return state() == RUNNING;
  }

  @Override
  public final State state() {
    return snapshot.externalState();
  }

  /** @since 14.0 */
  @Override
  public final Throwable failureCause() {
    return snapshot.failureCause();
  }

  /** @since 13.0 */
  @Override
  public final void addListener(Listener listener, Executor executor) {
    listeners.addListener(listener, executor);
  }

 * may invoke the event subscriber simultaneously from multiple threads.
 *
 * <p>This does not mark the method, and so should be used in combination with {@link Subscribe}.
 *
 * @author Cliff Biffle
 * @since 10.0
 */
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
@ElementTypesAreNonnullByDefault

 * under the License.
 */
package org.apache.maven.repository.legacy.resolver.conflict;

/**
 * Indicates that a specified conflict resolver implementation could not be found.
 *
 * @since 3.0
 */
@Deprecated
public class ConflictResolverNotFoundException extends Exception {
    // constants --------------------------------------------------------------

    /** The serial version ID. */

 * under the License.
 */
package org.apache.maven.api.services;

import java.io.Serial;

import org.apache.maven.api.annotations.Experimental;

/**
 * @since 4.0.0
 */
@Experimental
public class ArtifactInstallerException extends MavenException {

    /**
     *
     */
    @Serial
    private static final long serialVersionUID = 3652561971360586373L;

 */
package org.apache.maven.api.services;

import java.io.Serial;

import org.apache.maven.api.annotations.Experimental;

/**
 * The Exception class throw by the {@link ProjectBuilder} service.
 *
 * @since 4.0.0
 */
@Experimental
public class ProjectBuilderException extends MavenException {

    @Serial
    private static final long serialVersionUID = -7629871850875943799L;

    /**

 */
package org.apache.maven.api.services;

import java.io.Serial;

import org.apache.maven.api.annotations.Experimental;

/**
 * The Exception class throw by the {@link Prompter} service.
 *
 * @since 4.0.0
 */
@Experimental
public class PrompterException extends MavenException {

    @Serial
    private static final long serialVersionUID = -3505070928479515081L;

    /**

 * under the License.
 */
package org.apache.maven.api.services;

import java.io.Serial;

/**
 * Exceptions thrown by the {@link SuperPomProvider} service.
 *
 * @since 4.0.0
 */
public class SuperPomProviderException extends MavenException {

    @Serial
    private static final long serialVersionUID = -8659892034004509331L;

    public SuperPomProviderException() {

 */
package org.apache.maven.api.services;

import java.io.Serial;

import org.apache.maven.api.annotations.Experimental;

/**
 * The Exception class throw by the {@link ToolchainManager}.
 *
 * @since 4.0.0
 */
@Experimental
public class ToolchainManagerException extends MavenException {

    @Serial
    private static final long serialVersionUID = -9465854226608498L;

    /**

import java.lang.annotation.RetentionPolicy;

/**
 * This annotation tags types that are part of an experimental API.
 * Classes or methods annotated with this annotation may be changed / removed without notice.
 *
 * @since 4.0.0
 */
@Experimental
@Documented
@Retention(RetentionPolicy.CLASS)

import static java.lang.annotation.RetentionPolicy.RUNTIME;

/**
 * Indicates that annotated component should be instantiated before mojo execution starts and discarded after mojo
 * execution completes.
 *
 * @since 3.1.2
 */
@Target({TYPE})
@Retention(RUNTIME)
@ScopeAnnotation