38 lines
1.6 KiB
Markdown
38 lines
1.6 KiB
Markdown
# Event Brokering with Spring Boot and RabbitMQ
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This application implements an Event mechanism usable in Microservice environments.
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## Companion Blog Article
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The companion blog article to this repository can be found [here](https://reflectoring.io/event-messaging-with-spring-boot-and-rabbitmq/).
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## Scenario
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* a publisher publishes events with one of these topics
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* customer.created
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* customer.edited
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* customer.deleted
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* order.created
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* order.edited
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* order.deleted
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* invoice.created
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* invoice.edited
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* invoice.deleted
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* a subscriber subscribes to events of a specific topic from
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a queue specific to its (micro-)service
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## Usage
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1. [Install RabbitMQ](https://www.rabbitmq.com/download.html) (if it's installed on another
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host than localhost then you need to change the connection properties in `application.properties`)
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1. start a couple instances of the demo application in `subscriber` mode, for example:
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* `./gradlew bootrun -Dspring.profiles.active=subscriber -Dsubscriber.queue=service1Queue -Dsubscriber.routingKey=customer.*`
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* `./gradlew bootrun -Dspring.profiles.active=subscriber -Dsubscriber.queue=service2Queue -Dsubscriber.routingKey=.*created`
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* `./gradlew bootrun -Dspring.profiles.active=subscriber -Dsubscriber.queue=service3Queue -Dsubscriber.routingKey=*.*`
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1. start a single instance of the demo application in `publisher` mode:
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* `./gradlew bootrun -Dspring.profiles.active=publisher`
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1. check the log output of the publisher and the subscribers to see which events are produced and which events
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are consumed by each subscriber
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