DCacheStorageMaker Class Reference

Inheritance diagram for DCacheStorageMaker:

Public Member Functions
virtual bool	check (const std::string &proto, const std::string &path, const AuxSettings &aux, IOOffset *size=0) const override
virtual std::unique_ptr< Storage >	open (const std::string &proto, const std::string &path, int mode, AuxSettings const &aux) const override
virtual void	stagein (const std::string &proto, const std::string &path, const AuxSettings &aux) const override
Public Member Functions inherited from StorageMaker
	StorageMaker ()=default
virtual	~StorageMaker ()=default

Private Member Functions
void	setTimeout (unsigned int timeout) const

Static Private Member Functions
static std::string	normalise (const std::string &proto, const std::string &path)

Detailed Description

Definition at line 9 of file DCacheStorageMaker.cc.

Member Function Documentation

virtual bool DCacheStorageMaker::check ( const std::string &  proto, const std::string &  path, const AuxSettings &  aux, IOOffset *  size = 0  ) const

inlineoverridevirtual

Reimplemented from StorageMaker.

Definition at line 68 of file DCacheStorageMaker.cc.

References normalise(), setTimeout(), findQualityFiles::size, AlCaHLTBitMon_QueryRunRegistry::string, and StorageMaker::AuxSettings::timeout.

  {
    setTimeout(aux.timeout);
    std::string testpath (normalise (proto, path));
    if (dc_access (testpath.c_str (), R_OK) != 0)
      return false;

    if (size)
    {
      struct stat64 buf;
      if (dc_stat64 (testpath.c_str (), &buf) != 0)
        return false;
    
      *size = buf.st_size;
    }

    return true;
  }

static std::string DCacheStorageMaker::normalise ( const std::string &  proto, const std::string &  path  )

inlinestaticprivate

Return appropriate path for use with dcap library. If the path is in the URL form ([gsi]dcap://host:port/path), return the full URL as it is. If the path is /pnfs form (dcap:/pnfs/path), return only the path part, unless the protocol is 'gsidcap', in which case return the whole thing.

Definition at line 15 of file DCacheStorageMaker.cc.

References AlCaHLTBitMon_ParallelJobs::p.

Referenced by check(), open(), and stagein().

  {
    size_t p = path.find("/pnfs");
    if (p < 3)
      return (proto == "gsidcap") ? proto + ':' + path.substr(p) : path.substr(p);

    // remove multiple "/"
    p = path.find_first_not_of('/');

    // it's url, return the full thing
    return proto + "://" + path.substr(p);
  }

virtual std::unique_ptr<Storage> DCacheStorageMaker::open ( const std::string &  proto, const std::string &  path, int  mode, AuxSettings const &  aux  ) const

inlineoverridevirtual

Open a storage object for the given URL (protocol + path), using the mode bits. No temporary files are downloaded.

Implements StorageMaker.

Definition at line 32 of file DCacheStorageMaker.cc.

References StorageFactory::CACHE_HINT_STORAGE, StorageFactory::cacheHint(), f, mergeVDriftHistosByStation::file, StorageFactory::get(), alignBH_cfg::mode, normalise(), IOFlags::OpenUnbuffered, StorageFactory::READ_HINT_UNBUFFERED, StorageFactory::readHint(), setTimeout(), AlCaHLTBitMon_QueryRunRegistry::string, StorageMaker::AuxSettings::timeout, and StorageFactory::wrapNonLocalFile().

  {
    setTimeout(aux.timeout);
    const StorageFactory *f = StorageFactory::get();
    StorageFactory::ReadHint readHint = f->readHint();
    StorageFactory::CacheHint cacheHint = f->cacheHint();

    if (readHint != StorageFactory::READ_HINT_UNBUFFERED
    || cacheHint == StorageFactory::CACHE_HINT_STORAGE)
      mode &= ~IOFlags::OpenUnbuffered;
    else
      mode |= IOFlags::OpenUnbuffered;

    auto file = std::make_unique<DCacheFile>(normalise(proto, path), mode);
    return f->wrapNonLocalFile(std::move(file), proto, std::string(), mode);
  }

void DCacheStorageMaker::setTimeout ( unsigned int  timeout ) const

inlineprivate

Definition at line 92 of file DCacheStorageMaker.cc.

Referenced by check(), open(), and stagein().

                                              {
    if (timeout != 0) dc_setOpenTimeout(timeout);
  }

virtual void DCacheStorageMaker::stagein ( const std::string &  proto, const std::string &  path, const AuxSettings &  aux  ) const

inlineoverridevirtual

Reimplemented from StorageMaker.

Definition at line 52 of file DCacheStorageMaker.cc.

References cms::Exception::addContext(), normalise(), setTimeout(), AlCaHLTBitMon_QueryRunRegistry::string, and StorageMaker::AuxSettings::timeout.

  {
    setTimeout(aux.timeout);
    std::string npath = normalise(proto, path);
    if (dc_stage(npath.c_str(), 0, 0) != 0) {
      cms::Exception ex("FileStageInError");
      ex << "Cannot stage in file '" << npath
     << "', error was: " << dc_strerror(dc_errno)
     << " (dc_errno=" << dc_errno << ")";
      ex.addContext("Calling DCacheStorageMaker::stagein()");
      throw ex;
    }
  }