JAVA-628: Moved 3 articles to spring-core-4

spring-core-4/README.md

@@ -8,4 +8,7 @@ This module contains articles about core Spring functionality
 - [How to dynamically Autowire a Bean in Spring](https://www.baeldung.com/spring-dynamic-autowire)
 - [Spring @Import Annotation](https://www.baeldung.com/spring-import-annotation)
 - [Spring BeanPostProcessor](https://www.baeldung.com/spring-beanpostprocessor)
+- [Using @Autowired in Abstract Classes](https://www.baeldung.com/spring-autowired-abstract-class)
+- [Running Setup Data on Startup in Spring](https://www.baeldung.com/running-setup-logic-on-startup-in-spring)
+- [Constructor Injection in Spring with Lombok](https://www.baeldung.com/spring-injection-lombok)
 - More articles: [[<-- prev]](/spring-core-3)

spring-core-4/pom.xml

@@ -29,6 +29,11 @@
             <artifactId>spring-expression</artifactId>
             <version>${spring.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>${lombok.version}</version>
+        </dependency>
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>

spring-core-4/src/main/java/com/baeldung/lombok/ApologizeService.java

@@ -0,0 +1,22 @@
+package com.baeldung.lombok;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component
+@RequiredArgsConstructor
+public class ApologizeService {
+
+    private final Translator translator;
+    private final String message;
+
+    @Autowired
+    public ApologizeService(Translator translator) {
+        this(translator, "sorry");
+    }
+
+    public String apologize() {
+        return translator.translate(message);
+    }
+}

spring-core-4/src/main/java/com/baeldung/lombok/FarewellService.java

@@ -0,0 +1,18 @@
+package com.baeldung.lombok;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component
+public class FarewellService {
+
+    private final Translator translator;
+
+    public FarewellService(Translator translator) {
+        this.translator = translator;
+    }
+
+    public String farewell() {
+        return translator.translate("bye");
+    }
+}

spring-core-4/src/main/java/com/baeldung/lombok/GreetingService.java

@@ -0,0 +1,15 @@
+package com.baeldung.lombok;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component
+public class GreetingService {
+
+    @Autowired
+    private Translator translator;
+
+    public String greet() {
+        return translator.translate("hello");
+    }
+}

spring-core-4/src/main/java/com/baeldung/lombok/ThankingService.java

@@ -0,0 +1,15 @@
+package com.baeldung.lombok;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+
+@Component
+@RequiredArgsConstructor
+public class ThankingService {
+
+    private final Translator translator;
+
+    public String thank() {
+        return translator.translate("thank you");
+    }
+}

spring-core-4/src/main/java/com/baeldung/lombok/Translator.java

@@ -0,0 +1,5 @@
+package com.baeldung.lombok;
+
+public interface Translator {
+    String translate(String input);
+}

spring-core-4/src/main/java/com/baeldung/sampleabstract/BallService.java

@@ -0,0 +1,28 @@
+package com.baeldung.sampleabstract;
+
+import org.springframework.beans.factory.annotation.Autowired;
+
+import javax.annotation.PostConstruct;
+
+public abstract class BallService {
+
+    private RuleRepository ruleRepository;
+
+    private LogRepository logRepository;
+
+    public BallService(RuleRepository ruleRepository) {
+        this.ruleRepository = ruleRepository;
+    }
+
+    @Autowired
+    public final void setLogRepository(LogRepository logRepository) {
+        this.logRepository = logRepository;
+    }
+
+    @PostConstruct
+    public void afterInitialize() {
+
+        System.out.println(ruleRepository.toString());
+        System.out.println(logRepository.toString());
+    }
+}

spring-core-4/src/main/java/com/baeldung/sampleabstract/BasketballService.java

@@ -0,0 +1,13 @@
+package com.baeldung.sampleabstract;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component
+public class BasketballService extends BallService {
+
+    @Autowired
+    public BasketballService(RuleRepository ruleRepository) {
+        super(ruleRepository);
+    }
+}

spring-core-4/src/main/java/com/baeldung/sampleabstract/DemoApp.java

@@ -0,0 +1,18 @@
+package com.baeldung.sampleabstract;
+
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@ComponentScan(basePackages = "com.baeldung.sampleabstract")
+public class DemoApp {
+
+
+    public static void main(String[] args) {
+
+        ApplicationContext applicationContext = new AnnotationConfigApplicationContext(DemoApp.class);
+    }
+
+}

spring-core-4/src/main/java/com/baeldung/sampleabstract/LogRepository.java

@@ -0,0 +1,12 @@
+package com.baeldung.sampleabstract;
+
+import org.springframework.stereotype.Component;
+
+@Component
+public class LogRepository {
+
+    @Override
+    public String toString() {
+        return "logRepository";
+    }
+}

spring-core-4/src/main/java/com/baeldung/sampleabstract/RuleRepository.java

@@ -0,0 +1,12 @@
+package com.baeldung.sampleabstract;
+
+import org.springframework.stereotype.Component;
+
+@Component
+public class RuleRepository {
+
+    @Override
+    public String toString() {
+        return "ruleRepository";
+    }
+}

spring-core-4/src/main/java/com/baeldung/startup/AllStrategiesExampleBean.java

@@ -0,0 +1,35 @@
+package com.baeldung.startup;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.springframework.beans.factory.InitializingBean;
+import org.springframework.context.annotation.Scope;
+import org.springframework.stereotype.Component;
+
+import javax.annotation.PostConstruct;
+
+@Component
+@Scope(value = "prototype")
+public class AllStrategiesExampleBean implements InitializingBean {
+
+    private static final Logger LOG = LoggerFactory.getLogger(AllStrategiesExampleBean.class);
+
+    public AllStrategiesExampleBean() {
+        LOG.info("Constructor");
+    }
+
+    @Override
+    public void afterPropertiesSet() throws Exception {
+        LOG.info("InitializingBean");
+    }
+
+    @PostConstruct
+    public void postConstruct() {
+        LOG.info("PostConstruct");
+    }
+
+    public void init() {
+        LOG.info("init-method");
+    }
+}

spring-core-4/src/main/java/com/baeldung/startup/EventListenerExampleBean.java

@@ -0,0 +1,21 @@
+package com.baeldung.startup;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.springframework.context.event.ContextRefreshedEvent;
+import org.springframework.context.event.EventListener;
+import org.springframework.stereotype.Component;
+
+@Component
+public class EventListenerExampleBean {
+    private static final Logger LOG = LoggerFactory.getLogger(EventListenerExampleBean.class);
+
+    public static int counter;
+
+    @EventListener
+    public void onApplicationEvent(ContextRefreshedEvent event) {
+        LOG.info("Increment counter");
+        counter++;
+    }
+}

spring-core-4/src/main/java/com/baeldung/startup/InitMethodExampleBean.java

@@ -0,0 +1,24 @@
+package com.baeldung.startup;
+
+import java.util.Arrays;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Scope;
+import org.springframework.core.env.Environment;
+import org.springframework.stereotype.Component;
+
+@Component
+@Scope(value = "prototype")
+public class InitMethodExampleBean {
+
+    private static final Logger LOG = LoggerFactory.getLogger(InitMethodExampleBean.class);
+
+    @Autowired
+    private Environment environment;
+
+    public void init() {
+        LOG.info("Env Default Profiles", Arrays.asList(environment.getDefaultProfiles()));
+    }
+}

spring-core-4/src/main/java/com/baeldung/startup/InitializingBeanExampleBean.java

@@ -0,0 +1,26 @@
+package com.baeldung.startup;
+
+import java.util.Arrays;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.InitializingBean;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Scope;
+import org.springframework.core.env.Environment;
+import org.springframework.stereotype.Component;
+
+@Component
+@Scope(value = "prototype")
+public class InitializingBeanExampleBean implements InitializingBean {
+
+    private static final Logger LOG = LoggerFactory.getLogger(InitializingBeanExampleBean.class);
+
+    @Autowired
+    private Environment environment;
+
+    @Override
+    public void afterPropertiesSet() throws Exception {
+        LOG.info("Env Default Profiles", Arrays.asList(environment.getDefaultProfiles()));
+    }
+}

spring-core-4/src/main/java/com/baeldung/startup/InvalidInitExampleBean.java

@@ -0,0 +1,18 @@
+package com.baeldung.startup;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Scope;
+import org.springframework.core.env.Environment;
+import org.springframework.stereotype.Component;
+
+@Component
+@Scope("prototype")
+public class InvalidInitExampleBean {
+
+    @Autowired
+    private Environment environment;
+
+    public InvalidInitExampleBean() {
+        environment.getActiveProfiles();
+    }
+}

spring-core-4/src/main/java/com/baeldung/startup/LogicInConstructorExampleBean.java

@@ -0,0 +1,22 @@
+package com.baeldung.startup;
+
+import java.util.Arrays;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Scope;
+import org.springframework.core.env.Environment;
+import org.springframework.stereotype.Component;
+
+@Component
+@Scope(value = "prototype")
+public class LogicInConstructorExampleBean {
+
+    private static final Logger LOG = LoggerFactory.getLogger(LogicInConstructorExampleBean.class);
+
+    @Autowired
+    public LogicInConstructorExampleBean(Environment environment) {
+        LOG.info("Env Default Profiles", Arrays.asList(environment.getDefaultProfiles()));
+    }
+}

spring-core-4/src/main/java/com/baeldung/startup/PostConstructExampleBean.java

@@ -0,0 +1,27 @@
+package com.baeldung.startup;
+
+import java.util.Arrays;
+
+import javax.annotation.PostConstruct;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Scope;
+import org.springframework.core.env.Environment;
+import org.springframework.stereotype.Component;
+
+@Component
+@Scope(value = "prototype")
+public class PostConstructExampleBean {
+
+    private static final Logger LOG = LoggerFactory.getLogger(PostConstructExampleBean.class);
+
+    @Autowired
+    private Environment environment;
+
+    @PostConstruct
+    public void init() {
+        LOG.info("Env Default Profiles", Arrays.asList(environment.getDefaultProfiles()));
+    }
+}

spring-core-4/src/main/java/com/baeldung/startup/SpringStartupConfig.java

@@ -0,0 +1,9 @@
+package com.baeldung.startup;
+
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@ComponentScan("com.baeldung.startup")
+public class SpringStartupConfig {
+}

spring-core-4/src/main/java/com/baeldung/startup/StartupApplicationListenerExample.java

@@ -0,0 +1,22 @@
+package com.baeldung.startup;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.springframework.context.ApplicationListener;
+import org.springframework.context.event.ContextRefreshedEvent;
+import org.springframework.stereotype.Component;
+
+@Component
+public class StartupApplicationListenerExample implements ApplicationListener<ContextRefreshedEvent> {
+
+    private static final Logger LOG = LoggerFactory.getLogger(StartupApplicationListenerExample.class);
+
+    public static int counter;
+
+    @Override
+    public void onApplicationEvent(ContextRefreshedEvent event) {
+        LOG.info("Increment counter");
+        counter++;
+    }
+}

spring-core-4/src/main/resources/startupConfig.xml

@@ -0,0 +1,16 @@
+<beans xmlns="http://www.springframework.org/schema/beans"
+       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xsi:schemaLocation="http://www.springframework.org/schema/beans
+	http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
+
+    <bean id="initMethodExampleBean"
+          class="com.baeldung.startup.InitMethodExampleBean"
+          scope="prototype"
+          init-method="init">
+    </bean>
+
+    <bean id="allStrategiesExampleBean"
+          class="com.baeldung.startup.AllStrategiesExampleBean"
+          init-method="init">
+    </bean>
+</beans>

spring-core-4/src/test/java/com/baeldung/lombok/ApologizeServiceAutowiringIntegrationTest.java

@@ -0,0 +1,33 @@
+package com.baeldung.lombok;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.when;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(
+  loader = AnnotationConfigContextLoader.class,
+  classes = TestConfig.class)
+public class ApologizeServiceAutowiringIntegrationTest {
+
+    private final static String TRANSLATED = "TRANSLATED";
+
+    @Autowired
+    private ApologizeService apologizeService;
+
+    @Autowired
+    private Translator translator;
+
+    @Test
+    public void apologizeWithTranslatedMessage() {
+        when(translator.translate("sorry")).thenReturn(TRANSLATED);
+        assertEquals(TRANSLATED, apologizeService.apologize());
+    }
+
+}

spring-core-4/src/test/java/com/baeldung/lombok/ApologizeServiceIntegrationTest.java

@@ -0,0 +1,21 @@
+package com.baeldung.lombok;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+public class ApologizeServiceIntegrationTest {
+
+    private final static String MESSAGE = "MESSAGE";
+    private final static String TRANSLATED = "TRANSLATED";
+
+    @Test
+    public void apologizeWithCustomTranslatedMessage() {
+        Translator translator = mock(Translator.class);
+        ApologizeService apologizeService = new ApologizeService(translator, MESSAGE);
+        when(translator.translate(MESSAGE)).thenReturn(TRANSLATED);
+        assertEquals(TRANSLATED, apologizeService.apologize());
+    }
+}

spring-core-4/src/test/java/com/baeldung/lombok/FarewellAutowiringIntegrationTest.java

@@ -0,0 +1,31 @@
+package com.baeldung.lombok;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.when;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(
+  loader = AnnotationConfigContextLoader.class,
+  classes = TestConfig.class)
+public class FarewellAutowiringIntegrationTest {
+
+    @Autowired
+    private FarewellService farewellService;
+
+    @Autowired
+    private Translator translator;
+
+    @Test
+    public void sayByeWithTranslatedMessage() {
+        String translated = "translated";
+        when(translator.translate("bye")).thenReturn(translated);
+        assertEquals(translated, farewellService.farewell());
+    }
+}

spring-core-4/src/test/java/com/baeldung/lombok/FarewellServiceIntegrationTest.java

@@ -0,0 +1,20 @@
+package com.baeldung.lombok;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+public class FarewellServiceIntegrationTest {
+
+    private final static String TRANSLATED = "TRANSLATED";
+
+    @Test
+    public void sayByeWithTranslatedMessage() {
+        Translator translator = mock(Translator.class);
+        when(translator.translate("bye")).thenReturn(TRANSLATED);
+        FarewellService farewellService = new FarewellService(translator);
+        assertEquals(TRANSLATED, farewellService.farewell());
+    }
+}

spring-core-4/src/test/java/com/baeldung/lombok/GreetingServiceIntegrationTest.java

@@ -0,0 +1,37 @@
+package com.baeldung.lombok;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.when;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(
+  loader = AnnotationConfigContextLoader.class,
+  classes = TestConfig.class)
+public class GreetingServiceIntegrationTest {
+
+    @Autowired
+    private GreetingService greetingService;
+
+    @Autowired
+    private Translator translator;
+
+    @Test
+    public void greetWithTranslatedMessage() {
+        String translated = "translated";
+        when(translator.translate("hello")).thenReturn(translated);
+        assertEquals(translated, greetingService.greet());
+    }
+
+    @Test(expected = NullPointerException.class)
+    public void throwWhenInstantiated() {
+        GreetingService greetingService = new GreetingService();
+        greetingService.greet();
+    }
+}

spring-core-4/src/test/java/com/baeldung/lombok/TestConfig.java

@@ -0,0 +1,17 @@
+package com.baeldung.lombok;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+
+import static org.mockito.Mockito.mock;
+
+@Configuration
+@ComponentScan("com.baeldung.lombok")
+class TestConfig {
+
+    @Bean
+    public Translator mockTranslator() {
+        return mock(Translator.class);
+    }
+}

spring-core-4/src/test/java/com/baeldung/lombok/ThankingServiceAutowiringIntegrationTest.java

@@ -0,0 +1,31 @@
+package com.baeldung.lombok;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.when;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(
+  loader = AnnotationConfigContextLoader.class,
+  classes = TestConfig.class)
+public class ThankingServiceAutowiringIntegrationTest {
+
+    @Autowired
+    private ThankingService thankingService;
+
+    @Autowired
+    private Translator translator;
+
+    @Test
+    public void thankWithTranslatedMessage() {
+        String translated = "translated";
+        when(translator.translate("thank you")).thenReturn(translated);
+        assertEquals(translated, thankingService.thank());
+    }
+}

spring-core-4/src/test/java/com/baeldung/lombok/ThankingServiceIntegrationTest.java

@@ -0,0 +1,20 @@
+package com.baeldung.lombok;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+public class ThankingServiceIntegrationTest {
+
+    private final static String TRANSLATED = "TRANSLATED";
+
+    @Test
+    public void thankWithTranslatedMessage() {
+        Translator translator = mock(Translator.class);
+        when(translator.translate("thank you")).thenReturn(TRANSLATED);
+        ThankingService thankingService = new ThankingService(translator);
+        assertEquals(TRANSLATED, thankingService.thank());
+    }
+}

spring-core-4/src/test/java/com/baeldung/startup/SpringStartupIntegrationTest.java

@@ -0,0 +1,44 @@
+package com.baeldung.startup;
+
+import org.assertj.core.api.Assertions;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.BeanCreationException;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { SpringStartupConfig.class }, loader = AnnotationConfigContextLoader.class)
+public class SpringStartupIntegrationTest {
+
+    @Autowired
+    private ApplicationContext ctx;
+
+    @Test(expected = BeanCreationException.class)
+    public void whenInstantiating_shouldThrowBCE() throws Exception {
+        ctx.getBean(InvalidInitExampleBean.class);
+    }
+
+    @Test
+    public void whenPostConstruct_shouldLogEnv() throws Exception {
+        ctx.getBean(PostConstructExampleBean.class);
+    }
+
+    @Test
+    public void whenConstructorInjection_shouldLogEnv() throws Exception {
+        ctx.getBean(LogicInConstructorExampleBean.class);
+    }
+
+    @Test
+    public void whenInitializingBean_shouldLogEnv() throws Exception {
+        ctx.getBean(InitializingBeanExampleBean.class);
+    }
+
+    @Test
+    public void whenApplicationListener_shouldRunOnce() throws Exception {
+        Assertions.assertThat(StartupApplicationListenerExample.counter).isEqualTo(1);
+    }
+}

spring-core-4/src/test/java/com/baeldung/startup/SpringStartupXMLConfigIntegrationTest.java

@@ -0,0 +1,26 @@
+package com.baeldung.startup;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration("classpath:startupConfig.xml")
+public class SpringStartupXMLConfigIntegrationTest {
+
+    @Autowired
+    private ApplicationContext ctx;
+
+    @Test
+    public void whenPostConstruct_shouldLogEnv() throws Exception {
+        ctx.getBean(InitMethodExampleBean.class);
+    }
+
+    @Test
+    public void whenAllStrategies_shouldLogOrder() throws Exception {
+        ctx.getBean(AllStrategiesExampleBean.class);
+    }
+}