# Core automation platform (core/execution)
platforms/core-execution/                                   @gradle/bt-cortex
platforms/core-execution/build-cache/                       @gradle/bt-cortex @gradle/dv-integrations-team
platforms/core-execution/build-cache-base/                  @gradle/bt-cortex @gradle/dv-integrations-team

import java.util.concurrent.atomic.AtomicReference;

import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.DefaultArtifact;
import org.apache.maven.execution.MavenExecutionRequest;
import org.apache.maven.execution.MavenExecutionResult;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.impl.resolver.MavenWorkspaceReader;
import org.apache.maven.project.MavenProject;
import org.apache.maven.project.MavenProjectHelper;

import org.apache.maven.di.Injector;
import org.apache.maven.execution.DefaultMavenExecutionRequest;
import org.apache.maven.execution.MavenExecutionRequest;
import org.apache.maven.execution.MavenExecutionRequestPopulator;
import org.apache.maven.execution.scope.internal.MojoExecutionScope;
import org.apache.maven.execution.scope.internal.MojoExecutionScopeModule;
import org.apache.maven.extension.internal.CoreExports;

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.lifecycle.internal.stub;

import org.apache.maven.execution.ExecutionEvent.Type;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.lifecycle.internal.ExecutionEventCatapult;
import org.apache.maven.plugin.MojoExecution;

/**
 */

  /* use AbstractService for state management */
  private final Service delegate =
      new AbstractService() {
        @Override
        protected final void doStart() {
          Executor executor = renamingDecorator(executor(), () -> serviceName());
          executor.execute(
              () -> {
                try {
                  startUp();
                  notifyStarted();

  <build>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <executions>
          <execution>
            <id>test</id>
            <phase>package</phase>
            <goals>
              <goal>compile</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>

 evaluate plugin parameters values during Mojo configuration,

 * <<<ExceptionHandler>>> component ({{{./apidocs/org/apache/maven/exception/ExceptionHandler.html}javadoc}}),
 with its <<<DefaultExceptionHandler>>> implementation
 ({{{./xref/org/apache/maven/exception/DefaultExceptionHandler.html}source}}), use to transform exception into useful end-user messages.

* Toolchains

 * {{{./toolchains.html}Toolchains descriptor reference}},

    /**
     * Returns a map of user-defined properties for the Maven execution.
     * These properties can be set using the -D command-line option.
     *
     * @return an unmodifiable map of user properties
     */
    @Nonnull
    Map<String, String> userProperties();

    /**
     * Returns a map of system properties for the Maven execution.

    /**
     * Looks up the mojo for the specified mojo execution and populates its parameters from the configuration given by
     * the mojo execution. The mojo/plugin descriptor associated with the mojo execution provides the class realm to
     * look up the mojo from. <strong>Warning:</strong> The returned mojo instance must be released via

import java.util.Arrays;
import java.util.List;

import org.apache.maven.execution.AbstractExecutionListener;
import org.apache.maven.execution.DefaultMavenExecutionRequest;
import org.apache.maven.execution.DefaultMavenExecutionResult;
import org.apache.maven.execution.MavenExecutionRequest;
import org.apache.maven.execution.MavenSession;
import org.apache.maven.execution.ProjectDependencyGraph;