* a MojoException if error conditions occur.<br>
 *
 * @since 4.0.0
 */
@Experimental
@FunctionalInterface
@Consumer
public interface Mojo {
    /**
     * Perform whatever build-process behavior this <code>Mojo</code> implements.<br>
     * This is the main trigger for the <code>Mojo</code> inside the <code>Maven</code> system, and allows

@Target(ElementType.TYPE)
@Inherited
public @interface Mojo {
    /**
     * goal name (required).
     * @return the goal name
     */
    @Nonnull
    String name();

    /**
     * default phase to bind your mojo.
     * @return the default phase
     */
    @Nonnull
    String defaultPhase() default "";

    /**
     * does your mojo requires a project to be executed?
     * @return requires a project

    private final MojoDescriptor mojo;

    public PluginParameterException(MojoDescriptor mojo, List<Parameter> parameters) {
        super(
                mojo.getPluginDescriptor(),
                "The parameters " + format(parameters) + " for goal " + mojo.getRoleHint() + " are missing or invalid");

        this.mojo = mojo;

        this.parameters = parameters;
    }

class ValidatingConfigurationListener implements ConfigurationListener {
    private final Object mojo;

    private final ConfigurationListener delegate;

    private final Map<String, Parameter> missingParameters;

    ValidatingConfigurationListener(Object mojo, MojoDescriptor mojoDescriptor, ConfigurationListener delegate) {
        this.mojo = mojo;
        this.delegate = delegate;
        this.missingParameters = new HashMap<>();

        <forkId implementation="int" default-value="-1">${forkId}</forkId>
      </configuration>
    </mojo>
    <mojo>
      <goal>end-fork</goal>
      <description>Restore the non-fork currentProject instance, for use in the forking mojo.</description>
      <requiresDirectInvocation>false</requiresDirectInvocation>
      <requiresProject>false</requiresProject>

import java.util.List;

import org.apache.maven.execution.MavenSession;
import org.apache.maven.lifecycle.LifecycleExecutionException;

/**
 * Interface allows overriding default mojo execution strategy For example it is possible wrap some mojo execution to
 * decorate default functionality or skip some executions
 */
public interface MojosExecutionStrategy {

    /**
     * Entry point to the execution strategy
     *

     *
     * @return The current project or {@code null} if not applicable.
     */
    MavenProject getProject();

    /**
     * Gets the current mojo execution (if any).
     *
     * @return The current mojo execution or {@code null} if not applicable.
     */
    MojoExecution getMojoExecution();

    /**
     * Gets the exception that caused the event (if any).
     *

import javax.inject.Singleton;

import java.util.List;

import org.apache.maven.execution.MavenSession;
import org.apache.maven.lifecycle.LifecycleExecutionException;

/**
 * Default mojo execution strategy. It just iterates over mojo executions and runs one by one
 */
@Named
@Singleton
public class DefaultMojosExecutionStrategy implements MojosExecutionStrategy {
    @Override

/**
 * Extension point that allows build extensions observe and possibly veto mojo executions.
 * <p>
 * Unlike {@link org.apache.maven.execution.MojoExecutionListener}, this extension point does not
 * trigger instantiation of the component, hence "weak" class name prefix. Only applies to mojo execution
 * scoped components.
 * </p>

        msgs.add("*****************************************************************");
        msgs.add("* An aggregator Mojo is already executing in parallel build,    *");
        msgs.add("* but aggregator Mojos require exclusive access to reactor to   *");
        msgs.add("* prevent race conditions. This mojo execution will be blocked  *");
        msgs.add("* until the aggregator work is done.                            *");