Spring Loading a project with multiple modules with Gradle does not create

Question

I am working on a Spring application to load with several modules, and we use Gradle to create it. Unfortunately, I cannot get the Gradle configuration.

The structure of the project is as follows:

parent
  |
  + build.gradle
  |
  + settings.gradle
  |
  + core
  |   |
  |   + build.gradle
  | 
  + apis
  |   |
  |   + build.gradle
  |
  + services
  |   |
  |   + build.gradle
  | 
  + data
  |   |
  |   + build.gradle

When I try to build a project, I get compilation errors, such as error: cannot find symbolsaying that classes from the data used in services are not imported. And I assume that this is true for all modules.

My parent build.gradle looks like this:

buildscript {
    ext {
        springBootVersion = '2.0.0.BUILD-SNAPSHOT'
    }
    repositories {
        mavenCentral()
        maven { url "https://repo.spring.io/snapshot" }
        maven { url "https://repo.spring.io/milestone" }
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
    }
}

apply plugin: 'eclipse'
apply plugin: 'idea'

allprojects {
    apply plugin: 'java'
    apply plugin: 'org.springframework.boot'
    apply plugin: 'io.spring.dependency-management'

    group = 'com.example'
    version = '0.0.1-SNAPSHOT'
    sourceCompatibility = 1.8
    targetCompatibility = 1.8

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

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

dependencies {
    compile project(':data')
    compile project(':services')
    compile project(':apis')
    compile project(':core')
}

jar {
    baseName = 'my-jar'
    version = '0.0.1-SNAPSHOT'
}

settings.gradle:

rootProject.name = 'my-app'
include ':apis'
include ':core'
include ':data'
include ':services'

one of the children (the kernel) has this in the build.gradle file:

dependencies {
    compile('org.springframework.boot:spring-boot-starter-actuator')
    compile('org.springframework.boot:spring-boot-starter-quartz')
    compile('org.springframework.boot:spring-boot-starter-tomcat')
    runtime('com.h2database:h2')

    compile project(':data')
    compile project(':services')
    compile project(':apis')
}

services build.gradle is as follows:

dependencies {
    compile('org.springframework.boot:spring-boot-starter-quartz')
    compile('org.springframework.boot:spring-boot-starter-data-jpa')
    runtime('com.h2database:h2')

    compile project(':data')
}

Others also declare only dependencies.

The structure of the dependencies is as follows:

core - apis, services, data

apis - services, data

services - data

data -

Example compilation errors:

/my-app/services/src/main/java/com/example/my-app/business/IssuedTokenService.java:3: error: package com.examples.data.dao does not exist import com.examples.data.dao.IssuedToken;

/my-app/services/src/main/java/com/example/my-app/business/IssuedTokenService.java:4: error: package com.examples.data.repository does not exist import com.examples.data.repository.IssuedTokenRepository;

/my-app/services/src/main/java/com/example/my-app/business/IssuedTokenService.java:12: error: cannot find symbol 
    private IssuedTokenRepository issuedTokenRepository;

    symbol:   class IssuedTokenRepository
   location: class IssuedTokenService

/my-app/services/src/main/java/com/example/my-app/business/IssuedTokenService.java:15: error: cannot find symbol
   public void saveToken(IssuedToken issuedToken) {
                                  ^
   symbol:   class IssuedToken
   location: class IssuedTokenService

Answer 1

():

bootJar {
    enabled = false
}

jar {
    enabled = true
}

Answer 2

.

Gradle :

"lib" - . jar .

, , .

, , B A, A org.springframework.boot org.springframework.boot, compile project(':A') , jar bootRepackage bootJar. , Gradle .

:

dependencies {
  compile project(':A').sourceSets.main.output
}

"" A .

Answer 3

bootJar {
    enabled = false
}

jar {
    enabled = true
}

. spring spring gradle . !

Answer 4

You should exclude org.springframework.bootfrom all submodules ( build.gradlefile root , allProjectsblock) that act as dependencies for your main module, which will build a fat-jar.

Include configuration dependencyManagementin all of your managed spring boot submodules:

dependencyManagement {
    imports {
        mavenBom "org.springframework.boot:spring-boot-starter-parent:${springBootVersion}"
    }
}

The cause of your problem is the lack of compiled jar submodule files inside your main fat-jar module.