add modules for spring boot custom starter BAEL-762 (#1661)

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

@@ -0,0 +1,59 @@
+<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.baeldung</groupId>
+    <artifactId>greeter-spring-boot-autoconfigure</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <spring-boot.version>1.5.2.RELEASE</spring-boot.version>
+        <greeter.version>0.0.1-SNAPSHOT</greeter.version>
+    </properties>
+
+    <dependencies>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot</artifactId>
+            <version>${spring-boot.version}</version>
+        </dependency>
+        
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-autoconfigure</artifactId>
+            <version>${spring-boot.version}</version>
+        </dependency>
+        
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-configuration-processor</artifactId>
+            <version>${spring-boot.version}</version>
+            <optional>true</optional>
+        </dependency>
+
+        <dependency>
+            <groupId>com.baeldung</groupId>
+            <artifactId>greeter</artifactId>
+            <version>${greeter.version}</version>
+            <optional>true</optional>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.5.1</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</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;
+
+import static com.baeldung.greeter.GreeterConfigParams.*;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import com.baeldung.greeter.Greeter;
+import com.baeldung.greeter.GreetingConfig;
+
+@Configuration
+@ConditionalOnClass(Greeter.class)
+@EnableConfigurationProperties(GreeterProperties.class)
+public class GreeterAutoConfiguration {
+
+    @Autowired
+    private GreeterProperties greeterProperties;
+
+    @Bean
+    @ConditionalOnMissingBean
+    public GreetingConfig greeterConfig() {
+
+        String userName = greeterProperties.getUserName() == null ? System.getProperty("user.name") : greeterProperties.getUserName();
+        String morningMessage = greeterProperties.getMorningMessage() == null ? "Good Morning" : greeterProperties.getMorningMessage();
+        String afternoonMessage = greeterProperties.getAfternoonMessage() == null ? "Good Afternoon" : greeterProperties.getAfternoonMessage();
+        String eveningMessage = greeterProperties.getEveningMessage() == null ? "Good Evening" : greeterProperties.getEveningMessage();
+        String nightMessage = greeterProperties.getNightMessage() == null ? "Good Night" : greeterProperties.getNightMessage();
+
+        GreetingConfig greetingConfig = new GreetingConfig();
+        greetingConfig.put(USER_NAME, userName);
+        greetingConfig.put(MORNING_MESSAGE, morningMessage);
+        greetingConfig.put(AFTERNOON_MESSAGE, afternoonMessage);
+        greetingConfig.put(EVENING_MESSAGE, eveningMessage);
+        greetingConfig.put(NIGHT_MESSAGE, nightMessage);
+        return greetingConfig;
+    }
+
+    @Bean
+    @ConditionalOnMissingBean
+    public Greeter greeter(GreetingConfig greetingConfig) {
+        return new Greeter(greetingConfig);
+    }
+
+}

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

@@ -0,0 +1,54 @@
+package com.baeldung.greeter.autoconfigure;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+
+@ConfigurationProperties(prefix = "baeldung.greeter")
+public class GreeterProperties {
+
+    private String userName;
+    private String morningMessage;
+    private String afternoonMessage;
+    private String eveningMessage;
+    private String nightMessage;
+
+    public String getUserName() {
+        return userName;
+    }
+
+    public void setUserName(String userName) {
+        this.userName = userName;
+    }
+
+    public String getMorningMessage() {
+        return morningMessage;
+    }
+
+    public void setMorningMessage(String morningMessage) {
+        this.morningMessage = morningMessage;
+    }
+
+    public String getAfternoonMessage() {
+        return afternoonMessage;
+    }
+
+    public void setAfternoonMessage(String afternoonMessage) {
+        this.afternoonMessage = afternoonMessage;
+    }
+
+    public String getEveningMessage() {
+        return eveningMessage;
+    }
+
+    public void setEveningMessage(String eveningMessage) {
+        this.eveningMessage = eveningMessage;
+    }
+
+    public String getNightMessage() {
+        return nightMessage;
+    }
+
+    public void setNightMessage(String nightMessage) {
+        this.nightMessage = nightMessage;
+    }
+
+}

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

@@ -0,0 +1,2 @@
+org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
+com.baeldung.greeter.autoconfigure.GreeterAutoConfiguration

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

@@ -0,0 +1,39 @@
+<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.baeldung</groupId>
+    <artifactId>greeter-spring-boot-sample-app</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>1.5.2.RELEASE</version>
+        <relativePath></relativePath>
+    </parent>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <java.version>1.8</java.version>
+        <greeter-starter.version>0.0.1-SNAPSHOT</greeter-starter.version>
+    </properties>
+
+    <dependencies>
+    
+        <dependency>
+            <groupId>com.baeldung</groupId>
+            <artifactId>greeter-spring-boot-starter</artifactId>
+            <version>${greeter-starter.version}</version>
+        </dependency>
+        
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+    </dependencies>
+
+
+</project>

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

@@ -0,0 +1,25 @@
+package com.baeldung.greeter.sample;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+import com.baeldung.greeter.Greeter;
+
+@SpringBootApplication
+public class GreeterSampleApplication implements CommandLineRunner {
+
+    @Autowired
+    private Greeter greeter;
+
+    public static void main(String[] args) {
+        SpringApplication.run(GreeterSampleApplication.class, args);
+    }
+
+    @Override
+    public void run(String... args) throws Exception {
+        String message = greeter.greet();
+        System.out.println(message);
+    }
+}

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

@@ -0,0 +1,2 @@
+baeldung.greeter.userName=Baeldung
+baeldung.greeter.afternoonMessage=Woha\ Afternoon

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

@@ -0,0 +1,50 @@
+package com.baeldung.greeter.sample;
+
+import static org.junit.Assert.assertEquals;
+
+import java.time.LocalDateTime;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+import com.baeldung.greeter.Greeter;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringBootTest(classes = GreeterSampleApplication.class)
+public class GreeterSampleApplicationTest {
+
+    @Autowired
+    private Greeter greeter;
+    
+    @Test
+    public void givenMorningTime_ifMorningMessage_thenSuccess() {
+        String expected = "Hello Baeldung, Good Morning";
+        String actual = greeter.greet(LocalDateTime.of(2017, 3, 1, 6, 0));
+        assertEquals(expected, actual);
+    }
+
+    @Test
+    public void givenAfternoonTime_ifAfternoonMessage_thenSuccess() {
+        String expected = "Hello Baeldung, Woha Afternoon";
+        String actual = greeter.greet(LocalDateTime.of(2017, 3, 1, 13, 0));
+        assertEquals(expected, actual);
+    }
+
+    @Test
+    public void givenEveningTime_ifEveningMessage_thenSuccess() {
+        String expected = "Hello Baeldung, Good Evening";
+        String actual = greeter.greet(LocalDateTime.of(2017, 3, 1, 19, 0));
+        assertEquals(expected, actual);
+    }
+
+    @Test
+    public void givenNightTime_ifNightMessage_thenSuccess() {
+        String expected = "Hello Baeldung, Good Night";
+        String actual = greeter.greet(LocalDateTime.of(2017, 3, 1, 21, 0));
+        assertEquals(expected, actual);
+    }
+    
+}

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

@@ -0,0 +1,51 @@
+<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.baeldung</groupId>
+    <artifactId>greeter-spring-boot-starter</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <greeter.version>0.0.1-SNAPSHOT</greeter.version>
+        <spring-boot.version>1.5.2.RELEASE</spring-boot.version>
+    </properties>
+
+    <dependencies>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter</artifactId>
+            <version>${spring-boot.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.baeldung</groupId>
+            <artifactId>greeter-spring-boot-autoconfigure</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>com.baeldung</groupId>
+            <artifactId>greeter</artifactId>
+            <version>${greeter.version}</version>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.5.1</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

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

@@ -0,0 +1,19 @@
+# Greeter App
+
+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**.
+
+## Usage
+
+Create and populate the class `GreetingConfig`, instantiate a `Greeter` using the `GreetingConfig` and use it get greeting messages:
+
+```java
+GreetingConfig greetingConfig = new GreetingConfig();
+greetingConfig.put(USER_NAME, "World");
+greetingConfig.put(MORNING_MESSAGE, "Good Morning");
+greetingConfig.put(AFTERNOON_MESSAGE, "Good Afternoon");
+greetingConfig.put(EVENING_MESSAGE, "Good Evening");
+greetingConfig.put(NIGHT_MESSAGE, "Good Night");
+
+Greeter greeter = new Greeter(greetingConfig);
+greeter.greet();
+```

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

@@ -0,0 +1,38 @@
+<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.baeldung</groupId>
+    <artifactId>greeter</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <dependencies>
+
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+            <scope>test</scope>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.5.1</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

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

@@ -0,0 +1,35 @@
+package com.baeldung.greeter;
+
+import static com.baeldung.greeter.GreeterConfigParams.*;
+
+import java.time.LocalDateTime;
+
+public class Greeter {
+
+    private GreetingConfig greetingConfig;
+
+    public Greeter(GreetingConfig greetingConfig) {
+        this.greetingConfig = greetingConfig;
+    }
+
+    public String greet(LocalDateTime localDateTime) {
+
+        String name = greetingConfig.getProperty(USER_NAME);
+        int hourOfDay = localDateTime.getHour();
+
+        if (hourOfDay >= 5 && hourOfDay < 12) {
+            return String.format("Hello %s, %s", name, greetingConfig.get(MORNING_MESSAGE));
+        } else if (hourOfDay >= 12 && hourOfDay < 17) {
+            return String.format("Hello %s, %s", name, greetingConfig.get(AFTERNOON_MESSAGE));
+        } else if (hourOfDay >= 17 && hourOfDay < 20) {
+            return String.format("Hello %s, %s", name, greetingConfig.get(EVENING_MESSAGE));
+        } else {
+            return String.format("Hello %s, %s", name, greetingConfig.get(NIGHT_MESSAGE));
+        }
+    }
+
+    public String greet() {
+        return greet(LocalDateTime.now());
+    }
+
+}

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

@@ -0,0 +1,11 @@
+package com.baeldung.greeter;
+
+public class GreeterConfigParams {
+
+    public static final String USER_NAME = "user.name";
+    public static final String MORNING_MESSAGE = "morning.message";
+    public static final String AFTERNOON_MESSAGE = "afternoon.message";
+    public static final String EVENING_MESSAGE = "evening.message";
+    public static final String NIGHT_MESSAGE = "night.message";
+    
+}

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

@@ -0,0 +1,9 @@
+package com.baeldung.greeter;
+
+import java.util.Properties;
+
+public class GreetingConfig extends Properties{
+    
+    private static final long serialVersionUID = 5662570853707247891L;
+
+}

spring-boot-custom-starter/greeter/src/test/java/com/baeldung/greeter/GreeterTest.java

@@ -0,0 +1,56 @@
+package com.baeldung.greeter;
+
+import static com.baeldung.greeter.GreeterConfigParams.*;
+import static org.junit.Assert.assertEquals;
+
+import java.time.LocalDateTime;
+
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+public class GreeterTest {
+
+    private static GreetingConfig greetingConfig;
+
+    @BeforeClass
+    public static void initalizeGreetingConfig() {
+        greetingConfig = new GreetingConfig();
+        greetingConfig.put(USER_NAME, "World");
+        greetingConfig.put(MORNING_MESSAGE, "Good Morning");
+        greetingConfig.put(AFTERNOON_MESSAGE, "Good Afternoon");
+        greetingConfig.put(EVENING_MESSAGE, "Good Evening");
+        greetingConfig.put(NIGHT_MESSAGE, "Good Night");
+    }
+
+    @Test
+    public void givenMorningTime_ifMorningMessage_thenSuccess() {
+        String expected = "Hello World, Good Morning";
+        Greeter greeter = new Greeter(greetingConfig);
+        String actual = greeter.greet(LocalDateTime.of(2017, 3, 1, 6, 0));
+        assertEquals(expected, actual);
+    }
+
+    @Test
+    public void givenAfternoonTime_ifAfternoonMessage_thenSuccess() {
+        String expected = "Hello World, Good Afternoon";
+        Greeter greeter = new Greeter(greetingConfig);
+        String actual = greeter.greet(LocalDateTime.of(2017, 3, 1, 13, 0));
+        assertEquals(expected, actual);
+    }
+
+    @Test
+    public void givenEveningTime_ifEveningMessage_thenSuccess() {
+        String expected = "Hello World, Good Evening";
+        Greeter greeter = new Greeter(greetingConfig);
+        String actual = greeter.greet(LocalDateTime.of(2017, 3, 1, 19, 0));
+        assertEquals(expected, actual);
+    }
+
+    @Test
+    public void givenNightTime_ifNightMessage_thenSuccess() {
+        String expected = "Hello World, Good Night";
+        Greeter greeter = new Greeter(greetingConfig);
+        String actual = greeter.greet(LocalDateTime.of(2017, 3, 1, 21, 0));
+        assertEquals(expected, actual);
+    }
+}

spring-boot-custom-starter/pom.xml

@@ -0,0 +1,34 @@
+<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.baeldung</groupId>
+    <artifactId>spring-boot-custom-starter</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <packaging>pom</packaging>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <modules>
+        <module>greeter</module>
+        <module>greeter-spring-boot-autoconfigure</module>
+        <module>greeter-spring-boot-starter</module>
+        <module>greeter-spring-boot-sample-app</module>
+    </modules>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.5.1</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>