FtrsTableWriterExecStream.h

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00001 /*
00002 // $Id: //open/dev/fennel/ftrs/FtrsTableWriterExecStream.h#10 $
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_FtrsTableWriterExecStream_Included
00025 #define Fennel_FtrsTableWriterExecStream_Included
00026 
00027 #include "fennel/ftrs/FtrsTableWriter.h"
00028 #include "fennel/exec/ConduitExecStream.h"
00029 
00030 #include <boost/scoped_array.hpp>
00031 
00032 FENNEL_BEGIN_NAMESPACE
00033 
00034 class FtrsTableWriterFactory;
00035 class SXMutex;
00036 
00041 struct FENNEL_FTRS_EXPORT FtrsTableWriterExecStreamParams
00042     : public FtrsTableWriterParams
00043 {
00044     SharedFtrsTableWriterFactory pTableWriterFactory;
00045     LogicalActionType actionType;
00046     SXMutex *pActionMutex;
00047 };
00048 
00054 class FENNEL_FTRS_EXPORT FtrsTableWriterExecStream
00055     : public ConduitExecStream
00056 {
00060     RecordNum nTuples;
00061 
00066     LogicalActionType actionType;
00067 
00072     SXMutex *pActionMutex;
00073 
00077     SharedFtrsTableWriter pTableWriter;
00078 
00083     SavepointId svptId;
00084 
00088     bool isDone;
00089 
00093     boost::scoped_array<FixedBuffer> outputTupleBuffer;
00094 
00098     TupleData outputTuple;
00099 
00100     void createSavepoint();
00101     void commitSavepoint();
00102     void rollbackSavepoint();
00103 
00104 public:
00105     explicit FtrsTableWriterExecStream();
00106 
00107     // implement ExecStream
00108     virtual void prepare(FtrsTableWriterExecStreamParams const &params);
00109     virtual void getResourceRequirements(
00110         ExecStreamResourceQuantity &minQuantity,
00111         ExecStreamResourceQuantity &optQuantity);
00112     virtual void open(bool restart);
00113     virtual ExecStreamResult execute(ExecStreamQuantum const &quantum);
00114     virtual void closeImpl();
00115     virtual ExecStreamBufProvision getOutputBufProvision() const;
00116 };
00117 
00118 FENNEL_END_NAMESPACE
00119 
00120 #endif
00121 
00122 // End FtrsTableWriterExecStream.h

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