RSSCache

mod:: RSSCache

Extension of DictCache to be used within RSS

class DIRAC.ResourceStatusSystem.Utilities.RSSCache.RSSCache(lifeTime, updateFunc=None, cacheHistoryLifeTime=None)

Bases: object

Cache with purgeThread integrated

__init__(lifeTime, updateFunc=None, cacheHistoryLifeTime=None): Constructor

acquireLock(): Acquires RSSCache lock

get(resourceKey)

Gets the resource(s) status(es). Every resource can have multiple statuses, so in order to speed up things, we store them on the cache as follows:

{ (<resourceName>,<resourceStatusType0>) : whatever0,
  (<resourceName>,<resourceStatusType1>) : whatever1,
}

getBulk(resourceKeys): Gets values for resourceKeys in one ATOMIC operation.

getCacheHistory(): Return the cache updates history

getCacheKeys(): List all the keys stored in the cache.

getCacheStatus(): Return the latest cache status

isCacheAlive(): Returns status of the cache refreshing thread

refreshCache(): Clears the cache and gets its latest version, not Thread safe ! Acquire a lock before using it ! ( and release it afterwards ! )

refreshCacheAndHistory(): Method that refreshes the cache and updates the history. Not thread safe, you must acquire a lock before using it, and release it right after !

releaseLock(): Releases RSSCache lock

resetCache(): Reset cache.

setCacheHistoryLifeTime(cacheHistoryLifeTime): Set cache life time

setLifeTime(lifeTime): Set cache life time

startRefreshThread(): Run refresh thread.

stopRefreshThread(): Stop refresh thread.