Observers.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 OBSERVERS_H
#define OBSERVERS_H
 
#include <Ice/Ice.h>
#include <IceUtil/IceUtil.h>
#include <IceStorm/Election.h>
#include <IceStorm/Replica.h>
 
#ifdef __SUNPRO_CC
#  pragma error_messages(off,hidef)
#endif
 
namespace IceStorm
{
    class Instance;
    typedef IceUtil::Handle<Instance> InstancePtr;
    class TraceLevels;
    typedef IceUtil::Handle<TraceLevels> TraceLevelsPtr;
}
 
namespace IceStormElection
{
 
    class Observers : public IceUtil::Shared, public IceUtil::Mutex
    {
    public:
        Observers(const IceStorm::InstancePtr&);
 
        void setMajority(unsigned int);
 
        // Check that we have enough nodes for replication.
        bool check();
        void clear();
 
        void init(const std::set<IceStormElection::GroupNodeInfo>&, const LogUpdate&, const TopicContentSeq&);
        void createTopic(const LogUpdate&, const std::string&);
        void destroyTopic(const LogUpdate&, const std::string&);
        void addSubscriber(const LogUpdate&, const std::string&, const IceStorm::SubscriberRecord&);
        void removeSubscriber(const LogUpdate&, const std::string&, const Ice::IdentitySeq&);
        void getReapedSlaves(std::vector<int>&);
 
    private:
 
        void wait(const std::string&);
 
        const IceStorm::TraceLevelsPtr _traceLevels;
        unsigned int _majority;
        struct ObserverInfo
        {
            ObserverInfo(int i, const ReplicaObserverPrx& o, const Ice::AsyncResultPtr& r = 0) :
                id(i), observer(o), result(r) {}
            int id;
            ReplicaObserverPrx observer;
            ::Ice::AsyncResultPtr result;
        };
        std::vector<ObserverInfo> _observers;
        IceUtil::Mutex _reapedMutex;
        std::vector<int> _reaped;
    };
    typedef IceUtil::Handle<Observers> ObserversPtr;
 
}
 
#ifdef __SUNPRO_CC
#  pragma error_messages(default,hidef)
#endif
 
#endif // OBSERVERS_H