Update markers every once in a while (+cache)

[TechnicJelle]

Currently, the plugin creates markers for each sign, once when BlueMap loads.

The markers should probably update more often than that.

On a timer?
I don't really like that idea a whole lot...

Perhaps based on events from the server?
I like that a bit more, I think...
Although making this plugin cross-platform would be a bit more effort if I do that.
I think it'd probably be worth it, though.

Maybe I could also just base it off the world files changing, just like BlueMap does.
However, it may be nice if the signs were (near) instant.

[ShDis]

Is there a way to bind something like "PlayerPlacedSign" and "PlayerEditedSign" events to plugin code for instant updates?

[TechnicJelle]

There is a SignChangeEvent, but no dedicated SignPlacedEvent or SignRemovedEvent.
There is a BlockPlaceEvent that can be used to detect sign placements.
However, detecting sign removals is more difficult, as there are many different ways for a block to be removed. It can be mined by a player, or exploded.
And in the case of signs, the block it's attached to could be removed as well, causing it to pop off. And can signs burn? I'm not sure, but they are made of wood...

[TechnicJelle]

I've done a similar architecture in my Offline Player Markers addon, which loops through the playerdata NBT files on server startup to add the markers to the map, and from then on, it uses the server events to add/remove markers.
But even that plugin does not cache them...

Properly adding caching to something like this is very very difficult....
One of the challenges is having to take changes into account properly.