August 2011
Intermediate to advanced
280 pages
6h 50m
English
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Managing Threads with ExecutorService
To find the directory size, we could split the operation into parts, with each task exploring a subdirectory. Since each task has to run in a separate thread, we could start an instance of Thread. But threads are not reusable—we can’t restart them, and scheduling multiple tasks on them is not easy. We certainly don’t want to create as many threads as the number of subdirectories we find—it’s not scalable and is the quickest way to fail. The java.util.concurrent API was introduced exactly for this purpose—to manage a pool of threads.
We met the ExecutorService and the different types of executors in Concurrent Computation of Net Asset Value. The ExecutorService, the Executors factory, and the related API ...
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