Five Ways of Synchronising Multithreaded Integration Tests

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A few weeks ago I wrote a blog on synchronizing multithreaded integration tests, which was republished on DZone Javalobby from where it received a comment from Robert Saulnier who quite rightly pointed out that you can also use join() to synchronize a worker thread and its unit tests. This got me thinking, just how many ways can you synchronise multi-threaded integration tests? So, I started counting... and came up with:

  1. Using a random delay.
  2. Adding a CountDownLatch
  3. Thread.join()
  4. Acquiring a Semaphore
  5. With a Future and ExecutorService