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Add the broker-comparison module

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Kafka, RabbitMQ and Pulsar measured side by side on ordering, replay and
consumer scaling by driving the three client libraries directly, plus an
operational-footprint measurement of each broker's own distribution.

Nine tests, three brokers started without Docker, and every number in the
documentation regenerated by scripts/run-all.sh.
This commit is contained in:
Ankur Mhatre
2026-09-01 23:27:08 +05:30
parent f4b0112e2c
commit e7e64a047b
30 changed files with 1836 additions and 7 deletions
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broker-comparison/pom.xml Normal file
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<project xmlns="http://maven.apache.org/POM/4.0.0">
<modelVersion>4.0.0</modelVersion>
<!-- Every client version below is managed by spring-boot-dependencies 4.1.1, so the three
brokers are compared at the versions a Boot 4.1 application would actually get:
kafka-clients 4.2.1, amqp-client 5.30.0, pulsar-client 4.2.4. Read from
spring-boot-dependencies-4.1.1.pom, not from release announcements. -->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>4.1.1</version>
<relativePath/>
</parent>
<groupId>com.ankurm</groupId>
<artifactId>broker-comparison</artifactId>
<version>1.0</version>
<packaging>jar</packaging>
<properties>
<java.version>25</java.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<!-- The three client libraries, driven directly. The comparison is between the brokers'
delivery models, and going through three different Spring abstractions would put three
different sets of defaults between the measurement and the thing being measured.
What each Boot starter adds on top is covered in docs/06-what-spring-adds.md. -->
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka-clients</artifactId>
</dependency>
<dependency>
<groupId>com.rabbitmq</groupId>
<artifactId>amqp-client</artifactId>
</dependency>
<dependency>
<groupId>org.apache.pulsar</groupId>
<artifactId>pulsar-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- Provides the in-process KRaft broker used by the Kafka measurements: a real Kafka
broker, no Docker. -->
<dependency>
<groupId>org.springframework.kafka</groupId>
<artifactId>spring-kafka-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<!-- Each broker is started by its own script and the matching tagged tests are run on
their own; see scripts/run-all.sh, which passes -Dgroups=kafka|rabbit|pulsar. Running
"mvn test" with no group runs all three and needs all three brokers up. -->
</project>