Play internals to handle a request.

Foo.java

public class Foo {
    public static void main(String[] args) {
        play.Environment env = play.Environment.simple();
        play.ApplicationLoader.Context context = play.ApplicationLoader.create(env);

        // Keep in mind that plays expects that configuration
        // play.application.loader is defined. Otherwise an error
        // is raised.
        play.api.ApplicationLoader loader = play.api.ApplicationLoader$.MODULE$.apply(context.underlying());

        play.api.Application application = loader.load(context.underlying());
        play.core.ApplicationProvider applicationProvider = play.core.ApplicationProvider$.MODULE$.apply(application);

        scala.Option<play.api.mvc.Result> resultOption = applicationProvider.handleWebCommand(fromAwsRequestToPlayRequest());
        
        if (resultOption.isDefined()) {
            // application was able to handle the result
            play.api.mvc.Result result = resultOption.get();
        } else {
            // no handler was found
            play.api.mvc.Result result = play.api.mvc.Results$.MODULE$.NotFound();
        }
    }

    // This would translate from AWS Lambda request to a Play request.
    private static play.api.mvc.RequestHeader fromAwsRequestToPlayRequest() {
        return null;
    }
}