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FileProducer.cxx
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61 lines (51 loc) · 2.12 KB
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// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// 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.
///
/// \file FileProducer.cxx
/// \author julian.myrcha@cern.ch
#include "EventVisualisationBase/DirectoryLoader.h"
#include "EveWorkflow/FileProducer.h"
#include "CommonUtils/FileSystemUtils.h"
#include <deque>
#include <chrono>
#include <filesystem>
#include <algorithm>
#include <climits>
#include <fmt/core.h>
using namespace o2::event_visualisation;
using std::chrono::duration_cast;
using std::chrono::milliseconds;
using std::chrono::system_clock;
FileProducer::FileProducer(const std::string& path, const std::string& ext, const std::string& name)
{
this->mPath = path;
this->mName = name;
this->mExt = ext;
o2::utils::createDirectoriesIfAbsent(path); // create a folder if not exists (fails if no rights)
}
void FileProducer::reduceNumberOfFiles(size_t filesInFolder) const
{
const std::vector<std::string> ext = {".json", ".root", ".eve"};
DirectoryLoader::reduceNumberOfFiles(this->mPath, DirectoryLoader::load(this->mPath, "_", ext), filesInFolder);
}
std::string FileProducer::newFileName() const
{
const auto millisec_since_epoch = duration_cast<milliseconds>(system_clock::now().time_since_epoch()).count();
char hostname[_POSIX_HOST_NAME_MAX];
gethostname(hostname, _POSIX_HOST_NAME_MAX);
const auto pid = getpid();
const auto result = fmt::format(fmt::runtime(this->mName),
fmt::arg("hostname", hostname),
fmt::arg("pid", pid),
fmt::arg("timestamp", millisec_since_epoch),
fmt::arg("ext", this->mExt));
return this->mPath + "/" + result;
}