During last weeks, some local building contractor was involved in reconstruction of our house and renewing the basement drainage. As a result the new basement drainage has been installed and a new hopper for the sewage pumps has been placed. To be honest, it is a lot of heavy work, performed by the builder including digging, insulating, pounding and other dirty staff – but after all the system works if sewage pump is removing the drainage water. In constrast to the earthworks, where you need much experience and human force, which I don’t have, I took over the plumbing and electrical work on the pumps. In order to have a fail-over system, I installed two pumps, where the second pump is triggered if the first one fails. In order to be able to operate on a short circuit of the first pump, I put the second pump on a separate phase (in Europe, we have three phases power supply, 220V each, shifted by 120° to each other, not like split-phase in US). Having this system installed, you get some periodic work to do: finally you want to make sure by regular testing procedures, that the second pump is operating if the first one has failed. Since I’m lazy and like inventing and constucting stuff more than executing regular test procedures, I decided to implement a monitoring system using some cheap electronic and computer components: Raspberry Pi, Tinkerforge Hardware. continue reading…
Camunda Community Meeting took place at
Holisticon and Jan Galinski and me were talking about
“Test-driven business process modelling with camunda BPM”. Round about 30 participants from consulting, customers and managers were taking part in the session, followed by half an hour of questions and answers. In the end we continued the discussion in even more relaxed athmosphere with beer an chips.
BPM/SOA projects are long running activities denoted by high complexity of requirements, which have to be communicated between the business, organization development and IT departments. The business process models are the core artifact: they serve as a foundation for communication, form a skeleton of the further business and software architecture and are executed by BPM-engines for the process automation. In order to enable the incremental and iterative development of the business process models methods and tools have to be invented, in order to guarantee the fulfillment of process quality and correctness. This talk demonstrates how to develop acceptance test for the BPMN 2.0 models involving the business department. The resulting tests are used for verification of the business process models first, but can be reused during the software development and integration and finally serve as a basis for creation of end-to-end integration test suites used for acceptance and regression. The clou: the tests are written in plain natural language and document the process and its attributes. Therefor they can be easily understood and even specified by the business departments.
What happens in 20 minutes: Starting with a prepared process model and some pre-defined test scenarios we demonstrate the principle of the behavior tests. Then we change the business requirement and simulate a test failure, so the process has to be adjusted, until the failure is gone.
Here are the slides (in German).