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From Niranjan Rao <nhr...@gmail.com>
Subject Re: Separate appender for each application in same Tomcat
Date Fri, 15 Apr 2016 17:12:04 GMT
You know your environment better and know all the problems, but I think 
I am getting confused. Is it same application deployed with two 
different WAR files? I mean say app.war copied as prod.war and qa.war? 
How do applications know where to find other settings? Is it read from 
the resources or come via same external configuration.

I mean when you create the WAR file, something is telling application 
what to look at. Can same mechanism be used to modify the entry web.xml?

For local development, it's actually very easy - you just set -D flag in 
eclipse launch configuration. Other IDEs should be supporting something 

Good luck.



On 04/15/2016 01:52 AM, Steven Yang wrote:
> First of all thanks to all suggestions.
> I dont think setting system property solves my issue because they are both
> in the same tomcat which means they share the same system property.
> setting the log4jConfiguration in web.xml means I will always have to set
> it even if I am in local development right? unless I use different web.xml
> for different environments?
> I think I will go into the direction of Ralph's suggestion, however I am
> probably going to use ${web:contextPath}.
> Thanks all
> On Fri, Apr 15, 2016 at 5:02 AM, Matt Sicker <boards@gmail.com> wrote:
>> That functionality is from log4j-web.
>> On 14 April 2016 at 15:50, Niranjan Rao <nhrdls@gmail.com> wrote:
>>> If you are using spring by any chance, I think this can be resolved using
>>> following in web.xml
>>> <context-param>
>>>          <param-name>log4jConfiguration</param-name>
>>>          <param-value>${sys:LOG4J_PATH}</param-value>
>>>      </context-param>
>>> and LOG4J_PATH is defined using -DLOG4J_PATH=file:///<your path> in
>> setenv
>>> file.
>>> I am not sure if this is spring functionality, or log4j functionality,
>> but
>>> it does work for us. We have multiple application on same tomcat instance
>>> and each log goes to it's own file. We don't like to embed the log4j
>>> settings in the JAR or WAR files as it means another deployment if you
>> want
>>> to change log settings to triage a problem.
>>> Regards,
>>> Niranjan
>>> On 04/13/2016 09:54 PM, Ralph Goers wrote:
>>>> Is the log4j configuration similar in the same environments?  If so you
>>>> could have your log4j.xml file be a “template” where all the items that
>> are
>>>> variable are variables resolved by a lookup.  You could either use the
>>>> system properties lookup and make sure all the system properties are
>>>> defined, or you could create a custom lookup that reads a property file
>>>> named for the environment as you have described. You would then use that
>>>> lookup to resolve all the configurable items in log4j2.xml.
>>>> Ralph
>>>> On Apr 13, 2016, at 5:22 PM, Steven Yang <kenshin520@gmail.com> wrote:
>>>>> Hi
>>>>> currently the convention we adopt on property files are having separate
>>>>> file for each environment.
>>>>> for example, if there is a property file call "database" then there
>> will
>>>>> be
>>>>> a database.dev.properties for local develop, database.uat.properties
>> for
>>>>> UAT and a database.prod.properties for production.
>>>>> However log4j only supports a normal one and a test.
>>>>> Of course we can rename the file before deploying the application (no
>>>>> hassle, since we are using Gradle).
>>>>> However, we dont feel like its the best solution thats why we used the
>>>>> jvm
>>>>> argument when we were using separate tomcats.
>>>>> So just want to make sure there is no other better solution for this
>> case
>>>>> before I go into using the xml file directly in the war file.
>>>>> Thanks
>>>>> On Wed, Apr 13, 2016 at 3:17 AM, Kamal Mettananda <lkamal@gmail.com>
>>>>> wrote:
>>>>> Hi Steven
>>>>>> Have you looked at using separate and different log4j2.xml files
>> inside
>>>>>> each app (.war files) rather than using command line configurations?
>>>>>> Thanks
>>>>>> Kamal
>>>>>> -----------------------
>>>>>> www.digizol.com
>>>>>> On Tue, Apr 12, 2016 at 4:10 PM Steven Yang <kenshin520@gmail.com>
>>>>>> wrote:
>>>>>> Hi
>>>>>>> I am trying to deploy 2 applications in to one tomcat (originally
>> 2
>>>>>>> separate tomcat).
>>>>>>> And I use -Dlog4j.configurationFile to specify my log4j
>> configuration.
>>>>>>> However, if I do that both applications will write to the same
>>>>>>> I want each application to write to there own files.
>>>>>>> Both applications have very similar packages and share many common
>>>>>>> libraries developed in-house, so using package name to separate
>>>>>>> will
>>>>>>> not be what we want.
>>>>>>> What is the best solution/practice to this kind of problem?
>>>>>>> (using log4j 2.5)
>>>>>>> Thanks
>>>> ---------------------------------------------------------------------
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>> --
>> Matt Sicker <boards@gmail.com>

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