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89 lines
2.4 KiB
C++
89 lines
2.4 KiB
C++
//------------------------------------------------------------------------------
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/*
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Copyright (c) 2011-2013, OpenCoin, Inc.
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*/
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//==============================================================================
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#ifndef RIPPLE_HASHEDOBJECTSTORE_H
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#define RIPPLE_HASHEDOBJECTSTORE_H
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/** Persistency layer for hashed objects.
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*/
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// VFALCO TODO Move all definitions to the .cpp
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class HashedObjectStore : LeakChecked <HashedObjectStore>
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{
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public:
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HashedObjectStore (int cacheSize, int cacheAge);
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bool isLevelDB ()
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{
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return mLevelDB;
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}
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float getCacheHitRate ()
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{
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return mCache.getHitRate ();
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}
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bool store (HashedObjectType type, uint32 index, Blob const& data,
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uint256 const& hash)
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{
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if (mLevelDB)
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return storeLevelDB (type, index, data, hash);
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return storeSQLite (type, index, data, hash);
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}
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HashedObject::pointer retrieve (uint256 const& hash)
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{
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if (mLevelDB)
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return retrieveLevelDB (hash);
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return retrieveSQLite (hash);
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}
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bool storeSQLite (HashedObjectType type, uint32 index, Blob const& data,
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uint256 const& hash);
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HashedObject::pointer retrieveSQLite (uint256 const& hash);
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void bulkWriteSQLite (Job&);
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bool storeLevelDB (HashedObjectType type, uint32 index, Blob const& data,
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uint256 const& hash);
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HashedObject::pointer retrieveLevelDB (uint256 const& hash);
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void bulkWriteLevelDB (Job&);
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void waitWrite ();
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void tune (int size, int age);
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void sweep ()
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{
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mCache.sweep ();
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mNegativeCache.sweep ();
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}
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int getWriteLoad ();
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int import (const std::string& fileName);
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private:
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static HashedObject::pointer LLRetrieve (uint256 const& hash, leveldb::DB* db);
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static void LLWrite (boost::shared_ptr<HashedObject> ptr, leveldb::DB* db);
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static void LLWrite (const std::vector< boost::shared_ptr<HashedObject> >& set, leveldb::DB* db);
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private:
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TaggedCache<uint256, HashedObject, UptimeTimerAdapter> mCache;
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KeyCache <uint256, UptimeTimerAdapter> mNegativeCache;
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boost::mutex mWriteMutex;
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boost::condition_variable mWriteCondition;
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int mWriteGeneration;
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int mWriteLoad;
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std::vector< boost::shared_ptr<HashedObject> > mWriteSet;
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bool mWritePending;
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bool mLevelDB;
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bool mEphemeralDB;
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};
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#endif
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// vim:ts=4
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