Can ScheduledThreadPool be use to accept different type of threads?

Question

Working on the problem where I have 3 cash counters serving the number of customers. Every counter take 1 sec to process 1 item apart from third counter which takes 2 sec to process each item. (e.g. customer A with 5 items on counter one will take 5 seconds to complete), Customer B with 3 items on counter C will take 6 seconds. Every customer has different time of joining the queue. I used the ScheduledExecutorService to create number of threads equivalent to cash counters.

ScheduledExecutorService scheduledExecutorService =Executors.newScheduledThreadPool(3);

Now my runnable implementation checks the number of items and runs loops accordingly.

I am submitting the number of task depending on number of customer.

scheduledExecutorService.schedule(new Runnable(),Timetojoin, TimeUnit.SECONDS);

How do I assign different priorities to 3 threads created by executor service. As my last counter(thread) takes 2 second to process each item.

Answer 1

You will have to provide custom ThreadFactory to the ExecutorService. Your ThreadFactory will allow you to create new Threads that will suit your needs.

ScheduledThreadPoolExecutor(int corePoolSize, ThreadFactory threadFactory)

More info here, in the doc.