Using Oozie Worfklow Expression Language Functions in Hue

[#1]

I have a shell action node that is able to send notifications to a chat application and can be used as a transition route if another action node in the workflow fails. What I'd like to be able to do, is use wf:user() and wf:lastErrorNode() in that notification.

My idea was to pass these values to my shell script as arguments, but when I place 'wf:X()' as the argument to my shell action node, it doesn't resolve to anything and just gives me the raw string as the argument.

Is there a way to use these in a shell action node? 

[#2]

Hi James,

Could you share your XML action script for that SSH action?

In general, the following example shows how to pass arguments to your shell (from Oozie docs😞

<workflow-app name="sample-wf" xmlns="uri:oozie:workflow:0.1">
    ...
    <action name="myssjob">
        <ssh>
            <host>foo@bar.com<host>
            <command>YOURCOMMAND</command>
            <args>${wf:user()}</args>
            <args>${wf:lastErrorNode()}</args>
        </ssh>
        <ok to="myotherjob"/>
        <error to="errorcleanup"/>
    </action>
    ...
</workflow-app>

 Note the ${} syntax of the parameter.  If this helps, please accept this as a solution.

Regards,

Alex

[#3]

If you are doing this through Hue, please post the generated XML once you submit the job.

[#4 · Accepted solution]

Hi Alex,

I've resolved the issue. I had been using the wf:X() in the wrong place. Initially I had added an argument for the shell action like ${user} and then set $wf:user() as the value of that argument when submitting the workflow.

I replaced ${user} with the Expression Language Function and the value was resolved automatically and when submitting the workflow I wasn't asked to provide a value for the argument 🙂