CODEWITHSUNDEEP
javagradleintellij-ideaproject
arkascha
arkascha

Reputation: 42915

Project setup in IntelliJ IDEA for three java modules, one used as a module for the other two

I am trying to setup a multi module java project based on Gradle in IntelliJ IDEA:

Three modules (I guess), one meant as a library that is used by the two other modules. I fail to get the project configuration right, maybe someone can give me a hint here:

Depending on how I reference the library module from the other modules I manage to get the syntax highlighting find the referenced (imported) classes, but that does not work for the compiler, that one still complains about classes not found. So I guess my question is: what is the right approach to reference the classes in the library module from the other two modules in the project structure setup?

This is the setup: 

/..../pow/library
         /spring
         /droid

setup.gradle: 

rootProject.name = 'pow'

include 'library'
include 'spring'
include 'droid'

build.gradle:

group 'org.rustygnome.pow'
version '1.0-SNAPSHOT'

allprojects {
    group 'org.rustygnome.pow'
    version '1.0-SNAPSHOT'
}

repositories {
    mavenCentral()
}

dependencies {
}

library/build.gradle:

apply plugin: 'java'

//sourceCompatibility = 1.8

repositories {
    mavenCentral()
}

dependencies {
    compile 'org.json:json:20171018'
    compile 'com.googlecode.json-simple:json-simple:1.1.1'
    compile files('/home/arkascha/Projects/Android/Sdk/platforms/android-26/android.jar')
    testCompile group: 'junit', name: 'junit', version: '4.12'
}

spring/build.gradle:

buildscript {
    ext {
        springBootVersion = '2.0.1.BUILD-SNAPSHOT'
    }
    repositories {
        mavenCentral()
        maven { url "https://repo.spring.io/snapshot" }
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
    }
}

apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'idea'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'

bootJar {
    mainClassName = 'org.rustygnome.pow.spring.Application'
    baseName = 'pow-spring-boot'
    version =  '0.1.0'
}

sourceCompatibility = 1.8
targetCompatibility = 1.8

repositories {
    mavenCentral()
    maven { url "https://repo.spring.io/snapshot" }
}

dependencies {
    compile('org.springframework.boot:spring-boot-starter')
    runtime('org.springframework.boot:spring-boot-devtools')
    testCompile('org.springframework.boot:spring-boot-starter-test')
}

Using that setup I want to assemble the spring module. In that modules sources I reference a class from the library module:

Application.java: 

package org.rustygnome.pow.spring;

import org.rustygnome.pow.lib.config.Config;
// other imports

@SpringBootApplication
public class Application implements ApplicationRunner {

    static ApplicationContext appContext;
    static ThreadPoolTaskExecutor taskExecutor;

    Config config; // this one references 
// further stuff

The library module is built, no issues there.

But when I try to build the spring module I get:

11:14:38 AM: Executing task 'build'...

/data/Projects/pow/spring/src/main/java/org/rustygnome/pow/spring/Application.java:3:

error: package org.rustygnome.pow.lib.config does not exist

import org.rustygnome.pow.lib.config.Config;

// ... further issues...

Upvotes: 0

Views: 230

Answers (1)

CrazyCoder
CrazyCoder

Reputation: 401965

Composite builds seems to be what you need.

Gradle reference for the composite builds feature.

You can also use Multi-Projects.

Upvotes: 1

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