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LocalStorageMaker.cc

Go to the documentation of this file.

#include "Utilities/StorageFactory/interface/StorageMaker.h"
#include "Utilities/StorageFactory/interface/StorageMakerFactory.h"
#include "Utilities/StorageFactory/interface/StorageFactory.h"
#include "Utilities/StorageFactory/interface/File.h"
#include <unistd.h>
#include <sys/stat.h>

class LocalStorageMaker : public StorageMaker
{
public:
  virtual Storage *open (const std::string &proto,
                         const std::string &path,
                         int mode,
                         const std::string &tmpdir)
  {
    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 (path, mode); 
  }

  virtual bool check (const std::string &proto,
                      const std::string &path,
                      IOOffset *size = 0)
  {
    struct stat st;
    if (stat (path.c_str(), &st) != 0)
      return false;

    if (size)
      *size = st.st_size;

    return true;
  }
};

DEFINE_EDM_PLUGIN (StorageMakerFactory, LocalStorageMaker, "file");

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