diff --git a/abstract-document/pom.xml b/abstract-document/pom.xml
index 020b04953b98..5a19c3c8193c 100644
--- a/abstract-document/pom.xml
+++ b/abstract-document/pom.xml
@@ -1,42 +1,55 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!--
-
-    The MIT License
-    Copyright © 2014-2019 Ilkka Seppälä
-
-    Permission is hereby granted, free of charge, to any person obtaining a copy
-    of this software and associated documentation files (the "Software"), to deal
-    in the Software without restriction, including without limitation the rights
-    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-    copies of the Software, and to permit persons to whom the Software is
-    furnished to do so, subject to the following conditions:
-
-    The above copyright notice and this permission notice shall be included in
-    all copies or substantial portions of the Software.
-
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-    THE SOFTWARE.
-
--->
-<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>
-    <parent>
-        <artifactId>java-design-patterns</artifactId>
-        <groupId>com.iluwatar</groupId>
-        <version>1.23.0-SNAPSHOT</version>
-    </parent>
-    <artifactId>abstract-document</artifactId>
-    <dependencies>
-        <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter-engine</artifactId>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
+<!-- The MIT License Copyright © 2014-2019 Ilkka Seppälä Permission is hereby 
+	granted, free of charge, to any person obtaining a copy of this software 
+	and associated documentation files (the "Software"), to deal in the Software 
+	without restriction, including without limitation the rights to use, copy, 
+	modify, merge, publish, distribute, sublicense, and/or sell copies of the 
+	Software, and to permit persons to whom the Software is furnished to do so, 
+	subject to the following conditions: The above copyright notice and this 
+	permission notice shall be included in all copies or substantial portions 
+	of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY 
+	KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
+	MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN 
+	NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+	DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
+	ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+	DEALINGS IN THE SOFTWARE. -->
+<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>
+	<parent>
+		<artifactId>java-design-patterns</artifactId>
+		<groupId>com.iluwatar</groupId>
+		<version>1.23.0-SNAPSHOT</version>
+	</parent>
+	<artifactId>abstract-document</artifactId>
+	<dependencies>
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter-engine</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+	<build>
+		<plugins>
+			<!-- Maven assembly plugin is invoked with default setting which we have 
+				in parent pom and specifying the class having main method -->
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-assembly-plugin</artifactId>
+				<executions>
+					<execution>
+						<configuration>
+							<archive>
+								<manifest>
+									<mainClass>com.iluwatar.abstractdocument.App</mainClass>
+								</manifest>
+							</archive>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
+		</plugins>
+	</build>
 </project>
diff --git a/abstract-factory/pom.xml b/abstract-factory/pom.xml
index 5bbe3afa7951..614b26232d99 100644
--- a/abstract-factory/pom.xml
+++ b/abstract-factory/pom.xml
@@ -1,42 +1,56 @@
 <?xml version="1.0"?>
-<!--
-
-    The MIT License
-    Copyright © 2014-2019 Ilkka Seppälä
-
-    Permission is hereby granted, free of charge, to any person obtaining a copy
-    of this software and associated documentation files (the "Software"), to deal
-    in the Software without restriction, including without limitation the rights
-    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-    copies of the Software, and to permit persons to whom the Software is
-    furnished to do so, subject to the following conditions:
-
-    The above copyright notice and this permission notice shall be included in
-    all copies or substantial portions of the Software.
-
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-    THE SOFTWARE.
-
--->
-<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
-  <modelVersion>4.0.0</modelVersion>
-  <parent>
-    <groupId>com.iluwatar</groupId>
-    <artifactId>java-design-patterns</artifactId>
-    <version>1.23.0-SNAPSHOT</version>
-  </parent>
-  <artifactId>abstract-factory</artifactId>
-  <dependencies>
-    <dependency>
-      <groupId>org.junit.jupiter</groupId>
-      <artifactId>junit-jupiter-engine</artifactId>
-      <scope>test</scope>
-    </dependency>
-  </dependencies>
+<!-- The MIT License Copyright © 2014-2019 Ilkka Seppälä Permission is hereby 
+	granted, free of charge, to any person obtaining a copy of this software 
+	and associated documentation files (the "Software"), to deal in the Software 
+	without restriction, including without limitation the rights to use, copy, 
+	modify, merge, publish, distribute, sublicense, and/or sell copies of the 
+	Software, and to permit persons to whom the Software is furnished to do so, 
+	subject to the following conditions: The above copyright notice and this 
+	permission notice shall be included in all copies or substantial portions 
+	of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY 
+	KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
+	MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN 
+	NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+	DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
+	ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+	DEALINGS IN THE SOFTWARE. -->
+<project
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
+	xmlns="http://maven.apache.org/POM/4.0.0"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>com.iluwatar</groupId>
+		<artifactId>java-design-patterns</artifactId>
+		<version>1.23.0-SNAPSHOT</version>
+	</parent>
+	<artifactId>abstract-factory</artifactId>
+	<dependencies>
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter-engine</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+	<build>
+		<plugins>
+			<!-- Maven assembly plugin is invoked with default setting which we have 
+				in parent pom and specifying the class having main method -->
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-assembly-plugin</artifactId>
+				<executions>
+					<execution>
+						<configuration>
+							<archive>
+								<manifest>
+									<mainClass>com.iluwatar.abstractfactory.App</mainClass>
+								</manifest>
+							</archive>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
+		</plugins>
+	</build>
 </project>
diff --git a/acyclic-visitor/pom.xml b/acyclic-visitor/pom.xml
index 55de9c7f9e4d..2179774c2eea 100644
--- a/acyclic-visitor/pom.xml
+++ b/acyclic-visitor/pom.xml
@@ -1,38 +1,29 @@
-<!--
-
-    The MIT License
-    Copyright © 2014-2019 Ilkka Seppälä
-
-    Permission is hereby granted, free of charge, to any person obtaining a copy
-    of this software and associated documentation files (the "Software"), to deal
-    in the Software without restriction, including without limitation the rights
-    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-    copies of the Software, and to permit persons to whom the Software is
-    furnished to do so, subject to the following conditions:
-
-    The above copyright notice and this permission notice shall be included in
-    all copies or substantial portions of the Software.
-
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-    THE SOFTWARE.
-
--->
+<!-- The MIT License Copyright © 2014-2019 Ilkka Seppälä Permission is hereby 
+	granted, free of charge, to any person obtaining a copy of this software 
+	and associated documentation files (the "Software"), to deal in the Software 
+	without restriction, including without limitation the rights to use, copy, 
+	modify, merge, publish, distribute, sublicense, and/or sell copies of the 
+	Software, and to permit persons to whom the Software is furnished to do so, 
+	subject to the following conditions: The above copyright notice and this 
+	permission notice shall be included in all copies or substantial portions 
+	of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY 
+	KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
+	MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN 
+	NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+	DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
+	ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+	DEALINGS IN THE SOFTWARE. -->
 <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>
-	
+
 	<parent>
 		<groupId>com.iluwatar</groupId>
 		<artifactId>java-design-patterns</artifactId>
 		<version>1.23.0-SNAPSHOT</version>
 	</parent>
-	
+
 	<artifactId>acyclic-visitor</artifactId>
 
 	<properties>
@@ -56,11 +47,11 @@
 			<version>1.0.0</version>
 			<scope>test</scope>
 		</dependency>
-    	<dependency>
-      		<groupId>org.junit.jupiter</groupId>
-      		<artifactId>junit-jupiter-engine</artifactId>
-      		<scope>test</scope>
-    	</dependency>
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter-engine</artifactId>
+			<scope>test</scope>
+		</dependency>
 		<dependency>
 			<groupId>org.mockito</groupId>
 			<artifactId>mockito-all</artifactId>
@@ -68,4 +59,25 @@
 			<scope>test</scope>
 		</dependency>
 	</dependencies>
+	<build>
+    <plugins>
+      <!-- Maven assembly plugin is invoked with default setting which we have 
+        in parent pom and specifying the class having main method -->
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-assembly-plugin</artifactId>
+        <executions>
+          <execution>
+            <configuration>
+              <archive>
+                <manifest>
+                  <mainClass>com.iluwatar.acyclicvisitor.App</mainClass>
+                </manifest>
+              </archive>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
+    </plugins>
+  </build>
 </project>
diff --git a/adapter/pom.xml b/adapter/pom.xml
index 02b979ec9a5f..4c725def8953 100644
--- a/adapter/pom.xml
+++ b/adapter/pom.xml
@@ -1,47 +1,61 @@
 <?xml version="1.0"?>
-<!--
-
-    The MIT License
-    Copyright © 2014-2019 Ilkka Seppälä
-
-    Permission is hereby granted, free of charge, to any person obtaining a copy
-    of this software and associated documentation files (the "Software"), to deal
-    in the Software without restriction, including without limitation the rights
-    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-    copies of the Software, and to permit persons to whom the Software is
-    furnished to do so, subject to the following conditions:
-
-    The above copyright notice and this permission notice shall be included in
-    all copies or substantial portions of the Software.
-
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-    THE SOFTWARE.
-
--->
-<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
-  <modelVersion>4.0.0</modelVersion>
-  <parent>
-    <groupId>com.iluwatar</groupId>
-    <artifactId>java-design-patterns</artifactId>
-    <version>1.23.0-SNAPSHOT</version>
-  </parent>
-  <artifactId>adapter</artifactId>
-  <dependencies>
-    <dependency>
-      <groupId>org.junit.jupiter</groupId>
-      <artifactId>junit-jupiter-engine</artifactId>
-      <scope>test</scope>
-    </dependency>
-    <dependency>
-      <groupId>org.mockito</groupId>
-      <artifactId>mockito-core</artifactId>
-      <scope>test</scope>
-    </dependency>
-  </dependencies>
+<!-- The MIT License Copyright © 2014-2019 Ilkka Seppälä Permission is hereby 
+	granted, free of charge, to any person obtaining a copy of this software 
+	and associated documentation files (the "Software"), to deal in the Software 
+	without restriction, including without limitation the rights to use, copy, 
+	modify, merge, publish, distribute, sublicense, and/or sell copies of the 
+	Software, and to permit persons to whom the Software is furnished to do so, 
+	subject to the following conditions: The above copyright notice and this 
+	permission notice shall be included in all copies or substantial portions 
+	of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY 
+	KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
+	MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN 
+	NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+	DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
+	ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+	DEALINGS IN THE SOFTWARE. -->
+<project
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
+	xmlns="http://maven.apache.org/POM/4.0.0"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>com.iluwatar</groupId>
+		<artifactId>java-design-patterns</artifactId>
+		<version>1.23.0-SNAPSHOT</version>
+	</parent>
+	<artifactId>adapter</artifactId>
+	<dependencies>
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter-engine</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.mockito</groupId>
+			<artifactId>mockito-core</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+	<build>
+		<plugins>
+			<!-- Maven assembly plugin is invoked with default setting which we have 
+				in parent pom and specifying the class having main method -->
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-assembly-plugin</artifactId>
+				<executions>
+					<execution>
+						<configuration>
+							<archive>
+								<manifest>
+									<mainClass>com.iluwatar.adapter.App</mainClass>
+								</manifest>
+							</archive>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
+		</plugins>
+	</build>
 </project>
diff --git a/aggregator-microservices/aggregator-service/pom.xml b/aggregator-microservices/aggregator-service/pom.xml
index 5690c026a241..f4482d0e3f8b 100644
--- a/aggregator-microservices/aggregator-service/pom.xml
+++ b/aggregator-microservices/aggregator-service/pom.xml
@@ -1,73 +1,81 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!--
-
-    The MIT License
-    Copyright © 2014-2019 Ilkka Seppälä
-
-    Permission is hereby granted, free of charge, to any person obtaining a copy
-    of this software and associated documentation files (the "Software"), to deal
-    in the Software without restriction, including without limitation the rights
-    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-    copies of the Software, and to permit persons to whom the Software is
-    furnished to do so, subject to the following conditions:
-
-    The above copyright notice and this permission notice shall be included in
-    all copies or substantial portions of the Software.
-
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-    THE SOFTWARE.
-
--->
+<!-- The MIT License Copyright © 2014-2019 Ilkka Seppälä Permission is hereby 
+	granted, free of charge, to any person obtaining a copy of this software 
+	and associated documentation files (the "Software"), to deal in the Software 
+	without restriction, including without limitation the rights to use, copy, 
+	modify, merge, publish, distribute, sublicense, and/or sell copies of the 
+	Software, and to permit persons to whom the Software is furnished to do so, 
+	subject to the following conditions: The above copyright notice and this 
+	permission notice shall be included in all copies or substantial portions 
+	of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY 
+	KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
+	MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN 
+	NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+	DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
+	ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+	DEALINGS IN THE SOFTWARE. -->
 <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">
-    <parent>
-        <artifactId>aggregator-microservices</artifactId>
-        <groupId>com.iluwatar</groupId>
-        <version>1.23.0-SNAPSHOT</version>
-    </parent>
-    <modelVersion>4.0.0</modelVersion>
-    <artifactId>aggregator-service</artifactId>
-    <packaging>jar</packaging>
-    <dependencies>
-        <dependency>
-            <groupId>org.springframework</groupId>
-            <artifactId>spring-webmvc</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-web</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter-engine</artifactId>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.mockito</groupId>
-            <artifactId>mockito-core</artifactId>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
+	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">
+	<parent>
+		<artifactId>aggregator-microservices</artifactId>
+		<groupId>com.iluwatar</groupId>
+		<version>1.23.0-SNAPSHOT</version>
+	</parent>
+	<modelVersion>4.0.0</modelVersion>
+	<artifactId>aggregator-service</artifactId>
+	<packaging>jar</packaging>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-webmvc</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter-engine</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.mockito</groupId>
+			<artifactId>mockito-core</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
 
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.springframework.boot</groupId>
-                <artifactId>spring-boot-maven-plugin</artifactId>
-                <executions>
-                    <execution>
-                        <goals>
-                            <goal>repackage</goal>
-                        </goals>
-                    </execution>
-                </executions>
-            </plugin>
-        </plugins>
-    </build>
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+				<executions>
+					<execution>
+						<goals>
+							<goal>repackage</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
+			<!-- Maven assembly plugin is invoked with default setting which we have 
+				in parent pom and specifying the class having main method -->
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-assembly-plugin</artifactId>
+				<executions>
+					<execution>
+						<configuration>
+							<archive>
+								<manifest>
+									<mainClass>com.iluwatar.aggregator.microservices.App</mainClass>
+								</manifest>
+							</archive>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
+		</plugins>
+	</build>
 </project>
diff --git a/aggregator-microservices/information-microservice/pom.xml b/aggregator-microservices/information-microservice/pom.xml
index f1d9d2dc0de8..f99d26b65665 100644
--- a/aggregator-microservices/information-microservice/pom.xml
+++ b/aggregator-microservices/information-microservice/pom.xml
@@ -1,70 +1,76 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!--
-
-    The MIT License
-    Copyright © 2014-2019 Ilkka Seppälä
-
-    Permission is hereby granted, free of charge, to any person obtaining a copy
-    of this software and associated documentation files (the "Software"), to deal
-    in the Software without restriction, including without limitation the rights
-    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-    copies of the Software, and to permit persons to whom the Software is
-    furnished to do so, subject to the following conditions:
-
-    The above copyright notice and this permission notice shall be included in
-    all copies or substantial portions of the Software.
-
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-    THE SOFTWARE.
-
--->
+<!-- The MIT License Copyright © 2014-2019 Ilkka Seppälä Permission is hereby 
+	granted, free of charge, to any person obtaining a copy of this software 
+	and associated documentation files (the "Software"), to deal in the Software 
+	without restriction, including without limitation the rights to use, copy, 
+	modify, merge, publish, distribute, sublicense, and/or sell copies of the 
+	Software, and to permit persons to whom the Software is furnished to do so, 
+	subject to the following conditions: The above copyright notice and this 
+	permission notice shall be included in all copies or substantial portions 
+	of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY 
+	KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
+	MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN 
+	NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+	DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
+	ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+	DEALINGS IN THE SOFTWARE. -->
 <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">
-    <parent>
-        <artifactId>aggregator-microservices</artifactId>
-        <groupId>com.iluwatar</groupId>
-        <version>1.23.0-SNAPSHOT</version>
-    </parent>
-    <modelVersion>4.0.0</modelVersion>
+	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">
+	<parent>
+		<artifactId>aggregator-microservices</artifactId>
+		<groupId>com.iluwatar</groupId>
+		<version>1.23.0-SNAPSHOT</version>
+	</parent>
+	<modelVersion>4.0.0</modelVersion>
 
-    <artifactId>information-microservice</artifactId>
-    <packaging>jar</packaging>
+	<artifactId>information-microservice</artifactId>
+	<packaging>jar</packaging>
 
-    <dependencies>
-        <dependency>
-            <groupId>org.springframework</groupId>
-            <artifactId>spring-webmvc</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-web</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter-engine</artifactId>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-webmvc</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter-engine</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
 
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.springframework.boot</groupId>
-                <artifactId>spring-boot-maven-plugin</artifactId>
-                <executions>
-                    <execution>
-                        <goals>
-                            <goal>repackage</goal>
-                        </goals>
-                    </execution>
-                </executions>
-            </plugin>
-        </plugins>
-    </build>
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+				<executions>
+					<execution>
+						<goals>
+							<goal>repackage</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-assembly-plugin</artifactId>
+				<executions>
+					<execution>
+						<configuration>
+							<archive>
+								<manifest>
+									<mainClass>com.iluwatar.information.microservices.InformationApplication</mainClass>
+								</manifest>
+							</archive>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
+		</plugins>
+	</build>
 </project>
diff --git a/aggregator-microservices/inventory-microservice/pom.xml b/aggregator-microservices/inventory-microservice/pom.xml
index 93ced9f686e1..f7899aa8f307 100644
--- a/aggregator-microservices/inventory-microservice/pom.xml
+++ b/aggregator-microservices/inventory-microservice/pom.xml
@@ -1,69 +1,75 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!--
-
-    The MIT License
-    Copyright © 2014-2019 Ilkka Seppälä
-
-    Permission is hereby granted, free of charge, to any person obtaining a copy
-    of this software and associated documentation files (the "Software"), to deal
-    in the Software without restriction, including without limitation the rights
-    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-    copies of the Software, and to permit persons to whom the Software is
-    furnished to do so, subject to the following conditions:
-
-    The above copyright notice and this permission notice shall be included in
-    all copies or substantial portions of the Software.
-
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-    THE SOFTWARE.
-
--->
+<!-- The MIT License Copyright © 2014-2019 Ilkka Seppälä Permission is hereby 
+	granted, free of charge, to any person obtaining a copy of this software 
+	and associated documentation files (the "Software"), to deal in the Software 
+	without restriction, including without limitation the rights to use, copy, 
+	modify, merge, publish, distribute, sublicense, and/or sell copies of the 
+	Software, and to permit persons to whom the Software is furnished to do so, 
+	subject to the following conditions: The above copyright notice and this 
+	permission notice shall be included in all copies or substantial portions 
+	of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY 
+	KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
+	MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN 
+	NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+	DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
+	ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+	DEALINGS IN THE SOFTWARE. -->
 <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">
-    <parent>
-        <artifactId>aggregator-microservices</artifactId>
-        <groupId>com.iluwatar</groupId>
-        <version>1.23.0-SNAPSHOT</version>
-    </parent>
-    <modelVersion>4.0.0</modelVersion>
-    <artifactId>inventory-microservice</artifactId>
+	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">
+	<parent>
+		<artifactId>aggregator-microservices</artifactId>
+		<groupId>com.iluwatar</groupId>
+		<version>1.23.0-SNAPSHOT</version>
+	</parent>
+	<modelVersion>4.0.0</modelVersion>
+	<artifactId>inventory-microservice</artifactId>
 
-    <packaging>jar</packaging>
-    <dependencies>
-        <dependency>
-            <groupId>org.springframework</groupId>
-            <artifactId>spring-webmvc</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>org.springframework.boot</groupId>
-            <artifactId>spring-boot-starter-web</artifactId>
-        </dependency>
-        <dependency>
-            <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter-engine</artifactId>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
+	<packaging>jar</packaging>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework</groupId>
+			<artifactId>spring-webmvc</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter-engine</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
 
-    <build>
-        <plugins>
-            <plugin>
-                <groupId>org.springframework.boot</groupId>
-                <artifactId>spring-boot-maven-plugin</artifactId>
-                <executions>
-                    <execution>
-                        <goals>
-                            <goal>repackage</goal>
-                        </goals>
-                    </execution>
-                </executions>
-            </plugin>
-        </plugins>
-    </build>
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+				<executions>
+					<execution>
+						<goals>
+							<goal>repackage</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-assembly-plugin</artifactId>
+				<executions>
+					<execution>
+						<configuration>
+							<archive>
+								<manifest>
+									<mainClass>com.iluwatar.inventory.microservices.InventoryApplication</mainClass>
+								</manifest>
+							</archive>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
+		</plugins>
+	</build>
 </project>
diff --git a/ambassador/pom.xml b/ambassador/pom.xml
index 350cace6adeb..6d6a9894de20 100644
--- a/ambassador/pom.xml
+++ b/ambassador/pom.xml
@@ -1,43 +1,53 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!--
-
-    The MIT License
-    Copyright © 2014-2019 Ilkka Seppälä
-
-    Permission is hereby granted, free of charge, to any person obtaining a copy
-    of this software and associated documentation files (the "Software"), to deal
-    in the Software without restriction, including without limitation the rights
-    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-    copies of the Software, and to permit persons to whom the Software is
-    furnished to do so, subject to the following conditions:
-
-    The above copyright notice and this permission notice shall be included in
-    all copies or substantial portions of the Software.
-
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-    THE SOFTWARE.
-
--->
+<!-- The MIT License Copyright © 2014-2019 Ilkka Seppälä Permission is hereby 
+	granted, free of charge, to any person obtaining a copy of this software 
+	and associated documentation files (the "Software"), to deal in the Software 
+	without restriction, including without limitation the rights to use, copy, 
+	modify, merge, publish, distribute, sublicense, and/or sell copies of the 
+	Software, and to permit persons to whom the Software is furnished to do so, 
+	subject to the following conditions: The above copyright notice and this 
+	permission notice shall be included in all copies or substantial portions 
+	of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY 
+	KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
+	MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN 
+	NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+	DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
+	ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+	DEALINGS IN THE SOFTWARE. -->
 <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">
-  <parent>
-    <artifactId>java-design-patterns</artifactId>
-    <groupId>com.iluwatar</groupId>
-    <version>1.23.0-SNAPSHOT</version>
-  </parent>
-  <modelVersion>4.0.0</modelVersion>
-  <artifactId>ambassador</artifactId>
-  <dependencies>
-    <dependency>
-      <groupId>org.junit.jupiter</groupId>
-      <artifactId>junit-jupiter-engine</artifactId>
-      <scope>test</scope>
-    </dependency>
-  </dependencies>
+	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">
+	<parent>
+		<artifactId>java-design-patterns</artifactId>
+		<groupId>com.iluwatar</groupId>
+		<version>1.23.0-SNAPSHOT</version>
+	</parent>
+	<modelVersion>4.0.0</modelVersion>
+	<artifactId>ambassador</artifactId>
+	<dependencies>
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter-engine</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-assembly-plugin</artifactId>
+				<executions>
+					<execution>
+						<configuration>
+							<archive>
+								<manifest>
+									<mainClass>com.iluwatar.ambassador.App</mainClass>
+								</manifest>
+							</archive>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
+		</plugins>
+	</build>
 </project>
diff --git a/api-gateway/api-gateway-service/pom.xml b/api-gateway/api-gateway-service/pom.xml
index 1be25c304665..744023e900c2 100644
--- a/api-gateway/api-gateway-service/pom.xml
+++ b/api-gateway/api-gateway-service/pom.xml
@@ -68,6 +68,21 @@
           </execution>
         </executions>
       </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-assembly-plugin</artifactId>
+        <executions>
+          <execution>
+            <configuration>
+              <archive>
+                <manifest>
+                  <mainClass>com.iluwatar.api.gateway.App</mainClass>
+                </manifest>
+              </archive>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
     </plugins>
   </build>
 </project>
diff --git a/api-gateway/image-microservice/pom.xml b/api-gateway/image-microservice/pom.xml
index bcbaeb539717..27ef343afabc 100644
--- a/api-gateway/image-microservice/pom.xml
+++ b/api-gateway/image-microservice/pom.xml
@@ -63,6 +63,21 @@
           </execution>
         </executions>
       </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-assembly-plugin</artifactId>
+        <executions>
+          <execution>
+            <configuration>
+              <archive>
+                <manifest>
+                  <mainClass>com.iluwatar.image.microservice.ImageApplication</mainClass>
+                </manifest>
+              </archive>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
     </plugins>
   </build>
 </project>
diff --git a/api-gateway/price-microservice/pom.xml b/api-gateway/price-microservice/pom.xml
index 47f16b4dd31f..e7b144c5895c 100644
--- a/api-gateway/price-microservice/pom.xml
+++ b/api-gateway/price-microservice/pom.xml
@@ -65,6 +65,21 @@
           </execution>
         </executions>
       </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-assembly-plugin</artifactId>
+        <executions>
+          <execution>
+            <configuration>
+              <archive>
+                <manifest>
+                  <mainClass>com.iluwatar.price.microservices.PriceApplication</mainClass>
+                </manifest>
+              </archive>
+            </configuration>
+          </execution>
+        </executions>
+      </plugin>
     </plugins>
   </build>
 </project>
diff --git a/async-method-invocation/pom.xml b/async-method-invocation/pom.xml
index 62ec375dfad7..46aa9d354a0f 100644
--- a/async-method-invocation/pom.xml
+++ b/async-method-invocation/pom.xml
@@ -1,52 +1,64 @@
 <?xml version="1.0"?>
-<!--
-
-    The MIT License
-    Copyright © 2014-2019 Ilkka Seppälä
-
-    Permission is hereby granted, free of charge, to any person obtaining a copy
-    of this software and associated documentation files (the "Software"), to deal
-    in the Software without restriction, including without limitation the rights
-    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-    copies of the Software, and to permit persons to whom the Software is
-    furnished to do so, subject to the following conditions:
-
-    The above copyright notice and this permission notice shall be included in
-    all copies or substantial portions of the Software.
-
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-    THE SOFTWARE.
-
--->
-<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
-  <modelVersion>4.0.0</modelVersion>
-  <parent>
-    <groupId>com.iluwatar</groupId>
-    <artifactId>java-design-patterns</artifactId>
-    <version>1.23.0-SNAPSHOT</version>
-  </parent>
-  <artifactId>async-method-invocation</artifactId>
-  <dependencies>
-    <dependency>
-      <groupId>org.junit.jupiter</groupId>
-      <artifactId>junit-jupiter-engine</artifactId>
-      <scope>test</scope>
-    </dependency>
-    <dependency>
-      <groupId>org.mockito</groupId>
-      <artifactId>mockito-core</artifactId>
-      <scope>test</scope>
-    </dependency>
-    <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
-      <scope>test</scope>
-    </dependency>
-  </dependencies>
+<!-- The MIT License Copyright © 2014-2019 Ilkka Seppälä Permission is hereby 
+	granted, free of charge, to any person obtaining a copy of this software 
+	and associated documentation files (the "Software"), to deal in the Software 
+	without restriction, including without limitation the rights to use, copy, 
+	modify, merge, publish, distribute, sublicense, and/or sell copies of the 
+	Software, and to permit persons to whom the Software is furnished to do so, 
+	subject to the following conditions: The above copyright notice and this 
+	permission notice shall be included in all copies or substantial portions 
+	of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY 
+	KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
+	MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN 
+	NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+	DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
+	ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+	DEALINGS IN THE SOFTWARE. -->
+<project
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
+	xmlns="http://maven.apache.org/POM/4.0.0"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>com.iluwatar</groupId>
+		<artifactId>java-design-patterns</artifactId>
+		<version>1.23.0-SNAPSHOT</version>
+	</parent>
+	<artifactId>async-method-invocation</artifactId>
+	<dependencies>
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter-engine</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.mockito</groupId>
+			<artifactId>mockito-core</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>junit</groupId>
+			<artifactId>junit</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-assembly-plugin</artifactId>
+				<executions>
+					<execution>
+						<configuration>
+							<archive>
+								<manifest>
+									<mainClass>com.iluwatar.async.method.invocation.App</mainClass>
+								</manifest>
+							</archive>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
+		</plugins>
+	</build>
 </project>
diff --git a/pom.xml b/pom.xml
index 39582fd93718..9ffaa852574a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1,500 +1,511 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!--
-
-    The MIT License
-    Copyright © 2014-2019 Ilkka Seppälä
-
-    Permission is hereby granted, free of charge, to any person obtaining a copy
-    of this software and associated documentation files (the "Software"), to deal
-    in the Software without restriction, including without limitation the rights
-    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-    copies of the Software, and to permit persons to whom the Software is
-    furnished to do so, subject to the following conditions:
-
-    The above copyright notice and this permission notice shall be included in
-    all copies or substantial portions of the Software.
-
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-    THE SOFTWARE.
-
--->
-<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.iluwatar</groupId>
-    <artifactId>java-design-patterns</artifactId>
-    <version>1.23.0-SNAPSHOT</version>
-    <packaging>pom</packaging>
-    <inceptionYear>2014-2019</inceptionYear>
-    <properties>
-        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <hibernate.version>5.2.18.Final</hibernate.version>
-        <spring.version>5.0.13.RELEASE</spring.version>
-        <spring-boot.version>2.0.9.RELEASE</spring-boot.version>
-        <spring-data.version>2.0.14.RELEASE</spring-data.version>
-        <h2.version>1.4.190</h2.version>
-        <junit.version>4.12</junit.version>
-        <junit-jupiter.version>5.5.2</junit-jupiter.version>
-        <junit-vintage.version>${junit.version}.2</junit-vintage.version>
-        <sping-test-junit5.version>1.0.2</sping-test-junit5.version>
-        <compiler.version>3.8.1</compiler.version>
-        <jacoco.version>0.8.4</jacoco.version>
-        <commons-dbcp.version>1.4</commons-dbcp.version>
-        <camel.version>2.24.0</camel.version>
-        <guava.version>19.0</guava.version>
-        <mockito.version>1.10.19</mockito.version>
-        <htmlunit.version>2.22</htmlunit.version>
-        <guice.version>4.0</guice.version>
-        <mongo-java-driver.version>3.3.0</mongo-java-driver.version>
-        <slf4j.version>1.7.28</slf4j.version>
-        <logback.version>1.2.3</logback.version>
-        <aws-lambda-core.version>1.1.0</aws-lambda-core.version>
-        <aws-java-sdk-dynamodb.version>1.11.289</aws-java-sdk-dynamodb.version>
-        <aws-lambda-java-events.version>2.0.1</aws-lambda-java-events.version>
-        <jackson.version>2.8.5</jackson.version>
-        <jaxb-api.version>2.3.1</jaxb-api.version>
-        <jaxb-impl.version>2.3.2</jaxb-impl.version>
-        <annotation-api.version>1.3.2</annotation-api.version>
-        <system-rules.version>1.19.0</system-rules.version>
-    </properties>
-    <modules>
-        <module>abstract-factory</module>
-        <module>tls</module>
-        <module>builder</module>
-        <module>factory-method</module>
-        <module>prototype</module>
-        <module>singleton</module>
-        <module>adapter</module>
-        <module>bridge</module>
-        <module>composite</module>
-        <module>dao</module>
-        <module>data-mapper</module>
-        <module>decorator</module>
-        <module>facade</module>
-        <module>flyweight</module>
-        <module>proxy</module>
-        <module>chain</module>
-        <module>command</module>
-        <module>interpreter</module>
-        <module>iterator</module>
-        <module>mediator</module>
-        <module>memento</module>
-        <module>model-view-presenter</module>
-        <module>observer</module>
-        <module>state</module>
-        <module>strategy</module>
-        <module>template-method</module>
-        <module>visitor</module>
-        <module>double-checked-locking</module>
-        <module>servant</module>
-        <module>service-locator</module>
-        <module>null-object</module>
-        <module>event-aggregator</module>
-        <module>callback</module>
-        <module>execute-around</module>
-        <module>property</module>
-        <module>intercepting-filter</module>
-        <module>producer-consumer</module>
-        <module>pipeline</module>
-        <module>poison-pill</module>
-        <module>reader-writer-lock</module>
-        <module>lazy-loading</module>
-        <module>service-layer</module>
-        <module>specification</module>
-        <module>tolerant-reader</module>
-        <module>model-view-controller</module>
-        <module>flux</module>
-        <module>double-dispatch</module>
-        <module>multiton</module>
-        <module>resource-acquisition-is-initialization</module>
-        <module>thread-pool</module>
-        <module>twin</module>
-        <module>private-class-data</module>
-        <module>object-pool</module>
-        <module>dependency-injection</module>
-        <module>naked-objects</module>
-        <module>front-controller</module>
-        <module>repository</module>
-        <module>async-method-invocation</module>
-        <module>monostate</module>
-        <module>step-builder</module>
-        <module>business-delegate</module>
-        <module>half-sync-half-async</module>
-        <module>layers</module>
-        <module>eip-message-channel</module>
-        <module>fluentinterface</module>
-        <module>reactor</module>
-        <module>caching</module>
-        <module>eip-publish-subscribe</module>
-        <module>delegation</module>
-        <module>event-driven-architecture</module>
-        <module>api-gateway</module>
-        <module>factory-kit</module>
-        <module>feature-toggle</module>
-        <module>value-object</module>
-        <module>module</module>
-        <module>monad</module>
-        <module>mute-idiom</module>
-        <module>mutex</module>
-        <module>semaphore</module>
-        <module>hexagonal</module>
-        <module>abstract-document</module>
-        <module>aggregator-microservices</module>
-        <module>promise</module>
-        <module>page-object</module>
-        <module>event-asynchronous</module>
-        <module>event-queue</module>
-        <module>queue-load-leveling</module>
-        <module>object-mother</module>
-        <module>data-bus</module>
-        <module>converter</module>
-        <module>guarded-suspension</module>
-        <module>balking</module>
-        <module>extension-objects</module>
-        <module>marker</module>
-        <module>cqrs</module>
-        <module>event-sourcing</module>
-        <module>data-transfer-object</module>
-        <module>throttling</module>
-        <module>unit-of-work</module>
-        <module>partial-response</module>
-        <module>eip-wire-tap</module>
-        <module>eip-splitter</module>
-        <module>eip-aggregator</module>
-        <module>retry</module>
-        <module>dirty-flag</module>
-        <module>trampoline</module>
-        <module>serverless</module>
-        <module>ambassador</module>
-        <module>acyclic-visitor</module>
-        <module>collection-pipeline</module>
-        <module>master-worker-pattern</module>
-        <module>spatial-partition</module>
-        <module>priority-queue</module>
-	    <module>commander</module>
-	    <module>typeobjectpattern</module>
-        <module>bytecode</module>
-        <module>leader-election</module>
-        <module>data-locality</module>
-        <module>subclass-sandbox</module>
-        <module>circuit-breaker</module>
-        <module>role-object</module>
+<!-- The MIT License Copyright © 2014-2019 Ilkka Seppälä Permission is hereby 
+	granted, free of charge, to any person obtaining a copy of this software 
+	and associated documentation files (the "Software"), to deal in the Software 
+	without restriction, including without limitation the rights to use, copy, 
+	modify, merge, publish, distribute, sublicense, and/or sell copies of the 
+	Software, and to permit persons to whom the Software is furnished to do so, 
+	subject to the following conditions: The above copyright notice and this 
+	permission notice shall be included in all copies or substantial portions 
+	of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY 
+	KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
+	MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN 
+	NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+	DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
+	ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+	DEALINGS IN THE SOFTWARE. -->
+<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.iluwatar</groupId>
+	<artifactId>java-design-patterns</artifactId>
+	<version>1.23.0-SNAPSHOT</version>
+	<packaging>pom</packaging>
+	<inceptionYear>2014-2019</inceptionYear>
+	<properties>
+		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+		<hibernate.version>5.2.18.Final</hibernate.version>
+		<spring.version>5.0.13.RELEASE</spring.version>
+		<spring-boot.version>2.0.9.RELEASE</spring-boot.version>
+		<spring-data.version>2.0.14.RELEASE</spring-data.version>
+		<h2.version>1.4.190</h2.version>
+		<junit.version>4.12</junit.version>
+		<junit-jupiter.version>5.5.2</junit-jupiter.version>
+		<junit-vintage.version>${junit.version}.2</junit-vintage.version>
+		<sping-test-junit5.version>1.0.2</sping-test-junit5.version>
+		<compiler.version>3.8.1</compiler.version>
+		<jacoco.version>0.8.4</jacoco.version>
+		<commons-dbcp.version>1.4</commons-dbcp.version>
+		<camel.version>2.24.0</camel.version>
+		<guava.version>19.0</guava.version>
+		<mockito.version>1.10.19</mockito.version>
+		<htmlunit.version>2.22</htmlunit.version>
+		<guice.version>4.0</guice.version>
+		<mongo-java-driver.version>3.3.0</mongo-java-driver.version>
+		<slf4j.version>1.7.28</slf4j.version>
+		<logback.version>1.2.3</logback.version>
+		<aws-lambda-core.version>1.1.0</aws-lambda-core.version>
+		<aws-java-sdk-dynamodb.version>1.11.289</aws-java-sdk-dynamodb.version>
+		<aws-lambda-java-events.version>2.0.1</aws-lambda-java-events.version>
+		<jackson.version>2.8.5</jackson.version>
+		<jaxb-api.version>2.3.1</jaxb-api.version>
+		<jaxb-impl.version>2.3.2</jaxb-impl.version>
+		<annotation-api.version>1.3.2</annotation-api.version>
+		<system-rules.version>1.19.0</system-rules.version>
+	</properties>
+	<modules>
+		<module>abstract-factory</module>
+		<module>tls</module>
+		<module>builder</module>
+		<module>factory-method</module>
+		<module>prototype</module>
+		<module>singleton</module>
+		<module>adapter</module>
+		<module>bridge</module>
+		<module>composite</module>
+		<module>dao</module>
+		<module>data-mapper</module>
+		<module>decorator</module>
+		<module>facade</module>
+		<module>flyweight</module>
+		<module>proxy</module>
+		<module>chain</module>
+		<module>command</module>
+		<module>interpreter</module>
+		<module>iterator</module>
+		<module>mediator</module>
+		<module>memento</module>
+		<module>model-view-presenter</module>
+		<module>observer</module>
+		<module>state</module>
+		<module>strategy</module>
+		<module>template-method</module>
+		<module>visitor</module>
+		<module>double-checked-locking</module>
+		<module>servant</module>
+		<module>service-locator</module>
+		<module>null-object</module>
+		<module>event-aggregator</module>
+		<module>callback</module>
+		<module>execute-around</module>
+		<module>property</module>
+		<module>intercepting-filter</module>
+		<module>producer-consumer</module>
+		<module>pipeline</module>
+		<module>poison-pill</module>
+		<module>reader-writer-lock</module>
+		<module>lazy-loading</module>
+		<module>service-layer</module>
+		<module>specification</module>
+		<module>tolerant-reader</module>
+		<module>model-view-controller</module>
+		<module>flux</module>
+		<module>double-dispatch</module>
+		<module>multiton</module>
+		<module>resource-acquisition-is-initialization</module>
+		<module>thread-pool</module>
+		<module>twin</module>
+		<module>private-class-data</module>
+		<module>object-pool</module>
+		<module>dependency-injection</module>
+		<module>naked-objects</module>
+		<module>front-controller</module>
+		<module>repository</module>
+		<module>async-method-invocation</module>
+		<module>monostate</module>
+		<module>step-builder</module>
+		<module>business-delegate</module>
+		<module>half-sync-half-async</module>
+		<module>layers</module>
+		<module>eip-message-channel</module>
+		<module>fluentinterface</module>
+		<module>reactor</module>
+		<module>caching</module>
+		<module>eip-publish-subscribe</module>
+		<module>delegation</module>
+		<module>event-driven-architecture</module>
+		<module>api-gateway</module>
+		<module>factory-kit</module>
+		<module>feature-toggle</module>
+		<module>value-object</module>
+		<module>module</module>
+		<module>monad</module>
+		<module>mute-idiom</module>
+		<module>mutex</module>
+		<module>semaphore</module>
+		<module>hexagonal</module>
+		<module>abstract-document</module>
+		<module>aggregator-microservices</module>
+		<module>promise</module>
+		<module>page-object</module>
+		<module>event-asynchronous</module>
+		<module>event-queue</module>
+		<module>queue-load-leveling</module>
+		<module>object-mother</module>
+		<module>data-bus</module>
+		<module>converter</module>
+		<module>guarded-suspension</module>
+		<module>balking</module>
+		<module>extension-objects</module>
+		<module>marker</module>
+		<module>cqrs</module>
+		<module>event-sourcing</module>
+		<module>data-transfer-object</module>
+		<module>throttling</module>
+		<module>unit-of-work</module>
+		<module>partial-response</module>
+		<module>eip-wire-tap</module>
+		<module>eip-splitter</module>
+		<module>eip-aggregator</module>
+		<module>retry</module>
+		<module>dirty-flag</module>
+		<module>trampoline</module>
+		<module>serverless</module>
+		<module>ambassador</module>
+		<module>acyclic-visitor</module>
+		<module>collection-pipeline</module>
+		<module>master-worker-pattern</module>
+		<module>spatial-partition</module>
+		<module>priority-queue</module>
+		<module>commander</module>
+		<module>typeobjectpattern</module>
+		<module>bytecode</module>
+		<module>leader-election</module>
+		<module>data-locality</module>
+		<module>subclass-sandbox</module>
+		<module>circuit-breaker</module>
+		<module>role-object</module>
 		<module>saga</module>
-        <module>double-buffer</module>
-        <module>sharding</module>
-        <module>game-loop</module>
-    </modules>
-
-    <repositories>
-        <repository>
-            <id>jitpack.io</id>
-            <url>https://jitpack.io</url>
-        </repository>
-    </repositories>
-
-    <dependencyManagement>
-        <dependencies>
-            <dependency>
-                <groupId>org.hibernate</groupId>
-                <artifactId>hibernate-core</artifactId>
-                <version>${hibernate.version}</version>
-            </dependency>
-            <dependency>
-                <groupId>org.springframework.boot</groupId>
-                <artifactId>spring-boot-dependencies</artifactId>
-                <version>${spring-boot.version}</version>
-                <type>pom</type>
-                <scope>import</scope>
-            </dependency>
-            <dependency>
-                <groupId>org.springframework.data</groupId>
-                <artifactId>spring-data-jpa</artifactId>
-                <version>${spring-data.version}</version>
-            </dependency>
-            <dependency>
-                <groupId>org.springframework</groupId>
-                <artifactId>spring-webmvc</artifactId>
-                <version>${spring.version}</version>
-            </dependency>
-            <dependency>
-                <groupId>com.h2database</groupId>
-                <artifactId>h2</artifactId>
-                <version>${h2.version}</version>
-            </dependency>
-            <dependency>
-                <groupId>commons-dbcp</groupId>
-                <artifactId>commons-dbcp</artifactId>
-                <version>${commons-dbcp.version}</version>
-            </dependency>
-            <dependency>
-                <groupId>org.apache.camel</groupId>
-                <artifactId>camel-core</artifactId>
-                <version>${camel.version}</version>
-            </dependency>
-            <dependency>
-                <groupId>org.apache.camel</groupId>
-                <artifactId>camel-stream</artifactId>
-                <version>${camel.version}</version>
-            </dependency>
-            <dependency>
-                <groupId>junit</groupId>
-                <artifactId>junit</artifactId>
-                <version>${junit.version}</version>
-                <scope>test</scope>
-            </dependency>
-            <dependency>
-                <groupId>org.junit.jupiter</groupId>
-                <artifactId>junit-jupiter-api</artifactId>
-                <version>${junit-jupiter.version}</version>
-                <scope>test</scope>
-            </dependency>
-            <dependency>
-                <groupId>org.junit.jupiter</groupId>
-                <artifactId>junit-jupiter-engine</artifactId>
-                <version>${junit-jupiter.version}</version>
-                <scope>test</scope>
-            </dependency>
-            <dependency>
-                <groupId>org.junit.jupiter</groupId>
-                <artifactId>junit-jupiter-params</artifactId>
-                <version>${junit-jupiter.version}</version>
-                <scope>test</scope>
-            </dependency>
-            <dependency>
-                <groupId>org.junit.jupiter</groupId>
-                <artifactId>junit-jupiter-migrationsupport</artifactId>
-                <version>${junit-jupiter.version}</version>
-                <scope>test</scope>
-            </dependency>
-            <dependency>
-                <groupId>org.junit.vintage</groupId>
-                <artifactId>junit-vintage-engine</artifactId>
-                <version>${junit-vintage.version}</version>
-                <scope>test</scope>
-            </dependency>
-            <dependency>
-                <groupId>com.github.sbrannen</groupId>
-                <artifactId>spring-test-junit5</artifactId>
-                <version>${sping-test-junit5.version}</version>
-                <scope>test</scope>
-            </dependency>
-            <dependency>
-                <groupId>org.mockito</groupId>
-                <artifactId>mockito-core</artifactId>
-                <version>${mockito.version}</version>
-                <scope>test</scope>
-            </dependency>
-            <dependency>
-                <groupId>com.google.guava</groupId>
-                <artifactId>guava</artifactId>
-                <version>${guava.version}</version>
-            </dependency>
-            <dependency>
-                <groupId>net.sourceforge.htmlunit</groupId>
-                <artifactId>htmlunit</artifactId>
-                <version>${htmlunit.version}</version>
-            </dependency>
-            <dependency>
-                <groupId>com.google.inject</groupId>
-                <artifactId>guice</artifactId>
-                <version>${guice.version}</version>
-            </dependency>
-            <dependency>
-                <groupId>org.mongodb</groupId>
-                <artifactId>mongo-java-driver</artifactId>
-                <version>${mongo-java-driver.version}</version>
-            </dependency>
-            <dependency>
-                <groupId>javax.xml.bind</groupId>
-                <artifactId>jaxb-api</artifactId>
-                <version>${jaxb-api.version}</version>
-            </dependency>
-            <dependency>
-                <groupId>javax.annotation</groupId>
-                <artifactId>javax.annotation-api</artifactId>
-                <version>${annotation-api.version}</version>
-            </dependency>
-            <dependency>
-                <groupId>com.sun.xml.bind</groupId>
-                <artifactId>jaxb-impl</artifactId>
-                <version>${jaxb-impl.version}</version>
-            </dependency>
-            <dependency>
-                <groupId>org.javassist</groupId>
-                <artifactId>javassist</artifactId>
-                <version>3.25.0-GA</version>
-            </dependency>
-            <dependency>
-                <groupId>com.github.stefanbirkner</groupId>
-                <artifactId>system-rules</artifactId>
-                <version>${system-rules.version}</version>
-                <scope>test</scope>
-            </dependency>
-        </dependencies>
-    </dependencyManagement>
-
-    <dependencies>
-        <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-api</artifactId>
-            <version>${slf4j.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>ch.qos.logback</groupId>
-            <artifactId>logback-classic</artifactId>
-            <version>${logback.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>ch.qos.logback</groupId>
-            <artifactId>logback-core</artifactId>
-            <version>${logback.version}</version>
-        </dependency>
-    </dependencies>
+		<module>double-buffer</module>
+		<module>sharding</module>
+		<module>game-loop</module>
+	</modules>
 
-    <build>
-        <pluginManagement>
-            <plugins>
-                <plugin>
-                    <groupId>org.apache.maven.plugins</groupId>
-                    <artifactId>maven-compiler-plugin</artifactId>
-                    <version>${compiler.version}</version>
-                    <configuration>
-                        <source>11</source>
-                        <target>11</target>
-                    </configuration>
-                </plugin>
-                <plugin>
-                    <groupId>org.apache.maven.plugins</groupId>
-                    <artifactId>maven-surefire-plugin</artifactId>
-                    <version>3.0.0-M3</version>
-                    <configuration>
-                        <argLine>-Xmx1024M ${argLine}</argLine>
-                    </configuration>
-                </plugin>
-                <plugin>
-                    <groupId>org.springframework.boot</groupId>
-                    <artifactId>spring-boot-maven-plugin</artifactId>
-                    <version>${spring-boot.version}</version>
-                </plugin>
-            </plugins>
-        </pluginManagement>
+	<repositories>
+		<repository>
+			<id>jitpack.io</id>
+			<url>https://jitpack.io</url>
+		</repository>
+	</repositories>
 
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-checkstyle-plugin</artifactId>
-                <version>3.1.0</version>
-                <executions>
-                    <execution>
-                        <id>validate</id>
-                        <goals>
-                            <goal>check</goal>
-                        </goals>
-                        <phase>validate</phase>
-                        <configuration>
-                            <configLocation>google_checks.xml</configLocation>
-                            <suppressionsLocation>checkstyle-suppressions.xml</suppressionsLocation>
-                            <encoding>UTF-8</encoding>
-                            <failOnViolation>true</failOnViolation>
-                            <violationSeverity>warning</violationSeverity>
-                            <includeTestSourceDirectory>false</includeTestSourceDirectory>
-                        </configuration>
-                    </execution>
-                </executions>
-            </plugin>
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.hibernate</groupId>
+				<artifactId>hibernate-core</artifactId>
+				<version>${hibernate.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-dependencies</artifactId>
+				<version>${spring-boot.version}</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+			<dependency>
+				<groupId>org.springframework.data</groupId>
+				<artifactId>spring-data-jpa</artifactId>
+				<version>${spring-data.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>org.springframework</groupId>
+				<artifactId>spring-webmvc</artifactId>
+				<version>${spring.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>com.h2database</groupId>
+				<artifactId>h2</artifactId>
+				<version>${h2.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>commons-dbcp</groupId>
+				<artifactId>commons-dbcp</artifactId>
+				<version>${commons-dbcp.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>org.apache.camel</groupId>
+				<artifactId>camel-core</artifactId>
+				<version>${camel.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>org.apache.camel</groupId>
+				<artifactId>camel-stream</artifactId>
+				<version>${camel.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>junit</groupId>
+				<artifactId>junit</artifactId>
+				<version>${junit.version}</version>
+				<scope>test</scope>
+			</dependency>
+			<dependency>
+				<groupId>org.junit.jupiter</groupId>
+				<artifactId>junit-jupiter-api</artifactId>
+				<version>${junit-jupiter.version}</version>
+				<scope>test</scope>
+			</dependency>
+			<dependency>
+				<groupId>org.junit.jupiter</groupId>
+				<artifactId>junit-jupiter-engine</artifactId>
+				<version>${junit-jupiter.version}</version>
+				<scope>test</scope>
+			</dependency>
+			<dependency>
+				<groupId>org.junit.jupiter</groupId>
+				<artifactId>junit-jupiter-params</artifactId>
+				<version>${junit-jupiter.version}</version>
+				<scope>test</scope>
+			</dependency>
+			<dependency>
+				<groupId>org.junit.jupiter</groupId>
+				<artifactId>junit-jupiter-migrationsupport</artifactId>
+				<version>${junit-jupiter.version}</version>
+				<scope>test</scope>
+			</dependency>
+			<dependency>
+				<groupId>org.junit.vintage</groupId>
+				<artifactId>junit-vintage-engine</artifactId>
+				<version>${junit-vintage.version}</version>
+				<scope>test</scope>
+			</dependency>
+			<dependency>
+				<groupId>com.github.sbrannen</groupId>
+				<artifactId>spring-test-junit5</artifactId>
+				<version>${sping-test-junit5.version}</version>
+				<scope>test</scope>
+			</dependency>
+			<dependency>
+				<groupId>org.mockito</groupId>
+				<artifactId>mockito-core</artifactId>
+				<version>${mockito.version}</version>
+				<scope>test</scope>
+			</dependency>
+			<dependency>
+				<groupId>com.google.guava</groupId>
+				<artifactId>guava</artifactId>
+				<version>${guava.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>net.sourceforge.htmlunit</groupId>
+				<artifactId>htmlunit</artifactId>
+				<version>${htmlunit.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>com.google.inject</groupId>
+				<artifactId>guice</artifactId>
+				<version>${guice.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>org.mongodb</groupId>
+				<artifactId>mongo-java-driver</artifactId>
+				<version>${mongo-java-driver.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>javax.xml.bind</groupId>
+				<artifactId>jaxb-api</artifactId>
+				<version>${jaxb-api.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>javax.annotation</groupId>
+				<artifactId>javax.annotation-api</artifactId>
+				<version>${annotation-api.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>com.sun.xml.bind</groupId>
+				<artifactId>jaxb-impl</artifactId>
+				<version>${jaxb-impl.version}</version>
+			</dependency>
+			<dependency>
+				<groupId>org.javassist</groupId>
+				<artifactId>javassist</artifactId>
+				<version>3.25.0-GA</version>
+			</dependency>
+			<dependency>
+				<groupId>com.github.stefanbirkner</groupId>
+				<artifactId>system-rules</artifactId>
+				<version>${system-rules.version}</version>
+				<scope>test</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
 
-            <!-- Resolves ${projectRoot} to the project root directory.
-                Used by the license-maven-plugin to find the correct location of
-                license-plugin-header-style.xml when built from a submodule directory. -->
-            <plugin>
-                <groupId>org.commonjava.maven.plugins</groupId>
-                <artifactId>directory-maven-plugin</artifactId>
-                <version>0.3.1</version>
-                <executions>
-                    <execution>
-                        <id>directories</id>
-                        <goals>
-                            <goal>directory-of</goal>
-                        </goals>
-                        <phase>initialize</phase>
-                        <configuration>
-                            <property>projectRoot</property>
-                            <project>
-                                <groupId>com.iluwatar</groupId>
-                                <artifactId>java-design-patterns</artifactId>
-                            </project>
-                        </configuration>
-                    </execution>
-                </executions>
-            </plugin>
+	<dependencies>
+		<dependency>
+			<groupId>org.slf4j</groupId>
+			<artifactId>slf4j-api</artifactId>
+			<version>${slf4j.version}</version>
+		</dependency>
+		<dependency>
+			<groupId>ch.qos.logback</groupId>
+			<artifactId>logback-classic</artifactId>
+			<version>${logback.version}</version>
+		</dependency>
+		<dependency>
+			<groupId>ch.qos.logback</groupId>
+			<artifactId>logback-core</artifactId>
+			<version>${logback.version}</version>
+		</dependency>
+	</dependencies>
 
-            <plugin>
-                <groupId>com.mycila</groupId>
-                <artifactId>license-maven-plugin</artifactId>
-                <version>3.0</version>
-                <configuration>
-                    <header>com/mycila/maven/plugin/license/templates/MIT.txt</header>
-                    <properties>
-                        <owner>Ilkka Seppälä</owner>
-                    </properties>
-                    <skipExistingHeaders>true</skipExistingHeaders>
-                    <headerDefinitions>
-                        <headerDefinition>${projectRoot}${file.separator}license-plugin-header-style.xml</headerDefinition>
-                    </headerDefinitions>
-                    <mapping>
-                        <java>SLASHSTAR_CUSTOM_STYLE</java>
-                    </mapping>
-                    <excludes>
-                        <exclude>.github/FUNDING.yml</exclude>
-                    </excludes>
-                </configuration>
-                <executions>
-                    <execution>
-                        <id>install-format</id>
-                        <phase>install</phase>
-                        <goals>
-                            <goal>format</goal>
-                        </goals>
-                    </execution>
-                </executions>
-            </plugin>
+	<build>
+		<pluginManagement>
+			<plugins>
+				<plugin>
+					<groupId>org.apache.maven.plugins</groupId>
+					<artifactId>maven-compiler-plugin</artifactId>
+					<version>${compiler.version}</version>
+					<configuration>
+						<source>11</source>
+						<target>11</target>
+					</configuration>
+				</plugin>
+				<plugin>
+					<groupId>org.apache.maven.plugins</groupId>
+					<artifactId>maven-surefire-plugin</artifactId>
+					<version>3.0.0-M3</version>
+					<configuration>
+						<argLine>-Xmx1024M ${argLine}</argLine>
+					</configuration>
+				</plugin>
+				<plugin>
+					<groupId>org.springframework.boot</groupId>
+					<artifactId>spring-boot-maven-plugin</artifactId>
+					<version>${spring-boot.version}</version>
+				</plugin>
+				<!-- Maven assembly plugin template for all child project to follow -->
+				<plugin>
+					<groupId>org.apache.maven.plugins</groupId>
+					<artifactId>maven-assembly-plugin</artifactId>
+					<executions>
+						<execution>
+							<phase>package</phase>
+							<goals>
+								<goal>single</goal>
+							</goals>
+							<configuration>
+								<descriptorRefs>
+									<descriptorRef>jar-with-dependencies</descriptorRef>
+								</descriptorRefs>
+								<!-- below two line make sure the fat jar is sharing the same name 
+									as of project name -->
+								<finalName>${project.artifactId}</finalName>
+								<appendAssemblyId>false</appendAssemblyId>
+							</configuration>
+						</execution>
+					</executions>
+				</plugin>
+			</plugins>
+		</pluginManagement>
 
-            <plugin>
-                <groupId>org.jacoco</groupId>
-                <artifactId>jacoco-maven-plugin</artifactId>
-                <version>${jacoco.version}</version>
-                <executions>
-                    <execution>
-                        <id>prepare-agent</id>
-                        <goals>
-                            <goal>prepare-agent</goal>
-                        </goals>
-                    </execution>
-                    <execution>
-                        <id>report</id>
-                        <goals>
-                            <goal>report</goal>
-                        </goals>
-                    </execution>
-                </executions>
-            </plugin>
+		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-checkstyle-plugin</artifactId>
+				<version>3.1.0</version>
+				<executions>
+					<execution>
+						<id>validate</id>
+						<goals>
+							<goal>check</goal>
+						</goals>
+						<phase>validate</phase>
+						<configuration>
+							<configLocation>google_checks.xml</configLocation>
+							<suppressionsLocation>checkstyle-suppressions.xml</suppressionsLocation>
+							<encoding>UTF-8</encoding>
+							<failOnViolation>true</failOnViolation>
+							<violationSeverity>warning</violationSeverity>
+							<includeTestSourceDirectory>false</includeTestSourceDirectory>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
 
-        </plugins>
-    </build>
+			<!-- Resolves ${projectRoot} to the project root directory. Used by the 
+				license-maven-plugin to find the correct location of license-plugin-header-style.xml 
+				when built from a submodule directory. -->
+			<plugin>
+				<groupId>org.commonjava.maven.plugins</groupId>
+				<artifactId>directory-maven-plugin</artifactId>
+				<version>0.3.1</version>
+				<executions>
+					<execution>
+						<id>directories</id>
+						<goals>
+							<goal>directory-of</goal>
+						</goals>
+						<phase>initialize</phase>
+						<configuration>
+							<property>projectRoot</property>
+							<project>
+								<groupId>com.iluwatar</groupId>
+								<artifactId>java-design-patterns</artifactId>
+							</project>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
+			<plugin>
+				<groupId>com.mycila</groupId>
+				<artifactId>license-maven-plugin</artifactId>
+				<version>3.0</version>
+				<configuration>
+					<header>com/mycila/maven/plugin/license/templates/MIT.txt</header>
+					<properties>
+						<owner>Ilkka Seppälä</owner>
+					</properties>
+					<skipExistingHeaders>true</skipExistingHeaders>
+					<headerDefinitions>
+						<headerDefinition>${projectRoot}${file.separator}license-plugin-header-style.xml</headerDefinition>
+					</headerDefinitions>
+					<mapping>
+						<java>SLASHSTAR_CUSTOM_STYLE</java>
+					</mapping>
+					<excludes>
+						<exclude>.github/FUNDING.yml</exclude>
+					</excludes>
+				</configuration>
+				<executions>
+					<execution>
+						<id>install-format</id>
+						<phase>install</phase>
+						<goals>
+							<goal>format</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
 
-    <reporting>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-jxr-plugin</artifactId>
-                <version>3.0.0</version>
-            </plugin>
-        </plugins>
-    </reporting>
+			<plugin>
+				<groupId>org.jacoco</groupId>
+				<artifactId>jacoco-maven-plugin</artifactId>
+				<version>${jacoco.version}</version>
+				<executions>
+					<execution>
+						<id>prepare-agent</id>
+						<goals>
+							<goal>prepare-agent</goal>
+						</goals>
+					</execution>
+					<execution>
+						<id>report</id>
+						<goals>
+							<goal>report</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
+		</plugins>
+	</build>
+	<reporting>
+		<plugins>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-jxr-plugin</artifactId>
+				<version>3.0.0</version>
+			</plugin>
+		</plugins>
+	</reporting>
 
 </project>