BTreeRecoveryFactory.h

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00001 /*
00002 // $Id: //open/dev/fennel/btree/BTreeRecoveryFactory.h#9 $
00003 // Fennel is a library of data storage and processing components.
00004 // Copyright (C) 2005-2009 The Eigenbase Project
00005 // Copyright (C) 2005-2009 SQLstream, Inc.
00006 // Copyright (C) 2005-2009 LucidEra, Inc.
00007 // Portions Copyright (C) 1999-2009 John V. Sichi
00008 //
00009 // This program is free software; you can redistribute it and/or modify it
00010 // under the terms of the GNU General Public License as published by the Free
00011 // Software Foundation; either version 2 of the License, or (at your option)
00012 // any later version approved by The Eigenbase Project.
00013 //
00014 // This program is distributed in the hope that it will be useful,
00015 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00016 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00017 // GNU General Public License for more details.
00018 //
00019 // You should have received a copy of the GNU General Public License
00020 // along with this program; if not, write to the Free Software
00021 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00022 */
00023 
00024 #ifndef Fennel_BTreeRecoveryFactory_Included
00025 #define Fennel_BTreeRecoveryFactory_Included
00026 
00027 #include "fennel/txn/LogicalTxnParticipantFactory.h"
00028 #include "fennel/segment/SegmentAccessor.h"
00029 
00030 #include <hash_map>
00031 
00032 FENNEL_BEGIN_NAMESPACE
00033 
00034 class LogicalTxnParticipant;
00035 class StoredTypeDescriptorFactory;
00036 
00041 class FENNEL_BTREE_EXPORT BTreeRecoveryFactory
00042     : public LogicalTxnParticipantFactory
00043 {
00044     SegmentAccessor segmentAccessor;
00045     SegmentAccessor scratchAccessor;
00046     StoredTypeDescriptorFactory const &typeFactory;
00047 
00048     std::hash_map<PageId,SharedLogicalTxnParticipant> writerMap;
00049 
00050 public:
00051     explicit BTreeRecoveryFactory(
00052         SegmentAccessor segmentAccessor,
00053         SegmentAccessor scratchAccessor,
00054         StoredTypeDescriptorFactory const &typeFactory);
00055 
00056     // implement the LogicalTxnParticipantFactory interface
00057     virtual SharedLogicalTxnParticipant loadParticipant(
00058         LogicalTxnClassId classId,
00059         ByteInputStream &logStream);
00060 
00061     static LogicalTxnClassId getParticipantClassId();
00062 };
00063 
00064 FENNEL_END_NAMESPACE
00065 
00066 #endif
00067 
00068 // End BTreeRecoveryFactory.h

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