190 lines
4.7 KiB
C++
190 lines
4.7 KiB
C++
/*
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----
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This file is part of SECONDO.
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Copyright (C) 2004, 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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//characters [1] Type: [] []
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//characters [2] Type: [] []
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//[ae] [\"{a}]
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//[oe] [\"{o}]
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//[ue] [\"{u}]
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//[ss] [{\ss}]
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//[Ae] [\"{A}]
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//[Oe] [\"{O}]
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//[Ue] [\"{U}]
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//[x] [$\times $]
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//[->] [$\rightarrow $]
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//[toc] [\tableofcontents]
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[1] Implementation of operation createSSPHandler.
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[toc]
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1 Operation createSSPHandler implementation
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*/
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// #include "Algebras/Relation-C++/RelationAlgebra.h"
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#include "QueryProcessor.h"
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#include "ListUtils.h"
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#include "Generic/HandlerIdle.h"
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// #include "Stream.h"
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// #include "DistributeStreamServer.h"
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extern NestedList* nl;
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extern QueryProcessor* qp;
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extern AlgebraManager* am;
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namespace continuousqueries {
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/*
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1.1 Operation createSSPHandler TypeMapping
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*/
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ListExpr createSSPHandler_TM(ListExpr args) {
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// the list is coded as ( (<type> <query part>) (<type> <query part>) )
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std::cout << "createSSPHandler: TypeMapping" << endl;
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std::cout << "Argument: " << nl->ToString(args) << endl;
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// Check for text x int -> int
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if (!nl->HasLength(args,2))
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return listutils::typeError(" two arguments are expected");
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ListExpr arg1Type = nl->First(args);
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ListExpr arg2Type = nl->Second(args);
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// Check first argument (hostname)
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if (!nl->HasLength(arg1Type, 2))
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return listutils::typeError(" internal error (hostname) ");
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if (!CcString::checkType(nl->First(arg1Type)))
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return listutils::typeError(" string as hostname is expected");
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// Check second argument (portnumber)
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if (!nl->HasLength(arg2Type, 2))
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return listutils::typeError(" internal error (portnumber) ");
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if(!CcInt::checkType(nl->First(arg2Type)))
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return listutils::typeError(" portnummer not an CcInt ");
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if(!listutils::isNumeric(nl->Second(arg2Type)))
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return listutils::typeError(
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" portnumber can't be converted to numeric "
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);
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if(listutils::getNumValue(nl->Second(arg2Type)) < 0 ||
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listutils::getNumValue(nl->Second(arg2Type)) > 65535 )
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return listutils::typeError(
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" portnumber between 0 and 65535 expected "
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);
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return arg2Type;
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}
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/*
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1.2 Operation createSSPHandler ValueMappings
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*/
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int createSSPHandler_VM(Word* args, Word& result, int message,
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Word& local, Supplier s) {
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CcString* cchost = (CcString*) args[0].addr;
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CcInt* ccport = (CcInt*) args[1].addr;
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std::string host = cchost->GetValue();
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int port = ccport->GetValue();
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std::cout << "createSSPHandler: ValueMapping" << endl;
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std::cout << "Creating an idle handler which connects to" << endl;
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std::cout << host << ":" << port << endl << endl;
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HandlerIdle handler(host, port);
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handler.Initialize();
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result = qp->ResultStorage(s);
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CcInt* res = (CcInt*) result.addr;
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res->Set(true, 0);
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return 0;
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}
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/*
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1.3 Operation createSSPHandler operator selection array
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*/
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ValueMapping createSSPHandler[] = {
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createSSPHandler_VM
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};
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/*
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1.4 Operation createSSPHandler operator selection
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*/
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int createSSPHandler_Select(ListExpr args) {
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return 0;
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// if (listutils::isTupleStream(nl->First(args)))
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// return 0;
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// if (VTHelpers::IsVTupleStream(nl->First(args)))
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// return 1;
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// return -1;
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}
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/*
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1.5 Operation createSSPHandler operator specification
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*/
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const std::string createSSPHandlerOpSpec =
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"( ( \"Signature\" \"Syntax\" \"Meaning\" \"Example\" ) "
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"( <text>string x int -> int</text--->"
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"<text>createSSPHandler ( _, _ )</text--->"
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"<text>Creates an idle handler which waits for a role"
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" given by the coordinator</text--->"
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"<text>query createSSPHandler(\"127.0.0.1\", 54000)"
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"</text--->"
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") )";
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/*
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1.6 Operation createSSPHandler
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*/
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Operator createSSPHandler_Op(
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"createSSPHandler",
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createSSPHandlerOpSpec,
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1,
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createSSPHandler,
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createSSPHandler_Select,
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createSSPHandler_TM
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);
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} /* end of namespace */
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