Orion is a Mixin loader for Paper
Who uses this?
Definitely me and 2-3 people who contacted me to ask how to use it exactly.
So what are Mixins exactly?
Using mixins you can modify your server’s behaviour without patching the server’s code using Paper method, building, and testing it (and then realizing it didn’t event work).
Write your patches directly in Java and apply them with simply restarting your server, allowing you to test code changes way faster than before.
Yes, there is one public example which I wrote to showcase how to write server mods on Orion: ExampleMod
Okay, but how does it work?
Instead of launching
paperclip.jar, you need to launch
OrionLauncher.jar instead which will handle server launching yourself (you read it right - IT IS NOT A PLUGIN).
As a bonus, you’ll get semi-automatic server updating mechanism (if you delete
paperclip.jar from server directory, it’ll be downloaded again automatically)
Mixins are applied using Mixin library and good old LegacyLauncher (with few tweaks)
How can I use it?
OrionLauncher.jar instead of your server, put mods into
mods folder (and optionally check mod-specific configuration from
Also there’s a wiki:
Behavioural differences between Mixins on Sponge and Paper
Right now there are no ways to:
- Use MCP mappings (this is the most requested feature), so you must use
remap = false
You can use only Java 8 (preferably OpenJDK or Oracle’s). Orion does not support using anything newer than that.
Thanks for CodeMC for providing a CI for Minecraft-related projects
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