def _cached(func):
func_type = _func_type(func)
@wraps(func)
def wrapper(*args, **kwargs):
# full name is stored as attribute on first call
if not hasattr(wrapper, '_full_name'):
name, _args = _func_info(func, args)
wrapper._full_name = name
# try to get the value from cache
key = get_key(wrapper._full_name, func_type, args, kwargs)
value = cache.get(key, **backend_kwargs)
# in case of cache miss recalculate the value and put it to the cache
if value is None:
value = func(*args, **kwargs)
cache.set(key, value, timeout, **backend_kwargs)
return value
def invalidate(*args, **kwargs):
''' invalidates cache result for function called with passed arguments '''
if not hasattr(wrapper, '_full_name'):
return
key = get_key(wrapper._full_name, 'function', args, kwargs)
cache.delete(key, **backend_kwargs)
wrapper.invalidate = invalidate
return wrapper
def _cached(func):
func_type = _func_type(func)
@wraps(func)
def wrapper(*args, **kwargs):
full_name(*args)
# try to get the value from cache
key = _get_key(wrapper._full_name, func_type, args, kwargs)
value = cache_backend.get(key, **backend_kwargs)
# in case of cache miss recalculate the value and put it to the cache
if value is None:
logger.debug("Cache MISS: %s" % key)
value = func(*args, **kwargs)
cache_backend.set(key, value, timeout, **backend_kwargs)
logger.debug("Cache SET: %s" % key)
else:
logger.debug("Cache HIT: %s" % key)
return value
def invalidate(*args, **kwargs):
"""
Invalidates cache result for function called with passed arguments
"""
if not hasattr(wrapper, '_full_name'):
return
key = _get_key(wrapper._full_name, 'function', args, kwargs)
cache_backend.delete(key, **backend_kwargs)
logger.debug("Cache DELETE: %s" % key)
def force_recalc(*args, **kwargs):
"""
Forces a call to the function & sets the new value in the cache
"""
full_name(*args)
key = _get_key(wrapper._full_name, func_type, args, kwargs)
value = func(*args, **kwargs)
cache_backend.set(key, value, timeout, **backend_kwargs)
return value
def full_name(*args):
# full name is stored as attribute on first call
if not hasattr(wrapper, '_full_name'):
name, _args = _func_info(func, args)
wrapper._full_name = name
def require_cache(*args, **kwargs):
"""
Only pull from cache, do not attempt to calculate
"""
full_name(*args)
key = _get_key(wrapper._full_name, func_type, args, kwargs)
logger.debug("Require cache %s" % key)
value = cache_backend.get(key, **backend_kwargs)
if not value:
logger.info("Could not find required cache %s" % key)
raise NoCachedValueException
return value
def get_cache_key(*args, **kwargs):
""" Returns name of cache key utilized """
full_name(*args)
key = _get_key(wrapper._full_name, 'function', args, kwargs)
return key
wrapper.require_cache = require_cache
wrapper.invalidate = invalidate
wrapper.force_recalc = force_recalc
wrapper.get_cache_key = get_cache_key
return wrapper
def assertFuncType(self, func, tp):
self.assertEqual(_func_type(func), tp)
def assertFuncType(self, func, tp):
self.assertEqual(_func_type(func), tp)
def _cached(func):
func_type = _func_type(func)
@wraps(func)
def wrapper(*args, **kwargs):
full_name(*args)
# try to get the value from cache
key = _get_key(wrapper._full_name, func_type, args, kwargs)
value = cache_backend.get(key, **backend_kwargs)
# in case of cache miss recalculate the value and put it to the cache
if value is None:
logger.debug("Cache MISS: %s" % key)
value = func(*args, **kwargs)
cache_backend.set(key, value, timeout, **backend_kwargs)
logger.debug("Cache SET: %s" % key)
else:
logger.debug("Cache HIT: %s" % key)
return value
def invalidate(*args, **kwargs):
"""
Invalidates cache result for function called with passed arguments
"""
full_name(*args)
if not hasattr(wrapper, '_full_name'):
return
key = _get_key(wrapper._full_name, 'function', args, kwargs)
cache_backend.delete(key, **backend_kwargs)
logger.debug("Cache DELETE: %s" % key)
def force_recalc(*args, **kwargs):
"""
Forces a call to the function & sets the new value in the cache
"""
full_name(*args)
key = _get_key(wrapper._full_name, func_type, args, kwargs)
value = func(*args, **kwargs)
cache_backend.set(key, value, timeout, **backend_kwargs)
return value
def full_name(*args):
# full name is stored as attribute on first call
if not hasattr(wrapper, '_full_name'):
name, _args = _func_info(func, args)
wrapper._full_name = name
def require_cache(*args, **kwargs):
"""
Only pull from cache, do not attempt to calculate
"""
full_name(*args)
key = _get_key(wrapper._full_name, func_type, args, kwargs)
logger.debug("Require cache %s" % key)
value = cache_backend.get(key, **backend_kwargs)
if not value:
logger.info("Could not find required cache %s" % key)
raise NoCachedValueException
return value
def get_cache_key(*args, **kwargs):
""" Returns name of cache key utilized """
full_name(*args)
key = _get_key(wrapper._full_name, 'function', args, kwargs)
return key
wrapper.require_cache = require_cache
wrapper.invalidate = invalidate
wrapper.force_recalc = force_recalc
wrapper.get_cache_key = get_cache_key
return wrapper
