Merge pull request #11857 from eugenp/BAEL-5336-v2
remove duplicate code from old module BAEL-5336
This commit is contained in:
Loredana Crusoveanu
GitHub
commit
c591c1d448
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### Relevant Articles:
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- [Spring @Autowired Field Null – Common Causes and Solutions](https://www.baeldung.com/spring-autowired-field-null)
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<artifactId>spring-5-autowiring-beans</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<name>spring-5-autowiring-beans</name>
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<parent>
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<groupId>com.baeldung</groupId>
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<artifactId>parent-boot-2</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<relativePath>../parent-boot-2</relativePath>
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</parent>
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<dependencies>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-web</artifactId>
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</dependency>
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</dependencies>
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</project>
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package com.baeldung.autowiring;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.context.annotation.ComponentScan;
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@SpringBootApplication
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public class App {
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public static void main(String[] args) {
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SpringApplication.run(App.class, args);
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}
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}
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package com.baeldung.autowiring.controller;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Controller;
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import com.baeldung.autowiring.service.MyService;
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@Controller
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public class CorrectController {
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@Autowired
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MyService myService;
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public String control() {
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return myService.serve();
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}
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}
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package com.baeldung.autowiring.controller;
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import org.springframework.stereotype.Controller;
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import com.baeldung.autowiring.service.MyService;
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@Controller
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public class FlawedController {
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public String control() {
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MyService userService = new MyService();
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return userService.serve();
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}
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}
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package com.baeldung.autowiring.service;
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import org.springframework.stereotype.Component;
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@Component
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public class MyComponent {
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public void doWork() {}
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}
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package com.baeldung.autowiring.service;
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import org.springframework.beans.factory.annotation.Autowired;
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/**
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* The bean corresponding to this class is defined in MyServiceConfiguration
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* Alternatively, you could choose to decorate this class with @Component or @Service
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*/
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public class MyService {
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@Autowired
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MyComponent myComponent;
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public String serve() {
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myComponent.doWork();
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return "success";
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}
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}
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package com.baeldung.autowiring.service;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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@Configuration
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public class MyServiceConfiguration {
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@Bean
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MyService myService() {
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return new MyService();
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}
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}
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@ -1,23 +0,0 @@
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package com.baeldung.autowiring.controller;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.api.extension.ExtendWith;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.test.context.SpringBootTest;
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import org.springframework.test.context.junit.jupiter.SpringExtension;
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import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
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@ExtendWith(SpringExtension.class)
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@SpringBootTest
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public class CorrectControllerIntegrationTest {
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@Autowired
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CorrectController controller;
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@Test
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void whenControl_ThenRunSuccessfully() {
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assertDoesNotThrow(() -> controller.control());
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}
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}
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package com.baeldung.autowiring.controller;
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.api.extension.ExtendWith;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.test.context.SpringBootTest;
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import org.springframework.test.context.junit.jupiter.SpringExtension;
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import static org.junit.jupiter.api.Assertions.assertThrows;
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@ExtendWith(SpringExtension.class)
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@SpringBootTest
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public class FlawedControllerIntegrationTest {
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private static final Logger LOGGER = LoggerFactory.getLogger(FlawedControllerIntegrationTest.class);
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@Autowired
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FlawedController myController;
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@Test
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void whenControl_ThenThrowNullPointerException() {
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NullPointerException npe = assertThrows(NullPointerException.class, () -> myController.control());
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LOGGER.error("Got a NullPointerException", npe);
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}
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}
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