Velocity

How to apply for Velocity

Since Velocity has exposed a API to append classes to the classpath, we don't need to have our own ClassLoader, and the setup is simple

velocity/build.gradle

 plugins {
     id 'java'
     id 'com.github.johnrengelman.shadow' version '7.0.0'
+    id 'dev.vankka.dependencydownload.plugin' version 'VERSION'
 }


 repositories {
     mavenCentral()
     maven {
         name = 'velocitypowered-repo'
         url = 'https://repo.velocitypowered.com/releases/'
     }
     maven {
         name = 'minecraft-libraries'
         url = 'https://libraries.minecraft.net/'
     }
     maven {
         name = 'spongepowered-repo'
         url = 'https://repo.spongepowered.org/maven'
     }
 }

 dependencies {
     compileOnly 'com.velocitypowered:velocity-api:1.1.0'
     annotationProcessor 'com.velocitypowered:velocity-api:1.1.0'

+    implementation 'dev.vankka:minecraftdependencydownload-velocity:VERSION'
 }

 jar {
+    dependsOn generateRuntimeDownloadResourceForRuntimeDownload
     finalizedBy shadowJar
 }

velocity/src/main/java/com/example/velocity/VelocityPlugin.java

package com.example.velocity;

...

@Plugin(
        id = "example-plugin",
        name = "ExamplePlugin",
        version = "1.0.0"
)
public class VelocityPlugin {

    @Inject
    private Logger logger;

    @Inject
    private ProxyServer proxyServer;

    @Inject
    @DataDirectory
    private Path pluginDirectory;

    @Subscribe
    public void onProxyInitialization(ProxyInitializeEvent event) {
        try {
            DependencyManager manager =  new DependencyManager(pluginDirectory.resolve("cache"));
            manager.loadFromResource(getClass().getClassLoader().getResource("runtimeDownload.txt"));

            Executor executor = Executors.newCachedThreadPool();
            manager.downloadAll(executor, Collections.singletonList(new StandardRepository("https://repo.example.com/maven2"))).join();
            manager.relocateAll(executor).join();
            manager.loadAll(executor, new VelocityClasspathAppender(this, proxyServer)).join();
        } catch (Throwable t) {
            logger.error("Failed to load dependencies", t);
            return;
        }
    }
}