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// **********************************************************************
//
// Copyright (c) 2003-2015 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 FREEZE_OBJECT_STORE_H
#define FREEZE_OBJECT_STORE_H
#include <Ice/Ice.h>
#include <Ice/Identity.h>
#include <Freeze/DB.h>
#include <Freeze/EvictorStorage.h>
#include <Freeze/Index.h>
#include <Freeze/TransactionI.h>
#include <IceUtil/Cache.h>
#include <vector>
#include <list>
#include <db_cxx.h>
namespace Freeze
{
template<class T> class EvictorI;
class EvictorIBase;
class ObjectStoreBase
{
public:
ObjectStoreBase(const std::string&, const std::string&, bool, EvictorIBase*,
const std::vector<IndexPtr>&, bool);
virtual ~ObjectStoreBase();
const Ice::ObjectPtr& sampleServant() const;
bool dbHasObject(const Ice::Identity&, const TransactionIPtr&) const;
void save(Dbt&, Dbt&, Ice::Byte, DbTxn*);
//
// This base class encapsulates a BasicStream, which allows us to avoid
// making any extra copies of marshaled data when updating the database.
//
class Marshaler
{
public:
Marshaler(const Ice::CommunicatorPtr&, const Ice::EncodingVersion&);
void getDbt(Dbt&) const;
protected:
IceInternal::BasicStream _os;
};
class KeyMarshaler : public Marshaler
{
public:
KeyMarshaler(const Ice::Identity&, const Ice::CommunicatorPtr&, const Ice::EncodingVersion&);
};
class ValueMarshaler : public Marshaler
{
public:
ValueMarshaler(const ObjectRecord&, const Ice::CommunicatorPtr&, const Ice::EncodingVersion&, bool);
};
static void unmarshal(Ice::Identity&, const Key&, const Ice::CommunicatorPtr&, const Ice::EncodingVersion&);
static void unmarshal(ObjectRecord&, const Value&, const Ice::CommunicatorPtr&, const Ice::EncodingVersion&, bool);
bool load(const Ice::Identity&, const TransactionIPtr&, ObjectRecord&);
void update(const Ice::Identity&, const ObjectRecord&, const TransactionIPtr&);
bool insert(const Ice::Identity&, const ObjectRecord&, const TransactionIPtr&);
bool remove(const Ice::Identity&, const TransactionIPtr&);
EvictorIBase* evictor() const;
//
// For IndexI and Iterator
//
Db* db() const;
const std::string& dbName() const;
const Ice::CommunicatorPtr& communicator() const;
const Ice::EncodingVersion& encoding() const;
const std::string& facet() const;
bool keepStats() const;
protected:
bool loadImpl(const Ice::Identity&, ObjectRecord&);
private:
IceUtil::UniquePtr<Db> _db;
std::string _facet;
std::string _dbName;
EvictorIBase* _evictor;
std::vector<IndexPtr> _indices;
Ice::CommunicatorPtr _communicator;
Ice::EncodingVersion _encoding;
Ice::ObjectPtr _sampleServant;
bool _keepStats;
};
template<class T>
class ObjectStore : public ObjectStoreBase, public IceUtil::Cache<Ice::Identity, T>
{
public:
ObjectStore(const std::string& facet, const std::string facetType,
bool createDb, EvictorIBase* evictor,
const std::vector<IndexPtr>& indices = std::vector<IndexPtr>(),
bool populateEmptyIndices = false) :
ObjectStoreBase(facet, facetType, createDb, evictor, indices, populateEmptyIndices)
{
}
using ObjectStoreBase::load;
typedef IceUtil::Cache<Ice::Identity, T> Cache;
protected:
virtual IceUtil::Handle<T>
load(const Ice::Identity& ident)
{
ObjectRecord rec;
if(loadImpl(ident, rec))
{
return new T(rec, *this);
}
else
{
return 0;
}
}
virtual void
pinned(const IceUtil::Handle<T>& element, typename Cache::Position p)
{
element->init(p);
}
};
//
// Inline member function definitions
//
inline Db*
ObjectStoreBase::db() const
{
return _db.get();
}
inline const Ice::CommunicatorPtr&
ObjectStoreBase::communicator() const
{
return _communicator;
}
inline const Ice::EncodingVersion&
ObjectStoreBase::encoding() const
{
return _encoding;
}
inline EvictorIBase*
ObjectStoreBase::evictor() const
{
return _evictor;
}
inline const std::string&
ObjectStoreBase::facet() const
{
return _facet;
}
inline bool
ObjectStoreBase::keepStats() const
{
return _keepStats;
}
inline const Ice::ObjectPtr&
ObjectStoreBase::sampleServant() const
{
return _sampleServant;
}
}
#endif
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