Spring boot parent module not updating upon changes on child module - spring

Question

I am new to spring boot. I have created a spring multi module project with spring boot version 2.2.5.RELEASE.
ModuleA
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.5.RELEASE</version>
</parent>
<groupId>com.module</groupId>
<artifactId>modules</artifactId>
<version>0.0.1</version>
<packaging>pom</packaging>
<name>modules</name>
<description>Module Services</description>
<modules>
<module>moduleA</module>
<module>moduleB</module>
</modules>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<type>pom</type>
<version>${spring.boot.version}</version>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>${spring.boot.version}</version>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
ModuleB
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.module</groupId>
<artifactId>modules</artifactId>
<version>0.0.1</version>
</parent>
<groupId>com.moduleA</groupId>
<artifactId>moduleA</artifactId>
<version>0.0.0.1</version>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>${spring.boot.version}</version>
</dependency>
</dependencies>
</project>
ModuleC
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>com.module</groupId>
<artifactId>modules</artifactId>
<version>0.0.1</version>
</parent>
<groupId>com.moduleB</groupId>
<artifactId>moduleB</artifactId>
<version>0.0.0.1</version>
<packaging>jar</packaging>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>${spring.boot.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
If I make any modification on ModuleB or ModuleC, these are not reflected in ModuleA.
I have tried the following two methods:
spring-boot:run
versions:set versions:update-child-modules -DnewVersion=0.0.2 -DprocessAllModules
How do I make the parent module update itself when updating sub-modules?

Answer 1

The modules should be organized in directories in the following structure:
module A
|___ module B
|___ module C
Note: In this setup module A is used only for module management. So, no sources except pom.xml should be defined in module A.
If you need only version propagation, then define dependencies for module B and module C in dependency management section of module A pom.xml and skip <version> in child modules:
<dependencyManagement>
<dependencies>
<!-- other dependencies -->
<dependency>
<groupId>your-package-here</groupId>
<artifactId>moduleB</artifactId>
<version>${project.version}</version>
</dependency>
<dependency>
<groupId>your-package-here</groupId>
<artifactId>moduleC</artifactId>
<version>${project.version}</version>
</dependency>
</dependencies>
</dependencyManagement>
If you want the changes in module B become available in module C - you should define artifacts for in module A (as in case above) and add dependency on module B in module C pom.xml:
<dependencies>
<!-- other dependencies -->
<dependency>
<groupId>your-package-here</groupId>
<artifactId>moduleB</artifactId>
</dependency>
</dependencies>