[jsscripting] Added simple Shared Cache into scope

[jpg0]

Add a very basic shared cache into the JS add-on to allow JS scripts to cache objects between runs and/or scripts.

Signed-off-by: Jonathan Gilbert jpg@trillica.com

[jpg0]

Can be used like this:

let counter = require("@runtime").sharedcache.getOrCreate("counter", () => ({"times":0}))

counter.times = counter.times + 1
 
Java.type('org.slf4j.LoggerFactory').getLogger('script.js.cachetest').warn("count: " + counter.times); 

Which will increment the counter each time the script is run.

[digitaldan]

Should we also expose remove(Object key) ?

[jpg0]

Should we also expose remove(Object key) ?

Yes I think that's sensible.

[digitaldan]

LGTM!

[lolodomo]

LGTM