import org.apache.maven.project.artifact.InvalidDependencyVersionException;
import org.apache.maven.settings.Settings;
import org.codehaus.plexus.PlexusContainer;
import org.codehaus.plexus.component.repository.exception.ComponentLookupException;

/**
 */
@Named
@Singleton
@Deprecated
public class DefaultPluginManager implements PluginManager {

    private final PlexusContainer container;

import org.apache.maven.settings.Proxy;
import org.apache.maven.settings.Server;
import org.apache.maven.settings.Settings;
import org.codehaus.plexus.PlexusContainer;
import org.codehaus.plexus.component.repository.exception.ComponentLookupException;
import org.eclipse.aether.RepositorySystemSession;

import static java.util.Objects.requireNonNull;

/**
 * A Maven execution session.
 *
 */

import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.stream.Collectors;

import org.apache.maven.plugin.Mojo;
import org.codehaus.plexus.component.repository.ComponentDescriptor;
import org.codehaus.plexus.configuration.PlexusConfiguration;
import org.codehaus.plexus.configuration.xml.XmlPlexusConfiguration;

/**
 * The bean containing the Mojo descriptor.<br>

        DefaultRepositorySystemSession session = super.initRepoSession();
        session.setWorkspaceReader(new TestMavenWorkspaceReader());
        return session;
    }

    @Override
    protected String component() {
        return "resolver";
    }

    @Test
    void testResolutionOfASingleArtifactWhereTheArtifactIsPresentInTheLocalRepository() throws Exception {
        Artifact a = createLocalArtifact("a", "1.0");

* How to set **validation constraints** as `maximum_length` or `regex`.
* A very powerful and easy to use **<abbr title="also known as components, resources, providers, services, injectables">Dependency Injection</abbr>** system.
* Security and authentication, including support for **OAuth2** with **JWT tokens** and **HTTP Basic** auth.

Das bedeutet, Sie können die neueste Version von Pydantic v2 installieren und die alten Pydantic‑v1‑Komponenten aus diesem Untermodul importieren und verwenden, als hätten Sie das alte Pydantic v1 installiert.

{* ../../docs_src/pydantic_v1_in_v2/tutorial001_an_py310.py hl[1,4] *}

Dieses Beispiel ist jedoch immer noch gültig und zeigt, wie mit den internen Komponenten interagiert wird.

///

Wir können denselben Ansatz auch verwenden, um in einem Exceptionhandler auf den Requestbody zuzugreifen.

import org.apache.maven.plugin.prefix.NoPluginFoundForPrefixException;
import org.apache.maven.plugin.version.PluginVersionResolutionException;
import org.apache.maven.project.MavenProject;
import org.codehaus.plexus.component.repository.exception.ComponentLookupException;

/**
 */
public class LifecycleExecutionPlanCalculatorStub implements LifecycleExecutionPlanCalculator {
    // clean

	var notFoundHandler http.Handler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		http.Error(w, "Metrics Resource Not found", http.StatusNotFound)
	})

	// Require that metrics path has one component at least.
	if path == "/" {
		return notFoundHandler
	}

	if isListingRequest {
		handler := h.listMetrics(path)
		if handler == nil {
			return notFoundHandler
		}
		return handler
	}

But this example is still valid and it shows how to interact with the internal components.

///

We can also use this same approach to access the request body in an exception handler.

All we need to do is handle the request inside a `try`/`except` block: