# 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 }

   * {@code A -> B}.
   *
   * @since 9.0 (in 1.0 as {@code com.google.common.base.Service.State})
   */
  enum State {
    /** A service in this state is inactive. It does minimal work and consumes minimal resources. */
    NEW,

    /** A service in this state is transitioning to {@link #RUNNING}. */
    STARTING,

    /** A service in this state is operational. */
    RUNNING,

     * look up the mojo from. <strong>Warning:</strong> The returned mojo instance must be released via
     * {@link #releaseMojo(Object, MojoExecution)} when the mojo is no longer needed to free any resources allocated for
     * it.
     *
     * @param mojoInterface The component role of the mojo, must not be {@code null}.
     * @param session The build session in whose context the mojo will be used, must not be {@code null}.

import org.gradle.api.internal.plugins.ExecutableJar
import org.gradle.api.internal.plugins.StartScriptGenerator
import org.gradle.api.internal.plugins.StartScriptTemplateBindingFactory
import org.gradle.api.internal.resources.FileCollectionBackedTextResource
import org.gradle.api.logging.LogLevel
import org.gradle.api.tasks.CacheableTask
import org.gradle.api.tasks.Input
import org.gradle.api.tasks.InputFiles
import org.gradle.api.tasks.Internal

	// Create buffered channel of size equal to total number of nodes.
	ch := make(chan Granted, len(restClnts))
	var wg sync.WaitGroup

	args := LockArgs{
		Owner:     owner,
		UID:       id,
		Resources: names,
		Source:    source,
		Quorum:    &quorum,
	}

	// Combined timeout for the lock attempt.
	ctx, cancel := context.WithTimeout(ctx, ds.Timeouts.Acquire)
	defer cancel()

		return
	}
	writeSuccessResponseJSON(w, resp)
}

// checkKMSActionAllowed checks for authorization for a specific action on a resource.
func checkKMSActionAllowed(r *http.Request, owner bool, cred auth.Credentials, action policy.KMSAction, resource string) bool {
	return globalIAMSys.IsAllowed(policy.Args{
		AccountName:     cred.AccessKey,
		Groups:          cred.Groups,

  html_url: https://github.com/teamhide/fastapi-boilerplate
  stars: 1436
  owner_login: teamhide
  owner_html_url: https://github.com/teamhide
- name: awesome-python-resources
  html_url: https://github.com/DjangoEx/awesome-python-resources
  stars: 1426
  owner_login: DjangoEx
  owner_html_url: https://github.com/DjangoEx
- name: fastcrud
  html_url: https://github.com/benavlabs/fastcrud
  stars: 1414

       * consistency with how weak references are cleared). That's a behavior change -- arguably the
       * removal of a feature.
       *
       * Fortunately, exceptions rarely contain references to expensive resources.
       */

      //
      seenExceptionsLocal = newConcurrentHashSet();
      /*
       * Other handleException() callers may see this as soon as we publish it. We need to populate

    @SuppressWarnings("CheckReturnValue") // only using super.createSource to create a file
    @Override
    public ByteSource createSource(byte[] bytes) throws IOException {
      super.createSource(bytes);
      return Resources.asByteSource(getFile().toURI().toURL());
    }
  }

  private static class UrlCharSourceFactory extends FileCharSourceFactory {

This guide explains how to contribute to the core Gradle components, 
extensions and documentation located in this repository.
For other extensions and components, see the 
[Gradle Community Resources](https://gradle.org/resources/).

This guide will help you to...

* maximize the chance of your changes being accepted
* work on the Gradle code base
* get help if you encounter trouble

## Before you start