---

**FastAPI** doesn't make any compromise with any database, data model or tool.

It gives you all the flexibility to choose the ones that fit your project the best.

## OpenAPI-Client-Generatoren

Es gibt viele Tools zum Generieren von Clients aus **OpenAPI**.

Ein gängiges Tool ist <a href="https://openapi-generator.tech/" class="external-link" target="_blank">OpenAPI Generator</a>.

This can help ensure that clients do not hold onto pooled connections for too long.
This is not strictly required; Ztunnel clients have both keepalives (which will start to fail once the other end is shut down) and pool idle timeouts (which will close the connection when it has had no activity for some period; because the backend is gone, there will be no activity).

      assertTrue(afterBurst >= 1000);
    }
  }

  /**
   * This neat test shows that no matter what weights we use in our requests, if we push X amount of
   * permits in a cool state, where X = rate * timeToCoolDown, and we have specified a
   * timeToWarmUp() period, it will cost as the prescribed amount of time. E.g., calling

# Bigger Applications - Multiple Files

If you are building an application or a web API, it's rarely the case that you can put everything in a single file.

**FastAPI** provides a convenience tool to structure your application while keeping all the flexibility.

/// info

If you come from Flask, this would be the equivalent of Flask's Blueprints.

///

## An example file structure

Let's say you have a file structure like this:

```

      assertTrue(afterBurst >= 1000);
    }
  }

  /**
   * This neat test shows that no matter what weights we use in our requests, if we push X amount of
   * permits in a cool state, where X = rate * timeToCoolDown, and we have specified a
   * timeToWarmUp() period, it will cost as the prescribed amount of time. E.g., calling

        }
      } 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
        // longer than necessary.
        submitting = null;
      }
    }

              </executions>
            </plugin>
          </plugins>
      </build>
    </profile>
    <profile>
      <!--
          Passes JDK 11-12-specific `no-module-directories` flag to Javadoc tool,
          which is required to make symbol search work correctly in the generated
          pages.

          This flag does not exist on 9-10 and 13+ (https://bugs.openjdk.java.net/browse/JDK-8215582).

              </executions>
            </plugin>
          </plugins>
      </build>
    </profile>
    <profile>
      <!--
          Passes JDK 11-12-specific `no-module-directories` flag to Javadoc tool,
          which is required to make symbol search work correctly in the generated
          pages.

          This flag does not exist on 9-10 and 13+ (https://bugs.openjdk.java.net/browse/JDK-8215582).

                    .build());
            options.addOption(Option.builder()
                    .longOpt(ENC)
                    .desc("Launch the Maven Encryption tool (script option).")
                    .build());
            options.addOption(Option.builder()
                    .longOpt(YJP)
                    .desc("Launch the JVM with Yourkit profiler (script option).")