import org.gradle.process.internal.JavaExecHandleBuilder;

import javax.inject.Inject;

public class JavaApplicationHandle implements DeploymentHandle {
    private final JavaExecHandleBuilder builder;
    private ExecHandle handle;

    @Inject
    public JavaApplicationHandle(JavaExecHandleBuilder builder) {
        this.builder = builder;
    }

    @Override
    public boolean isRunning() {

    public void startApplication() {
        System.out.println("serving docs at http://localhost:" + getPort().get());
        DeploymentRegistry registry = getDeploymentRegistry();
        JavaApplicationHandle handle = registry.get(getPath(), JavaApplicationHandle.class);
        if (handle == null) {
            JavaExecHandleBuilder builder = getExecActionFactory().newJavaExec();

        this.mainClassName = mainClassName;
    }

    @TaskAction
    public void startApplication() {
        DeploymentRegistry registry = getDeploymentRegistry();
        JavaApplicationHandle handle = registry.get(getPath(), JavaApplicationHandle.class);
        if (handle == null) {
            JavaExecHandleBuilder builder = getExecActionFactory().newJavaExec();
            builder.setExecutable(Jvm.current().getJavaExecutable());

Class <org.gradle.internal.deployment.JavaApplicationHandle> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (JavaApplicationHandle.java:0)
Class <org.gradle.internal.deployment.RunApplication> is not annotated (directly or via its package) with @org.gradle.api.NonNullApi in (RunApplication.java:0)