Você pode adicionar manipuladores de exceção customizados com [a mesma seção de utilidade de exceções presentes no Starlette](https://www.starlette.dev/exceptions/).

Digamos que você tenha uma exceção customizada `UnicornException` que você (ou uma biblioteca que você use) precise lançar (`raise`).

import org.apache.maven.api.Event;
import org.apache.maven.api.EventType;
import org.apache.maven.api.MojoExecution;
import org.apache.maven.api.Project;
import org.apache.maven.api.Session;
import org.apache.maven.execution.ExecutionEvent;

public class DefaultEvent implements Event {
    private final InternalMavenSession session;
    private final ExecutionEvent delegate;
    private final EventType eventType;

   * class documentation above). This method is <i>generally expected</i>, but not absolutely
   * required, to have the following properties:
   *
   * <ul>
   *   <li>Its execution does not cause any observable side effects.
   *   <li>The computation is <i>consistent with equals</i>; that is, {@link Objects#equal
   *       Objects.equal}{@code (a, b)} implies that {@code predicate.apply(a) ==

            Thread.yield();
          }
        } finally {
          executor.shutdownNow();
        }

        switcher.get(); // to check for (extremely unlikely) exceptions
      }
    }
  }

  public void testDeleteRecursively_nonDirectoryFile() throws IOException {
    try (FileSystem fs = newTestFileSystem(SECURE_DIRECTORY_STREAM)) {
      Path file = fs.getPath("dir/a");

   * service changes state. The listener will not have previous state changes replayed, so it is
   * suggested that listeners are added before the service starts.
   *
   * <p>{@code addListener} guarantees execution ordering across calls to a given listener but not
   * across calls to multiple listeners. Specifically, a given listener will have its callbacks

 * the License.
 */

package com.google.common.util.concurrent.testing;

import static java.util.concurrent.Executors.newCachedThreadPool;
import static java.util.concurrent.Executors.newSingleThreadExecutor;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.junit.Assert.assertThrows;

import org.lastaflute.web.Execute;
import org.lastaflute.web.response.HtmlResponse;

/**
 * Action class for handling general error pages.
 * This action displays error pages when unhandled exceptions occur
 * during search operations or page navigation.
 */
public class ErrorAction extends FessSearchAction {

    /**
     * Default constructor for ErrorAction.
     */
    public ErrorAction() {

package jcifs.smb1.smb1;

/**
 * The <code>SmbAuthException</code> encapsulates the variety of
 * authentication related error codes returned by an SMB server.
 * <p>
 * See <a href="../../../authhandler.html">jCIFS Exceptions and NtlmAuthenticator</a> for more information about <code>SmbAuthException</code>.
 */

public class SmbAuthException extends SmbException {

    SmbAuthException(final int errcode) {
        super(errcode, null);

import java.util.List;

import org.apache.maven.api.Project;
import org.apache.maven.api.RemoteRepository;
import org.apache.maven.api.Session;
import org.apache.maven.api.annotations.Nullable;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.impl.InternalSession;

import static org.apache.maven.internal.impl.CoreUtils.cast;

public interface InternalMavenSession extends InternalSession {

package org.apache.maven.lifecycle.internal;

import javax.inject.Named;
import javax.inject.Singleton;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.apache.maven.execution.MavenSession;
import org.apache.maven.lifecycle.internal.builder.BuilderCommon;
import org.apache.maven.project.MavenProject;

/**