@Input
    protected abstract Property<Integer> getPort();

    @Nested
    protected abstract Property<JavaLauncher> getJavaLauncher();

    @TaskAction
    public void startApplication() {
        System.out.println("serving docs at http://localhost:" + getPort().get());
        DeploymentRegistry registry = getDeploymentRegistry();

        return mainClassName;
    }

    public void setMainClassName(String mainClassName) {
        this.mainClassName = mainClassName;
    }

    @TaskAction
    public void startApplication() {
        DeploymentRegistry registry = getDeploymentRegistry();
        JavaApplicationHandle handle = registry.get(getPath(), JavaApplicationHandle.class);
        if (handle == null) {