std::vector<std::string> SimpleFileStore::versions(const std::string& name, bool inprogress/*=false*/) const
{
std::vector<std::string> versions;
FilePaths paths = filepath(name);
if ( File::exists(paths.current()) )
versions.push_back( lookupVersion(paths.current()).toString() );
if ( File::exists(paths.deleted()) )
versions.push_back( lookupVersion(paths.deleted(), true).toString() );
if ( inprogress && File::exists(paths.inprogress()) )
versions.push_back( lookupVersion(paths.inprogress()).toString() );
return versions;
}
bool SimpleFileStore::remove(const std::string& name)
{
FilePaths fps = filepath(name);
bool success = File::remove(fps.inprogress()) | File::remove(fps.deleted()) | File::remove(fps.current());
boost::filesystem::path path = fps.current();
path = path.parent_path();
while (File::remove(path.string()))
path = path.parent_path();
return success;
}
bool SimpleFileStore::onWriteComplete(const std::string& name, KeyMetadata& md)
{
if (md.version.isDeleted())
return onDeleteComplete(name, md);
FilePaths paths = filepath(name);
if ( !testIfVersionGreater(md.version, paths.deleted()) )
{
File::remove(paths.inprogress());
return false;
}
File::rename(paths.current(), paths.reserve());
if ( !File::set_modified_time(paths.inprogress(), timeFromVersion(md.version)) || !File::rename(paths.inprogress(), paths.current()) )
{
File::rename(paths.reserve(), paths.current());
File::remove(paths.inprogress());
return false;
}
md.digest ^= removeIfExists(paths.reserve());
md.digest ^= removeIfExists(paths.deleted(), true);
return true;
}
readstream SimpleFileStore::read(const std::string& name, const std::string& version, bool inprogress/*=false*/) const
{
// can't read inprogress versions, because I don't want to think about it.
FilePaths paths = filepath(name);
KeyMetadata md;
if (!version.empty())
{
md.version.fromString(version);
if (md.version.compare(mergedVersion(name)) != VectorClock::EQUAL)
return readstream();
}
else
md.version = mergedVersion(name);
string filename = md.version.isDeleted()? paths.deleted() : paths.current();
FileReader* reader = new FileReader(filename);
if (name.find(MEMBERSHIP_FILE_PREFIX) == 0)
md.totalCopies = 0;
return readstream(reader, md);
}