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// **********************************************************************
//
// Copyright (c) 2003 - 2004
// ZeroC, Inc.
// North Palm Beach, FL, USA
//
// 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 <IceUtil/Cache.h>
#include <vector>
#include <list>
#include <db_cxx.h>
namespace Freeze
{
class EvictorI;
struct EvictorElement;
typedef IceUtil::Handle<EvictorElement> EvictorElementPtr;
typedef IceUtil::Cache<Ice::Identity, EvictorElement> Cache;
class ObjectStore : public Cache
{
public:
ObjectStore(const std::string&, bool, EvictorI*,
const std::vector<IndexPtr>& = std::vector<IndexPtr>(), bool = false);
virtual ~ObjectStore();
void close();
bool dbHasObject(const Ice::Identity&) const;
void save(Key& key, Value& value, Ice::Byte status, DbTxn* tx);
static void marshal(const Ice::Identity&, Key&, const Ice::CommunicatorPtr&);
static void unmarshal(Ice::Identity&, const Key&, const Ice::CommunicatorPtr&);
static void marshal(const ObjectRecord&, Value&, const Ice::CommunicatorPtr&);
static void unmarshal(ObjectRecord&, const Value&, const Ice::CommunicatorPtr&);
//
// For IndexI and Iterator
//
Db* db() const;
const std::string& dbName() const;
const Ice::CommunicatorPtr& communicator() const;
EvictorI* evictor() const;
const std::string& facet() const;
protected:
virtual EvictorElementPtr load(const Ice::Identity&);
virtual void pinned(const EvictorElementPtr&, Position p);
private:
std::auto_ptr<Db> _db;
std::string _facet;
std::string _dbName;
EvictorI* _evictor;
std::vector<IndexPtr> _indices;
Ice::CommunicatorPtr _communicator;
};
struct EvictorElement : public Ice::LocalObject
{
#if defined(_MSC_VER) && (_MSC_VER <= 1200)
enum
{
clean = 0,
created = 1,
modified = 2,
destroyed = 3,
dead = 4
};
#else
//
// Clean object; can become modified or destroyed
//
static const Ice::Byte clean = 0;
//
// New object; can become clean, dead or destroyed
//
static const Ice::Byte created = 1;
//
// Modified object; can become clean or destroyed
//
static const Ice::Byte modified = 2;
//
// Being saved. Can become dead or created
//
static const Ice::Byte destroyed = 3;
//
// Exists only in the Evictor; for example the object was created
// and later destroyed (without a save in between), or it was
// destroyed on disk but is still in use. Can become created.
//
static const Ice::Byte dead = 4;
#endif
EvictorElement(ObjectStore&);
~EvictorElement();
//
// Immutable
//
ObjectStore& store;
//
// Immutable once set
//
Cache::Position cachePosition;
//
// Protected by EvictorI
//
std::list<EvictorElementPtr>::iterator evictPosition;
int usageCount;
int keepCount;
bool stale;
//
// Protected by mutex
//
IceUtil::Mutex mutex;
ObjectRecord rec;
Ice::Byte status;
};
//
// Inline member function definitions
//
inline Db*
ObjectStore::db() const
{
return _db.get();
}
inline const Ice::CommunicatorPtr&
ObjectStore::communicator() const
{
return _communicator;
}
inline EvictorI*
ObjectStore::evictor() const
{
return _evictor;
}
inline const std::string&
ObjectStore::facet() const
{
return _facet;
}
}
#endif
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