# Concorrência e async / await

Detalhes sobre a sintaxe `async def` para *funções de operação de rota* e alguns conceitos de código assíncrono, concorrência e paralelismo.

## Com pressa?

<abbr title="muito longo; não li"><strong>TL;DR:</strong></abbr>

Se você estiver utilizando bibliotecas de terceiros que dizem para você chamar as funções com `await`, como:

```Python
results = await some_library()
```

 * the final model of the project being assembled. There is no
 * overriding going on amongst the models being used in this test:
 * each model in the lineage is providing a value that is not present
 * anywhere else in the lineage. We are just making sure that values
 * down in the lineage are bubbling up where they should.
 *
 */
@Deprecated
class ProjectInheritanceTest extends AbstractProjectInheritanceTestCase {

 * the final model of the project being assembled. There is no
 * overriding going on amongst the models being used in this test:
 * each model in the lineage is providing a value that is not present
 * anywhere else in the lineage. We are just making sure that values
 * down in the lineage are bubbling up where they should.
 *
 */
@Deprecated
class ProjectInheritanceTest extends AbstractProjectInheritanceTestCase {

            }
        }
    }

    private Model assembleInheritance(
            List<Model> lineage, ModelBuilderRequest request, ModelProblemCollector problems) {
        Model parent = lineage.get(lineage.size() - 1);
        for (int i = lineage.size() - 2; i >= 0; i--) {
            Model child = lineage.get(i);
            parent = inheritanceAssembler.assembleModelInheritance(child, parent, request, problems);
        }

Maven super model

 Inheritance is recursive in Maven but there is a special model which is the implicit super parent in the lineage
 of models you may specify:

 all of the models that you specify are collected to produce a lineage and then the super model is place at
 the top of that lineage to provide default values.

 The super model is where we place all the values which we believe to be standard, values that can be shared and

 * the final model of the project being assembled. There is no
 * overriding going on amongst the models being used in this test:
 * each model in the lineage is providing a value that is not present
 * anywhere else in the lineage. We are just making sure that values
 * down in the lineage are bubbling up where they should.
 *
 */
@Deprecated
class ProjectInheritanceTest extends AbstractProjectInheritanceTestCase {

# Parâmetros da rota da URL

Você pode declarar os "parâmetros" ou "variáveis" com a mesma sintaxe utilizada pelo formato de strings do Python:

```Python hl_lines="6-7"
{!../../../docs_src/path_params/tutorial001.py!}
```

O valor do parâmetro que foi passado à `item_id` será passado para a sua função como o argumento `item_id`.

E ele gera _schemas_ OpenAPI.

É assim como funciona no Flask, Starlette, Responder etc.

Mas então, nós temos novamente o problema de ter uma micro-sintaxe, dentro de uma string Python (um grande YAML).

<project>
  <modelVersion>4.0.0</modelVersion>

  <groupId>tests</groupId>
  <artifactId>build-model-lineage</artifactId>
  <version>1</version>

/**
 * Result of a project build call.
 *
 * @since 4.0.0
 */
@Experimental
public interface ModelBuilderResult {

    /**
     * Gets the sequence of model identifiers that denote the lineage of models from which the effective model was
     * constructed. Model identifiers have the form {@code <groupId>:<artifactId>:<version>}. The first identifier from