如何与gradle一起使用JMH?

问题描述

我想使用 JMH (一种OpenJDK微基准工具)，并带有 gradle 强>.但是，我正在编译时得到NPE.另一方面，从maven使用时，JMH可以工作.

I want to use JMH, an OpenJDK microbenchmark tool, with gradle. However, Im getting the NPE on compilation. On the other hand, JMH works when using from maven.

我没有发布任何 build.gradle ，因为它是基本的-应用Java插件并添加对JHM工具的依赖项( org.openjdk.jmh:jmh-core:0.2 ).

I am not posting any build.gradle as it is basic - apply java plugin and add dependency on JHM tool (org.openjdk.jmh:jmh-core:0.2).

我尝试了此处写的内容，

我还需要做什么?我认为设置代理会有所帮助，但我仍然没有弄清楚.

What else I have to do? I think something with setting the agent, but I still didnt figure it out.

例外:

:compileJava
java.lang.NullPointerException
at org.openjdk.jmh.processor.internal.GenerateMicroBenchmarkProcessor.validMethodSignature(GenerateMicroBenchmarkProcessor.java:502)

推荐答案

刚刚完成了我的"杰作".没有uber-jars，没有插件，代码库与main&测试时，基准测试编译已挂接到主程序，但不会在主流生命周期中自动运行.简单，明确且易于破解的香草gradle.

Just finished my "masterpiece". No uber-jars, no plugins, code base separated from main & test, benchmarks compilation hooked to main, but does not run automatically in the mainstream lifecycle. Simple, explicit, and hackable, vanilla gradle.

我直接从IntelliJ运行它，要在一个盒子上运行，您可能需要uber-jar back:-)

I run it directly from IntelliJ, to run on a box you probably will need the uber-jar back :-)

在进行此操作之前，我花了很多时间来尝试使该插件正常工作，但是按照我的口味，它实在是太笨拙了.

Before doing it I have spent a fair amount of time trying to get that plugin work, but it's way too clunky for my taste.

下面的分步细分.

定义一个名为 jmh 的新 sourceSet ，其类路径与主 sourceSet

Define a new sourceSet called jmh with classpath hooked to that of the main sourceSet

sourceSets {
    jmh {
        java.srcDirs = ['src/jmh/java']
        scala.srcDirs = ['src/jmh/scala']
        resources.srcDirs = ['src/jmh/resources']
        compileClasspath += sourceSets.main.runtimeClasspath
    }
}

为其定义依赖项(至少JMH及其注释处理器).

dependencies {
    ...
    jmhImplementation 'org.openjdk.jmh:jmh-core:1.21'
    jmhImplementation 'org.openjdk.jmh:jmh-generator-annprocess:1.21'
}

定义类型为 JavaExec

Define a task jmh of type JavaExec

task jmh(type: JavaExec, dependsOn: jmhClasses) {
    main = 'org.openjdk.jmh.Main'
    classpath = sourceSets.jmh.compileClasspath + sourceSets.jmh.runtimeClasspath
}

挂钩 jmhClasses 任务在 classes 之后运行，以确保基准与其他代码一起编译

Hook jmhClasses task to run after classes to make sure benchmarks are compiled with the rest of the code

classes.finalizedBy(jmhClasses)

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