Adding the dependency

One artifact, com.uxplima.claim:bukkit-api, gives you the entry point, the facades, the command objects, the domain model and the events. The current version is 3.7.0.

Gradle and Maven

repositories {
    maven { url = 'https://repo.uxplima.com/repository/maven-releases/' }
    maven { url = 'https://repo.uxplima.com/repository/maven-snapshots/' }
}

dependencies {
    compileOnly 'com.uxplima.claim:bukkit-api:3.7.0'
}

<repositories>
    <repository>
        <id>uxplima-releases</id>
        <url>https://repo.uxplima.com/repository/maven-releases/</url>
    </repository>
    <repository>
        <id>uxplima-snapshots</id>
        <url>https://repo.uxplima.com/repository/maven-snapshots/</url>
    </repository>
</repositories>

<dependencies>
    <dependency>
        <groupId>com.uxplima.claim</groupId>
        <artifactId>bukkit-api</artifactId>
        <version>3.7.0</version>
        <scope>provided</scope>
    </dependency>
</dependencies>

What the artifact contains

bukkit-api re-exports the other two, so you declare only bukkit-api. The Spigot API is not included: your build already has it.

Use compileOnly or provided, never shade. uxmClaims is already on the server, and a shaded copy is a second, disconnected set of classes that the running plugin does not know.

Declaring the dependency

In your plugin.yml:

softdepend:
  - uxmClaims

Use softdepend if your plugin works without it, depend if it does not. Either way your plugin enables after uxmClaims.

Guarding the call

if (!Bukkit.getPluginManager().isPluginEnabled("uxmClaims")) {
    getLogger().info("uxmClaims not found, claim integration disabled.");
    return;
}

UxmClaimBukkitAPI api = UxmClaimBukkitAPI.getInstance();

getInstance() throws IllegalStateException (uxmClaims is not initialized yet!) until uxmClaims has finished starting. Calling it from a static initialiser or from onLoad hits this. So does a server where uxmClaims disabled itself at startup, for example over a missing licence key or a database another server holds: isPluginEnabled is the check that covers that case.

Requirements

Related: The API, Events