* `Query` from `fastapi`
* `Annotated` from `typing`

{* ../../docs_src/query_params_str_validations/tutorial002_an_py310.py hl[1,3] *}

/// info

FastAPI added support for `Annotated` (and started recommending it) in version 0.95.0.

If you have an older version, you would get errors when trying to use `Annotated`.

   * completed, has already been cancelled, or could not be cancelled for some other reason. If
   * successful, and this step has not started when {@code cancel} is called, this step should never
   * run.
   *
   * <p>If successful, causes the objects captured by this step (if already started) and its input
   * step(s) for later closing to be closed on their respective {@link Executor}s. If any such calls

                        break;
                    }
                }
            }
        }, scheduler);

        asyncNotifyTasks.put(registrationId, asyncTask);
        log.debug("Started async notification monitoring for {}", registrationId);
    }

    /**
     * Stops asynchronous notification monitoring for a registration.
     *
     * @param registrationId the registration ID
     */

This document explains how to setup Prometheus and configure it to scrape data from MinIO servers.

## Prerequisites

To get started with MinIO, refer [MinIO QuickStart Document](https://docs.min.io/community/minio-object-store/operations/deployments/baremetal-deploy-minio-on-redhat-linux.html).
Follow below steps to get started with MinIO monitoring using Prometheus.

### 1. Download Prometheus

    String key = "bar";

    // start computing thread
    new Thread() {
      @Override
      public void run() {
        result.set(0, cache.getUnchecked(key));
        doneSignal.countDown();
      }
    }.start();

    // wait for computation to start
    secondSignal.await();

    // start waiting thread
    new Thread() {
      @Override

        session.addUserMessage("User 2");
        session.addAssistantMessage("Assistant 2");
        session.addUserMessage("User 3");
        session.addAssistantMessage("Assistant 3");

        // Trimming to 4 starts at index 2 which is user - no skip needed
        session.trimHistory(4);

        final List<ChatMessage> messages = session.getMessages();
        assertEquals(4, messages.size());

## Prerequisites

Install Dex by following [Dex Getting Started Guide](https://dexidp.io/docs/getting-started/)

### Start Dex

```
~ ./bin/dex serve dex.yaml
time="2020-07-12T20:45:50Z" level=info msg="config issuer: http://127.0.0.1:5556/dex"
time="2020-07-12T20:45:50Z" level=info msg="config storage: sqlite3"

	objAPI := newObjectLayerFn()
	if objAPI == nil {
		return errServerNotInitialized
	}

	started := tracker.Started
	if started.IsZero() || started.Equal(timeSentinel) {
		healingLogIf(ctx, fmt.Errorf("unexpected tracker healing start time found: %v", started))
		started = time.Time{}
	}

	// Final tracer update before quitting
	defer func() {
		tracker.setObject("")

    delegate.enqueue(response.wrap())
  }

  @Throws(IOException::class)
  @JvmOverloads
  fun start(port: Int = 0) {
    started = true
    delegate.start(port)
  }

  @Throws(IOException::class)
  fun start(
    inetAddress: InetAddress,
    port: Int,
  ) {
    started = true
    delegate.start(inetAddress, port)
  }

  @Synchronized
  @Throws(IOException::class)
  fun shutdown() {

    log(task, queue, messageBlock())
  }
}

internal inline fun <T> Logger.logElapsed(
  task: Task,
  queue: TaskQueue,
  block: () -> T,
): T {
  var startNs = -1L
  val loggingEnabled = isLoggable(Level.FINE)
  if (loggingEnabled) {
    startNs = queue.taskRunner.backend.nanoTime()
    log(task, queue, "starting")
  }

  var completedNormally = false
  try {
    val result = block()