Java Vienna Talk

Topic: Messaging with Spring - ActiveMQ vs. RabbitMQ (21.10.2024)

Speaker: Milan Gogic

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This Repository contains examples from the Java Vienna meetup talk, 21.10.2024

There are two examples:

• ActiveMQ Example

• RabbitMQ Example

All the examples are created as a Multi-Module maven projects, in order to easily turn apps on and off during the presentation of specific possibilities.

Both examples have a shared-dependencies sub-module, where common dependencies are defined.

Endpoints

Endpoints for both examples are provided under producer-service/test/*.http files.

Prerequisits

To successfully run the examples, one needs to install docker on the local machine. Docker compose files are provided under root/compose.yml files

ActiveMQ example

Messaging pattern: Pub/Sub

This example consists of 3 sub-modules:

• durable-consumer-service
• non-durable-consumer-service
• producer-service

Producer-service exposes one endpoint, and by calling that endpoint, with the message body as a query parameter(name of param is message), a message will be sent to the topic and consumed by subscribers.

ActiveMQ console is runnning on http://localhost:8161/

RabbitMQ example

Exchange types implemented:

• Fanout
• Topic

This example consists of 3 sub-modules:

• fanout-consumer-service
• topic-consumer-service
• producer-service

Producer-service exposes two endpoints, one for sending messages to fanout and another for sending messages to topic.

For the fanout exchange endpoint, only the message body should be sent as a query parameter(name of param is message), and for the topic exchange endpoint, message AND routing_key should be sent.

Routing patterns used for topic exchange can be checked in io.viesure.config.TopicConsumerConfig

RabbitMQ console is running on http://localhost:15672