128 lines
3.8 KiB
C++
128 lines
3.8 KiB
C++
/*
|
|
----
|
|
This file is part of SECONDO.
|
|
|
|
Copyright (C) 2004, University in Hagen, Department of Computer Science,
|
|
Database Systems for New Applications.
|
|
|
|
SECONDO is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
SECONDO is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with SECONDO; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
----
|
|
|
|
//paragraph [1] Title: [{\Large \bf \begin {center}] [\end {center}}]
|
|
//[TOC] [\tableofcontents]
|
|
|
|
[1] Header File of the class ~PregelAlgebra~
|
|
|
|
November 2018, J. Mende
|
|
|
|
|
|
[TOC]
|
|
|
|
1 Overview
|
|
|
|
This file contains definitions of the members of class PregelStatus
|
|
|
|
*/
|
|
|
|
#include <ListUtils.h>
|
|
#include <regex>
|
|
#include <StandardTypes.h>
|
|
#include "PregelStatus.h"
|
|
#include <boost/log/trivial.hpp>
|
|
#include "../../PregelAlgebra.h"
|
|
#include "../../../FText/FTextAlgebra.h"
|
|
#include "../../Helpers/Commander.h"
|
|
|
|
namespace pregel {
|
|
|
|
ListExpr PregelStatus::typeMapping(ListExpr args) {
|
|
if (!nl->HasLength(args, 0)) {
|
|
return listutils::typeError("You must provide no arguments.");
|
|
}
|
|
|
|
return nl->SymbolAtom(FText::BasicType());
|
|
}
|
|
|
|
int PregelStatus::valueMapping(Word *, Word &result, int,
|
|
Word &, Supplier s) {
|
|
result = qp->ResultStorage(s);
|
|
auto algebra = PregelAlgebra::getAlgebra();
|
|
|
|
std::stringstream sstream;
|
|
algebra->healthReport(sstream);
|
|
|
|
auto workers = PregelContext::get().getWorkers();
|
|
for (WorkerConfig *worker = workers();
|
|
worker != nullptr; worker = workers()) {
|
|
sstream << "+++Worker" << std::endl;
|
|
std::string query("query pregelStatus()");
|
|
|
|
std::function<std::string *(std::string &)> trimListStyle = [](
|
|
std::string &response) -> std::string * {
|
|
ListExpr res;
|
|
if(!nl->ReadFromString(response,res)){
|
|
return new std::string("error in parsing list received from worker");
|
|
}
|
|
if(!nl->HasLength(res,2)){
|
|
return new std::string("Invalid answer from worker");
|
|
}
|
|
res = nl->Second(res);
|
|
if(nl->AtomType(res)!=TextType){
|
|
return new std::string("pregel worker returns an non-text");
|
|
}
|
|
return new std::string(nl->TextValue(res));
|
|
};
|
|
|
|
std::string *response;
|
|
try {
|
|
response = Commander::remoteQuery<std::string>(worker->connection, query,
|
|
trimListStyle);
|
|
} catch (RemoteExecutionException &e) {
|
|
BOOST_LOG_TRIVIAL(error) << "Query FAILED: " << query.c_str();
|
|
((FText *) result.addr)->Set(true, "Remote Health check failed");
|
|
return 0;
|
|
}
|
|
|
|
sstream << response->c_str() << std::endl;
|
|
delete response;
|
|
}
|
|
|
|
((FText *) result.addr)->Set(true, sstream.str());
|
|
return 0;
|
|
}
|
|
|
|
OperatorSpec PregelStatus::operatorSpec(
|
|
"() -> bool",
|
|
"# ()",
|
|
"This operator queries status information about the Pregel system running "
|
|
"on the server (master) as well as all connected workers."
|
|
"This information contains the status of the messaging system "
|
|
"(clients, servers, buffers) and additionally metrics like "
|
|
"number of messages sent or time spent idling.",
|
|
"query pregelStatus();",
|
|
"This operator belongs to the Pregel API."
|
|
"It may require knowledge of the system to effectively understand and "
|
|
"use all the operators that are provided."
|
|
);
|
|
|
|
Operator PregelStatus::pregelStatus(
|
|
"pregelStatus",
|
|
PregelStatus::operatorSpec.getStr(),
|
|
PregelStatus::valueMapping,
|
|
Operator::SimpleSelect,
|
|
PregelStatus::typeMapping
|
|
);
|
|
}
|