id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
6396	(Experimental PATCH) Allow plugins to be reloaded without restart	olejorgenb	olejorgenb	"I have a tendency to test my code very (or maybe too ;) often so I'm starting to get pretty sick of watching the JOSM load screen by now.

Decided to scratch my itch, and here is the result.

The patch introduces a new method in `Plugin` called `preReloadCleanup`. All loaded/active plugins implementing this will be reloaded when `ReloadPluginsAction` is performed. (They don't have to use `Plugin` as a baseclass)

It's not really tested beyond checking that the new classes actually are loaded and used. Would be beneficial if a java guru could take a look and see if my classloader magic is mostly correct.

Known limitations:
1. If p1 requires p2 and only p2 is re-loadable, two versions of p2 will be in use. That can't be good. (Not checked, but I'm quite sure this applies)
2. `checkLoadPreconditions` is not run on the plugins before reload. Fair to assuming the conditions are fulfilled as the plugins are already loaded, but it isn't 100% correct.
3. Doesn't respect the early/late flags. Is that important?
4. Probably need more functions in `MapFrame` supporting `preReloadCleanup`. (only `removeMapMode` is implemented now)

This feature is mostly for the plugin-developer's benefit, so it doesn't have to be perfect before inclusion, IMHO."	enhancement	new	normal		Core	latest		plugin