/**
* Drives the actual test on an Executor and verifies the result
*
* @param maps the caches to be tested
* @throws IOException
* @throws InterruptedException
*/
private void testConcurrentLocking(List<ConcurrentMap<String, String>> maps)
throws IOException, InterruptedException {
SharedStats stats = new SharedStats();
ThreadPoolExecutor executor = (ThreadPoolExecutor) Executors.newFixedThreadPool(NODES_NUM);
List<StressingThread> threads = new ArrayList<StressingThread>();
for (ConcurrentMap<String, String> map : maps) {
StressingThread thread = new StressingThread(stats, map);
threads.add(thread);
executor.execute(thread);
}
executor.shutdown();
Thread.sleep(5000);
int putsAfter5Seconds = stats.succesfullPutsCounter.get();
System.out.println("\nSituation after 5 seconds:");
System.out.println(stats.toString());
executor.awaitTermination(STRESS_TIME_MINUTES, TimeUnit.MINUTES);
stats.globalQuit = true;
executor.awaitTermination(10, TimeUnit.SECONDS); // give some time to awake and quit
executor.shutdownNow();
System.out.println("\nFinal situation:");
System.out.println(stats.toString());
assert !stats.seenFailures : "at least one thread has seen unexpected state";
assert stats.succesfullPutsCounter.get() > 0 : "the lock should have been taken at least once";
assert stats.succesfullPutsCounter.get() > putsAfter5Seconds
: "the lock count didn't improve since the first 5 seconds. Deadlock?";
assert stats.succesfullPutsCounter.get() == stats.lockReleasedCounter.get()
: "there's a mismatch in acquires and releases count";
assert stats.lockOwnersCounter.get() == 0 : "the lock is still held at test finish";
}
private void checkIsTrue(boolean assertion, String message) {
if (assertion == false) {
stats.seenFailures = true;
System.out.println(message);
}
}
