Why is there no scheduled cached thread pool provided by the Java Executors class?

Question

Executors provides newCachedThreadPool() and newScheduledThreadPool(), but not newCachedScheduledThreadPool(), what gives

Answer 1

By design the ScheduledThreadPoolExecutor is a fixed size. You can use a single threaded version that submits to a normal ExecutorService for performing the task. This event thread + worker pool is fairly ease to coordinate and the flexibility makes up for the dedicated thread. I've used this in the past to replace TimerTasks and other non-critical tasks to utilize a common executor as a system-wide pool.