TransientTopicI.h

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// **********************************************************************
//
// Copyright (c) 2003-2017 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 TRANSIENT_TOPIC_I_H
#define TRANSIENT_TOPIC_I_H
 
#include <IceStorm/IceStormInternal.h>
 
namespace IceStorm
{
 
    // Forward declarations.
    class Instance;
    typedef IceUtil::Handle<Instance> InstancePtr;
 
    class Subscriber;
    typedef IceUtil::Handle<Subscriber> SubscriberPtr;
 
    class TransientTopicImpl : public TopicInternal, public IceUtil::Mutex
    {
    public:
 
        TransientTopicImpl(const InstancePtr&, const std::string&, const Ice::Identity&);
        ~TransientTopicImpl();
 
        virtual std::string getName(const Ice::Current&) const;
        virtual Ice::ObjectPrx getPublisher(const Ice::Current&) const;
        virtual Ice::ObjectPrx getNonReplicatedPublisher(const Ice::Current&) const;
        virtual void subscribe(const QoS&, const Ice::ObjectPrx&, const Ice::Current&);
        virtual Ice::ObjectPrx subscribeAndGetPublisher(const QoS&, const Ice::ObjectPrx&, const Ice::Current&);
        virtual void unsubscribe(const Ice::ObjectPrx&, const Ice::Current&);
        virtual TopicLinkPrx getLinkProxy(const Ice::Current&);
        virtual void link(const TopicPrx&, Ice::Int, const Ice::Current&);
        virtual void unlink(const TopicPrx&, const Ice::Current&);
        virtual LinkInfoSeq getLinkInfoSeq(const Ice::Current&) const;
        virtual Ice::IdentitySeq getSubscribers(const Ice::Current&) const;
        virtual void destroy(const Ice::Current&);
        virtual void reap(const Ice::IdentitySeq&, const Ice::Current&);
 
        // Internal methods
        bool destroyed() const;
        Ice::Identity id() const;
        void publish(bool, const EventDataSeq&);
 
        void shutdown();
 
    private:
 
        //
        // Immutable members.
        //
        const InstancePtr _instance;
        const std::string _name; // The topic name
        const Ice::Identity _id; // The topic identity
 
        /*const*/ Ice::ObjectPrx _publisherPrx;
        /*const*/ TopicLinkPrx _linkPrx;
 
        //
        // 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<TransientTopicImpl> TransientTopicImplPtr;
 
} // End namespace IceStorm
 
#endif