Elements  5.8
A C++ base framework for the Euclid Software.
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DataSynchronizer.cpp
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1 /*
2  * Copyright (C) 2012-2020 Euclid Science Ground Segment
3  *
4  * This library is free software; you can redistribute it and/or modify it under
5  * the terms of the GNU Lesser General Public License as published by the Free
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12  * details.
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14  * You should have received a copy of the GNU Lesser General Public License
15  * along with this library; if not, write to the Free Software Foundation, Inc.,
16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include <string>
20 #include "ElementsKernel/Unused.h"
21 
24 
25 namespace ElementsServices {
26 namespace DataSync {
27 
29  const ConnectionConfiguration& connection,
30  const DependencyConfiguration& dependency) :
31  m_connection(connection), m_fileMap(dependency.fileMap()) {
32 }
33 
35  for (const auto& item : m_fileMap) {
36  const auto& localFile = item.first;
37  const auto& distantFile = item.second;
38  if (fileShouldBeWritten(localFile)) {
39  downloadOneFile(distantFile, localFile);
40  }
41  }
42 }
43 
45  if (not fileAlreadyExists(localFile)) {
46  return true;
47  }
49 }
50 
52  return boost::filesystem::is_regular_file(localFile);
53 }
54 
56  path distantFile,
57  path localFile) const {
58  std::string command = createDownloadCommand(distantFile, localFile);
59  createLocalDirOf(localFile);
60  const auto outErr = runCommandAndCaptureOutErr(command);
61  if (not hasBeenDownloaded(distantFile, localFile)) {
62  throw DownloadFailed(distantFile, localFile);
63  }
64 }
65 
67  ELEMENTS_UNUSED path distantFile,
68  path localFile) const {
69  if (not boost::filesystem::is_regular_file(localFile)) {
70  return false;
71  }
72  return boost::filesystem::file_size(localFile) > 0;
73 }
74 
75 } // namespace DataSync
76 } // namespace ElementsServices
The dependency configurations holds, for each test file to be retrieved:
ELEMENTS_API void createLocalDirOf(path localFile)
Macro to silence unused variables warnings from the compiler.
bool overwritingAllowed() const
Check whether existing local files can be overwritten.
bool fileShouldBeWritten(path localFile) const
STL class.
virtual std::string createDownloadCommand(path distantFile, path localFile) const =0
ELEMENTS_API std::pair< std::string, std::string > runCommandAndCaptureOutErr(std::string command)
bool hasBeenDownloaded(path distantFile, path localFile) const
boost::filesystem::path path
Definition: DataSyncUtils.h:33
An exception raised when downloading fails.
The connection configuration mainly holds:
DataSynchronizer(const ConnectionConfiguration &connection, const DependencyConfiguration &dependency)
#define ELEMENTS_UNUSED
Definition: Unused.h:39
void downloadOneFile(path distantFile, path localFile) const