My first real contribution was to implement loop compaction, i.e., use UML combined fragments to express loops. A Chrome browser extension displays the output as soon as the text file is updated. PlantUML syntax is human readable and editable plain text.
Planttext sequence diagram code#
His code saves a sequence diagram in the format of the free PlantUML tool that requires Java on your machine. I now believe his breakthrough design decision was to delegate the graphical representation to an external tool. I have been using Chris Paine’s code and I liked it very much. Some hard coded limitations in the ATRA_UML_DECIDER function module and the CL_ATRA_FACTORY class must be overridden to enhance sequence diagrams by subclassing CL_ATRA_UML (implementation of the IF_ATRA_UML_TOOL interface). SAP has provided an easy enhancement path for the UML class diagram output (subclass class CL_UML_CLASS_DECORATOR). The appealing visualization revealing actual communication patterns makes it easier to discuss separation of concern, stable interfaces and simpler protocols for objects exposing too much of their inner structure. Object oriented ABAP code defines classes while the application behavior is better explained by messages exchanged between run-time objects. When the creation cost is low, the feedback loop is short, and we can routinely use sequence diagrams to appreciate the impact of code changes on the overall system design. Our aim is to automate the sequence diagrams generation from run-time measurements. Motivation Sequence Diagrams from Run-time Data The designer must ultimately decide if the increased complexity (new classes) is justified. It is tempting to create layers of abstractions everywhere to increase flexibility, I made a more complex proposal in the use case above. method START( ), there is no ripple effect of change through the system. As long as they abide by the contract, e.g. With a stable interface, caller and called actors can change independently. The design pattern here is to evaluate which parts of the system are likely to change and to isolate those parts in new actors with carefully crafted interfaces.
Sandi Metz says that each message requires that the sender know things about the receiver.
compared with this SCN thread OO Analysis) before the system is built. Design-Time Sequence DiagramsĪt design time, sequence diagrams are usually created manually before the code is implemented to visualize collaboration aspects of the desired system actors. Design time sequence diagrams accelerate the discussion on stable interfaces (e.g. This feature was never fully delivered according to SAP OSS Note 1744063: development for this function has not yet finished and therefore contains some serious errors including program terminations.
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