Jenkins2 Groovy Getting Started

Article from: http://www.ciandcd.com the code from can be downloaded from github: HTTPS://GITHUB.COM/CIANDCD installation:

wget Https://dl.bintray.com/groovy/maven/apache-groovy-binary-2.4.7.zip
Unzip Apache-groovy-binary-2.4.7.zip
sudo ln-s/home/osboxes/downloads/groovy-2.4.7/bin/groovy/usr/bin/groovy
Groovy-v
Groovy version:2.4.7 jvm:1.8.0_91 vendor:oracle Corporation os:linux

Reference:

https://learnxinyminutes.com/docs/groovy/
Http://www.groovy-lang.org/index.html
Https://github.com/ciandcd/jenkins-awesome/blob/master/utils/groovy_basic.gy

Groovy basic syntax for easy access.

#!/usr/bin/env groovy//Hello worldprintln "Hello world!" Variables:you can assign values to Variables for later usedef x = 1println xx = new java.util.Date () println xx =-3.14 99392println xx = falseprintln xx = "groovy!" println x//creating an empty listdef technologies = []/*** Adding A elements to the list ***///as with JAVATECHNOLOGIES.A DD ("Grails")//left shift adds, and returns the Listtechnologies << "Groovy"//ADD multiple Elementstechnologies.add All (["Gradle", "Griffon"])/*** removing elements from the list ***///as with Javatechnologies.remove ("Griffon")// Subtraction Works alsotechnologies = technologies-' Grails '/*** iterating Lists ***///iterate over elements of a Listtec Hnologies.each {println "technology: $it"}technologies.eachwithindex {it, I-println "$i: $it"}/*** Checking List C Ontents ***///evaluate If a list contains element (s) (Boolean) contained = Technologies.contains (' Groovy ')//orcontained = ' Groovy ' in technologies//Check for multiple contEntstechnologies.containsall ([' Groovy ', ' Grails '])/*** sorting Lists ***///Sort a list (mutates original list) Technologies.sort ()//To sort without mutating original, you can do:sortedtechnologies = Technologies.sort (false)/*** Ma Nipulating Lists ***///replace All elements in the Listcollections.replaceall (technologies, ' Gradle ', ' Gradle ')// Shuffle a listcollections.shuffle (technologies, New Random ())//clear a listtechnologies.clear ()//creating an empty Mapdef DevMap = [:]//add valuesdevmap = [' name ': ' Roberto ', ' framework ': ' Grails ', ' language ': ' Groovy ']devmap.put ('  LastName ', ' Perez ')//iterate over elements of a Mapdevmap.each {println "$it. Key: $it. Value"}devmap.eachwithindex {it, I  -println "$i: $it"}//evaluate If a map contains a keyassert devmap.containskey (' name ')//evaluate if a map contains a  Valueassert devmap.containsvalue (' Roberto ')//get the keys of a mapprintln devmap.keyset ()//get the values of a mapprintln Devmap.values ()//groovy supports the usual if-else SyntaxdEF x1 = 3if (x1==1) {println "one"} else if (x1==2) {println "one"} else {println "X greater than"}//groovy also supports the ternary operator:def y = 10def x2 = (y > 1)? "Worked": "Failed" assert x2 = = "worked"//instead of using the ternary operator://displayname = User.Name? User.Name: ' Anonymous '//we can write It://displayname = user.name?: ' Anonymous '//for loop//iterate over a rangedef x3 = 0for (i in 0.) {x3 + = I}//iterate over a listx4 = 0for (i-in [5,3,2,1]) {x4 + = I}//iterate over an Arrayarra y = (0..20). ToArray () x5 = 0for (i in array) {x5 + = I}//iterate over a mapdef map = [' name ': ' Roberto ', ' framework ': ' Gra Ils ', ' language ': ' Groovy ']x6 = 0for (e in map) {x6 + = e.value}/* Closures A Groovy Closure is like A "code block" Or a method pointer.  It is a piece of code, defined and then executed at a later point. More info At:http://www.groovy-lang.org/closures.html*///example:def clos = {println "Hello world!"} println "Executing the Closure: "Clos ()//passing parameters to a closuredef sum = {A, B--println a+b}sum (2,4)//closures may refer t o variables not listed in their parameter list.def X7 = 5def multiplyby = {num--num * x7}println multiplyby (Ten)//I f you had a Closure that takes a single argument and you may omit the//parameter definition of the closuredef clos2 = {pri Ntln it}clos2 ("HI")/* Groovy can memoize closure results [1][2][3]*/def cl = {A, B, sleep (+)//simulate so    Me time consuming processing a + B}mem = Cl.memoize () def callclosure (A, b) {def start = System.currenttimemillis () Println Mem (A, B) println "Inputs (a = $a, B = $b)-Took ${system.currenttimemillis ()-Start} msecs."} Callclosure (1, 2) callclosure (1, 2) callclosure (2, 3) callclosure (2, 3) callclosure (3, 4) callclosure (3, 4) callclosure (1, 2) Callclosure (2, 3) callclosure (3, 4)

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Jenkins2 Groovy Getting Started