How to write on Jenkins console output? - jenkins

Question

I'm coding a library for my Jenkins pipelines. I would like to print different formats for my messages, like [INFO], [WARNING] and so on.
So far I have this:
import org.foo.Output
def call(body) {
def config = [:]
body.resolveStrategy = Closure.DELEGATE_FIRST
body.delegate = config
body()
def out = new Output()
node("${config.slaveNodeName}") {
try {
stage ('CLONE') {
out.info("SOME VERY USEFUL INFORMATION")
...
And at my org.foo.Output class:
package org.foo
import java.util.logging.Logger
class Output {
private static final Logger LOGGER = Logger.getLogger(Output.class.getName());
def info(msg){
LOGGER.info("${msg}")
echo "[INFO] ${msg}" <-- gives me an exception described below
}
}
I can see the [INFO] SOME VERY USEFUL INFORMATION on my Jenkins log, however, I would like to redirect this message to Jenkins output console.
How can I do that?
Exception:
hudson.remoting.ProxyException: groovy.lang.MissingMethodException: No signature of method: org.foog.Output.echo() is applicable for argument types: (org.codehaus.groovy.runtime.GStringImpl) values: [[INFO] SOME VERY USEFUL INFORMATION]
Possible solutions: each(groovy.lang.Closure), info(java.lang.Object), wait(), grep(), any(), find()
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:58)
at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.call(PogoMetaClassSite.java:54)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
at com.cloudbees.groovy.cps.sandbox.DefaultInvoker.methodCall(DefaultInvoker.java:19)

Answer 1

Valter, try this one. It's working in my scripts, I think it would also work in your scripts.
In groovy script, add this:
node("${config.slaveNodeName}") {
try {
stage ('CLONE') {
out.info(this,"SOME VERY USEFUL INFORMATION")
and change the class groovy script like this:
def info(script,msg){
LOGGER.info("${msg}")
script.echo "[INFO] ${msg}"
}