Prerequisites:

• Basic Java Knowledge
• An IDE to work in

Step 1: Add Glucose API as dependency

Gradle

1. Add the repository

repositories {
    maven {
        url = "https://repo.zenoc.net/repository"
    }

2. Add the dependency

dependencies {
   implementation 'ml.glucosedev:GlucoseLib:1.0.6-BETA'
}

Step 2: Your main class

There's a serverStartEvent() which is called when the server starts. You can put statements in here to do when the server starts. Consider the following example

public void serverStartEvent() {
        System.out.println("Green eggs and ham");
    }

Step 3: glucose.inf

glucose.inf tells the server what your plugin is called, its ID, main class, and all sorts of other jazz. Example:

main-class: com.verycool.my.amazing.plugin.Main
name: My amazing plugin
id: myamazingplugin

Step 4: Build

build your plugin, put it into the plugins directory on your server. You should see something like this before the world loads.

[17:28:13] [Glucose/PluginLoader] [Server thread/INFO]: Loading plugins...
[17:28:13] [Glucose/PluginLoader] [Server thread/INFO]: Loading plugin: TestPlugin1-1.0-SNAPSHOT.jar
[17:28:13] [net.minecraft.server.LoggedPrintStream] [Server thread/INFO]: [STDOUT]: Green eggs and ham