LbmChopperExecStream.h

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00001 /*
00002 // $Id: //open/dev/fennel/lucidera/bitmap/LbmChopperExecStream.h#6 $
00003 // Fennel is a library of data storage and processing components.
00004 // Copyright (C) 2005-2009 LucidEra, Inc.
00005 // Copyright (C) 2005-2009 The Eigenbase Project
00006 //
00007 // This program is free software; you can redistribute it and/or modify it
00008 // under the terms of the GNU General Public License as published by the Free
00009 // Software Foundation; either version 2 of the License, or (at your option)
00010 // any later version approved by The Eigenbase Project.
00011 //
00012 // This program is distributed in the hope that it will be useful,
00013 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00014 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015 // GNU General Public License for more details.
00016 //
00017 // You should have received a copy of the GNU General Public License
00018 // along with this program; if not, write to the Free Software
00019 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00020 */
00021 
00022 #ifndef Fennel_LbmChopperExecStream_Included
00023 #define Fennel_LbmChopperExecStream_Included
00024 
00025 #include "fennel/tuple/TupleData.h"
00026 #include "fennel/exec/ConfluenceExecStream.h"
00027 #include "fennel/exec/DynamicParam.h"
00028 #include "fennel/lucidera/bitmap/LbmByteSegment.h"
00029 #include "fennel/lucidera/bitmap/LbmSeqSegmentReader.h"
00030 #include "fennel/lucidera/bitmap/LbmSegmentWriter.h"
00031 
00032 FENNEL_BEGIN_NAMESPACE
00033 
00038 struct LbmChopperExecStreamParams : public ConfluenceExecStreamParams
00039 {
00045     DynamicParamId ridLimitParamId;
00046 };
00047 
00061 class FENNEL_LBM_EXPORT LbmChopperExecStream
00062     : public ConfluenceExecStream
00063 {
00064     enum LbmChopperState {
00065         LBM_STATE_NONE = 0,
00066         LBM_STATE_READ,
00067         LBM_STATE_WRITE,
00068         LBM_STATE_PRODUCE,
00069         LBM_STATE_DONE
00070     };
00071 
00072     DynamicParamId ridLimitParamId;
00073 
00077     RecordNum ridLimit;
00078 
00082     LbmSeqSegmentReader segmentReader;
00083 
00087     TupleData inputTuple;
00088 
00092     LbmByteSegment inputSegment;
00093 
00097     LbmSegmentWriter segmentWriter;
00098 
00102     SegPageLock writerPageLock;
00103 
00107     uint pageSize;
00108 
00112     LbmChopperState state;
00113 
00117     bool writePending;
00118 
00122     bool producePending;
00123 
00127     LcsRid currentSrid;
00128 
00132     LcsRid currentEndRid;
00133 
00138     ExecStreamResult readSegment();
00139 
00145     bool writeSegment();
00146 
00150     bool produceTuple();
00151 
00152 public:
00153     explicit LbmChopperExecStream();
00154     virtual void prepare(LbmChopperExecStreamParams const &params);
00155     virtual void open(bool restart);
00156     virtual ExecStreamResult execute(ExecStreamQuantum const &quantum);
00157     virtual void getResourceRequirements(
00158         ExecStreamResourceQuantity &minQuantity,
00159         ExecStreamResourceQuantity &optQuantity);
00160     virtual void closeImpl();
00161 };
00162 
00163 FENNEL_END_NAMESPACE
00164 
00165 #endif
00166 
00167 // End LbmChopperExecStream.h

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