* Object x = new MyClass() {
 *   ...
 *   protected void finalize() { latch.countDown(); ... }
 * };
 * x = null;  // Hint to the JIT that x is stack-unreachable
 * GcFinalization.await(latch);
 * }</pre>
 *
 * <p>Here's an example that uses a user-defined finalization predicate:
 *
 * <pre>{@code
 * final WeakHashMap<Object, Object> map = new WeakHashMap<>();
 * map.put(new Object(), Boolean.TRUE);

        coordinator.stop()

        then: "stops"
        stopped

        when: "requested again"
        coordinator.stop()

        then:
        stopped
        0 * _._
    }

    def "await idle timeout does nothing when already stopped"() {
        given:
        coordinator.stop()

        when:
        def result = coordinator.awaitStop()

        then:
        stopped

      throw RuntimeException("boom!")
    }

    queue.schedule("task", TimeUnit.MILLISECONDS.toNanos(200)) {
      log.put("normal task running")
      return@schedule -1L
    }

    queue.idleLatch().await(500, TimeUnit.MILLISECONDS)

    assertThat(log.take()).isEqualTo("failing task running")
    assertThat(log.take()).isEqualTo("uncaught exception: java.lang.RuntimeException: boom!")

# 並行処理と async / await

*path operation 関数*のための `async def` に関する詳細と非同期 (asynchronous) コード、並行処理 (Concurrency)、そして、並列処理 (Parallelism) の背景について。

## 急いでいますか？

<abbr title="too long; didn't read (長すぎて読めない人のための要約という意味のスラング)"><strong>TL;DR:</strong></abbr>

次のような、`await` を使用して呼び出すべきサードパーティライブラリを使用している場合:

```Python
results = await some_library()
```

以下の様に `async def` を使用して*path operation 関数*を宣言します。

```Python hl_lines="2"
@app.get('/')

            client.connection.connect()
            client.outgoingService1.doStuff("from client 1")
            client.outgoingService1.doStuff("from client 2")
        }
        received.await()
        client.stop()
        server.stop()

        then:
        1 * serverService.doStuff("from client 1")
        1 * serverService.doStuff("from client 2") >> { received.countDown() }

    }

    @Override
    public void await() throws InterruptedException {
      lock.lock();
      try {
        condition.await();
      } finally {
        lock.unlock();
      }
    }

    @Override
    public boolean await(long time, TimeUnit unit) throws InterruptedException {
      lock.lock();
      try {
        return condition.await(time, unit);
      } finally {

            collectOutputs(builder)
            builder.setStreamedValueListener(listener)
            builder.run(handler)

            modelReceived.await()
            request.waitForAllPendingCalls()
            request.releaseAll()
            finished.await()
        }

        then:
        models.size() == 2
        models[0] instanceof GradleProject
        models[1] instanceof CustomModel
    }

 * Object x = new MyClass() {
 *   ...
 *   protected void finalize() { latch.countDown(); ... }
 * };
 * x = null;  // Hint to the JIT that x is stack-unreachable
 * GcFinalization.await(latch);
 * }</pre>
 *
 * <p>Here's an example that uses a user-defined finalization predicate:
 *
 * <pre>{@code
 * final WeakHashMap<Object, Object> map = new WeakHashMap<>();
 * map.put(new Object(), Boolean.TRUE);

    }

    def "can wait on results to complete"() {
        when:
        workerExecutor.await()

        then:
        1 * asyncWorkerTracker.waitForCompletion(_, RETAIN_PROJECT_LOCKS)
    }

    def "all errors are thrown when waiting on multiple results"() {
        when:
        workerExecutor.await()

        then:

                operationQueue.waitForCompletion()
            }
        })
        waitForCompletionThread.start()

        and:
        // wait for operations to begin running
        startedLatch.await(30, TimeUnit.SECONDS)

        and:
        operationQueue.cancel()

        and:
        // release the running operations to complete
        releaseLatch.countDown()