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add modules for spring boot custom starter BAEL-762 (eugenp#1661)
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‎spring-boot-custom-starter/greeter-spring-boot-autoconfigure/pom.xml‎

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<project xmlns="http://maven.apache.org/POM/4.0.0" 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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<groupId>com.baeldung</groupId>
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<artifactId>greeter-spring-boot-autoconfigure</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<spring-boot.version>1.5.2.RELEASE</spring-boot.version>
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<greeter.version>0.0.1-SNAPSHOT</greeter.version>
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</properties>
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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</artifactId>
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<version>${spring-boot.version}</version>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-autoconfigure</artifactId>
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<version>${spring-boot.version}</version>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-configuration-processor</artifactId>
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<version>${spring-boot.version}</version>
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<optional>true</optional>
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</dependency>
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<dependency>
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<groupId>com.baeldung</groupId>
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<artifactId>greeter</artifactId>
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<version>${greeter.version}</version>
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<optional>true</optional>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.5.1</version>
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<configuration>
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<source>1.8</source>
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<target>1.8</target>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>

‎spring-boot-custom-starter/greeter-spring-boot-autoconfigure/src/main/java/com/baeldung/greeter/autoconfigure/GreeterAutoConfiguration.java‎

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package com.baeldung.greeter.autoconfigure;
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import static com.baeldung.greeter.GreeterConfigParams.*;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
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import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
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import org.springframework.boot.context.properties.EnableConfigurationProperties;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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import com.baeldung.greeter.Greeter;
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import com.baeldung.greeter.GreetingConfig;
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@Configuration
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@ConditionalOnClass(Greeter.class)
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@EnableConfigurationProperties(GreeterProperties.class)
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public class GreeterAutoConfiguration {
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@Autowired
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private GreeterProperties greeterProperties;
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@Bean
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@ConditionalOnMissingBean
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public GreetingConfig greeterConfig() {
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String userName = greeterProperties.getUserName() == null ? System.getProperty("user.name") : greeterProperties.getUserName();
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String morningMessage = greeterProperties.getMorningMessage() == null ? "Good Morning" : greeterProperties.getMorningMessage();
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String afternoonMessage = greeterProperties.getAfternoonMessage() == null ? "Good Afternoon" : greeterProperties.getAfternoonMessage();
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String eveningMessage = greeterProperties.getEveningMessage() == null ? "Good Evening" : greeterProperties.getEveningMessage();
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String nightMessage = greeterProperties.getNightMessage() == null ? "Good Night" : greeterProperties.getNightMessage();
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GreetingConfig greetingConfig = new GreetingConfig();
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greetingConfig.put(USER_NAME, userName);
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greetingConfig.put(MORNING_MESSAGE, morningMessage);
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greetingConfig.put(AFTERNOON_MESSAGE, afternoonMessage);
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greetingConfig.put(EVENING_MESSAGE, eveningMessage);
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greetingConfig.put(NIGHT_MESSAGE, nightMessage);
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return greetingConfig;
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}
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@Bean
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@ConditionalOnMissingBean
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public Greeter greeter(GreetingConfig greetingConfig) {
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return new Greeter(greetingConfig);
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}
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}

‎spring-boot-custom-starter/greeter-spring-boot-autoconfigure/src/main/java/com/baeldung/greeter/autoconfigure/GreeterProperties.java‎

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package com.baeldung.greeter.autoconfigure;
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import org.springframework.boot.context.properties.ConfigurationProperties;
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@ConfigurationProperties(prefix = "baeldung.greeter")
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public class GreeterProperties {
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private String userName;
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private String morningMessage;
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private String afternoonMessage;
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private String eveningMessage;
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private String nightMessage;
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public String getUserName() {
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return userName;
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}
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public void setUserName(String userName) {
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this.userName = userName;
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}
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public String getMorningMessage() {
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return morningMessage;
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}
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public void setMorningMessage(String morningMessage) {
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this.morningMessage = morningMessage;
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}
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public String getAfternoonMessage() {
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return afternoonMessage;
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}
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public void setAfternoonMessage(String afternoonMessage) {
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this.afternoonMessage = afternoonMessage;
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}
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public String getEveningMessage() {
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return eveningMessage;
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}
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public void setEveningMessage(String eveningMessage) {
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this.eveningMessage = eveningMessage;
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}
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public String getNightMessage() {
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return nightMessage;
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}
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public void setNightMessage(String nightMessage) {
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this.nightMessage = nightMessage;
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}
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}

‎spring-boot-custom-starter/greeter-spring-boot-autoconfigure/src/main/resources/META-INF/spring.factories‎

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org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
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com.baeldung.greeter.autoconfigure.GreeterAutoConfiguration

‎spring-boot-custom-starter/greeter-spring-boot-sample-app/pom.xml‎

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<project xmlns="http://maven.apache.org/POM/4.0.0" 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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<groupId>com.baeldung</groupId>
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<artifactId>greeter-spring-boot-sample-app</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<parent>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-parent</artifactId>
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<version>1.5.2.RELEASE</version>
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<relativePath></relativePath>
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</parent>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<java.version>1.8</java.version>
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<greeter-starter.version>0.0.1-SNAPSHOT</greeter-starter.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>com.baeldung</groupId>
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<artifactId>greeter-spring-boot-starter</artifactId>
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<version>${greeter-starter.version}</version>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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</dependencies>
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</project>

‎spring-boot-custom-starter/greeter-spring-boot-sample-app/src/main/java/com/baeldung/greeter/sample/GreeterSampleApplication.java‎

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package com.baeldung.greeter.sample;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.CommandLineRunner;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import com.baeldung.greeter.Greeter;
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@SpringBootApplication
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public class GreeterSampleApplication implements CommandLineRunner {
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@Autowired
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private Greeter greeter;
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public static void main(String[] args) {
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SpringApplication.run(GreeterSampleApplication.class, args);
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}
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@Override
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public void run(String... args) throws Exception {
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String message = greeter.greet();
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System.out.println(message);
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}
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}

‎spring-boot-custom-starter/greeter-spring-boot-sample-app/src/main/resources/application.properties‎

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baeldung.greeter.userName=Baeldung
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baeldung.greeter.afternoonMessage=Woha\ Afternoon

‎spring-boot-custom-starter/greeter-spring-boot-sample-app/src/test/java/com/baeldung/greeter/sample/GreeterSampleApplicationTest.java‎

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package com.baeldung.greeter.sample;
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import static org.junit.Assert.assertEquals;
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import java.time.LocalDateTime;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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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.junit4.SpringJUnit4ClassRunner;
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import com.baeldung.greeter.Greeter;
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@RunWith(SpringJUnit4ClassRunner.class)
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@SpringBootTest(classes = GreeterSampleApplication.class)
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public class GreeterSampleApplicationTest {
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@Autowired
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private Greeter greeter;
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@Test
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public void givenMorningTime_ifMorningMessage_thenSuccess() {
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String expected = "Hello Baeldung, Good Morning";
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String actual = greeter.greet(LocalDateTime.of(2017, 3, 1, 6, 0));
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assertEquals(expected, actual);
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}
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@Test
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public void givenAfternoonTime_ifAfternoonMessage_thenSuccess() {
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String expected = "Hello Baeldung, Woha Afternoon";
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String actual = greeter.greet(LocalDateTime.of(2017, 3, 1, 13, 0));
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assertEquals(expected, actual);
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}
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@Test
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public void givenEveningTime_ifEveningMessage_thenSuccess() {
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String expected = "Hello Baeldung, Good Evening";
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String actual = greeter.greet(LocalDateTime.of(2017, 3, 1, 19, 0));
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assertEquals(expected, actual);
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}
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@Test
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public void givenNightTime_ifNightMessage_thenSuccess() {
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String expected = "Hello Baeldung, Good Night";
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String actual = greeter.greet(LocalDateTime.of(2017, 3, 1, 21, 0));
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assertEquals(expected, actual);
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}
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}

‎spring-boot-custom-starter/greeter-spring-boot-starter/pom.xml‎

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<project xmlns="http://maven.apache.org/POM/4.0.0" 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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<groupId>com.baeldung</groupId>
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<artifactId>greeter-spring-boot-starter</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<greeter.version>0.0.1-SNAPSHOT</greeter.version>
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<spring-boot.version>1.5.2.RELEASE</spring-boot.version>
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</properties>
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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</artifactId>
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<version>${spring-boot.version}</version>
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</dependency>
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<dependency>
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<groupId>com.baeldung</groupId>
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<artifactId>greeter-spring-boot-autoconfigure</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>com.baeldung</groupId>
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<artifactId>greeter</artifactId>
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<version>${greeter.version}</version>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.5.1</version>
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<configuration>
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<source>1.8</source>
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<target>1.8</target>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>

‎spring-boot-custom-starter/greeter/README.md‎

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# Greeter App
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This app takes in the user's name and messages for different times of day as configuration parameters and outptus the greeting messge. For example it will take the name **John** and the message for morning time as **Good Morning** and output the message **Hello John, Good Morning**.
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## Usage
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Create and populate the class `GreetingConfig`, instantiate a `Greeter` using the `GreetingConfig` and use it get greeting messages:
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```java
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GreetingConfig greetingConfig = new GreetingConfig();
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greetingConfig.put(USER_NAME, "World");
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greetingConfig.put(MORNING_MESSAGE, "Good Morning");
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greetingConfig.put(AFTERNOON_MESSAGE, "Good Afternoon");
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greetingConfig.put(EVENING_MESSAGE, "Good Evening");
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greetingConfig.put(NIGHT_MESSAGE, "Good Night");
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Greeter greeter = new Greeter(greetingConfig);
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greeter.greet();
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```

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