if (!(service instanceof NoOpService)) {
            logger.get().log(Level.FINE, "Started {0} in {1}.", new Object[] {service, stopwatch});
          }
        }
        // Queue our listeners

        // Did a service fail?
        if (to == FAILED) {
          enqueueFailedEvent(service);
        }

        if (states.count(RUNNING) == numberOfServices) {

     *
     * @param key the key to be placed into this property list.
     * @param value the value corresponding to the key.
     * @return the previous value of the specified key in this property list, or null if it did not have one.
     */
    public Object setProperty(String key, String value) {
        return this.put(key, value);
    }

    @Override
    public String put(String key, String value) {

    if ((a ^ b) < 0 | (a ^ naiveSum) >= 0) {
      // If a and b have different signs or a has the same sign as the result then there was no
      // overflow, return.
      return naiveSum;
    }
    // we did over/under flow, if the sign is negative we should return MAX otherwise MIN
    return Long.MAX_VALUE + ((naiveSum >>> (Long.SIZE - 1)) ^ 1);
  }

  /**

        },
        "danish_keywords": {
          "type":       "keyword_marker",
          "keywords": ["Hej", "verden", "Søg"]

        },
        "danish_keywords": {
          "type":       "keyword_marker",
          "keywords": ["Hej", "verden", "Søg"]

          delegate = null;
          this.task = task;
          localDelegate.execute(this);
        }
      } finally {
        // Important to null this out here - if we did *not* execute inline, we might still
        // run() on the same thread that called execute() - such as in a thread pool, and think
        // that it was happening inline. As a side benefit, avoids holding on to the Thread object

              throw new SecurityException("Disallowed: " + p);
            }
          }
        };
    System.setSecurityManager(disallowFilesSecurityManager);
    try {
      file.exists();
      fail("Did not get expected SecurityException");
    } catch (SecurityException expected) {
    }
    ClassPath classPath = ClassPath.from(getClass().getClassLoader());

ここで、`/unicorns/yolo`をリクエストすると、*path operation*は`UnicornException`を`raise`します。

しかし、これは`unicorn_exception_handler`で処理されます。

そのため、HTTPステータスコードが`418`で、JSONの内容が以下のような明確なエラーを受け取ることになります:

```JSON
{"message": "Oops! yolo did something. There goes a rainbow..."}
```

/// note | "技術詳細"

また、`from starlette.requests import Request`と`from starlette.responses import JSONResponse`を使用することもできます。

labels.search_result_time=({0} sec)
labels.prev_page=Prev
labels.next_page=Next
labels.did_not_match=Your search - <b>{0}</b> - did not match any documents.
labels.search_title=Fess
labels.search_popular_word_word=Popular Words:
labels.search_related_queries=Related Words:
labels.search_result_select_sort=-- Sort --

/// tip

If you used <a href="https://github.com/astral-sh/uv" class="external-link" target="_blank">`uv`</a> to create the virtual environment, it already did this for you, you can skip this step. 😎

///

/// tip

Do this **once**, right after you create the virtual environment.

///

<div class="termy">

```console