def loadConfig(self):
"""
Reload the configuration object from disk if its override has changed. The
override may be changed by a different process. If that's a possibility for
your app, you may use this method to conditionally reload the config
periodically.
NOTE: the ability to detect change is based on file modification time
resolution, which was one second at the time of this writing
"""
overrideConfigPath = os.path.join(self._getConfigOverrideDir(),
self._configName)
overrideConfigChanged = False
mtime = 0
try:
mtime = os.path.getmtime(overrideConfigPath)
except OSError as e:
if e.errno != errno.ENOENT:
raise
if self._lastModTime != 0:
# Override config was there earlier but disappeared
overrideConfigChanged = True
else:
if mtime > self._lastModTime:
# Override config's modification time changed
overrideConfigChanged = True
if ((self._mode == self.MODE_LOGICAL and not self._baselineLoaded)
or overrideConfigChanged):
# Reset config cache
self._sections.clear()
self._defaults.clear()
if self._mode == self.MODE_LOGICAL:
# Load baseline config
baseConfigPath = os.path.join(self.baseConfigDir,
self._configName)
try:
with open(baseConfigPath, "r") as fileObj:
self.readfp(fileObj)
except IOError as e:
if e.errno != errno.ENOENT:
raise
raise ValueError(
"Baseline configuration object not found: %r" %
(baseConfigPath))
self._baselineLoaded = True
if overrideConfigChanged:
if mtime != 0:
# Load override config
with open(overrideConfigPath, "r") as fileObj:
with file_lock.SharedFileLock(fileObj):
self.readfp(fileObj)
self._lastModTime = mtime
def testSharedLock(self):
flock = file_lock.SharedFileLock(self._tempFileID)
# Check creation of file_lock object
self.assertEqual(type(flock), file_lock._FileLock)