Plugin not compatible with upcoming Spring Boot 3

[stuaeb]

It seems that in Spring Boot, the bootRunMainClassName task has been removed or renamed:

Caused by: org.gradle.api.UnknownTaskException: Task with name 'bootRunMainClassName' not found in root project 'xxx'.
at org.gradle.api.internal.tasks.DefaultTaskCollection.createNotFoundException(DefaultTaskCollection.java:102)
at org.gradle.api.internal.tasks.DefaultTaskCollection.createNotFoundException(DefaultTaskCollection.java:46)
at org.gradle.api.internal.DefaultNamedDomainObjectCollection.named(DefaultNamedDomainObjectCollection.java:360)
at org.gradle.api.internal.tasks.DefaultTaskCollection.named(DefaultTaskCollection.java:112)

[faha1Ex]

I face the same problem and had to remove the plugin completely in order to prepare for the upcoming Spring Boot 3.0 release.

[faha1Ex]

Seems like the task was renamed to 'resolveMainClassName' in Spring Boot 3.0.
I am currently investigating locally and try to get it working again while upgrading an application to Spring Boot 3.0.

It is also connected to this issue, why was this not followed up? The mentioned workaround also does not work for me #79

Are there any plans to support this change officially? Like with a new version dedicated only for Spring Boot 3.0?
Or by conditionally choosing based on the Spring Boot Gradle plugin version? (Honestly, I have not clue if this is easily possible)
We really love the plugin and would also like to continue using it in the future :)

[cpoyatos1]

+1

[vsvyatski]

I'm experiencing the same issue here.

[schleichardt]

I added as workaround in build.gradle:

task bootRunMainClassName { // workaround for https://github.com/springdoc/springdoc-openapi-gradle-plugin/issues/94
    doLast {
        springBoot.mainClassName
    }
}

[armogur]

I added as workaround in build.gradle:

task bootRunMainClassName { // workaround for https://github.com/springdoc/springdoc-openapi-gradle-plugin/issues/94
    doLast {
        springBoot.mainClassName
    }
}

This partly solved my problem, that means I could build the project, which is good, but when I want to generate API with this command:
./gradlew clean generateOpenApiDocs

I got another issue:

Querying the mapped value of task ':resolveMainClassName' property 'outputFile' before task ':resolveMainClassName' has completed is not supported

Anyone can suggest on how to fix this?

[schleichardt]

I tried

bootRun {
    mainClass = "package.to.Main"
}

to get rid of the 'outputFile' error, but then I got a java.lang.ClassNotFoundException for my Main class even though ./gradlew bootRun works.

[vsvyatski]

Well, this issue helped me to realize that I don't really use this plug-in, I simply added it to my project for I had springdoc-openapi-ui artifact leveraged. At the moment I believed that was sort of necessary, it appeared it isn't. So I just removed the plug-in and everything worked.

[steklopod]

I created PR for supporting Spring Boot 3.0.0: #95

[lubumbax]

Any chance to make it work for Kotlin/build.gradle.kts?

[steklopod]

Any chance to make it work for Kotlin/build.gradle.kts?

It already works for kotlin. But not for spring 6

[lubumbax]

Any chance to make it work for Kotlin/build.gradle.kts?

It already works for kotlin. But not for spring 6

As the title goes "Plugin not compatible with upcoming Spring Boot 3" (which requires Spring 6), any chance to make the fix work for both Java and Kotlin?

And regarding the workaround above for gradle.build, any chance to make that work for Kotlin's gradle.build.kts?:

task bootRunMainClassName { // workaround for https://github.com/springdoc/springdoc-openapi-gradle-plugin/issues/94
    doLast {
        springBoot.mainClassName
    }
}

[jord1e]

Any chance to make it work for Kotlin/build.gradle.kts?

It already works for kotlin. But not for spring 6

As the title goes "Plugin not compatible with upcoming Spring Boot 3" (which requires Spring 6), any chance to make the fix work for both Java and Kotlin?

And regarding the workaround above for gradle.build, any chance to make that work for Kotlin's gradle.build.kts?:

task bootRunMainClassName { // workaround for https://github.com/springdoc/springdoc-openapi-gradle-plugin/issues/94
    doLast {
        springBoot.mainClassName
    }
}

Just needed this...:

tasks.create("bootRunMainClassName") { // workaround for https://github.com/springdoc/springdoc-openapi-gradle-plugin/issues/94
    doLast {
        springBoot.mainClass.get()
    }
}

[pplmx]

FYI. I tried this, works fine now.

tasks.register('bootRunMainClassName')