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From Remko Popma <remko.po...@gmail.com>
Subject Re: Log4j2 script to generate hash
Date Wed, 09 Nov 2016 01:18:28 GMT
All filter methods have a Logger object as the first parameter. Can you use that?

Sent from my iPhone

> On 9 Nov 2016, at 9:45, Benjamin Jaton <benjamin.jaton@gmail.com> wrote:
> 
> As far as I know, there is no way for a global filter to know which logger
> we're working it for.
> Which in my case is not the best since I would compute a hash for all the
> messages of all my loggers, instead of just the one I need them for.
> 
> On Tue, Nov 8, 2016 at 4:30 PM, Benjamin Jaton <benjamin.jaton@gmail.com>
> wrote:
> 
>> Ah, I can't use 'logEvent' but I can use 'message', perfect, thank you!
>> 
>>> On Tue, Nov 8, 2016 at 4:21 PM, Remko Popma <remko.popma@gmail.com> wrote:
>>> 
>>> Yes Filters can be applied at different stages of the logging pipeline.
>>> The Filter interface has separate methods for these stages. Different
>>> parameters are passed to these methods.
>>> 
>>> Sent from my iPhone
>>> 
>>>> On 9 Nov 2016, at 8:57, Benjamin Jaton <benjamin.jaton@gmail.com>
>>> wrote:
>>>> 
>>>> Ah, interesting. I seem to be able to make modification using this
>>> global
>>>> filter.
>>>> 
>>>> However I don't seem to have access to the log event that way?
>>>> 
>>>> Caused by: groovy.lang.MissingPropertyException: No such property:
>>> logEvent
>>>> for class: Script2
>>>>   at
>>>> org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(Scr
>>> iptBytecodeAdapter.java:53)
>>>>   at
>>>> org.codehaus.groovy.runtime.callsite.PogoGetPropertySite.get
>>> Property(PogoGetPropertySite.java:52)
>>>>   at
>>>> org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGr
>>> oovyObjectGetProperty(AbstractCallSite.java:307)
>>>>   at Script2.run(Script2.groovy:8)
>>>>   at
>>>> org.codehaus.groovy.jsr223.GroovyScriptEngineImpl.eval(Groov
>>> yScriptEngineImpl.java:343)
>>>>   ... 12 more
>>>> 
>>>>> On Tue, Nov 8, 2016 at 3:47 PM, Remko Popma <remko.popma@gmail.com>
>>> wrote:
>>>>> 
>>>>> If you make it a global filter it will get applied before the LogEvent
>>> is
>>>>> constructed. Please try that.
>>>>> 
>>>>> Remko
>>>>> 
>>>>> Sent from my iPhone
>>>>> 
>>>>>> On 9 Nov 2016, at 7:02, Benjamin Jaton <benjamin.jaton@gmail.com>
>>> wrote:
>>>>>> 
>>>>>> I am applying it on the root logger.
>>>>>> 
>>>>>>> On Tue, Nov 8, 2016 at 12:47 PM, Matt Sicker <boards@gmail.com>
>>> wrote:
>>>>>>> 
>>>>>>> Where are you applying the filter? On the appender or somewhere
else?
>>>>>>> 
>>>>>>> On 8 November 2016 at 13:13, Benjamin Jaton <
>>> benjamin.jaton@gmail.com>
>>>>>>> wrote:
>>>>>>> 
>>>>>>>> hello,
>>>>>>>> 
>>>>>>>> I was playing with log4j2 filters to generate a hash in groovy
that
>>> I
>>>>>>> would
>>>>>>>> put in the threadcontext map, and then use in my log pattern:
>>>>>>>> 
>>>>>>>> %d{yyyy-MM-dd HH:mm:ss} %-5p %c{1.}:%L - %m [%X{myhash}]
>>>>>>>> 
>>>>>>>> But the hash is printed on the NEXT log message.
>>>>>>>> My understanding is that at this point the log message is
already
>>>>>>> formatted
>>>>>>>> and final.
>>>>>>>> 
>>>>>>>> Is there another way I can use a custom script where the
log event
>>> can
>>>>>>>> actually be modified?
>>>>>>>> 
>>>>>>>> Thanks,
>>>>>>>> Ben
>>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> --
>>>>>>> Matt Sicker <boards@gmail.com>
>>>>>>> 
>>>>> 
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>>>>> 
>>>>> 
>>> 
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>>> 
>> 

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