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Add a wrapper around cache.get to be able to force re-run #59

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Add a wrapper around cache.get to be able to force re-run #59

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ce07f2a
refs #59 add wrapper around `cache.get()`
bocribbz Apr 27, 2016
c8414f5
make `_get_cache_value` a class method
bocribbz Apr 27, 2016
28bca90
refs #59 flake8
bocribbz Apr 27, 2016
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18 changes: 16 additions & 2 deletions jobtastic/task.py
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Original file line number Diff line number Diff line change
Expand Up @@ -230,7 +230,7 @@ def apply_async(self, args, kwargs, **options):
cache_key = self._get_cache_key(**kwargs)

# Check for an already-computed and cached result
task_id = cache.get(cache_key) # Check for the cached result
task_id = self._get_cache_value(key=cache_key)
if task_id:
# We've already built this result, just latch on to the task that
# did the work
Expand All @@ -239,7 +239,7 @@ def apply_async(self, args, kwargs, **options):
return self.AsyncResult(task_id)

# Check for an in-progress equivalent task to avoid duplicating work
task_id = cache.get('herd:%s' % cache_key)
task_id = self._get_cache_value(key=cache_key, prefix='herd')
if task_id:
logging.info('Found existing in-progress task: %s', task_id)
return self.AsyncResult(task_id)
Expand Down Expand Up @@ -448,6 +448,20 @@ def _get_cache_key(self, **kwargs):
cache_prefix = '%s.%s' % (self.__module__, self.__name__)
return '%s:%s' % (cache_prefix, m.hexdigest())

@classmethod
def _get_cache_value(self, key, prefix=None):
"""
Wrapper around ``cache.get()``.
Use this if you want to bust cache in some scenarios.
"""
if prefix is not None:
key = "{prefix}:{key}".format(
prefix=prefix,
key=key,
)

return cache.get(key)

def _get_memory_usage(self):
current_process = psutil.Process(os.getpid())
usage = current_process.memory_info()
Expand Down