GORM not bootstrapping from JAR - spring

Question

Replacing a persistence layer in legacy app with a JAR file using Spring, Hibernate and GORM. Methods like person.save() work fine when running agains project with Gradle etc. in project. However, after I build the fat jar and reference it with -cp my-big-fat-gorm.jar I get:
java.lang.IllegalStateException: Method on class [blah.Person] was
used outside of a Grails application. If running in the context of a
test using the mocking API or bootstrap Grails correctly.
Using Spring boot for Spring, Hibernate4 and GORM and build.gradle file show below...
apply plugin: 'java'
apply plugin: 'groovy'
apply plugin: 'application'
mainClassName = "blah.App"
jar {
baseName = 'blah-gorm'
version = '1.0-SNAPSHOT'
from {
configurations.compile.collect {
it.isDirectory() ? it : zipTree(it)
}
configurations.runtime.collect {
it.isDirectory() ? it : zipTree(it)
}
}
}
repositories {
mavenLocal()
mavenCentral()
}
dependencies {
testCompile group: 'junit', name: 'junit', version: '4.8.2'
compile 'org.grails:gorm-hibernate4-spring-boot:1.1.0.RELEASE'
compile 'org.slf4j:slf4j-simple:1.7.7'
runtime 'com.h2database:h2:1.4.181'
}
Am I missing something in the JAR file creation that causes Spring boot to honor #Entity etc.?
Here is a GitHub project that illustrates this and should allow you to execute and see the same stuff I'm seeing.
https://github.com/twcrone/spring-gorm-jar

Answer 1

You don't have the Spring Boot Gradle plugin installed so you're not actually creating a fat JAR you need to add the following to your build.gradle file:
apply plugin: 'spring-boot'
buildscript {
ext {
springBootVersion = '1.1.0.M2'
groovyVersion = '2.3.2'
}
repositories {
mavenCentral()
maven {
url 'http://repo.spring.io/milestone'
}
}
dependencies {
classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
}
}
With this in place doing gradle assemble and then java -jar ... results in bootstrapping GORM correctly