Thanks Deepak, you always have very thoughtful replies.
I'm trying to make sure that a particular functional path through JMeter
results in particular lines in the tomcat log file. I also want to make
sure a particular functional path results in no ERRORS being logged in the
tomcat log file. Your idea about writing a service that just returns the
log lines I want is pretty much what I was thinking of doing, only I was
thinking of writing a custom sampler to wrap up the service. It's a lot
less work to do just what you're suggesting though.
If anyone else would find this web service useful for your JMeter test, let
me know and I'll post the source somewhere.
David
--------------------------------------------------
From: "Deepak Shetty" <[email protected]>
Sent: Sunday, November 01, 2009 5:16 PM
To: "JMeter Users List" <[email protected]>
Subject: Re: Is there a sampler that can read a tomcat log file?
Hi
what are you trying to assert in the logs? Ideally your response and
response code should tell you everything you need to know.
You need not necessarily have to extend Jmeter (you could just have a JSP
page / code on tomcat ) which returns whatever you want (that is you don't
need any Special Log Sampler , any HTTP/Web Service sampler should work
just
as well).
regards
deepak
On Sun, Nov 1, 2009 at 5:06 PM, David Levine <[email protected]>
wrote:
Hi,
As part of my functional test, I'd like to assert that a particular line
is
present (or not present) in the tomcat log file for my application.
After
looking around at the available samplers and other JMeter tricks, it
doesn't
look like there's a way to do this without writing code and extending
JMeter. Am I correct or is there a way to do this?
OK, there's one kind of hacky way I thought of doing this, which is to
write a web service that returns the tomcat log as an XML document, and
then
use an HTTP Request along with an XPath Extractor post processor, and
look
for the log line I'm looking for. But that means I'd have to send back
the
whole log file every time, which could be huge - so I don't like that.
So I was thinking of writing a new sampler, called maybe the Tomcat Log
Sampler, that let's you specify a regex query for log lines that you're
looking for, and then returns those as XML, so that you can use the XPath
Extractor to pull the log lines you're looking for into a variable which
you
can then subsequently use. The Tomcat Log Sampler would really just be a
proxy for a new web service I'd write, that would need to be running on
the
tomcat web server. The Tomcat Log Web Service would perform the actual
query and return the results. That way it could scale.
OK, does this make any sense or am I way off somewhere?
David
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