11/29/2023 0 Comments Microservices message queueFor cron jobs you need to be more specific: it is possible to show timing events/constraints in several behavioral diagrams (see this question for example). P.S: There is no DB diagram in UML: you'd use a class diagram and show only the classes relevant for the DB. You could also use them to document a flow of events across several microservices (each represented with a partition in the UML diagram) if deemed useful. Topics and Kafka partitions).Īctivity diagrams can show complex workflows (including sending and accepting events). In a deployment diagram, you'd show the real distribution of all your Kafka nodes, with some annotations about what each is doing (e.g. Your microservices would be other components. Maybe a couple more interfaces depending on your needs. In a component diagram, Kafka would be a component, with a Subscriber, and a Publisher interface provided. It's not fully clear what other diagrams you are looking for: There's nothing foreseen for production os signals, but you could show with a dependency arrow for the relevant operations of your class what signals they could send. You can show consumer classes by showing that they have receptions (i.e.Mizu is a Kubernetes-aware deep inspection tool that lets you inspect the traffic between your microservices. Signals are like classes and allow to describe the content of Kafka event/messages (attributes of the signal). My journey of understanding the similarities and differences began with the objective of adding support of several message queue protocols like AMQP, Apache Kafka, Redis etc.In a class diagram, you'd probably focus on your own classes and the description of the signals: But that would make the diagram much more complex, exspecially if you have more than one producer and one consumer. But if you prefer to show the full picture, you could insert a lifeline for Kafka and let consumers and producers exchange messages with Kafka. You would probably want to show the big picture, showing producers and consumers (classes or even microservice components) dialoguing, as if it would be directly between them, without showing the plumbing (Kafka, or other event-queues). The name of the message would be the name of the signal (probably the Kafka topic) optinally followed by the attributes of the signal between parenthesis. In a sequence diagram, you could show the exchange of messages/signals between participating lifelines. The core of a microservice architecture using Kafka is asynchronous communication of event messages. Message queues can also be used in a non-event driven architecture, for instance, to perform asynchronous request/response communication.
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