import java.nio.file.Files;
import java.util.Map;
import java.util.Objects;

import org.apache.maven.artifact.repository.metadata.Metadata;
import org.apache.maven.metadata.v4.MetadataStaxReader;

/**
 * Handles deserialization of metadata from some kind of textual format like XML.
 *
 */
@Named
@Singleton
public class DefaultMetadataReader implements MetadataReader {

    @Override

import java.util.Map;
import java.util.Objects;

import org.apache.maven.model.Model;
import org.apache.maven.model.io.xpp3.MavenXpp3Writer;
import org.codehaus.plexus.util.WriterFactory;

/**
 * Handles serialization of a model into some kind of textual format like XML.
 *
 * @deprecated use {@link org.apache.maven.model.v4.MavenStaxWriter} instead
 */
@Named
@Singleton
@Deprecated(since = "4.0.0")

但是如果你需要，你也可以在依赖项中做到这一点。🤓

///

{* ../../docs_src/dependencies/tutorial008b_an_py39.py hl[18:22,31] *}

你还可以创建一个 [自定义异常处理器](../handling-errors.md#install-custom-exception-handlers){.internal-link target=_blank} 用于捕获异常（同时也可以抛出另一个 `HTTPException`）。

## 包含 `yield` 和 `except` 的依赖项

如果你在包含 `yield` 的依赖项中使用 `except` 捕获了一个异常，然后你没有重新抛出该异常（或抛出一个新异常），与在普通的Python代码中相同，FastAPI不会注意到发生了异常。

	"errors"
	"math"
	"net/url"
	"sort"
	"strings"
	"sync"

	"github.com/minio/minio/internal/bpool"
	"github.com/tinylib/msgp/msgp"
)

// Recycler will override the internal reuse in typed handlers.
// When this is supported, the handler will not do internal pooling of objects,
// call Recycle() when the object is no longer needed.
// The recycler should handle nil pointers.
type Recycler interface {
	Recycle()
}

///

{* ../../docs_src/dependencies/tutorial008b_an_py39.py hl[18:22,31] *}

예외를 처리하고(또는 추가로 다른 `HTTPException`을 발생시키기 위해) 사용할 수 있는 또 다른 방법은 [사용자 정의 예외 처리기](../handling-errors.md#install-custom-exception-handlers){.internal-link target=_blank}를 생성하는 것 입니다.

## `yield`와 `except`를 사용하는 의존성

`yield`를 사용하는 의존성에서 `except`를 사용하여 예외를 포착하고 예외를 다시 발생시키지 않거나 (또는 새 예외를 발생시키지 않으면), FastAPI는 해당 예외가 발생했는지 알 수 없습니다. 이는 일반적인 Python 방식과 동일합니다:

 *   <li>{@code STORAGE_SECRET_KEY}: The secret key for authentication.</li>
 *   <li>{@code STORAGE_REGION}: The region of the MinIO service.</li>
 * </ul>
 *
 * <p>
 * The {@link StorageURLConnection} class handles the actual connection and data retrieval from the storage service.
 * </p>
 */
public class Handler extends URLStreamHandler {

    /**
     * Constructs a new Handler.
     */
    public Handler() {

     * @return The executed QueryBuilder.
     */
    public abstract QueryBuilder execute(final QueryContext context, final Query query, final float boost);

    /**
     * Gets the class name of the query this command handles.
     * @return The query class name.
     */
    protected abstract String getQueryClassName();

    /**
     * Registers this query command with the query processor.

    void testImplementsRunnable() {
        TestLocking t = new TestLocking();
        assertTrue(t instanceof Runnable, "TestLocking should implement Runnable");
    }

    @Test
    @DisplayName("run method handles null URL gracefully")
    void testRunWithNullUrl() {
        TestLocking t = new TestLocking();
        t.url = null; // Null URL
        t.numIter = 0; // No iterations to avoid NPE

                    /*
                     * Most existing extensions don't define exported packages, i.e. no classes are to be exposed to
                     * plugins, yet the components provided by the extension (e.g. artifact handlers) must be
                     * accessible, i.e. we still must import the extension realm into the project realm.
                     */
                    exports = Arrays.asList(extensionRealm.getId());
                }

- **`org.codelibs.curl.CurlException`**: Unchecked exception for HTTP errors

### I/O Layer

- **`org.codelibs.curl.io.ContentCache`**: Handles automatic in-memory or on-disk caching of request/response bodies
- **`org.codelibs.curl.io.ContentOutputStream`**: Streaming utilities for efficient content handling

### Key Design Patterns