I guess the other approach is to have the plugin append to the Jenkins 
system log.  The plugin is using slf4j with jul-to-slf4j with a log4j2.xml 
configuration that goes to SYSTEM_OUT.  Before I start trying to find the 
write logging settings, is this possible?

Thanks

On Tuesday, December 19, 2017 at 10:02:31 AM UTC-6, Shaun Thompson wrote:
>
> The way my plugin is setup is that I have a core API that has zero 
> knowledge of Jenkins.   This allows the code to be used in a standalone cmd 
> line or war type application.  Jenkins plugin just orchestrates the code.  
> I think I'll provide a thin wrapper around the TaskListener.PrintStream 
> object for now in order to send valuable build information to the Pipeline 
> build logs.
>
> Thanks
>
> On Monday, December 18, 2017 at 3:04:16 PM UTC-6, Stephen Connolly wrote:
>>
>> Running build related things in the Jenkins JVM is kind of an 
>> anti-pattern IMHO. Better to fork a JVM that you have complete control over 
>> the classloader, in which case the logging goes to STDOUT and you just pipe 
>> that to the build log
>>
>> On 18 December 2017 at 20:16, Shaun Thompson <[email protected]> wrote:
>>
>>> I'm looking to output external logging, API's that use slf4j, to the 
>>> build logs.  
>>>
>>> On Monday, December 18, 2017 at 8:16:18 AM UTC-6, Jesse Glick wrote:
>>>>
>>>> On Sat, Dec 16, 2017 at 2:18 PM, Shaun Thompson <[email protected]> 
>>>> wrote: 
>>>> > intercept logging in a Pipeline 
>>>> > coming from the TaskListener.PrintStream getLogger() for other API's 
>>>> that 
>>>> > are using slf4j. 
>>>>
>>>> Not sure what you are talking about. Build logs (`TaskListener`) and 
>>>> the system log (`java.util.logging`) are unrelated. 
>>>>
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