPublisher() const;
Ice::ObjectPrx getNonReplicatedPublisher() const;
void subscribe(const QoS&, const Ice::ObjectPrx&);
Ice::ObjectPrx subscribeAndGetPublisher(const QoS&, const Ice::ObjectPrx&);
void unsubscribe(const Ice::ObjectPrx&);
TopicLinkPrx getLinkProxy();
void link(const TopicPrx&, Ice::Int);
void unlink(const TopicPrx&);
LinkInfoSeq getLinkInfoSeq() const;
void reap(const Ice::IdentitySeq&);
void destroy();
IceStormElection::TopicContent getContent() const;
void update(const SubscriberRecordSeq&);
// Internal methods
bool destroyed() const;
Ice::Identity id() const;
TopicPrx proxy() const;
void shutdown();
void publish(bool, const EventDataSeq&);
// Observer methods.
void observerAddSubscriber(const IceStormElection::LogUpdate&, const SubscriberRecord&);
void observerRemoveSubscriber(const IceStormElection::LogUpdate&, const Ice::IdentitySeq&);
void observerDestroyTopic(const IceStormElection::LogUpdate&);
Ice::ObjectPtr getServant() const;
private:
IceStormElection::LogUpdate destroyInternal(const IceStormElection::LogUpdate&, bool);
void removeSubscribers(const Ice::IdentitySeq&);
//
// Immutable members.
//
const Ice::ObjectPrx _publisherReplicaProxy;
const InstancePtr _instance;
const std::string _name; // The topic name
const Ice::Identity _id; // The topic identity
const std::string _envName;
const DatabaseCachePtr _databaseCache; // The database cache.
/*const*/ Ice::ObjectPrx _publisherPrx; // The actual publisher proxy.
/*const*/ TopicLinkPrx _linkPrx; // The link proxy.
Ice::ObjectPtr _servant; // The topic implementation servant.
// Mutex protecting the subscribers.
IceUtil::Mutex _subscribersMutex;
//
// We keep a vector of subscribers since the optimized behaviour
// should be publishing events, not searching through the list of
// subscribers for a particular subscriber. I tested
// vector/list/map and although there was little difference vector
// was the fastest of the three.
//
std::vector<SubscriberPtr> _subscribers;
bool _destroyed; // Has this Topic been destroyed?
};
typedef IceUtil::Handle<TopicImpl> TopicImplPtr;
} // End namespace IceStorm
#endif
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