import org.apache.maven.plugin.prefix.NoPluginFoundForPrefixException;
import org.apache.maven.plugin.version.PluginVersionResolutionException;
import org.apache.maven.project.MavenProject;

/**
 * <strong>NOTE:</strong> This class is not part of any public api and can be changed or deleted without prior notice.
 *
 * @since 3.0
 */
@Named
@Singleton

            String msg = e.getMessage();
            if (msg == null || msg.length() <= 0) {
                // NOTE: There's java.nio.charset.MalformedInputException and sun.io.MalformedInputException
                if (e.getClass().getName().endsWith("MalformedInputException")) {
                    msg = "Some input bytes do not match the file encoding.";
                } else {
                    msg = e.getClass().getSimpleName();

```

////

In beiden Fällen bedeutet das, dass `item` ein `int` oder ein `str` sein kann.

#### Vielleicht `None` { #possibly-none }

Sie können deklarieren, dass ein Wert ein `str`, aber vielleicht auch `None` sein kann.

In Python 3.6 und darüber (inklusive Python 3.10) können Sie das deklarieren, indem Sie `Optional` vom `typing` Modul importieren und verwenden.

{* ../../docs_src/response_model/tutorial004_py310.py hl[9,11:12] *}

* `description: Union[str, None] = None` (or `str | None = None` in Python 3.10) has a default of `None`.
* `tax: float = 10.5` has a default of `10.5`.
* `tags: List[str] = []` has a default of an empty list: `[]`.

but you might want to omit them from the result if they were not actually stored.

	// P384 and P521 are not constant-time yet, but since we don't
	// reuse ephemeral keys, using them for ECDH should be OK.
	kexAlgoECDH256, kexAlgoECDH384, kexAlgoECDH521,
	kexAlgoDH14SHA256, kexAlgoDH16SHA512, kexAlgoDH14SHA1,
	kexAlgoDH1SHA1,
}

// supportedPubKeyAuthAlgos specifies the supported client public key
// authentication algorithms. Note that this doesn't include certificate types

	g := errgroup.WithNErrs(len(sys.peerClients))
	peerChannels := make([]<-chan madmin.ReplicationMRF, len(sys.peerClients))
	for index, client := range sys.peerClients {
		if client == nil {
			continue
		}
		host := client.host.String()
		if host != node && node != "all" {
			continue
		}
		index := index

     *
     * @param project The project to try to resolve the artifact from, must not be <code>null</code>.
     * @param requestedArtifact The artifact to resolve, must not be <code>null</code>.
     * @return The matching artifact from the project or <code>null</code> if not found. Note that this
     */
    private Artifact findMatchingArtifact(MavenProject project, Artifact requestedArtifact) {

 *   <li>SCHEDULED: Step is queued for execution</li>
 *   <li>EXECUTED: Step has completed successfully</li>
 *   <li>FAILED: Step execution failed</li>
 * </ul>
 *
 * <p><strong>NOTE:</strong> This class is not part of any public API and can be changed or deleted without prior notice.</p>
 *
 * @since 3.0
 */
@Named
public class BuildPlanExecutor {

    private static final Object GLOBAL = new Object();

Dieser **Proxy** würde normalerweise unmittelbar vor dem Übermitteln der Anfrage an den **Anwendungsserver** einige HTTP-Header dynamisch setzen, um dem Anwendungsserver mitzuteilen, dass der Request vom Proxy **weitergeleitet** wird.

/// note | Technische Details

Die Proxy-Header sind:

* <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/X-Forwarded-For" class="external-link" target="_blank">X-Forwarded-For</a>

                            + ". Building this project requires a newer version of Maven.",
                    tracker);

        } else if (olderThanAll) {
            // note this will not be hit for Maven 1.x project.xml as it is an incompatible schema
            addViolation(
                    problems,
                    Severity.FATAL,
                    Version.V20,