Hello list,
I've begun integrating WebTest in JMeter. It works. However, there are a
few limitations e.g. static and dynamic properties (see below). But
first I want to introduce you in the procedure getting my WebTest
integrated.
An user can write or capture (WebTestRecorder) several pieces/modules of
a WebTest in XML format (XML entities) without taking care of the
Ant/WebTest overhead (<project>, <target>, <webtest> etc.). Then he or
she can start JMeter, add a WebTestSampler, add/order/enable those
modules and run the test according to JMeter's ThreadGroup parameters.
(WebTest configurations (<config>) can be defined in a property file as
well as in a JMeter WebTestDefaultConfiguration testelement.)
How does it work behind the scenes? First of all, the XML entity inputs
must be assembled (String concatenation) and the Ant/WebTest "overhead"
as mentioned above must be added.
Then we have to initialize an Ant Project object, give it a
ProjectHelper reference and let it parse our XML string. Because Ant
uses SaX parsing we need to overwrite its ElementHandler's
onStartElement() and onEndElement() methods in order to create and link
WebTests objects. For example if onStartElement() gets a <invoke> tag,
we have to create an InvokePage object (via Class.newInstance()) and add
it to the WebtestTask object and so on.
After that the WebtestTask object is passed to the WebTestSampler. But
unfortunately the WebtestTask object isn't thread-safe and cannot be
reused several times (because of destroyed contexts, etc.) from the
WebTestSampler sample() method called by each JMeterThread. To solve
this issue I added a clone() method to WebtestTask which ensures that
each JMeterThread uses a deep copy of WebtestTask to execute(). That's it.
What do you think about this? In my opinion it’s dirty, but I don’t know
how to do it alternatively. Any ideas?
My problem is that many WebTests need static (Ant) or dynamic (WebTest)
properties which are created by <property>, <storeProperty> or something
else. I saw that in the internals of WebTest there is a
WebTestPropertyHelper which extends Ant'S PropertyHelper. Also it seems
like this WebTestPropertyHelper is added to the Project as a reference.
However, the replaceProperties() methods are never called when executing
the execute() method at WebtestTask (which delegates to the execute()
methods of its steps). The result is that no properties get evaluated
and the steps which follow have something like "${}" or "#{}" in their
attribute values.
Do you have any suggestions which can solve this problem? What about
RuntimeConfigurable and maybeConfigure()?
Thank you in advance.
Greets, Stefan.
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