If synchronous replication is configured above, replication is attempted right away prior to returning the PUT object response. In the event that the replication target is down, the `X-Amz-Replication-Status` is marked as `FAILED` and resynced with target when the scanner runs again.

But for this example, we'll use a very simple HTML document with some JavaScript, all inside a long string.

This, of course, is not optimal and you wouldn't use it for production.

In production you would have one of the options above.

But it's the simplest way to focus on the server-side of WebSockets and have a working example:

{* ../../docs_src/websockets_/tutorial001_py310.py hl[2,6:38,41:43] *}

## Create a `websocket` { #create-a-websocket }

   * to calling it exactly once.
   *
   * @since 10.0 (present in 1.0 as {@code run})
   */
  public void execute() {
    // Lock while we update our state so the add method above will finish adding any listeners
    // before we start to run them.
    RunnableExecutorPair list;
    synchronized (lock) {
      if (executed) {
        return;
      }
      executed = true;

        "org/gradle/testing/**",
        "org/gradle/vcs/**",
        "org/gradle/work/**",
        "org/gradle/workers/**",
        "org/gradle/util/**", // contains Path that clashes with `org.gradle.api.model.Path` imported above. This line should not appear before "org/gradle/api/**"
    )

    val excludes = listOf("**/internal/**")

    private val includePackagePatterns: List<Pattern> by lazy {
        includes.map {

      <outputDirectory>/</outputDirectory>
      <includes>
        <include>DEPENDENCIES</include>
        <!-- exclude the license and notice as they are not as accurate as the ones from above -->
      </includes>
    </fileSet>
  </fileSets>

     * parameter. The pipeType parameter should be at least one of
     * the <code>PIPE_TYPE</code> flags combined with the bitwise OR
     * operator <code>|</code>. See the examples listed above.
     *
     * @param url the SMB URL for the named pipe
     * @param pipeType the type of the pipe
     * @param unshared
     *            whether to use an exclusive connection for this pipe

export MINIO_CI_CD=1
export MINIO_ROOT_USER=minio
export MINIO_ROOT_PASSWORD=minio123
minio server /mnt/data
```

### 5. Test with a regular IAM user

Ensure that `mc` is installed and the configured with the above server with the alias `myminio`.

```sh
# 1. Create a bucket and a user, and upload a file. These operations will succeed.
mc mb myminio/test
mc admin user add myminio foo foobar123
mc cp /etc/issue myminio/test/

That also applies to callables with no parameters at all. The same as it would be for *path operation functions* with no parameters.

Then, we can change the dependency "dependable" `common_parameters` from above to the class `CommonQueryParams`:

{* ../../docs_src/dependencies/tutorial002_an_py310.py hl[11:15] *}

Pay attention to the `__init__` method used to create the instance of the class:

{* ../../docs_src/openapi_callbacks/tutorial001_py310.py hl[1,23] *}

### Create the callback *path operation* { #create-the-callback-path-operation }

To create the callback *path operation* use the same `APIRouter` you created above.

It should look just like a normal FastAPI *path operation*:

* It should probably have a declaration of the body it should receive, e.g. `body: InvoiceEvent`.

///

## Learn More { #learn-more }

You can learn more about **GraphQL** in the [official GraphQL documentation](https://graphql.org/).