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Spring Boot Configuration Descriptor Processor Maven Plugin

Maven Central License

Description

When writing a service which has a lot of configuration, it is very useful to have a single document describing all possible properties of the service.

If the service binds properties to beans using @ConfigurationProperties, such beans with javadocs can be a single source of truth for the service configuration.

The goal of this plugin is to generate markdown description for all the @ConfigurationProperties.

Usage

To have this plugin work, it's required to have spring-boot-configuration-processor dependency that generates metadata /META-INF/spring-configuration-metadata.json which is used as a base for a resulting Markdown document.

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-configuration-processor</artifactId>
    <optional>true</optional>
</dependency>

And need to add the plugin to /build/plugins section of pom.xml.

<plugin>
    <groupId>ru.mihkopylov</groupId>
    <artifactId>spring-boot-configuration-properties-descriptor-maven-plugin</artifactId>
    <version>${spring-boot-configuration-properties-descriptor-maven-plugin.version}</version>
    <executions>
        <execution>
            <phase>compile</phase>
            <goals>
                <goal>describe</goal>
            </goals>
        </execution>
    </executions>
</plugin>

Once mvn compile is run, a result CONFIGURATION.md file will be generated. By default it will be placed to root directory beside pom.xml, but this can be configured.

Configuration

This is the default configuration:

<plugin>
    <groupId>ru.mihkopylov</groupId>
    <artifactId>spring-boot-configuration-properties-descriptor-maven-plugin</artifactId>
    <version>${spring-boot-configuration-properties-descriptor-maven-plugin.version}</version>
    <configuration>
        <!--the metadata json file generated by Spring-->
        <jsonFileName>${project.build.outputDirectory}/META-INF/spring-configuration-metadata.json</jsonFileName>
        <!--should the plugin fail if the json metadata file is not found-->
        <failIfNoMetadataFileFound>false</failIfNoMetadataFileFound>
        <!--where to put the result file-->
        <outputFileName>${basedir}/CONFIGURATION.md</outputFileName>
    </configuration>
</plugin>