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// **********************************************************************
//
// Copyright (c) 2003-2006 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 ICE_GRID_ADAPTERCACHE_H
#define ICE_GRID_ADAPTERCACHE_H
#include <IceUtil/Mutex.h>
#include <IceUtil/Shared.h>
#include <IceGrid/Cache.h>
#include <IceGrid/Query.h>
#include <IceGrid/Internal.h>
#include <IceGrid/Allocatable.h>
namespace IceGrid
{
class AdapterCache;
class ServerEntry;
typedef IceUtil::Handle<ServerEntry> ServerEntryPtr;
typedef std::vector<ServerEntryPtr> ServerEntrySeq;
class AdapterEntry;
typedef IceUtil::Handle<AdapterEntry> AdapterEntryPtr;
class AdapterEntry : virtual public IceUtil::Shared, public IceUtil::Mutex
{
public:
AdapterEntry(AdapterCache&, const std::string&);
virtual std::vector<std::pair<std::string, AdapterPrx> > getProxies(int&, const SessionIPtr&) = 0;
virtual float getLeastLoadedNodeLoad(LoadSample) const = 0;
virtual std::string getApplication() const = 0;
virtual AdapterInfoSeq getAdapterInfo() const = 0;
virtual bool canRemove();
protected:
AdapterCache& _cache;
const std::string _id;
};
typedef IceUtil::Handle<AdapterEntry> AdapterEntryPtr;
class ServerAdapterEntry : public AdapterEntry, public Allocatable
{
public:
ServerAdapterEntry(AdapterCache&, const std::string&, const std::string&, bool, const ServerEntryPtr&);
virtual std::vector<std::pair<std::string, AdapterPrx> > getProxies(int&, const SessionIPtr&);
virtual float getLeastLoadedNodeLoad(LoadSample) const;
virtual std::string getApplication() const;
virtual AdapterInfoSeq getAdapterInfo() const;
virtual const std::string& getReplicaGroupId() const { return _replicaGroupId; }
AdapterPrx getProxy(const std::string& = std::string()) const;
virtual bool allocated(const SessionIPtr&);
virtual void released(const SessionIPtr&);
private:
ServerEntryPtr getServer() const;
const std::string _replicaGroupId;
const ServerEntryPtr _server;
};
typedef IceUtil::Handle<ServerAdapterEntry> ServerAdapterEntryPtr;
class ReplicaGroupEntry : public AdapterEntry
{
public:
ReplicaGroupEntry(AdapterCache&, const std::string&, const std::string&, const LoadBalancingPolicyPtr&);
virtual std::vector<std::pair<std::string, AdapterPrx> > getProxies(int&, const SessionIPtr&);
virtual float getLeastLoadedNodeLoad(LoadSample) const;
virtual std::string getApplication() const;
virtual AdapterInfoSeq getAdapterInfo() const;
void addReplica(const std::string&, const ServerAdapterEntryPtr&);
void removeReplica(const std::string&);
void update(const LoadBalancingPolicyPtr&);
typedef std::vector<std::pair<std::string, ServerAdapterEntryPtr> > ReplicaSeq;
private:
const std::string _application;
LoadBalancingPolicyPtr _loadBalancing;
int _loadBalancingNReplicas;
LoadSample _loadSample;
ReplicaSeq _replicas;
int _lastReplica;
static std::pointer_to_unary_function<int, int> _rand;
};
typedef IceUtil::Handle<ReplicaGroupEntry> ReplicaGroupEntryPtr;
class AdapterCache : public CacheByString<AdapterEntry>
{
public:
ServerAdapterEntryPtr addServerAdapter(const std::string&, const std::string&, bool, const ServerEntryPtr&);
ReplicaGroupEntryPtr addReplicaGroup(const std::string&, const std::string&, const LoadBalancingPolicyPtr&);
AdapterEntryPtr get(const std::string&) const;
ServerAdapterEntryPtr getServerAdapter(const std::string&) const;
ReplicaGroupEntryPtr getReplicaGroup(const std::string&) const;
void removeServerAdapter(const std::string&);
void removeReplicaGroup(const std::string&);
protected:
virtual AdapterEntryPtr addImpl(const std::string&, const AdapterEntryPtr&);
virtual AdapterEntryPtr removeImpl(const std::string&);
};
};
#endif
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