Use the `generate-code` goal of `quarkus-maven-plugin` to generate Java classes from your `*.proto`
service and message definitions stored in the `src/main/proto` directory:

[source,xml]
----
<build>
    <plugins>
        <plugin>
            <groupId>io.quarkus</groupId>
            <artifactId>quarkus-maven-plugin</artifactId>
            <executions>
                <execution>
                    <goals>
                        <goal>generate-code</goal>
                        <goal>build</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>
----

You may want to check the https://github.com/apache/camel-quarkus/tree/master/integration-tests/protobuf[integration test]
in our source tree as an example.
