If and else in sequence diagram2/26/2024 ![]() The parallel vertical lines underneath these participants are lifelines. In Figure 2, User, Web Distribution, and Origin Request are each actors or system participants. Let’s investigate the system use case where the API is called without a header indicating the requested version using a Sequence Diagram. I use this diagram type for analysis and design purposes and to validate my assumptions about data flows in distributed architectures. Sequence Diagrams model the ordered logic of usage scenarios in a consistent visual manner and capture detailed behaviors. Sequence Diagrams are part of a subset of behavior diagrams known as interaction diagrams, which emphasis control and data flow. High-level architecture diagram Sequence Diagrams It also demonstrates behavioral aspects from a Communication Diagram, which uses messages represented by arrows labeled with chronological numbers.įigure 1. It includes structural aspects from a high-level Deployment Diagram, which depicts network connections between AWS services.
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