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Information Service (AliceO2Group#6)
InformationService to broadcast list of tasks and their objects Add an information service that collects the list of objects published by all the tasks and make it available to clients. There are 2 binaries : qcInfoService and qcInfoServiceDump. The latter is to check what is being produced by the Information Service. The information service can use a file as input if there are no tasks running but one wants to simulate a normal use. QC-57
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| Original file line number | Diff line number | Diff line change |
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| // Copyright CERN and copyright holders of ALICE O2. This software is | ||
| // distributed under the terms of the GNU General Public License v3 (GPL | ||
| // Version 3), copied verbatim in the file "COPYING". | ||
| // | ||
| // See http://alice-o2.web.cern.ch/license for full licensing information. | ||
| // | ||
| // In applying this license CERN does not waive the privileges and immunities | ||
| // granted to it by virtue of its status as an Intergovernmental Organization | ||
| // or submit itself to any jurisdiction. | ||
| // | ||
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| /// | ||
| /// \author bvonhall | ||
| /// \file InformationService.cxx | ||
| /// | ||
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| #include "InformationService.h" | ||
| #include "QualityControl/QcInfoLogger.h" | ||
| #include <options/FairMQProgOptions.h> | ||
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| using namespace std; | ||
| typedef boost::tokenizer<boost::char_separator<char> > t_tokenizer; | ||
| using namespace o2::quality_control::core; | ||
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| int timeOutIntervals = 5; // in seconds | ||
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| InformationService::InformationService() : th(nullptr), mFakeDataIndex(0) | ||
| { | ||
| OnData("tasks_input", &InformationService::handleTaskInputData); | ||
| OnData("request_data", &InformationService::handleRequestData); | ||
| } | ||
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| void InformationService::Init() | ||
| { | ||
| string fakeDataFile = fConfig->GetValue<string>("fake-data-file"); | ||
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| // todo put this in a method | ||
| if (fakeDataFile != "") { | ||
| readFakeDataFile(fakeDataFile); | ||
| } | ||
| } | ||
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| InformationService::~InformationService() | ||
| { | ||
| } | ||
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| void InformationService::checkTimedOut() | ||
| { | ||
| string line = mFakeData[mFakeDataIndex % mFakeData.size()]; | ||
| handleTaskInputData(line); | ||
| mFakeDataIndex++; | ||
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| // restart timer | ||
| mTimer->expires_at(mTimer->expires_at() + boost::posix_time::seconds(timeOutIntervals)); | ||
| mTimer->async_wait(boost::bind(&InformationService::checkTimedOut, this)); | ||
| } | ||
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| bool InformationService::handleRequestData(FairMQMessagePtr &request, int /*index*/) | ||
| { | ||
| string requestParam = string(static_cast<char *>(request->GetData()), request->GetSize()); | ||
| LOG(INFO) << "Received request from client: \"" << requestParam << "\""; | ||
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| string *result = nullptr; | ||
| if (requestParam == "all") { | ||
| result = new string(produceJsonAll()); | ||
| } else { | ||
| if (mCacheTasksData.count(requestParam) > 0) { | ||
| result = new string(produceJson(requestParam)); | ||
| } else { | ||
| result = new string("{\"error\": \"no such task\"}"); | ||
| } | ||
| } | ||
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| LOG(INFO) << "Sending reply to client."; | ||
| FairMQMessagePtr reply(NewMessage(const_cast<char *>(result->c_str()), // data | ||
| result->length(), // size | ||
| [](void * /*data*/, | ||
| void *object) { delete static_cast<string *>(object); }, // deletion callback | ||
| result)); // object that manages the data | ||
| if (Send(reply, "request_data") <= 0) { | ||
| LOG(ERROR) << "error sending reply"; | ||
| } | ||
| return true; // keep running | ||
| } | ||
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| bool InformationService::handleTaskInputData(FairMQMessagePtr &msg, int /*index*/) | ||
| { | ||
| string *receivedData = new std::string(static_cast<char *>(msg->GetData()), msg->GetSize()); | ||
| LOG(INFO) << "Received data, processing..."; | ||
| LOG(INFO) << " " << *receivedData; | ||
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| handleTaskInputData(*receivedData); | ||
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| return true; // keep running | ||
| } | ||
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| bool InformationService::handleTaskInputData(std::string receivedData) | ||
| { | ||
| std::string taskName = getTaskName(&receivedData); | ||
| LOG(DEBUG) << "task : " << taskName; | ||
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| // check if new data | ||
| boost::hash<std::string> string_hash; | ||
| size_t hash = string_hash(receivedData); | ||
| if (mCacheTasksObjectsHash.count(taskName) > 0) { | ||
| if (mCacheTasksObjectsHash.count(taskName) > 0 && hash == mCacheTasksObjectsHash[taskName]) { | ||
| LOG(INFO) << "Data already known, we skip it"; | ||
| return true; | ||
| } | ||
| } | ||
| mCacheTasksObjectsHash[taskName] = hash; | ||
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| // parse | ||
| vector<string> objects = getObjects(&receivedData); | ||
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| // store | ||
| mCacheTasksData[taskName] = objects; | ||
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| // json | ||
| string *json = new std::string(produceJson(taskName)); | ||
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| // publish | ||
| sendJson(json); | ||
| } | ||
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| void InformationService::readFakeDataFile(std::string fakeDataFile) | ||
| { | ||
| std::string line; | ||
| std::ifstream myfile(fakeDataFile); | ||
| if (!myfile) //Always test the file open. | ||
| { | ||
| LOG(ERROR) << "Error opening fake data file"; | ||
| return; | ||
| } | ||
| mFakeData.clear(); | ||
| while (std::getline(myfile, line)) { | ||
| mFakeData.push_back(line); | ||
| } | ||
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| // start a timer to use the fake data | ||
| mTimer = new boost::asio::deadline_timer(io, boost::posix_time::seconds(timeOutIntervals)); | ||
| mTimer->async_wait(boost::bind(&InformationService::checkTimedOut, this)); | ||
| th = new thread([&] { io.run(); }); | ||
| } | ||
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| vector<string> InformationService::getObjects(string *receivedData) | ||
| { | ||
| vector<string> objects; | ||
| std::string objectsString = receivedData->substr(receivedData->find(":") + 1, receivedData->length()); | ||
| LOG(DEBUG) << "objects : " << objectsString; | ||
| boost::char_separator<char> sep(","); | ||
| t_tokenizer tok(objectsString, sep); | ||
| for (t_tokenizer::iterator beg = tok.begin(); beg != tok.end(); ++beg) { | ||
| objects.push_back(*beg); | ||
| } | ||
| return objects; | ||
| } | ||
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| std::string InformationService::getTaskName(std::string *receivedData) | ||
| { | ||
| return receivedData->substr(0, receivedData->find(":")); | ||
| } | ||
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| pt::ptree InformationService::buildTaskNode(std::string taskName) | ||
| { | ||
| pt::ptree task_node; | ||
| task_node.put("name", taskName); | ||
| pt::ptree objects_node; | ||
| for (auto &object : mCacheTasksData[taskName]) { | ||
| pt::ptree object_node; | ||
| object_node.put("id", object); | ||
| objects_node.push_back(std::make_pair("", object_node)); | ||
| } | ||
| task_node.add_child("objects", objects_node); | ||
| return task_node; | ||
| } | ||
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| std::string InformationService::produceJson(std::string taskName) | ||
| { | ||
| pt::ptree taskNode = buildTaskNode(taskName); | ||
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| std::stringstream ss; | ||
| pt::json_parser::write_json(ss, taskNode); | ||
| LOG(DEBUG) << "json : " << endl << ss.str(); | ||
| // QcInfoLogger::GetInstance() << infologger::Debug << "json : \n" << *json << infologger::endm; | ||
| return ss.str(); | ||
| } | ||
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| std::string InformationService::produceJsonAll() | ||
| { | ||
| string result; | ||
| pt::ptree main_node; | ||
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| pt::ptree tasksListNode; | ||
| for (const auto &taskTuple : mCacheTasksData) { | ||
| pt::ptree taskNode = buildTaskNode(taskTuple.first); | ||
| tasksListNode.push_back(std::make_pair("", taskNode)); | ||
| } | ||
| main_node.add_child("tasks", tasksListNode); | ||
|
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| std::stringstream ss; | ||
| pt::json_parser::write_json(ss, main_node); | ||
| LOG(DEBUG) << "json : " << endl << ss.str(); | ||
| return ss.str(); | ||
| } | ||
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| void InformationService::sendJson(std::string *json) | ||
| { | ||
| FairMQMessagePtr msg2(NewMessage(const_cast<char *>(json->c_str()), | ||
| json->length(), | ||
| [](void * /*data*/, void *object) { delete static_cast<string *>(object); }, | ||
| json)); | ||
| int ret = Send(msg2, "updates_output"); | ||
| if (ret < 0) { | ||
| LOG(ERROR) << "Error sending update"; | ||
| } | ||
| } |
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