使用 ExecutorSERvice、Runnable 进行迭代

Question

In a service implementation following is the implementation

    if(usernames != null && usernames.size() > 0) {

        operationId = bulkUpdateAuditLogRepository.getLatestOperationId()
        for(String username: usernames) {
            executorService.submit(new BackgroundTask() {
                @Override
                public void doTask() {
                    deactivateUserInternal(username, operationId)
                }
            })
        }
    }

Also private ExecutorService executorService = Executors.newFixedThreadPool(5);

anyhow while iterating the loop only the last username of any array ['AAAAA', 'BBBB', 'CCCC'], only the value CCCC is taken up by the runnable BackgroundTask instance. Just want to know what is missing in the iteration.

Answer 1

The backgroundTask mentioned was not a java.util.concurrent.Callable, after such implementation able to get the executing in an async manner.