Spring boot multi modules project example

How to build?

Run mvn package in root directory.
On result, we have archive, includes a folder with dependency jars (lib folder) and spring-boot-multi-modules.jar

Artifact tree

  spring-boot-multi-modules
  │   spring-boot-multi-modules.jar
  └───lib
      antlr-2.7.7.jar
      aspectjweaver-1.9.6.jar
      byte-buddy-1.10.17.jar
      checker-qual-3.5.0.jar
      classmate-1.5.1.jar
      data-transport-2.0-SNAPSHOT.jar
      db-service-1.0-SNAPSHOT.jar
      dom4j-2.1.3.jar
      hibernate-commons-annotations-5.1.0.Final.jar
      hibernate-core-5.4.22.Final.jar
      HikariCP-3.4.5.jar
      istack-commons-runtime-3.0.11.jar
      jackson-annotations-2.11.3.jar
      jackson-core-2.11.3.jar
      jackson-databind-2.11.3.jar
      jackson-datatype-jdk8-2.11.3.jar
      jackson-datatype-jsr310-2.11.3.jar
      jackson-module-parameter-names-2.11.3.jar
      jakarta.activation-1.2.2.jar
      jakarta.annotation-api-1.3.5.jar
      jakarta.el-3.0.3.jar
      jakarta.persistence-api-2.2.3.jar
      jakarta.transaction-api-1.3.3.jar
      jakarta.xml.bind-api-2.3.3.jar
      jandex-2.1.3.Final.jar
      javassist-3.24.0-GA.jar
      jaxb-runtime-2.3.3.jar
      jboss-logging-3.4.1.Final.jar
      jul-to-slf4j-1.7.30.jar
      log4j-api-2.13.3.jar
      log4j-to-slf4j-2.13.3.jar
      logback-classic-1.2.3.jar
      logback-core-1.2.3.jar
      postgresql-42.2.18.jar
      slf4j-api-1.7.30.jar
      snakeyaml-1.26.jar
      spring-aop-5.2.10.RELEASE.jar
      spring-aspects-5.2.10.RELEASE.jar
      spring-beans-5.2.10.RELEASE.jar
      spring-boot-2.3.5.RELEASE.jar
      spring-boot-autoconfigure-2.3.5.RELEASE.jar
      spring-boot-starter-2.3.5.RELEASE.jar
      spring-boot-starter-aop-2.3.5.RELEASE.jar
      spring-boot-starter-data-jpa-2.3.5.RELEASE.jar
      spring-boot-starter-jdbc-2.3.5.RELEASE.jar
      spring-boot-starter-json-2.3.5.RELEASE.jar
      spring-boot-starter-logging-2.3.5.RELEASE.jar
      spring-boot-starter-tomcat-2.3.5.RELEASE.jar
      spring-boot-starter-web-2.3.5.RELEASE.jar
      spring-context-5.2.10.RELEASE.jar
      spring-core-5.2.10.RELEASE.jar
      spring-data-commons-2.3.5.RELEASE.jar
      spring-data-jpa-2.3.5.RELEASE.jar
      spring-expression-5.2.10.RELEASE.jar
      spring-jcl-5.2.10.RELEASE.jar
      spring-jdbc-5.2.10.RELEASE.jar
      spring-orm-5.2.10.RELEASE.jar
      spring-tx-5.2.10.RELEASE.jar
      spring-web-5.2.10.RELEASE.jar
      spring-webmvc-5.2.10.RELEASE.jar
      tomcat-embed-core-9.0.39.jar
      tomcat-embed-websocket-9.0.39.jar
      txw2-2.3.3.jar
      web-api-1.0-SNAPSHOT.jar

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How to run?

Run spring-boot-multi-modules.jar in application module.

Example:

java -jar spring-boot-multi-modules.jar

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What problem does this structure solve?

Comparing with packages structure, multi modules project very simple keep parallel develop. We have more possibilities for reusing, testing and supporting

Application structure

• app - directories for configuration files, dockerfile, shell, and any files for develop environment.
• app/assembly - configurer files for build project.
• app/bin - shell scrips for start application.
• application - This is main project module. Responsible for assembling the configuration and run the application(maven profiles, application.yml and etc).
• application-bom - This module is responsible for managing versions of project modules.
• data-transport - Communication with other applications over rest, rpc and other(Get data over feign client or sring rest template and etc).
• db-service - Persistence layer(persistence, spring-data-jpa, spring jdbc, migration plugins, migration sql scripts and etc).
• web-api - Application api(Swager, RestController, WebSocket and etc).