Jenkins中的数组简单并行执行 [英] Simple parallel execution in Jenkins for an array

问题描述

我在使用Groovy运行 Jenkins 作业时遇到麻烦，而且看起来超级简单，但我是1)Java/Groovy的菜鸟，以及2)我能找到的所有示例都不是这正是我需要做的.

I'm having trouble running a Jenkins job using Groovy, and it seems super simple but I'm 1) a noob at Java/Groovy and 2) all the examples I can find are not quite what I need to do.

我发现了以下类似问题: Jenkins Groovy并行变量不起作用，但完全 >代码会导致错误:

I found the following similar question: Jenkins Groovy Parallel Variable not working, but that exact code results in an error:

java.lang.UnsupportedOperationException:调用public static java.util.List org.codehaus.groovy.runtime.DefaultGroovyMethods.collect(java.lang.Object，groovy.lang.Closure) CPS转换后的闭包上尚不支持(JENKINS-26481)； 封装在@NonCPS方法中，或使用Java样式的循环

java.lang.UnsupportedOperationException: Calling public static java.util.List org.codehaus.groovy.runtime.DefaultGroovyMethods.collect(java.lang.Object,groovy.lang.Closure) on a CPS-transformed closure is not yet supported (JENKINS-26481); encapsulate in a @NonCPS method, or use Java-style loops

这是我要执行的操作的伪代码:

Here's my pseudo-code of what I want to do:

String[] arr = [ "one","two","three",'four','five' ]
echo "Running commands: ${arr}"
int top = arr.size()
echo "top is ${top}"
parallel arr.each {
    echo "${it}"
}

我尝试了闭包，但是它们引发了错误，说实话，我几乎不知道如何使用它们. 以下代码

I've tried closures, but they throw an error and honestly I barely know how to use them. The following code

String[] arr = [ "one","two","three",'four','five' ]
echo "Running commands: ${arr}"

parallel arr.collect { item ->
    { -> 
        echo "${item}"
    }
}

抛出与上述相关问题相同的"java.lang.UnsupportedOperationException".

throws the same "java.lang.UnsupportedOperationException" as the related question above.

我正在尝试学习如何与Jenkins一起正确地使用Groovy，但这很困难.只是在此时寻求任何帮助.

I'm trying to learn how to properly utilize Groovy with Jenkins, but it's been rough. Just looking for any help I can get at this point.

谢谢.

推荐答案

这是一个很烦人的限制，但是当前您不能在管道脚本中使用.each(如此处记录:

It's a pretty annoying limitation, but currently you can't use .each in a pipeline script (as documented here: https://issues.jenkins-ci.org/browse/JENKINS-26481)

您需要执行一个实际的循环，例如

You need to do an actual loop, like

String[] arr = [ "one","two","three",'four','five' ]
echo "Running commands: ${arr}"
int top = arr.size()
echo "top is ${top}"
for (it in arr) {
    echo "${it}"
}

如果实际上需要并行执行，则代码将更像:

If actually need parallel execution the code will look more like:

String[] arr = [ "one","two","three",'four','five' ]
echo "Running commands: ${arr}"
int top = arr.size()
echo "top is ${top}"
def stepsForParallel = [:]

for (int i = 0; i < arr.size(); i++) {
    def it = arr[i]
    def stepName = "running ${it}"
    stepsForParallel[stepName] = { ->           
        echo "${it}"
    }
}

parallel stepsForParallel

您链接到的另一个stackoverflow使用Build Flow插件，它是您正在使用的Pipeline插件的前身.这就是为什么相同的代码不起作用的原因.

The other stackoverflow you linked to uses the Build Flow plugin, which is the predecessor to the Pipeline plugin that you're using. That's why the same code doesn't work.

编辑:在现代的詹金斯(在2.150.1中进行测试)中，上面列出的原始错误已修复，并且.each起作用.您可以为并行执行执行以下操作:

In modern Jenkins (tested in 2.150.1) the original bug listed above is fixed, and .each works. You can do the following for parallel execution:

String[] arr = [ "one","two","three",'four','five' ]

def stepsForParallel = [:]
arr.each {
    def stepName = "running ${it}"
    stepsForParallel[stepName] = { ->           
        echo "${it}"
    }
}
parallel stepsForParallel

这篇关于Jenkins中的数组简单并行执行的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！