March 2025
Intermediate to advanced
202 pages
4h 45m
English
Content preview from Real-World Event Sourcing
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Creating a Simple Process Manager
The canonical “hello world” sample of process managers is usually a batch processor. You’re going to build a process manager that advances the handling of a batch of files. The nature of these files or what needs to be done to them isn’t relevant to this exercise.
The process starts when an initiating event, batch_created, is received. From there, the process manager issues a single command requesting work from an aggregate for each of the files in the batch. Thereafter, the process manager keeps tabs on the processing status of each of the files, as shown in the figure.
The flow through the system in an error-free ...
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