### Injection de dépendances { #dependency-injection }

FastAPI inclut un système d’<dfn title='aussi connu sous le nom de « composants », « ressources », « services », « fournisseurs »'><strong>Injection de dépendances</strong></dfn> extrêmement simple à utiliser, mais extrêmement puissant.

  @GwtIncompatible // java.util.regex
  public static Splitter onPattern(String separatorPattern) {
    return onPatternInternal(Platform.compilePattern(separatorPattern));
  }

  /**
   * Returns a splitter that divides strings into pieces of the given length. For example, {@code
   * Splitter.fixedLength(2).split("abcde")} returns an iterable containing {@code ["ab", "cd",

import java.util.Comparator;
import java.util.Iterator;
import java.util.NoSuchElementException;
import java.util.SortedSet;
import org.jspecify.annotations.Nullable;

/**
 * A range (or "interval") defines the <i>boundaries</i> around a contiguous span of values of some
 * {@code Comparable} type; for example, "integers from 1 to 100 inclusive." Note that it is not

 * may never contain more than {@link Integer#MAX_VALUE} occurrences of any one element.
 *
 * <p>{@code Multiset} refines the specifications of several methods from {@code Collection}. It
 * also defines an additional query operation, {@link #count}, which returns the count of an
 * element. There are five new bulk-modification operations, for example {@link #add(Object, int)},

      But it's always weird that published poms reference test-only libraries at all, so I'm not in any rush to do so.
      -->
    </dependencies>
  </dependencyManagement>
  <build>
    <!-- Handle where Guava deviates from Maven defaults -->
    <sourceDirectory>src</sourceDirectory>
    <testSourceDirectory>test</testSourceDirectory>
    <resources>
      <resource>
        <directory>../..</directory>
        <includes>

 *
 * <p>It implements the Runnable interface to be executed in a separate thread,
 * and the AutoCloseable interface to ensure resources are properly released after use.
 *
 * <p>The crawler uses several services and components, such as UrlQueueService, DataService,
 * UrlFilter, RuleManager, CrawlerContainer, IntervalController, and CrawlerClientFactory,
 * to perform its tasks.
 *

* Cluster federation servers have changed the location in etcd where federated services are stored, so existing federated services must be deleted and recreated. Before upgrading, export all federated services from the federation server and delete the services. After upgrading the cluster, recreate the federated services from the exported data. ([#37770](https://github.com/kubernetes/kubernetes/pull/37770), [@enj](https://github.com/enj))

import jcifs.NetbiosName;

/**
 * This class represents a NetBIOS over TCP/IP address. Under normal
 * conditions, users of jCIFS need not be concerned with this class as
 * name resolution and session services are handled internally by the smb package.
 *
 *
 *  * Applications can use the methods <code>getLocalHost</code>,
 * <code>getByName</code>, and
 * <code>getAllByAddress</code> to create a new NbtAddress instance. This

你从不会直接调用这些函数。它们由你的框架（此处为 **FastAPI**）调用。

通过依赖注入系统，你还可以告诉 **FastAPI**，你的*路径操作函数*还“依赖”某些应在*路径操作函数*之前执行的内容，**FastAPI** 会负责执行它并“注入”结果。

“依赖注入”的其他常见术语包括：

* 资源（resources）
* 提供方（providers）
* 服务（services）
* 可注入（injectables）
* 组件（components）

## **FastAPI** 插件 { #fastapi-plug-ins }

可以使用**依赖注入**系统构建集成和“插件”。但实际上，根本**不需要创建“插件”**，因为通过依赖项可以声明无限多的集成与交互，使其可用于*路径操作函数*。

	globalPolicySys = NewPolicySys()
	objLayer, err := newErasureServerPools(ctx, endpoints)
	if err != nil {
		return nil, nil, err
	}

	// Make objLayer available to all internal services via globalObjectAPI.
	globalObjLayerMutex.Lock()
	globalObjectAPI = objLayer
	globalObjLayerMutex.Unlock()
	return objLayer, erasureDirs, nil
}