Develop Reference

HandlerInterceptor is not working with Api Gateway Zuul

I am trying to implement Bucket4J rate limiter in Netflix Zuul Api Gateway. I have added Interceptor for Rate Limiting the requests using WebMvcConfigurer.
package com.rajkumar.apiigateway;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.cloud.netflix.zuul.EnableZuulProxy;
import org.springframework.context.annotation.Lazy;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import com.rajkumar.apiigateway.ratelimit.interceptor.RateLimitInterceptor;
#SpringBootApplication
#EnableZuulProxy
public class ApiiGatewayApplication implements WebMvcConfigurer{
#Autowired
#Lazy
RateLimitInterceptor rateLimitInterceptor;
public static void main(String[] args) {
new SpringApplicationBuilder(ApiiGatewayApplication.class)
.run(args);
}
#Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(rateLimitInterceptor)
.addPathPatterns("/api/service_1/throttling/users");
}
}
And Interceptor for rate limiting looks like
package com.rajkumar.apiigateway.ratelimit.interceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import com.rajkumar.apiigateway.ratelimit.service.RateLimitService;
import io.github.bucket4j.Bucket;
import io.github.bucket4j.ConsumptionProbe;
#Component
public class RateLimitInterceptor implements HandlerInterceptor {
private static final String HEADER_API_KEY = "X-API-KEY";
private static final String HEADER_LIMIT_REMAINING = "X-RATE-LIMIT-REMAINING";
private static final String HEADER_RETRY_AFTER = "X-RATE-LIMIT-RETRY-AFTER-SECONDS";
#Autowired
RateLimitService rateLimitService;
#Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception {
String apiKey = request.getHeader(HEADER_API_KEY);
if(apiKey == null || apiKey.isEmpty()) {
response.sendError(HttpStatus.OK.value(), HEADER_API_KEY+" request header is mandatory");
return false;
}
Bucket tokenBucket = rateLimitService.resolveBucket(request.getHeader(HEADER_API_KEY));
ConsumptionProbe probe = tokenBucket.tryConsumeAndReturnRemaining(1);
if(probe.isConsumed()) {
response.addHeader(HEADER_LIMIT_REMAINING, Long.toString(probe.getRemainingTokens()));
return true;
}
response.addHeader(HEADER_RETRY_AFTER, Long.toString(probe.getNanosToWaitForRefill()/1000000000));
response.sendError(HttpStatus.TOO_MANY_REQUESTS.value(),"You have exceeded your request limit");
return false;
}
}
and other dependent component
package com.rajkumar.apiigateway.ratelimit.service;
import java.util.concurrent.TimeUnit;
import org.springframework.stereotype.Component;
import com.github.benmanes.caffeine.cache.Caffeine;
import com.github.benmanes.caffeine.cache.LoadingCache;
import com.rajkumar.apiigateway.ratelimit.RateLimit;
import io.github.bucket4j.Bucket;
import io.github.bucket4j.Bucket4j;
#Component
public class RateLimitService {
private LoadingCache<String, Bucket> cache = Caffeine.newBuilder()
.expireAfterWrite(1, TimeUnit.MINUTES)
.build(this::newBucket);
public Bucket resolveBucket(String apiKey) {
return cache.get(apiKey);
}
private Bucket newBucket(String apiKey) {
RateLimit plan = RateLimit.resolvePlanFromApiKey(apiKey);
Bucket bucket = Bucket4j.builder()
.addLimit(plan.getLimit())
.build();
return bucket;
}
}
package com.rajkumar.apiigateway.ratelimit;
import java.time.Duration;
import io.github.bucket4j.Bandwidth;
import io.github.bucket4j.Refill;
public enum RateLimit {
FREE(2L),
BASIC(4L),
PROFESSIONAL(10L);
private Long tokens;
private RateLimit(Long tokens) {
this.tokens = tokens;
}
public static RateLimit resolvePlanFromApiKey(String apiKey) {
if(apiKey==null || apiKey.isEmpty()) {
return FREE;
}
else if(apiKey.startsWith("BAS-")) {
return BASIC;
}
else if(apiKey.startsWith("PRO-")) {
return PROFESSIONAL;
}
return FREE;
}
public Bandwidth getLimit() {
return Bandwidth.classic(tokens, Refill.intervally(tokens, Duration.ofMinutes(1)));
}
}
and pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.4.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.rajkumar</groupId>
<artifactId>apii-gateway</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>apii-gateway</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Hoxton.SR8</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-zuul</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>com.github.ben-manes.caffeine</groupId>
<artifactId>caffeine</artifactId>
<!-- <version>2.5.5</version> -->
</dependency>
<dependency>
<groupId>com.github.vladimir-bukhtoyarov</groupId>
<artifactId>bucket4j-core</artifactId>
<version>4.10.0</version>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
and application.properties
server.port = 8080
spring.application.name = api-gateway
#routing for service 1
zuul.routes.service_1.path = /api/service_1/**
zuul.routes.service_1.url = http://localhost:8081/
#routing for service 2
zuul.routes.service_2.path = /api/service_2/**
zuul.routes.service_2.url = http://localhost:8082/
When I am trying to hit api gateway (http://localhost:8080/api/service_1/throttling/users): it is not passing through the interceptor. Any help is appreciated.
Thanks in advance.

Resteasy returns 404

I'm totally new to Resteasy and still learning how it works.
But I cannot work this code out.
I start the tomcat server and it should return fake users information, but somehow gets 404. (No error shown to Eclipse.) I already googled to figure out why this code doesn't work but I couldn't.
To get all users, the URI should be http://localhost:8080/api/v1/users
package com.demo.sprintSample.config;
import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;
import org.springframework.context.annotation.Configuration;
#Configuration
#ApplicationPath("/")
public class ResteasyConfig extends Application {
}
package com.demo.sprintSample.resource;
import java.util.List;
import java.util.Optional;
import java.util.UUID;
import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Response;
import javax.ws.rs.ext.Provider;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestBody;
import com.demo.sprintSample.model.User;
import com.demo.sprintSample.service.UserService;
#Component
#Path("/api/v1/users")
public class UserResourceResteasy {
private UserService userService;
#Autowired
public UserResourceResteasy(UserService userService) {
this.userService = userService;
}
#GET
#Produces("application/json")
public List<User> getAllUsers() {
return userService.getAllUsers();
}
#GET
#Path("{userUid}")
#Produces("application/json")
public Response fetchUser(#PathParam("userUid") UUID userUid) {
Optional<User> userOptional = userService.getUser(userUid);
if(userOptional.isPresent()) {
return Response.ok(userOptional.get()).build();
}
return Response.status(Response.Status.NOT_FOUND)
.entity(new ErrorMessage("user"+userUid+"was not found."))
.build();
}
#POST
#Consumes("application/json")
#Produces("application/json")
public Response insertNewUser(#RequestBody User user) {
UUID uid = UUID.randomUUID();
int result = userService.insertUser(user);
return getIntegerResponseEntity(result);
}
#PUT
#Consumes("application/json")
#Produces("application/json")
public Response updateUser(#RequestBody User user) {
int result = userService.updateUser(user);
return getIntegerResponseEntity(result);
}
#DELETE
#Path("{userUid}")
public Response deleteUser(#PathParam("userUid") UUID userUid) {
int result =userService.removeUser(userUid);
return getIntegerResponseEntity(result);
}
private Response getIntegerResponseEntity(int result) {
if(result == 1) {
return Response.ok().build();
}
return Response.status(Response.Status.BAD_REQUEST).build();
}
}
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.demo</groupId>
<artifactId>sprintSample</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>sprintSample</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<rest.easy.client.version>4.5.6.Final</rest.easy.client.version>
</properties>
<dependencies>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>2.21.0</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>29.0-jre</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxrs</artifactId>
<version>3.0.2.Final</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxb-provider</artifactId>
<version>3.0.2.Final</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>jaxrs-api</artifactId>
<version>3.0.2.Final</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-client</artifactId>
<version>3.0.2.Final</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jersey</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

Spring can't find Service or Repository beans to Autowire

I'm trying to run spring boot with spring data as basically as possible with swing.
However, even though all seems to be properly configured, when I try to run it, I get an error message saying it couldn't find my Service bean.
package db.westworld.dao;
import db.westworld.entities.RobotEntity;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;
#Repository
public interface RobotRepository extends CrudRepository<RobotEntity, Integer> {
}
package db.westworld.service;
import db.westworld.entities.RobotEntity;
import java.util.Optional;
public interface IRobotService {
Optional<RobotEntity> findById(int id);
}
package db.westworld.service;
import db.westworld.dao.RobotRepository;
import db.westworld.entities.RobotEntity;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.Optional;
#Service
public class RobotService implements IRobotService {
private final RobotRepository robotRepository;
#Autowired
RobotService(RobotRepository robotRepository) {
this.robotRepository = robotRepository;
}
#Override
public Optional<RobotEntity> findById(int id) {
return robotRepository.findById(id);
}
public void saveRobot(RobotEntity robot) {
robotRepository.save(robot);
}
}
package db.westworld;
import db.westworld.view.RegisterRobot;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import java.awt.*;
#SpringBootApplication
public class WestworldApplication {
public static void main(String[] args) {
var ctx = new SpringApplicationBuilder(RegisterRobot.class).headless(false).run(args);
EventQueue.invokeLater(() -> {
var ex = ctx.getBean(RegisterRobot.class);
ex.setVisible(true);
});
}
}
package db.westworld.view;
import db.westworld.entities.RobotEntity;
import db.westworld.service.RobotService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import javax.swing.*;
import java.awt.event.*;
import java.util.Date;
#Controller
public class RegisterRobot extends JDialog {
private RobotService robotService;
#Autowired
public void setRobotService (RobotService robotService) {
this.robotService = robotService;
}
private void onOK() {
RobotEntity robot = new RobotEntity();
robot.setCreatedAt(new Date());
robot.setId(1);
robotService.saveRobot(robot);
dispose();
}
}
Error message:
Parameter 0 of method setRobotService in db.westworld.view.RegisterRobot required a bean of type 'db.westworld.service.RobotService' that could not be found.
Action:
Consider defining a bean of type 'db.westworld.service.RobotService' in your configuration.
(the JDialog implementation just includes the basics)
The same also happens when I try to autowire the repository.
Also, in case needed, here's my pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent> <groupId>db</groupId>
<artifactId>westworld</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>westworld</name>
<description>westworldSpringBoot</description>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>javax.inject</groupId>
<artifactId>javax.inject</artifactId>
<version>1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>

The parameter to new SpringApplicationBuilder() must be the class annotate with #SpringBootApplication, as shown in every Spring Boot example I've ever seen, e.g. Create an Application class in the "Getting Started - Building an Application with Spring Boot" guide.

WebSocket with embedded Tomcat is 404

I made two classes:
Main class with embedded Tomcat(8.5.20)
ServerEndpoint of Websocket
I run the main class on IntelliJ IDEA
and run this JavaScript: new WebSocket('ws://localhost:8080/ws')
in the console of Google Chrome.
I expected the response code is 200, but actually it is 404.
How can I fix this?
Main class:
package webapp;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.startup.Tomcat;
import javax.servlet.ServletException;
import java.io.File;
public class Main {
private static final String STATIC_DIR = "src/main/static/";
public static void main(String[] args) throws ServletException, LifecycleException {
Tomcat tomcat = new Tomcat();
tomcat.setPort(8080);
File staticDir = new File(STATIC_DIR);
tomcat.addWebapp("/", staticDir.getAbsolutePath());
tomcat.start();
tomcat.getServer().await();
}
}
ServerEndpoint:
package webapp.websocket;
import javax.websocket.OnClose;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.ServerEndpoint;
#ServerEndpoint("/ws")
public class SampleWebSocket {
#OnOpen
public void onOpen(Session session) {
System.out.println("open");
}
#OnClose
public void onClose(Session session) {
System.out.println("close");
}
#OnMessage
public String onMessage(String text) {
System.out.println("message:" + text);
return "Server:" + text;
}
}
Thank you.

I found a solution.
This question is dupricated.
I read Got 404 error on tomcat 7.0.47 websocket and editted my pom.xml.
Following is the whole of my pom.xml.
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>websocket-sample</artifactId>
<version>1.0.0-SNAPSHOT</version>
<name>websocket-sample</name>
<properties>
<java.version>1.8</java.version>
<maven.compiler.target>${java.version}</maven.compiler.target>
<maven.compiler.source>${java.version}</maven.compiler.source>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-core</artifactId>
<version>8.5.20</version>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-websocket</artifactId>
<version>8.5.20</version>
</dependency>
<dependency>
<groupId>javax.websocket</groupId>
<artifactId>javax.websocket-api</artifactId>
<version>1.1</version>
</dependency>
</dependencies>
</project>

Just add the following dependency to pom.xml
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-websocket</artifactId>
<version>8.5.20</version>
</dependency>

What solved the issue for me was switching from the javax.websocket-api dependency to the Tomcat-specific tomcat-embed-websocket dependency instead and switching all my imports (ServerEndpoint, onMessage, etc.) to the Tomcat-specific jakarta.websocket.* packages instead of the javax.websocket.x packages.
Here is the endpoint code that worked for me -- notice that there are no javax.websocket imports and instead I have jakarta.websocket imports:
import java.io.IOException;
import jakarta.websocket.EncodeException;
import jakarta.websocket.OnMessage;
import jakarta.websocket.Session;
import jakarta.websocket.server.ServerEndpoint;
#ServerEndpoint("/echo")
public class EchoEndpoint {
// Implementation.
#OnMessage
public void onMessage(
Session session,
String message)
throws
IOException,
EncodeException {
// Send the same message back.
session.getBasicRemote().sendText(message);
}
}
And my pom.xml file dependencies:
<!-- https://mvnrepository.com/artifact/org.apache.tomcat.embed/tomcat-embed-core -->
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-core</artifactId>
<version>10.1.0-M8</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.tomcat.embed/tomcat-embed-websocket -->
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<artifactId>tomcat-embed-websocket</artifactId>
<version>10.1.0-M8</version>
</dependency>
As far as I can tell, the pom.xml should not contain the javax.websocket dependency at all, to ensure there are no collisions/clashes between that one and the Tomcat-specific tomcat-embed-websocket dependency.

Vaadin, SpringBoot and Jersey get request returns 404

it is my first post here, till now I finally always found the solution for my dev problem, but now I am really exchausted. Maybe you can help me.
I am trying to setup simple Rest get web app basing on vaadin + spring boot +
maven on tomcat. In some combinations in .pom i received the get response : "sth else" but in such case the vaadin ui wasnt loaded. In such configuration I paste below I cannot obtain the get response:
pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.drzinks</groupId>
<artifactId>site</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>Site</name>
<description>CRUD Vaadin Spring App</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.2.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<vaadin.version>7.7.3</vaadin.version>
<vaadin.plugin.version>7.7.3</vaadin.plugin.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-spring-boot-starter</artifactId>
<version>1.1.0</version>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<!-- in order to have hot deploy in tomcat -->
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jersey</artifactId>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>com.vaadin</groupId>
<artifactId>vaadin-bom</artifactId>
<version>7.7.3</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
web.xml:
<web-app version="3.0"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<!-- Servlet declaration can be omitted in which case
it would be automatically added by Jersey -->
<servlet>
<servlet-name>javax.ws.rs.core.Application</servlet-name>
</servlet>
<servlet-mapping>
<servlet-name>javax.ws.rs.core.Application</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
</web-app>
WelcomeController.java:
package com.drzinks;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import org.springframework.stereotype.Component;
#Component
#Path("/sth")
public class WelcomeController {
#GET
#Produces("text/plain")
public String getSthElse(){
return "sth elese";
}
}
SiteApplication:
package com.drzinks;
import javax.ws.rs.ApplicationPath;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class SiteApplication {
public static void main(String[] args) {
SpringApplication.run(SiteApplication.class, args);
}
}
SiteUI.java:
package com.drzinks;
import org.springframework.beans.factory.annotation.Autowired;
import com.vaadin.annotations.Theme;
import com.vaadin.server.VaadinRequest;
import com.vaadin.spring.annotation.SpringUI;
import com.vaadin.ui.Label;
import com.vaadin.ui.UI;
import com.vaadin.ui.VerticalLayout;
#SpringUI
#Theme("valo")
public class SiteUI extends UI {
#Autowired
private RestClient restClient;
private VerticalLayout layout;
#Override
protected void init(VaadinRequest request) {
setupLayout();
addHeader();
}
private void setupLayout() {
layout = new VerticalLayout(); //alt shift l extr local var
setContent(layout);
}
private void addHeader() {
// Label label1 = new Label(welcomeController.returnSth());
// layout.addComponent(label1);
Label label2 = new Label(restClient.getSthFromServer());
// Label label2 = new Label("restClient.getSthFromServer()");
layout.addComponent(label2);
}
}
RestClient.java:
package com.drzinks;
import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.WebTarget;
import javax.ws.rs.core.MediaType;
import org.springframework.stereotype.Component;
import com.vaadin.spring.annotation.UIScope;
#UIScope
#Component
public class RestClient {
private Client client = ClientBuilder.newClient();
private WebTarget webtarget = client.target("http://localhost:8080");
public String getSthFromServer() {
String response;
response = webtarget.path("sth")
.request().get(String.class);
return response;
}
}
folder_structure
If anyone could help, I would be very appreciated as I spent on this more than 12 hrs, breaking all night..