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StormLcgGtStorageMaker Class Reference

Inheritance diagram for StormLcgGtStorageMaker:

List of all members.

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 &surl, int mode, const std::string &tmpdir)
Private Member Functions
std::string	getTURL (const std::string &surl)

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Detailed Description

Definition at line 11 of file StormLCGStorageMaker.cc.

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Member Function Documentation

virtual bool StormLcgGtStorageMaker::check	(	const std::string &	proto,
		const std::string &	path,
		IOOffset *	size = 0
	)			[inline, virtual]

Reimplemented from StorageMaker.

Definition at line 75 of file StormLCGStorageMaker.cc.

References getTURL(), and size.

  {
    struct stat st;
    if (stat (getTURL(path).c_str(), &st) != 0)
      return false;

    if (size)
      *size = st.st_size;

    return true;
  }

std::string StormLcgGtStorageMaker::getTURL

(

const std::string &

surl

)

[inline, private]

Definition at line 14 of file StormLCGStorageMaker.cc.

References lat::endl(), Exception, LogDebug, output(), p, and lhef::timeout().

Referenced by check(), and open().

  {
    // PrepareToGet timeout  
    std::string timeout("300");
    if(char *p = getenv("CMS_STORM_LCG_GT_TIMEOUT"))
      timeout = p;

    /* Build the command line:
        -b => no BDII contacted
        -T srmv2 => necessary with -b 
        -t timeout */
    std::string comm("lcg-gt -b -T srmv2 -t " + timeout + " srm:" + surl + " file 2>&1"); 
    LogDebug("StormLCGStorageMaker") << "command: " << comm << std::endl;

    FILE *pipe = popen(comm.c_str(), "r");
    if(! pipe)
      throw cms::Exception("StormLCGStorageMaker")
        << "failed to execute lcg-gt command: "
        << comm;

    // Get output
    int ch;
    std::string output;
    while ((ch = getc(pipe)) != EOF)
      output.push_back(ch);
    pclose(pipe);

    LogDebug("StormLCGStorageMaker") << "output: " << output << std::endl;
 
    // Extract TURL if possible.
    size_t start = output.find("file:", 0);
    if (start == std::string::npos)
      throw cms::Exception("StormLCGStorageMaker")
        << "no turl found in command '" << comm << "' output:\n" << output;

    start += 5;
    std::string turl(output, start, output.find_first_of("\n", start) - start); 
    LogDebug("StormLCGStorageMaker") << "file to open: " << turl << std::endl;
    return turl;
  }

virtual Storage* StormLcgGtStorageMaker::open	(	const std::string &	proto,
		const std::string &	surl,
		int	mode,
		const std::string &	tmpdir
	)			[inline, virtual]

Implements StorageMaker.

Definition at line 57 of file StormLCGStorageMaker.cc.

References StorageFactory::CACHE_HINT_STORAGE, StorageFactory::cacheHint(), f, StorageFactory::get(), getTURL(), IOFlags::OpenUnbuffered, StorageFactory::READ_HINT_UNBUFFERED, and StorageFactory::readHint().

  {
    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;

    return new File (getTURL(surl), mode); 
  }

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The documentation for this class was generated from the following file:

• Utilities/StorageFactory/plugins/StormLCGStorageMaker.cc

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