| In the Jenkins documentation, it mentions that all var definitions are on-demand singletons, but does not explain what that means. Documentation reference: https://jenkins.io/doc/book/pipeline/shared-libraries/#defining-global-variables Does this mean that the singleton is determined at the moment the job is called, so its a unique instance for that particular job? And how does this compare to an explicit @Singleton call when placed on a class? I tried setting up my shared pipeline so I could review both sides of it. When I run the code below, I can see in the output that both classes print out the information I expect. They both start as empty strings and then are set equal to the env.BUILD_TAG. My concern is that if I have multiple jobs running concurrently, do they share the same Singleton or is it unique to each build? So far I have not been able to prove this, so I was hoping someone has an answer to this. Structure
src
- org
- utilities
- GlobalStateClass.groovy
vars
- globalStateVar.groovy
- main.groovy
GlobalStateClass.groovy
#!groovy
package org.utilities
@Singleton
class GlobalStateClass implements Serialization{
public String version = ""
}
globalStateVar.groovy
#!groovy
class globalStateVar implements Serialization{
public String version = ""
}
main.groovy
#!groovy
import org.utilities.GlobalStateClass
def call () {
println "Old Values: ${ GlobalStateClass.instance.version } ${ state.version }"
String v = env.BUILD_TAG
GlobalState.instance.version = v
state.version = v
println "New Values: ${ GlobalStateClass.instance.version } ${ state.version }"
}
Jenkinsfile
pipeline {
agent any
stages {
stage('test 0'){
main()
}
stage('test 1'){
main()
}
stage('test 2'){
main()
}
stage('test 3'){
main()
}
}
}
|
