class TimedMessageCache(Transparent):
def __init__(self,
cacheTimeout=1 * 60 * 60,
returnCachedValueInCaseOfException=False,
backoffTimeout=None,
**kwargs):
Transparent.__init__(self, **kwargs)
self._cache = TimedDictionary(timeout=cacheTimeout)
self._returnCachedValueInCaseOfException = returnCachedValueInCaseOfException
self._backoffTimeout = backoffTimeout
self._backoffStarted = None
def clear(self):
self._cache.clear()
def setTimeout(self, timeout):
self._cache.setTimeout(timeout)
def getSize(self):
return self._cache.size()
def any_unknown(self, message, *args, **kwargs):
found = False
key = (message, repr(args), repr(kwargs))
try:
value = self._cache.peek(key)
except KeyError:
pass
else:
found = True
if not self._cache.hasExpired(key):
return value
if self._backoffStarted:
if self._backoffStarted + self._backoffTimeout < now():
self._backoffStarted = None
elif found:
return value
else:
raise BackoffException()
try:
value = yield self.any.unknown(message, *args, **kwargs)
self._cache[key] = value
except (SystemExit, KeyboardInterrupt, AssertionError):
raise
except Exception as e:
if self._backoffTimeout and isinstance(e, TimeoutException):
self._backoffStarted = now()
if not (self._returnCachedValueInCaseOfException and found):
raise BackoffException()
if not (self._returnCachedValueInCaseOfException and found):
raise
return value
yield
class TimedMessageCache(Transparent):
def __init__(self, cacheTimeout=1*60*60, returnCachedValueInCaseOfException=False, backoffTimeout=None, **kwargs):
Transparent.__init__(self, **kwargs)
self._cache = TimedDictionary(timeout=cacheTimeout)
self._returnCachedValueInCaseOfException = returnCachedValueInCaseOfException
self._backoffTimeout = backoffTimeout
self._backoffStarted = None
def clear(self):
self._cache.clear()
def setTimeout(self, timeout):
self._cache.setTimeout(timeout)
def getSize(self):
return self._cache.size()
def any_unknown(self, message, *args, **kwargs):
found = False
key = (message, repr(args), repr(kwargs))
try:
value = self._cache.peek(key)
except KeyError:
pass
else:
found = True
if not self._cache.hasExpired(key):
raise StopIteration(value)
if self._backoffStarted:
if self._backoffStarted + self._backoffTimeout < now():
self._backoffStarted = None
elif found:
raise StopIteration(value)
else:
raise BackoffException()
try:
value = yield self.any.unknown(message, *args, **kwargs)
self._cache[key] = value
except (SystemExit, KeyboardInterrupt, AssertionError):
raise
except Exception, e:
if self._backoffTimeout and isinstance(e, TimeoutException):
self._backoffStarted = now()
if not (self._returnCachedValueInCaseOfException and found):
raise BackoffException()
if not (self._returnCachedValueInCaseOfException and found):
raise
raise StopIteration(value)
yield
