Comala Publishing provides a Java API for other add-ons to extend.

Setup

Add the Comalatech Maven repository to you .m2/settings.xml file or your project pom.xml.

<repository>
    <id>comalatech-public</id>
    <url>https://nexus.comalatech.com/content/groups/public/</url>
    <snapshots>
        <enabled>true</enabled>
    </snapshots>
    <releases>
        <enabled>true</enabled>
    </releases>
</repository>

Add a dependency on the publishing api library to your project

<dependency>
    <groupId>com.comalatech</groupId>
    <artifactId>publishing-api</artifactId>
    <version>2.8.0</version>
    <scope>provided</scope>
</dependency>

Using the API

Currently the API provides a range of events that can be listened to via Confluence event listeners.  This allows your add-on to take some additional action once a publishing action has taken place.

View the Java API docs.