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... | |
subprojects { | |
... | |
apply plugin: 'java' | |
apply plugin: 'scala' | |
sourceCompatibility = 1.8 | |
targetCompatibility = 1.8 | |
sourceSets.main { | |
java.srcDirs = ['src/main/java'] | |
scala.srcDirs = ['src/main/scala'] | |
scala.include '**/*.*' | |
} | |
sourceSets.test { | |
java.srcDirs = ['src/test/java'] | |
scala.srcDirs = ['src/test/scala'] | |
scala.include '**/*.*' | |
} | |
// https://docs.gradle.org/current/userguide/building_java_projects.html#sec:java_source_sets | |
sourceSets { | |
jmh { | |
java.srcDirs = ['src/jmh/java'] | |
scala.srcDirs = ['src/jmh/scala'] | |
resources.srcDirs = ['src/jmh/resources'] | |
compileClasspath += sourceSets.main.runtimeClasspath | |
} | |
} | |
dependencies { | |
... | |
jmhImplementation 'org.openjdk.jmh:jmh-core:1.27' | |
jmhAnnotationProcessor 'org.openjdk.jmh:jmh-generator-annprocess:1.27' | |
} | |
// https://docs.gradle.org/current/dsl/org.gradle.api.tasks.JavaExec.html | |
task jmh(type: JavaExec, dependsOn: jmhClasses) { | |
main = 'org.openjdk.jmh.Main' | |
classpath = sourceSets.jmh.compileClasspath + sourceSets.jmh.runtimeClasspath | |
// To enable the built-in stacktrace sampling profiler | |
// args = ['-prof', 'stack'] | |
} | |
// to make sure benchmarks always get compiled | |
classes.finalizedBy(jmhClasses) | |
} | |
... |
I came across the fact that if you want to write benchmarks in Kotlin (not the code being checked, but the code of the benchmarks themselves), then annotationProcessor
will not be enough. The code will be generated only by annotations in the Java code. Kotlin will be ignored. But you can use kapt
instead, the code will be generated immediately and Java and Kotlin.
Here you can see an example where benchmarks are written immediately in both Kotlin and Java.
Actually an annotation processor is not required in case of JMH. JMH has a special org.openjdk.jmh.generators.bytecode.JmhBytecodeGenerator
. Here you can see how to make a task in gradle that will generate code without using annotationProcessor
and kapt
. Not as the best solution, I want to share for those who may be useful.
Thanks, @CSchoel! I have had checked your post before and I was not able to make it work as I am not very used to the the Gradle scripting, converting it from Kotlin DSL was also not straightforward for me. However, giving a second try it worked! I have then completely dropped the JMH gradle plugin! Here is the commit. Really appreciated!