<executions>
          <execution>
            <id>default-compile</id>
            <configuration>
              <compilerArgs combine.children="append" combine.self="append">
                <arg>-XDignore.symbol.file</arg>
              </compilerArgs>
            </configuration>
          </execution>
          <execution>
            <id>compile-java9</id>

     * method is called on a new/empty execution request before the caller mutates it to fit its needs.
     *
     * @param request The execution request to populate, must not be {@code null}.
     * @param toolchains The toolchains to copy into the execution request, may be {@code null}.
     * @return The populated execution request, never {@code null}.

public enum PhaseExecutionPoint {
    /**
     * Execution must occur before any executions of the phase proper. Failure of any {@code #BEFORE} dynamic phase
     * execution will prevent the {@link #AT} phase but will not prevent any {@link #AFTER} dynamic phases.
     */
    BEFORE("before:"),
    /**
     * Execution is the execution of the phase proper. Failure of any {@code #AT} dynamic phase execution will fail

        <executions>
          <execution>
            <id>default-compile</id>
            <configuration>
              <compilerArgs combine.children="append" combine.self="append">
                <arg>-XDignore.symbol.file</arg>
              </compilerArgs>
            </configuration>
          </execution>
          <execution>
            <id>compile-java9</id>

                }

                PluginExecution execution = new PluginExecution();
                execution.setId(getExecutionId(plugin, gs.goal));
                execution.setPhase(phase);
                execution.setPriority(i - mojos.size());
                execution.getGoals().add(gs.goal);

                execution.setLocation("", location);
                execution.setLocation("id", location);

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
     *

    /**
     * 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).
     *
     * @return The exception or {@code null} if none.
     */
    Exception getException();

 * under the License.
 */
package org.apache.maven.execution.scope;

import org.apache.maven.execution.MojoExecutionEvent;
import org.apache.maven.plugin.MojoExecutionException;

/**
 * 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

/**
 * Provides context for mojo execution. Invocation of {@link #run(MojoExecution)} will result in actual execution
 */
public interface MojoExecutionRunner {
    /**
     * Runs mojo execution
     *
     * @param execution mojo execution
     * @throws LifecycleExecutionException
     */
    void run(MojoExecution execution) throws LifecycleExecutionException;

              <templates>
                <template>model-v3.vm</template>
              </templates>
            </configuration>
          </execution>
          <execution>
            <id>modello-site-docs</id>
            <phase>none</phase>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <groupId>com.github.siom79.japicmp</groupId>
        <artifactId>japicmp-maven-plugin</artifactId>