def close(self):
"""Emulate local method of same name"""
if self.locking != LOCK_UN:
self.unlock()
self.__close_remote_file(self.path)
# Again we need parent method to manipulate read-only attributes
ServerFile.close(self)
def __init__(
self,
path,
mode='r',
bufsize=-1,
):
"""Setup DistFile object"""
# Make sure we don't run into trouble if server doesn't recognize
# that /test//file/ is equivalent to /test/file
path = _normpath(path)
# Some of the file attributes inherited from file are
# read-only (mode, closed, ...) so we must call parent
# constructor to set them. However, we don't want to
# create actual local file so we use a dummy.
ServerFile.__init__(self, _devnull, mode, bufsize)
self.providers = []
# semi random session id for now - we should use cert access
# instead!
self.session_id = BASE_ID
self.session_home = BASE_HOME
self.session_type = None
self.path = path
self.bufsize = bufsize
self.offset = 0
self.locking = LOCK_UN
(status, data) = self.__open_remote_file(path, mode)
if status == 0:
self.providers = data.split()
else:
# TODO: Dist FS always sets exclusive access on open for
# now
raise IOError('Distfile: init failed with error %s: %s' %
(status, data))
if mode.startswith('w'):
# Mimic standard python behaviour of truncating files
# opened in write mode. Use "r+" to avoid truncating!
self.__truncate_remote_file(self.providers, path, 0)
