Querydsl Annotation Processor issue after upgrade to Gradle 5

问题

I have a gradle script which generates querydsl classes from Mongo annotated entities. It was working so far, but after upgrade to Gradle 5 I have a problem with:

* What went wrong:
Execution failed for task ':myproject-common:compileQuerydsl'.
Annotation processor 'org.springframework.data.mongodb.repository.support.MongoAnnotationProcessor' not found

Please find my gradle.build script below. Any ideas what could be wrong? I read that there was change in Gradle 5 that annotation processors are not used by default during compilation and annotationProcessor declaration should be added but when I add it to dependencies the same error occurs.

plugins {
    id 'org.springframework.boot' version '2.0.4.RELEASE'
    id "com.ewerk.gradle.plugins.querydsl" version "1.0.10"
}
repositories {
    mavenCentral()
}
apply plugin: 'java'
apply plugin: 'io.spring.dependency-management'
jar {
    enabled = true
    baseName = 'myproject-common'
    version =  '0.0.1-SNAPSHOT'
}
// do no package commons into fat jar
bootJar {
    enabled = false
}
querydsl {
    library = 'com.querydsl:querydsl-apt:4.1.4'
    querydslSourcesDir = 'src/main/querydsl'
    springDataMongo = true
}
sourceCompatibility = 11.0
targetCompatibility = 11.0
sourceSets {
    main {
        java {
            srcDirs = ['src/main/java', 'src/main/querydsl']
        }
    }
}
dependencies {
    compile("org.springframework.boot:spring-boot-starter-web")
    compile("org.springframework.data:spring-data-mongodb")
    compile("org.springframework.boot:spring-boot-starter-data-rest")
    compile("org.springframework.boot:spring-boot-starter-security")
    compile("com.fasterxml.jackson.datatype:jackson-datatype-    jsr310:2.8.6")
    compile("com.google.guava:guava:23.0")
    compile("commons-io:commons-io:2.5")
    compile("org.aspectj:aspectjweaver:1.8.9")
    compile("org.apache.commons:commons-lang3:3.5")
    compile("commons-collections:commons-collections:3.2.2")
    compile("org.javamoney:moneta:1.1")
    compile("com.fizzed:rocker-runtime:1.2.0")
    compile("com.querydsl:querydsl-core:4.1.4")
    compile("com.querydsl:querydsl-mongodb:4.1.4")
    compile("com.querydsl:querydsl-apt:4.1.4")
    compile("com.codepoetics:protonpack:1.15")

    testCompile("org.springframework.boot:spring-boot-starter-test")
    testCompile("org.assertj:assertj-core:3.7.0")
}

回答1:

I have finally found a workaround. Querydsl's lack of compatibility with Gradle 5 is reported here as a bug: https://github.com/ewerk/gradle-plugins/issues/108

Workaround is to add to gradle script:

compileQuerydsl {
    options.annotationProcessorPath = configurations.querydsl
}

回答2:

This is my working configuration for JPA without using additional plugins. Gradle 5.3, openjdk 11.0.2.

plugins {
    id 'java-library'
}

ext {
    springBootVersion = '2.2.0.M1'
    queryDslVersion = '4.2.1'
}

dependencies {
    api(
            "com.querydsl:querydsl-jpa:$queryDslVersion"
    )

    implementation(
            platform("org.springframework.boot:spring-boot-dependencies:$springBootVersion"),
            'org.springframework.boot:spring-boot-starter-validation',
            'org.springframework.boot:spring-boot-starter-data-jpa',
            'org.liquibase:liquibase-core',
            'org.postgresql:postgresql'
    )

    annotationProcessor(
            platform("org.springframework.boot:spring-boot-dependencies:$springBootVersion"),
            'jakarta.persistence:jakarta.persistence-api',
            'jakarta.annotation:jakarta.annotation-api',
            "com.querydsl:querydsl-apt:$queryDslVersion:jpa"

    )
}

Please pay attention to the annotation processor. It has suffix ":jpa". Probably this is what you missed. To activate the same one for mongodb you should add ":morphia" suffix.

Please also look at these 2 dependencies:

'jakarta.persistence:jakarta.persistence-api'
'jakarta.annotation:jakarta.annotation-api'

This is a workaround for the issue described here: https://discuss.gradle.org/t/annotationprocessor-querydsl-java-lang-noclassdeffounderror/27107 They should be transitive dependencies of the annotation processor, but they aren't yet. Probably you will have to include some mongo dependencies to annotationProcessor too. Generated sources are located in \build\generated\sources\annotationProcessor\java\main

回答3:

I see you have compile("com.querydsl:querydsl-apt:4.1.4") in your dependencies. According to the docs

Since implementation details matter for annotation processors, they must be declared separately on the annotation processor path. Gradle ignores annotation processors on the compile classpath.

So, put com.querydsl:querydsl-apt:4.1.4 in the annotationProcessor scope.

BTW, consider switching to api / implementation scopes over compile.

回答4:

I could solve the problem by adding the following two dependencies.

annotationProcessor "com.querydsl:querydsl-apt:4.2.1:jpa"
annotationProcessor 'javax.annotation:javax.annotation-api:1.3.1'

The second dependency was a hidden reason why it not worked for me.

来源：https://stackoverflow.com/questions/53913274/querydsl-annotation-processor-issue-after-upgrade-to-gradle-5

标签

java

gradle

querydsl