grails - Application wide map -

i want quartz job populate map (from web services call) on regular intervals , access map web layer (to display user).

i thinking doing service (given service singleton), bit worried the recommendation not store state in service.

class mapservice {     def map = [:] } 

what best way this?

if not worrying keeping data in memory while app running, can use concurrenthashmap in service , store data need. @ cache not reliable storage though.

as said, services singleton only 1 instance of service ever exists , concurrentmap a hash table supporting full concurrency of retrievals , adjustable expected concurrency updates.

ex:

calss myservice() {      concurrenthashmap cachemap = [:]      def retrievecache(string key) {         cachemap[(key)]     }      def resetcache(){         cachemap = [:]     }      def dosomething(){         ..         cachemap.put(key,value)     }  } 

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