question: public void init ( ) { _tokenMgmtExecutor . scheduleWithFixedDelay ( new ExpiredTokenCleaner ( ) , 1 , _maxLifeValuesHolder . getMaxTokenIdleTimeInMins ( ) , TimeUnit . MINUTES ) ; _tokenMgmtExecutor . scheduleWithFixedDelay ( new TokenKeysUpdater ( ) , 1 , FOREIGN_TOKEN_KEYS_BUNDLE_REFRESH_RATE_IN_MINS , TimeUnit . MINUTES ) ; }
target:  initializer, startup the background expired token deletion thread and key updater thread (no op unless multi vdc)