How to create actions on google using Spring Boot & Java Library

Question

I am trying to create actions on google using Spring Boot & Dialogflow. In which I was trying to use the available java library https://github.com/actions-on-google/actions-on-google-java

But couldn't understand how should I implement these annotations in my Spring Boot Application. Eg: @ForIntent

I have tried the boilerplate code with App Engine entry point https://github.com/actions-on-google/dialogflow-webhook-boilerplate-java I was able to run this code, but couldn't understand its implementation in Spring boot Application.

In Spring Boot: We use @RestController in the application to map the requests

But with actions on google there would be only one request link, we can provide as Fulfillment webhook. So where should I use the @ForIntent in my code to identify the Intent and change Request body & Response body.

Answer 1

I actually did this at one point, and based it off of the Silly Name Maker sample. I based it on one of the Spring Boot canonical samples, so I'm not going to guarantee this is 'optimal', but it's a pretty clean implementation.

You can keep the SillyNameMakerApp the same, unmodified. Instead of the ActionsServlet, you can create a Spring Boot wrapper like this:

@SpringBootApplication
public class HelloworldApplication {
    private static final Logger LOG = LoggerFactory.getLogger(SillyNameMakerApp.class);
    private final App actionsApp = new SillyNameMakerApp();

    @Value("${TARGET:World}")
    String message;

    @RestController
    class HelloworldController {
        @GetMapping("/")
        String serveAck() {
            return "App is listening but requires valid POST request to respond with Action response.";
        }

        @RequestMapping(value = "/", method = RequestMethod.POST, produces = { "application/json" })
        String serveAction(@RequestBody String body, @RequestHeader Map<String, String> headers) {
            try {
                return actionsApp.handleRequest(body, headers).get();
            } catch (InterruptedException | ExecutionException e) {
                return handleError(e);
            }
        }

        private String handleError(Exception e) {
            e.printStackTrace();
            LOG.error("Error in App.handleRequest ", e);
            return "Error handling the intent - " + e.getMessage();
        }
    }

    public static void main(String[] args) {
        SpringApplication.run(HelloworldApplication.class, args);
    }
}