BAEL-20864 Move Spring Boot Custom Starter Module

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

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+# 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-modules/spring-boot-custom-starter/greeter-library/pom.xml

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+<?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>
+    <artifactId>greeter-library</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+	<name>greeter-library</name>
+	
+    <parent>
+        <groupId>com.baeldung.spring-boot-modules</groupId>
+        <artifactId>spring-boot-custom-starter</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>..</relativePath>
+    </parent>
+
+</project>

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

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+package com.baeldung.greeter.library;
+
+import static com.baeldung.greeter.library.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-modules/spring-boot-custom-starter/greeter-library/src/main/java/com/baeldung/greeter/library/GreeterConfigParams.java

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+package com.baeldung.greeter.library;
+
+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-modules/spring-boot-custom-starter/greeter-library/src/main/java/com/baeldung/greeter/library/GreetingConfig.java

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+package com.baeldung.greeter.library;
+
+import java.util.Properties;
+
+public class GreetingConfig extends Properties{
+    
+    private static final long serialVersionUID = 5662570853707247891L;
+
+}

spring-boot-modules/spring-boot-custom-starter/greeter-library/src/main/resources/logback.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

spring-boot-modules/spring-boot-custom-starter/greeter-library/src/test/java/com/baeldung/greeter/GreeterIntegrationTest.java

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+package com.baeldung.greeter;
+
+import static com.baeldung.greeter.library.GreeterConfigParams.*;
+import static org.junit.Assert.assertEquals;
+
+import java.time.LocalDateTime;
+
+import com.baeldung.greeter.library.Greeter;
+import com.baeldung.greeter.library.GreetingConfig;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+public class GreeterIntegrationTest {
+
+    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);
+    }
+}