DCacheStorageMaker Class Reference

Inheritance diagram for DCacheStorageMaker:

Public Member Functions
virtual bool	check (const std::string &proto, const std::string &path, IOOffset *size=0)
virtual Storage *	open (const std::string &proto, const std::string &path, int mode)
virtual void	setTimeout (unsigned int timeout)
virtual void	stagein (const std::string &proto, const std::string &path)
Public Member Functions inherited from StorageMaker
	StorageMaker (void)
virtual	~StorageMaker (void)

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, IOOffset *  size = 0  )

inlinevirtual

Reimplemented from StorageMaker.

Definition at line 61 of file DCacheStorageMaker.cc.

References normalise(), and findQualityFiles::size.

  {
    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 L1TEmulatorMonitor_cff::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 Storage* DCacheStorageMaker::open ( const std::string &  proto, const std::string &  path, int  mode  )

inlinevirtual

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(), normalise(), IOFlags::OpenUnbuffered, StorageFactory::READ_HINT_UNBUFFERED, StorageFactory::readHint(), and StorageFactory::wrapNonLocalFile().

  {
    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;

    Storage *file = new DCacheFile(normalise(proto, path), mode);
    return f->wrapNonLocalFile(file, proto, std::string(), mode);
  }

virtual void DCacheStorageMaker::setTimeout ( unsigned int  timeout )

inlinevirtual

Reimplemented from StorageMaker.

Definition at line 81 of file DCacheStorageMaker.cc.

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

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

inlinevirtual

Reimplemented from StorageMaker.

Definition at line 50 of file DCacheStorageMaker.cc.

References edm::hlt::Exception, and normalise().

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