# Dependencies { #dependencies }

**FastAPI** has a very powerful but intuitive **<abbr title="also known as components, resources, providers, services, injectables">Dependency Injection</abbr>** system.

It is designed to be very simple to use, and to make it very easy for any developer to integrate other components with **FastAPI**.

## What is "Dependency Injection" { #what-is-dependency-injection }

     */
    public void healthy() {}

    /**
     * Called when the all of the component services have reached a terminal state, either
     * {@linkplain State#TERMINATED terminated} or {@linkplain State#FAILED failed}.
     */
    public void stopped() {}

    /**
     * Called when a component service has {@linkplain State#FAILED failed}.
     *
     * @param service The service that failed.
     */

import org.apache.maven.toolchain.model.PersistedToolchains;

/**
 * Builds the toolchains model from a previously configured filesystem path to the toolchains file.
 * <strong>Note:</strong> This is an internal component whose interface can change without prior notice.
 *
 * @deprecated use {@link org.apache.maven.toolchain.building.ToolchainsBuilder} instead
 */
@Deprecated
public interface ToolchainsBuilder {

    /**

    String getFullUNCPath();

    /**
     * Sets the path to the resource.
     *
     * @param path the path to set
     */
    void setPath(String path);

    /**
     * Sets the full UNC path components.
     *
     * @param domain the domain name
     * @param server the server name
     * @param fullPath the full UNC path
     */
    void setFullUNCPath(String domain, String server, String fullPath);

    /**

- 🚀 [React](https://react.dev) para el frontend.
    - 💃 Usando TypeScript, hooks, [Vite](https://vitejs.dev), y otras partes de una stack moderna de frontend.
    - 🎨 [Chakra UI](https://chakra-ui.com) para los componentes del frontend.
    - 🤖 Un cliente de frontend generado automáticamente.
    - 🧪 [Playwright](https://playwright.dev) para pruebas End-to-End.
    - 🦇 Soporte para modo oscuro.

- 🚀 [React](https://react.dev) for the frontend.
    - 💃 Using TypeScript, hooks, [Vite](https://vitejs.dev), and other parts of a modern frontend stack.
    - 🎨 [Chakra UI](https://chakra-ui.com) for the frontend components.
    - 🤖 An automatically generated frontend client.
    - 🧪 [Playwright](https://playwright.dev) for End-to-End testing.
    - 🦇 Dark mode support.

At first, it didn't have an automatic API documentation web UI, but I knew I could add Swagger UI to it.

It had a dependency injection system. It required pre-registration of components, as other tools discussed above. But still, it was a great feature.

 * specific language governing permissions and limitations
 * under the License.
 */

/**
 * Provides a caching infrastructure for Maven requests and their results.
 * <p>
 * This package contains the core components for implementing and managing caches in Maven:
 * <ul>
 *   <li>{@link org.apache.maven.api.cache.RequestCache} - The main interface for caching request results</li>

/**
 * Mock of a Wagon for testing
 *
 */
public class WagonMock extends FileWagon {

    /**
     * A field that can be configured in the Wagon
     *
     * @component.configuration default="configurableField"
     */
    private String configurableField = null;

    public void setConfigurableField(String configurableField) {
        this.configurableField = configurableField;
    }

  <id>dir</id>
  <formats>
    <format>dir</format>
  </formats>
  <includeBaseDirectory>false</includeBaseDirectory>
  <componentDescriptors>
    <componentDescriptor>src/assembly/component.xml</componentDescriptor>
  </componentDescriptors>