How to Reference A Jenkins Global Shared Library - jenkins

Question

After reviewing the docs, a number of questions here on SO, and trying a dozen or so different script configurations, I cannot figure out how to reference a shared Groovy library. I've added the library like so:
This appears to be working. I'm referencing the script like so:
You can see the error message therein:
Script1: 1: unable to resolve class Library , unable to find class
for annotation # line 1, column 1. #Library('sonarQubeAPI')_
The script code, not I think it matters, looks like this:
import groovy.json.JsonSlurper
class SonarQubeAPI{
static string getVersion(){
return "1.0";
}
static void getSonarStatus(projectKey){
def sonarQubeUserToken = "USERTOKEN";
def projectStatusUrl = "pathtosonarqube/api/qualitygates/project_status?projectKey=" + projectKey;
println("Retrieving project status for " + projectKey);
def json = getJson(sonarQubeUserToken, projectStatusUrl);
def jsonSlurper = new JsonSlurper();
def object = jsonSlurper.parseText(json);
println(object.projectStatus.status);
}
static string getJson(userToken, url){
def authString = "${userToken}:".getBytes().encodeBase64().toString();
def conn = url.toURL().openConnection();
conn.setRequestProperty( "Authorization", "Basic ${authString}" );
return conn.content.text;
}
}
I'm probably just a magic character off, but I can't seem to lock it down.

Answer 1

Shared libraries are a feature of Jenkins Pipelines, not of Jenkins (core) itself. You can use them only in Pipeline jobs (and child types like Multibranch Pipeline).