178 lines
3.2 KiB
C++
178 lines
3.2 KiB
C++
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/*
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----
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This file is part of SECONDO.
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Copyright (C) 2012, University in Hagen, Department of Computer Science,
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Database Systems for New Applications.
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SECONDO is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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SECONDO is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with SECONDO; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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----
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//paragraph [1] Title: [{\Large \bf \begin{center}] [\end{center}}]
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//paragraph [10] Footnote: [{\footnote{] [}}]
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//[TOC] [\tableofcontents]
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//[_] [\_]
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//[&] [\&]
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//[x] [\ensuremath{\times}]
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//[->] [\ensuremath{\rightarrow}]
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//[>] [\ensuremath{>}]
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//[<] [\ensuremath{<}]
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//[ast] [\ensuremath{\ast}]
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*/
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/*
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[1] Class DServerShuffleSender Definition
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\begin{center}
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April 2012 Thomas Achmann
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\end{center}
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[TOC]
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0 Description
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The class ~DServerShuffleSender~ sends the relation data on
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the workers to the workers of the new darray, where it will be received
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1 Preliminaries
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1.1 Defines
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*/
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#ifndef H_DSERVERSHUFFLESENDER_H
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#define H_DSERVERSHUFFLESENDER_H
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/*
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1.3 Includes
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*/
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#include "zthread/Runnable.h"
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#include "TupleFifoQueue.h"
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/*
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1.4 Forward Declarations
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*/
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class ThreadedMemoryCounter;
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/*
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2 Class ~DServerThreadRunner~
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* derives from class ~ZThread::Runnable~
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*/
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class DServerShuffleSender : public ZThread::Runnable
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{
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public:
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/*
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2.1 Default Constructor
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* Automatically created
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2.2 Constructor
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* const string[&] inDestHost - the host name of the worker, where
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the new darray index data is stored
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* const string[&] inToPort - the port number (as string) of the worker,where
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the new darray index data is stored
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* MemCntr[ast] inMemCntr - a pointer to a datastructure, where the used
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memory is counted
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*/
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DServerShuffleSender(const std::string& inDestHost,
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const std::string& inToPort,
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ThreadedMemoryCounter* inMemCntr)
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: ZThread::Runnable()
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, m_destHost(inDestHost)
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, m_toPort(inToPort)
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, m_runit(true)
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, m_memCntr(inMemCntr) {}
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/*
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2.3 Destructor
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*/
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virtual ~DServerShuffleSender() { assert(!m_runit && m_tfq.empty()); }
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/*
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2.5 Modifying Tuplequeue
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2.5.1 Method ~void AppendTuple~
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appends a tuple to the tuple queue
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* Tuple[ast] - the tuple to be appended
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*/
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void AppendTuple(Tuple* t)
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{
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m_tfq.put(t);
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}
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/*
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2.5.2 Method ~void done~
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terminates the tuple queue
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*/
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void done()
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{
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m_runit = false;
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m_tfq.put(NULL); // dummy to wake up waiting threads
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}
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/*
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2.6 Running
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2.6.1 Method ~void run~
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*/
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void run();
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/*
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2.8 Private Section
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*/
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private:
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/*
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2.8.1 Private Methods
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*/
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// n/a
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/*
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2.8.1 Private Members
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*/
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TupleFifoQueue m_tfq;
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std::string m_destHost;
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std::string m_toPort;
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bool m_runit;
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ThreadedMemoryCounter* m_memCntr;
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/*
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2.9 End of Class
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*/
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};
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#endif // H_DSERVERSHUFFLESENDER_H
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