Creating Software with Modern Diagramming Techniques by Ashley Peacock

Creating Software with Modern Diagramming Techniques by Ashley Peacock

Author:Ashley Peacock
Language: eng
Format: epub, pdf
Tags: Pragmatic Bookshelf
Publisher: The Pragmatic Bookshelf, LLC


Once again, we’ve used a subgraph to define a boundary—this time, the boundary is the web application container. Components within that container are defined with a new style, a pale blue, to differentiate them from components.

We still include the interactions between components and any outside external systems or containers. I find it useful to always include the callers of the components above the boundary—in our case, the mobile application and the web browser. Below the boundary, we still have the external services that are called by components, as well as one of our own containers, the Redis cache.

Keep in mind, each container can have a component diagram, so if you have a lot of containers and decide to create component diagrams, you’ll end up creating a large number of component diagrams that you’ll need to try to keep up-to-date. Naturally, there’s no need to do component diagrams for third-party products such as Redis, as that’s essentially a black box that you don’t need to model.

That’s it for component diagrams. Before finishing the modeling architecture chapters, we’ll quickly look at the code diagram in C4, just to understand why creating this level of detail isn’t usually worthwhile.



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