7.2.1 Using Log4j in CSSDK

Hi All,

So I'm trying my hat at setting up and using log4j to do some logging in UrlExternalTask using the CSSDK. My task was invoked and worked fine without logging and now I'd like to add some messages to a custom log file.

Having read through a number of threads on this forum on the topic it seems as though what I should do is:
1) Edit /customer_src/etc/conf/customer/log4j.xml uncomment/edit the appender and logger
2) Add the following lines in to my java code:
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import org.apache.log4j.Logger;
...
private static final Logger log = Logger.getLogger(TestUrlExternalTask.class);
...
log.info("Info message within an external task");
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3) run make_toolkit (which had been working before adding the logging functionality in order to compile and deploy my Url External Task)

However now when running make_toolkit it complains that: "package org.apache.log4j does not exist" at line "import org.apache.log4j.Logger;".

It was my understanding that log4j was already present as an available library which should have allowed this to compile without adding log4j-1.2.15.jar to the lib directory (which incidentally I copied from the cssdk jar files, and it specifically says in the UICG NOT to place log4j.jar in the lib directory).

For fun, I added the log4j-1.2.15.jar to my lib directory, and ran make_toolkit again. This time (as expected) the compiler did not complain about the missing package, however, after the make_toolkit completed, I ran the workflow which executes the task, and it seems that my logging statements do not show up in /local/logs/iwui/custom.log as described in the examples/documentation, and further the log messages don't appear to be really anywhere.

I'm wondering two things:
1) Should I have needed to include log4j-1.2.15.jar in my lib directory (seems like I shouldn't have)
2) If by adding that jar file to my lib folder, is it not looking in the correct place for the updated log4j.xml

Any thoughts?

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Comments

jasonmcneil

I tried replacing:
import org.apache.log4j.Logger;
with
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

and
private static final Logger log = Logger.getLogger(TestUrlExternalTask.class);
with:
private static final Log log = LogFactory.getLog(TestUrlExternalTask.class);

and removed log4j-1.2.15.jar from the lib directory.

It complied fine this time during make_toolkit, however still no log entries anywhere. So my next question is, does org.apache.commons.logging use the log4j.xml configuration file? In looking at the customer_samples they seem to work together (just looking at the source code, without actually making the toolkit)

jasonmcneil

I added a System.out.println statement to track down which log that type of output now gets sent to in order to see if my logging messages were ending up there. As it turns out in 7.2.1 what used to be iw_servletd_out.log is now: C:\Interwoven\ApplicationContainer\server\default\log\server.log

Eventually I figured this out, it has to do with the way you specify the logger name. While the example has name="com.corp.custom.*" that doesn't seem to actually pick up anything past com.corp.custom as the wildcard would suggest. Instead, I used name="com.corp.custom" and anything beyond that such as com.corp.custom.task will now pick up the logger.

Adam Stoller

Actually - I believe the best way to do this is to edit the

IWHOME/local/config/lib/content_center/reference/build.xml

file to include other libraries in the classpath during the build.

It's non-intuitive that you need to modify a file in the reference directory - but ...

jasonmcneil

Is that to have the log4j.jar included? I wound up using the apache.commons.logging and didn't actually have to include it in the lib directory in order for it to compile

Silix

My debug messages show up in the servletd_out.log and not in the custom.log

Can you please point out where I'm going wrong ?

My Java code:

 
...
private static final Logger log = Logger.getLogger(ExternalTaskTest.class);
...
log.debug("JobID is "+jobID);

My log4j.xml at \local\config\lib\content_center\customer_src\etc\conf\customer\log4j.xml

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(Topic_36782)OS_BIRT_2.6.2_DynamicallySetDefaultParameterValues.rptdesign

jasonmcneil

Usually when a message shows up in servletd_out.log that means it's just being sent to the console, which in this case probably means that it's missing the logger that you set up and is using the root logger instead, which typically logs to the console, same as using a System.out.println() statement.

Can you check to be sure that the ExternalTaskTest class is in fact in this package "com.trp.workflow"? If that's the case I don't really see anything wrong in your configuration. I'll assume that you ran make_toolkit and that the log4j.xml is the same in your deployed directory (I forget where to check pre 7.2.1)