Merge branch 'master' of https://github.com/JonCook/tutorials

core-java-modules/core-java-jpms/README.md

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+### Relevant Articles
+
+- [Design Strategies for Decoupling Java Modules](https://www.baeldung.com/java-modules-decoupling-design-strategies)

core-java-modules/core-java-jpms/decoupling-pattern1/consumermodule/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>consumermodule</artifactId>
+    <packaging>jar</packaging>
+    <version>1.0</version>
+    
+    <parent>
+        <groupId>com.baeldung.decoupling-pattern1</groupId>
+        <artifactId>decoupling-pattern1</artifactId>
+        <version>1.0</version>
+    </parent>
+    
+    <dependencies>
+        <dependency>
+            <groupId>com.baeldung.servicemodule</groupId>
+            <artifactId>servicemodule</artifactId>
+            <version>1.0</version>           
+        </dependency>
+    </dependencies>
+    
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+</project>

core-java-modules/core-java-jpms/decoupling-pattern1/consumermodule/src/main/java/com/baeldung/consumermodule/Application.java

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+package com.baeldung.consumermodule;
+
+import com.baeldung.servicemodule.external.TextService;
+import com.baeldung.servicemodule.external.TextServiceFactory;
+
+public class Application {
+    
+    public static void main(String args[]) {
+        TextService textService = TextServiceFactory.getTextService("lowercase");
+        System.out.println(textService.processText("Hello from Baeldung!"));
+    }
+    
+}

core-java-modules/core-java-jpms/decoupling-pattern1/consumermodule/src/main/java/module-info.java

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+module com.baeldung.consumermodule {
+    requires com.baeldung.servicemodule;
+}

core-java-modules/core-java-jpms/decoupling-pattern1/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>
+    <groupId>com.baeldung.decoupling-pattern1</groupId>
+    <artifactId>decoupling-pattern1</artifactId>
+    <version>1.0</version>
+    <packaging>pom</packaging>
+    
+    <modules>
+        <module>servicemodule</module>
+        <module>consumermodule</module>
+    </modules>
+    
+    <build>
+        <pluginManagement>
+            <plugins>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-compiler-plugin</artifactId>
+                    <version>3.8.0</version>
+                    <configuration>
+                        <source>11</source>
+                        <target>11</target>
+                    </configuration>
+                </plugin>
+            </plugins>
+        </pluginManagement>
+    </build>
+    
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+</project>

core-java-modules/core-java-jpms/decoupling-pattern1/servicemodule/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>
+    
+    <groupId>com.baeldung.servicemodule</groupId>
+    <artifactId>servicemodule</artifactId>
+    <packaging>jar</packaging>
+    
+    <parent>
+        <groupId>com.baeldung.decoupling-pattern1</groupId>
+        <artifactId>decoupling-pattern1</artifactId>
+        <version>1.0</version>
+    </parent>
+    
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+   
+</project>

core-java-modules/core-java-jpms/decoupling-pattern1/servicemodule/src/main/java/com/baeldung/servicemodule/external/TextService.java

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+package com.baeldung.servicemodule.external;
+
+public interface TextService {
+    
+    String processText(String text);
+    
+}

core-java-modules/core-java-jpms/decoupling-pattern1/servicemodule/src/main/java/com/baeldung/servicemodule/external/TextServiceFactory.java

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+package com.baeldung.servicemodule.external;
+
+import com.baeldung.servicemodule.internal.LowercaseTextService;
+import com.baeldung.servicemodule.internal.UppercaseTextService;
+
+public class TextServiceFactory {
+    
+    private TextServiceFactory() {}
+    
+    public static TextService getTextService(String name) {
+        return name.equalsIgnoreCase("lowercase") ? new LowercaseTextService(): new UppercaseTextService();
+    }
+    
+}

core-java-modules/core-java-jpms/decoupling-pattern1/servicemodule/src/main/java/com/baeldung/servicemodule/internal/LowercaseTextService.java

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+package com.baeldung.servicemodule.internal;
+
+import com.baeldung.servicemodule.external.TextService;
+
+public class LowercaseTextService implements TextService {
+
+    @Override
+    public String processText(String text) {
+        return text.toLowerCase();
+    }
+    
+}

core-java-modules/core-java-jpms/decoupling-pattern1/servicemodule/src/main/java/com/baeldung/servicemodule/internal/UppercaseTextService.java

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+package com.baeldung.servicemodule.internal;
+
+import com.baeldung.servicemodule.external.TextService;
+
+public class UppercaseTextService implements TextService {
+    
+    @Override
+    public String processText(String text) {
+        return text.toUpperCase();
+    }
+    
+}

core-java-modules/core-java-jpms/decoupling-pattern1/servicemodule/src/main/java/module-info.java

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+module com.baeldung.servicemodule {
+    exports com.baeldung.servicemodule.external;
+}

core-java-modules/core-java-jpms/decoupling-pattern2/consumermodule/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>
+    <groupId>com.baeldung.consumermodule</groupId>
+    <artifactId>consumermodule</artifactId>
+    <version>1.0</version>
+
+    <parent>
+        <artifactId>com.baeldung.decoupling-pattern2</artifactId>
+        <groupId>decoupling-pattern2</groupId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.baeldung.servicemodule</groupId>
+            <artifactId>servicemodule</artifactId>
+            <version>1.0</version>
+        </dependency>
+        <dependency>
+            <groupId>com.baeldung.providermodule</groupId>
+            <artifactId>providermodule</artifactId>
+            <version>1.0</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

core-java-modules/core-java-jpms/decoupling-pattern2/consumermodule/src/main/java/com/baeldung/consumermodule/Application.java

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+package com.baeldung.consumermodule;
+
+import com.baeldung.servicemodule.TextService;
+
+import java.util.ServiceLoader;
+
+public class Application {
+
+    public static void main(String[] args) {
+        ServiceLoader<TextService> services = ServiceLoader.load(TextService.class);
+        for (final TextService service: services) {
+            System.out.println("The service " + service.getClass().getSimpleName() + " says: " + service.parseText("Hello from Baeldung!"));
+        }
+    }
+}

core-java-modules/core-java-jpms/decoupling-pattern2/consumermodule/src/main/java/module-info.java

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+module com.baeldung.consumermodule {
+    requires com.baeldung.servicemodule;
+    uses com.baeldung.servicemodule.TextService;
+}

core-java-modules/core-java-jpms/decoupling-pattern2/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>
+
+    <groupId>com.baeldung.decoupling-pattern2</groupId>
+    <artifactId>decoupling-pattern2</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>pom</packaging>
+
+    <modules>
+        <module>servicemodule</module>
+        <module>providermodule</module>
+        <module>consumermodule</module>
+    </modules>
+
+    <build>
+        <pluginManagement>
+            <plugins>
+                <plugin>
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-compiler-plugin</artifactId>
+                    <version>3.8.0</version>
+                    <configuration>
+                        <source>11</source>
+                        <target>11</target>
+                    </configuration>
+                </plugin>
+            </plugins>
+        </pluginManagement>
+    </build>
+
+</project>

core-java-modules/core-java-jpms/decoupling-pattern2/providermodule/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>
+    <groupId>com.baeldung.providermodule</groupId>
+    <artifactId>providermodule</artifactId>
+    <version>1.0</version>
+
+    <parent>
+        <artifactId>com.baeldung.decoupling-pattern2</artifactId>
+        <groupId>decoupling-pattern2</groupId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.baeldung.servicemodule</groupId>
+            <artifactId>servicemodule</artifactId>
+            <version>1.0</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

core-java-modules/core-java-jpms/decoupling-pattern2/providermodule/src/main/java/com/baeldung/providermodule/LowercaseTextService.java

@@ -0,0 +1,10 @@
+package com.baeldung.providermodule;
+
+import com.baeldung.servicemodule.TextService;
+
+public class LowercaseTextService implements TextService {
+    @Override
+    public String parseText(String text) {
+        return text.toLowerCase();
+    }
+}

core-java-modules/core-java-jpms/decoupling-pattern2/providermodule/src/main/java/module-info.java

@@ -0,0 +1,4 @@
+module com.baeldung.providermodule {
+    requires com.baeldung.servicemodule;
+    provides com.baeldung.servicemodule.TextService with com.baeldung.providermodule.LowercaseTextService;
+}

core-java-modules/core-java-jpms/decoupling-pattern2/servicemodule/pom.xml

@@ -0,0 +1,25 @@
+<?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>
+    <groupId>com.baeldung.servicemodule</groupId>
+    <artifactId>servicemodule</artifactId>
+    <version>1.0</version>
+
+    <parent>
+        <artifactId>>com.baeldung.decoupling-pattern2</artifactId>
+        <groupId>decoupling-pattern2</groupId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

core-java-modules/core-java-jpms/decoupling-pattern2/servicemodule/src/main/java/com/baeldung/servicemodule/TextService.java

@@ -0,0 +1,6 @@
+package com.baeldung.servicemodule;
+
+public interface TextService {
+
+    String parseText(String text);
+}

core-java-modules/core-java-jpms/decoupling-pattern2/servicemodule/src/main/java/module-info.java

@@ -0,0 +1,3 @@
+module com.baeldung.servicemodule {
+    exports com.baeldung.servicemodule;
+}