/**
 * A {@link FutureTask} that also implements the {@link ListenableFuture} interface. Unlike {@code
 * FutureTask}, {@code ListenableFutureTask} does not provide an overrideable {@link
 * FutureTask#done() done()} method. For similar functionality, call {@link #addListener}.
 *
 * <p>Few users should use this class. It is intended primarily for those who are implementing an

* The PR doesn't add any additional or extraneous files.
* The translation seems to have a similar structure as the original English file.
* The translation doesn't seem to change the original content, for example with obvious additional documentation sections.

Una **imagen de contenedor** normalmente incluye en sus metadatos el programa o comando por defecto que debería ser ejecutado cuando el **contenedor** se inicie y los parámetros que deben pasar a ese programa. Muy similar a lo que sería si estuviera en la línea de comandos.

Cuando un **contenedor** se inicia, ejecutará ese comando/programa (aunque puedes sobrescribirlo y hacer que ejecute un comando/programa diferente).

So, you can use `user_agent` as you normally would in Python code, instead of needing to capitalize the first letters as `User_Agent` or something similar.

If for some reason you need to disable automatic conversion of underscores to hyphens, set the parameter `convert_underscores` of `Header` to `False`:

{* ../../docs_src/header_params/tutorial002_an_py310.py hl[10] *}

    public Map<String, String[]> fields = new HashMap<>();

    /** The conditions. */
    public Map<String, String[]> as = new HashMap<>();

    /** The extra queries. */
    public String[] ex_q;

    /** The similar document hash. */
    public String sdh;

    @Override
    public String getQuery() {
        return q;
    }

    @Override
    public String[] getExtraQueries() {

     */
    @ValidateTypeFailure
    public Integer offset;

    /**
     * The page number for pagination.
     */
    @ValidateTypeFailure
    public Integer pn;

    /**
     * Similar document hash for finding related documents.
     */
    @Size(max = 1000)
    public String sdh;

    /**
     * Parameter to control tracking of total hits in search results.
     */
    @Size(max = 100)

## Example { #example }

For a simple example, let's consider a file structure similar to the one described in [Bigger Applications](../tutorial/bigger-applications.md){.internal-link target=_blank} and [Testing](../tutorial/testing.md){.internal-link target=_blank}:

```
.
├── app
│   ├── __init__.py

* There can be **multiple processes** of the **same program** running at the same time.

If you check out the "task manager" or "system monitor" (or similar tools) in your operating system, you will be able to see many of those processes running.

     * <p>
     * The implementation may optimize the execution by:
     * <ul>
     *   <li>Returning cached results for previously executed requests</li>
     *   <li>Grouping similar requests for batch processing</li>
     *   <li>Processing requests in parallel where appropriate</li>
     * </ul>
     *
     * @param <REQ> The request type
     * @param <REP> The response type

    <function-signature>java.lang.String url(java.lang.String)</function-signature>
    <example>&lt;a href="${fe:url(param:info)}" ...</example>
  </function>

  <function>
    <description>Encode Similar Document Hash.</description>
    <name>sdh</name>
    <function-class>org.codelibs.fess.taglib.FessFunctions</function-class>
    <function-signature>java.lang.String sdh(java.lang.String)</function-signature>