On 17 December 2010 00:25, Alia McCutcheon <[email protected]> wrote: > The problem: > Trying to load test an application that uses AMF3. Our service > replies with session data (and other variables) that must be included > in responses to the server. > > This means that we cannot pre-compute all of the .binary files and > just play them back as they will not have updated session information. > I have seen a few responses to this question around the net and > wanted to confirm before either giving up or really getting stuck into > it. > > So far we can: > Record a session to disk within the JMeter proxy. (.binary files) > Replay the session within JMeter and load the files as attachments. > View the contents of the AMF replies in human readable format. > > We have http://code.google.com/p/jmeter-amf-visualizer/ to help > decoding the responses – so I’m pretty sure we can extract variables > from it. And we have https://github.com/llun/amf or BlazeDS > to help encoding to send to the server. > > So it seems that we have some (if not all of) the pieces, what I am > missing is the knowledge of the JMeter architecture. My question is – > is it possible to add (preferably in a clean way but I’m not opposed > to hacking it in) something between the loading of the binary file > from disk to do the variable substitution?
Any file loading is done by the sampler. If the files are small, you might get away with writing a function that filters the file and returns the data to the sampler. However, for larger files you would need to hack the sampler to add the filtering whilst the file is being read. > And if not is there a good > place to add the decode before we write to disk? (Something like what > NeoLoad does) Any pointers as to where would be a good place to start > would be helpful. Response data is handled by the sampler initially and stored in the SampleResponse. This is passed on to PostProcessors, Assertions and Listeners. It is the Listeners that write data to disk if required. The normal way of extracting information from a response is to use a PostProcessor such as Regex Extractor or XPath Extractor. In this case, the data is in binary, so they won't work. You could write a PostProcessor that converted the responseData to text, and then use the existing PostProcessors. This would change what was written to disk, which seems to be what you want. Or you could write your own PostProcessor extractor that understands the binary format. > Thanks! > > Alia > > References: > http://mail-archives.apache.org/mod_mbox/jakarta-jmeter-user/200807.mbox/%[email protected]%3e > http://mail-archives.apache.org/mod_mbox/jakarta-jmeter-user/200811.mbox/%[email protected]%3e > http://mail-archives.apache.org/mod_mbox/jakarta-jmeter-user/200904.mbox/%3c2ab2b3c160bfc14cb0d94d437513c3ba01950...@revmail02.revenuedomain.ie%3e > http://mail-archives.apache.org/mod_mbox/jakarta-jmeter-user/201010.mbox/%[email protected]%3e > http://note19.com/2008/05/06/how-to-use-jmeter-to-load-test-flex-applications/ > http://blog.jteam.nl/2009/07/14/performance-testing-a-flex-blazeds-application/ > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
