de.thtesche.udemy.controller.HelloController.java Source code

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Here is the source code for de.thtesche.udemy.controller.HelloController.java

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package de.thtesche.udemy.controller;

import de.thtesche.udemy.dao.TeamDao;
import de.thtesche.udemy.domain.Team;
import java.net.URI;
import java.util.List;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.client.RestTemplate;

/**
 *
 * @author thtesche
 */
@Controller
public class HelloController {

    private static final Logger logger = LoggerFactory.getLogger(HelloController.class);

    @Autowired
    TeamDao teamDao;

    @Autowired
    DiscoveryClient discoveryClient;

    @Value("${content}")
    String content;

    /**
     * Service specific content.
     *
     * @return configured value
     */
    @RequestMapping("/content")
    @ResponseBody
    String content() {
        return content;
    }

    @RequestMapping("/aggregate")
    @ResponseBody
    String aggregate() {

        // Old version. Usefull in case some one don't change the hostname
        //    List<String> lab04Instances
        //        = discoveryClient.getServices().stream().filter(service -> service.toLowerCase().startsWith("lab-04")).collect(Collectors.toList());
        StringBuilder result = new StringBuilder();
        String delimiter = " - ";

        // Call every registered instance
        List<ServiceInstance> instances = discoveryClient.getInstances("lab-04");
        for (ServiceInstance instance : instances) {
            URI uri = instance.getUri();
            if (uri != null) {
                result.append((new RestTemplate()).getForObject(uri + "/content", String.class));
                result.append(delimiter);
            }
        }
        // remove the last delimiter too
        return result.toString().replaceFirst(delimiter + "$", "");
    }

    @RequestMapping("/hi/{name}")
    public String hiThere(Map model, @PathVariable String name) {
        model.put("name", name);
        return "hello";
    }

    @RequestMapping("/api")
    public @ResponseBody List<Team> api() {
        return teamDao.findAll();
    }

}