128 lines
3.8 KiB
C++
128 lines
3.8 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) 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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//[TOC] [\tableofcontents]
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[1] Header File of the class ~PregelAlgebra~
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November 2018, J. Mende
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[TOC]
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1 Overview
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This file contains definitions of the members of class PregelStatus
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*/
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#include <ListUtils.h>
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#include <regex>
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#include <StandardTypes.h>
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#include "PregelStatus.h"
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#include <boost/log/trivial.hpp>
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#include "../../PregelAlgebra.h"
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#include "../../../FText/FTextAlgebra.h"
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#include "../../Helpers/Commander.h"
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namespace pregel {
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ListExpr PregelStatus::typeMapping(ListExpr args) {
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if (!nl->HasLength(args, 0)) {
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return listutils::typeError("You must provide no arguments.");
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}
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return nl->SymbolAtom(FText::BasicType());
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}
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int PregelStatus::valueMapping(Word *, Word &result, int,
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Word &, Supplier s) {
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result = qp->ResultStorage(s);
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auto algebra = PregelAlgebra::getAlgebra();
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std::stringstream sstream;
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algebra->healthReport(sstream);
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auto workers = PregelContext::get().getWorkers();
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for (WorkerConfig *worker = workers();
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worker != nullptr; worker = workers()) {
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sstream << "+++Worker" << std::endl;
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std::string query("query pregelStatus()");
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std::function<std::string *(std::string &)> trimListStyle = [](
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std::string &response) -> std::string * {
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ListExpr res;
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if(!nl->ReadFromString(response,res)){
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return new std::string("error in parsing list received from worker");
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}
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if(!nl->HasLength(res,2)){
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return new std::string("Invalid answer from worker");
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}
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res = nl->Second(res);
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if(nl->AtomType(res)!=TextType){
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return new std::string("pregel worker returns an non-text");
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}
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return new std::string(nl->TextValue(res));
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};
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std::string *response;
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try {
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response = Commander::remoteQuery<std::string>(worker->connection, query,
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trimListStyle);
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} catch (RemoteExecutionException &e) {
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BOOST_LOG_TRIVIAL(error) << "Query FAILED: " << query.c_str();
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((FText *) result.addr)->Set(true, "Remote Health check failed");
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return 0;
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}
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sstream << response->c_str() << std::endl;
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delete response;
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}
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((FText *) result.addr)->Set(true, sstream.str());
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return 0;
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}
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OperatorSpec PregelStatus::operatorSpec(
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"() -> bool",
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"# ()",
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"This operator queries status information about the Pregel system running "
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"on the server (master) as well as all connected workers."
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"This information contains the status of the messaging system "
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"(clients, servers, buffers) and additionally metrics like "
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"number of messages sent or time spent idling.",
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"query pregelStatus();",
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"This operator belongs to the Pregel API."
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"It may require knowledge of the system to effectively understand and "
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"use all the operators that are provided."
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);
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Operator PregelStatus::pregelStatus(
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"pregelStatus",
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PregelStatus::operatorSpec.getStr(),
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PregelStatus::valueMapping,
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Operator::SimpleSelect,
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PregelStatus::typeMapping
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);
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}
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