Gradle compileJpaModelgenJava FAILED

Question

I have a Spring Boot (v1.4.2) Application with Spring Data JPA and Hibernate (5.0.11.Final if I'm not mistaken). I added the jpadmodelgen-plugin to generate the metamodel classes for me, because, you know, I'm lazy. Unfortunately, when I run gradle build I get some nasty errors. The curious thing about this is that doing gradle test (which does real unit and integration tests of the complete application) runs without an error. I can even run the app in IntelliJ and life's great. It's just that my butler Jenkins can't build it.

> gradle build
:initJpaModelgenSourcesDir
:compileJpaModelgen UP-TO-DATE
:compileJava UP-TO-DATE
:processResources UP-TO-DATE
:classes UP-TO-DATE
:findMainClass
:jar
:bootRepackage
:assemble
:compileJpaModelgenJava

Mapping_.java:3: error: cannot find symbol
import com.<snip>.model.domain.auth.Member;
                                   ^
  symbol:   class Member
  location: package com.<snip>.model.domain.auth
Mapping_.java:7: error: package javax.persistence.metamodel does not exist
import javax.persistence.metamodel.SingularAttribute;
                                  ^
Mapping_.java:8: error: package javax.persistence.metamodel does not exist
import javax.persistence.metamodel.StaticMetamodel;
                                  ^

100 errors
:compileJpaModelgenJava FAILED

FAILURE: Build failed with an exception.

The error shows that not only are my own classes not found but javax.persistence as well. Here's the build.gradle file.

buildscript {
    ext {
        springBootVersion = '1.4.2.RELEASE'
    }
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
        classpath('gradle.plugin.at.comm_unity.gradle.plugins:jpamodelgen-plugin:1.1.2')
    }
}

plugins {
    id "at.comm_unity.gradle.plugins.jpamodelgen" version "1.1.2"
}

apply plugin: 'java'
apply plugin: 'idea'
apply plugin: 'org.springframework.boot'
apply plugin: 'findbugs'
apply plugin: 'jacoco'

jar {
    baseName = 'services'
    version = '1.0.0'
}

sourceCompatibility = 1.8
targetCompatibility = 1.8

repositories {
    mavenCentral()
}

jpaModelgen {
    library = "org.hibernate:hibernate-jpamodelgen:5.0.11.Final"
    jpaModelgenSourcesDir = "src/generated/java"
}

findbugs {
    ignoreFailures = true
    reportLevel = 'low'
}

javadoc {
    failOnError = false
}

dependencies {
    // Spring Boot, some Apache Commons libs and JDBC Drivers.
}

sourceSets {
    unitTest {
        resources {
            srcDir "resources"
        }
    }
    /*generated {
        java.srcDir "${buildDir}/src/generated/java"
    }*/
}

compileJava.options.compilerArgs += ["-proc:none"]

Avengers Assemble! I need help, please.

score 6 · Accepted Answer · edited May 23 '17 at 12:25

I had hoped that there's someone out there that knows a solution to this problem that retains the plugin, but, as is apparent, there is not. I found a different way by not relying on the plugin, doing a bit more work myself.

My solution is based on this answer.

The plugin was removed.
Compile dependency to Hibernate's jpamodelgen.
Defined a variable generatedSourcesDir...
... that is added to the main java source-set.
Created a custom delete task removeGeneratedMetamodel that is required or otherwise there'll be odd compiler errors like this one.
Added some options to compileJava that generates the metamodel.
Added dependency to removeGeneratedMetamodel to compileJava and clean tasks.

Here's the build.gradle.

buildscript {
    ext {
        springBootVersion = '1.4.2.RELEASE'
    }
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
    }
}

apply plugin: 'java'
apply plugin: 'idea'
apply plugin: 'org.springframework.boot'
apply plugin: 'findbugs'
apply plugin: 'jacoco'

jar {
    baseName = 'services'
    version = '1.0.0'
}

sourceCompatibility = 1.8
targetCompatibility = 1.8

repositories {
    mavenCentral()
}

findbugs {
    ignoreFailures = true
    reportLevel = 'low'
}

javadoc {
    failOnError = false
}

dependencies {
    // Spring Boot, some Apache Commons libs and JDBC Drivers.

    compile group: 'org.hibernate', name: 'hibernate-jpamodelgen', version: '5.0.11.Final'
}

ext {
    generatedSourcesDir = file("src/main/java/generated")
}

sourceSets {
    unitTest {
        resources {
            srcDir "resources"
        }
    }
    main {
        java {
            srcDir 'src/main/java'
            srcDir generatedSourcesDir
        }
    }
}

task removeGeneratedMetamodel(type: Delete) {
    generatedSourcesDir.deleteDir()
}

compileJava {
    doFirst {
        generatedSourcesDir.mkdirs()
    }
    dependsOn(removeGeneratedMetamodel)
    options.compilerArgs += ['-s', generatedSourcesDir]
}

clean.dependsOn(removeGeneratedMetamodel)

score 0 · Answer 2 · answered Sep 26 '17 at 09:24

0

I had the same error.

I added the

compile group: 'javax.persistence', name: 'persistence-api', version: '1.0.2'

dependency, and that resolved the issue. I found this solution here.

answered Sep 26 '17 at 09:24

SiGe

341
6
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Gradle compileJpaModelgenJava FAILED

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