I have investigated both soapUI/loadUI and JMeter but I have settled on using my own custom-written Web Service client to perform both functional and performance testing. I have integrated Groovy so that test cases can be written without the need to recompile anything, and as my client uses generated proxy classes I am able to manipulate POJOs rather than XML to create requests and validate responses.
I'm already able to generate requests sequentially and in parallel (using a fixed number of threads) but I would like to generate load in a similar method to the loadUI generators which work using Transactions Per Second (TPS).
I am unsure how to maintain a fixed (or ramping) TPS load, so can anyone suggest a technique to use or some code to look at that I might find instructive?
I have solved this problem using a combination of
ExecutorService(cached thread pool) andCompletionServiceand simply managing the time between the creation of 'tasks'.