// Tests that a listener is only invoked by a single thread at any time even if multiple threads are
// invoking the wrapper concurrently.
//JAVA TO C# CONVERTER WARNING: Method 'throws' clauses are not available in .NET:
//ORIGINAL LINE: public void concurrentExecution() throws InterruptedException
public virtual void concurrentExecution()
{
int nThreads = Runtime.Runtime.availableProcessors();
int resultsPerThread = 10;
ConcurrentLinkedQueue <string> errors = new ConcurrentLinkedQueue <string>();
System.Threading.CountdownEvent latch = new System.Threading.CountdownEvent(1);
int expectedResultCount = nThreads * resultsPerThread;
Listener listener = new Listener(errors, latch);
System.Action <CalculationResults> wrapper = new ListenerWrapper(listener, expectedResultCount, ImmutableList.of(), ImmutableList.of());
ExecutorService executor = Executors.newFixedThreadPool(nThreads);
CalculationResult result = CalculationResult.of(0, 0, Result.failure(FailureReason.ERROR, "foo"));
CalculationTarget target = new CalculationTargetAnonymousInnerClass(this);
CalculationResults results = CalculationResults.of(target, ImmutableList.of(result));
IntStream.range(0, expectedResultCount).forEach(i => executor.submit(() => wrapper(results)));
latch.await();
executor.shutdown();
if (!errors.Empty)
{
//JAVA TO C# CONVERTER TODO TASK: Most Java stream collectors are not converted by Java to C# Converter:
string allErrors = errors.collect(joining("\n"));
fail(allErrors);
}
}