Make the server independent of the standard world

[feeeedox]

Is your feature request related to a problem?

I just encountered an error when programming a plugin that the main world is not unloaded. The problem is because Bukkit currently needs the main world to do things like calculate ticks (I was told), and in some cases it is really annoying to use alternatives for your plugin, for example I just wanted to write a system where the world is unloaded, deleted, and then regenerated. But that doesn't work without a server restart, which means I would have to use an alternative.

Describe the solution you'd like.

I would like it if all important things like tick calculation or rather everything that needs the main world is moved, or somehow programmed so that the server no longer needs the main world.

Describe alternatives you've considered.

Alternatively, if unloading doesn't work, it would be good to include an option to regenerate worlds without having to delete them first.

Other

No response

[Warriorrrr]

Provide the error you encountered

[electronicboy]

Mojangs game server is not written with the concept that the main world can disappear, and I'm generally not sure that it's worth it for us to invest into the work for this, especially with the backlog of other world system related issues in regards to how mojang manages its data lifecycle

[feeeedox]

Provide the error you encountered

That's the point, there is no error. If the ChunkHolderManager or the UnloadWorld Method would tell me that the main world can't be unloaded, that would be fine. But I've been sitting here for 2 hours trying to find a solution as to why the main world is not unloading properly.

[lynxplay]

The generally used "alternative" here is to code around that by keeping the single main level as minimal as possible (e.g. void, no entities, no time, no weather) and just accept it as a "semi" no-op.
As cat stated, redoing this is not as simple as flipping a switch in one place. We should probably then correctly throw something if someone attempts to unload the main world.

[masmc05]

UnloadWorld Method would tell me that the main world can't be unloaded, that would be fine.

It was telling you that, but most probably you were ignoring the returned boolean