The concurrent access occurred in the region merge/split logic,
as it did not own the ticket lock. To resolve this, we simply
make the ticket add/remove acquire the read lock of
the region lock.
Sometimes a region is empty, but only when the threaded regioniser
crashes. So, it should not prevent shutdown.
Additionally, only remove pending teleports after setting the
current region.
This will prevent a race condition where the region is cancelled
and immediately re-scheduled, and where this all happens while
the tick thread is blocking on tryMarkTicking.
Everyone had access to /tps for the private tests, but we cannot
trust everyone to use it responsibly for the public test
(i.e revealing coordinates of all logged in players).
In the case that the entity has a null callback, it means the
entity has not been added to the world - so, we should treat
it the same as entity#isRemoved.
This may be useful for plugins which want to perform operations
over large areas outside of the buffer zone provided by the
regionaliser, as it is not guaranteed that anything outside
of the buffer zone is owned. Then, the plugins may use
the schedulers depending on the result of the ownership
check.
This event allows plugins to perform synchronous operations before
any region will tick. Plugins will not have to worry about the
possibility of a region ticking in parallel while listening
to the event.
- Add thread check for loadChunk
- Make isChunkGenerated use the region task queue to schedule
to "main"
- Don't complete async chunk future if not in the owning thread
for the chunk
Plugins must add "folia-supported: true" to their plugin.yml
otherwise the server will refuse to load them.
Since Folia is a major breakage for plugins, the vast majority
of plugins will not function correctly on Folia. To prevent
user confusion from this, we will refuse to load the plugin
and provide a log indicating why - which will be much
more helpful than some random error log caused by
a breakage.
The generics pose a problem, and the parameter passed to the
Consumer is not needed in API.
Additionally, stop trying to cancel Bukkit scheduler tasks on
plugin disable as the Bukkit scheduler does not work.
We should only iterate over the local region's entities, not the
global entity list to set up the spawner state, as everything else
about the spawner state (player count / chunk count) is regionised.
Additionally, move the last spawner state to regionised state so that
paper mobcaps command functions as expected.
It turns out, the scheduler is good enough right now - the main
bottlenecks to scaling chunk workers is actually the chunk
system locking behavior (mostly schedule lock, but ticket lock
is there too)
