Drummer - library to schedule, manage and invoke jobs (i.e. tasks, deamons,timers).
Provides self-documented and easy expressions to schedule jobs just by one annotation or simple property.
Understands commonly known Cron expressions.
Since Drummer work on annotations or properties... your code remains totally untouchable.
Unusual execution is not a problem since Drummer is designed to work with combined multiple triggers.
Asyncronous multhreating execution on cached thread pools never been so easy.
Drummer is integrated with Spring Beans, CDI Java EE beans or pure Java by default.