117 lines
3.0 KiB
C++
117 lines
3.0 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) 2019,
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University in Hagen,
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Faculty of Mathematics and 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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//[TOC] [\tableofcontents]
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[1] Header File of the class ~PregelAlgebra~
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[TOC]
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1 Overview
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This file contains definitions of the members of class ClearMessages
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*/
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#include <ListUtils.h>
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#include <StandardTypes.h>
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#include "ClearMessages.h"
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#include "../../PregelAlgebra.h"
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#include "../../MessageBroker/MessageBroker.h"
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#include "../OnMaster/QueryRunner.h"
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namespace pregel {
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ListExpr ClearMessages::typeMapping(ListExpr args) {
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if(!nl->IsEmpty(args)){
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return listutils::typeError("No argument expected");
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}
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return listutils::basicSymbol<CcBool>();
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}
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int ClearMessages::valueMapping(Word*, Word &result, int message,
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Word & local, Supplier s) {
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bool r = true;
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result = qp->ResultStorage(s);
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MessageBroker::get().clearMessages(); // clear local messages
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// when master => class clearPregelMessages on all connected workers
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if(PregelAlgebra::getAlgebra()->amITheMaster()){
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// cout << "On Master => class clearPregelMessages to all workers" << endl;
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const std::string query = "query clearPregelMessages()";
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const supplier<pregel::WorkerConfig> &workers =
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PregelContext::get().getWorkers();
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std::function<std::string *(std::string &)> mapper =
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[](std::string &result) {
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return new std::string(result);
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};
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std::vector<QueryRunner*> runners;
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for (auto worker = workers(); worker != nullptr; worker = workers()) {
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WorkerConnection* w = worker->connection;
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if(w){
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runners.push_back(new QueryRunner(w,query));
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}
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}
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for(QueryRunner* qr : runners){
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if(!qr->successful()){
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r = false;
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}
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delete qr;
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}
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}
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CcBool* res = (CcBool*) result.addr;
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res->Set(true,r);
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return 0;
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}
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OperatorSpec ClearMessages::operatorSpec(
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" -> bool",
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"_ ()",
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"Removes all queued messages.",
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"query clearPregelMessages();"
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);
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Operator ClearMessages::clearMessages(
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"clearPregelMessages",
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ClearMessages::operatorSpec.getStr(),
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ClearMessages::valueMapping,
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Operator::SimpleSelect,
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ClearMessages::typeMapping
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);
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}
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