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// **********************************************************************
//
// Copyright (c) 2003-2016 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_H
#define SUBSCRIBER_H
#include <IceStorm/IceStormInternal.h>
#include <IceStorm/SubscriberRecord.h>
#include <IceStorm/Instrumentation.h>
#include <Ice/ObserverHelper.h>
#include <IceUtil/RecMutex.h>
namespace IceStorm
{
class Instance;
typedef IceUtil::Handle<Instance> InstancePtr;
class Subscriber;
typedef IceUtil::Handle<Subscriber> SubscriberPtr;
class Subscriber : public IceUtil::Shared
{
public:
static SubscriberPtr create(const InstancePtr&, const IceStorm::SubscriberRecord&);
~Subscriber();
Ice::ObjectPrx proxy() const; // Get the per subscriber object.
Ice::Identity id() const; // Return the id of the subscriber.
IceStorm::SubscriberRecord record() const; // Get the subscriber record.
// Returns false if the subscriber should be reaped.
bool queue(bool, const EventDataSeq&);
bool reap();
void resetIfReaped();
bool errored() const;
void destroy();
// To be called by the AMI callbacks only.
void completed(const Ice::AsyncResultPtr&);
void error(bool, const Ice::Exception&);
void shutdown();
void updateObserver();
enum SubscriberState
{
SubscriberStateOnline, // Online waiting to send events.
SubscriberStateOffline, // Offline, retrying.
SubscriberStateError, // Error state, awaiting reaping.
SubscriberStateReaped // Reaped.
};
virtual void flush() = 0;
protected:
void setState(SubscriberState);
Subscriber(const InstancePtr&, const IceStorm::SubscriberRecord&, const Ice::ObjectPrx&, int, int);
// Immutable
const InstancePtr _instance;
const IceStorm::SubscriberRecord _rec; // The subscriber record.
const int _retryCount; // The retryCount.
const int _maxOutstanding; // The maximum number of oustanding events.
const Ice::ObjectPrx _proxy; // The per subscriber object proxy, if any.
const Ice::ObjectPrx _proxyReplica; // The replicated per subscriber object proxy, if any.
IceUtil::Monitor<IceUtil::RecMutex> _lock;
bool _shutdown;
SubscriberState _state; // The subscriber state.
int _outstanding; // The current number of outstanding responses.
int _outstandingCount; // The current number of outstanding events when batching events (only used for metrics).
EventDataSeq _events; // The queue of events to send.
// The next time to try sending a new event if we're offline.
IceUtil::Time _next;
int _currentRetry;
IceInternal::ObserverHelperT<IceStorm::Instrumentation::SubscriberObserver> _observer;
};
bool operator==(const IceStorm::SubscriberPtr&, const Ice::Identity&);
bool operator==(const IceStorm::Subscriber&, const IceStorm::Subscriber&);
bool operator!=(const IceStorm::Subscriber&, const IceStorm::Subscriber&);
bool operator<(const IceStorm::Subscriber&, const IceStorm::Subscriber&);
}
#endif // SUBSCRIBER_H
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