This is a simple plugin that wraps the Hazelcast distributed maps in a Grails service,
enabling relatively easy caching.

To use:

Create an enum containing your cached map configuration in yourproject/src/groovy/yourproject/CachedMaps.groovy:

enum CachedMaps {
        MY_CACHE( [ timeToLiveSeconds: 30 ] ),
	MY_OTHER_CACHE( [ timeToLiveSeconds: 300 ] )

        def config
        final def defaultConfig = [ timeToLiveSeconds: 60, backupCount: 0 ]

        public CachedMaps(def config) {
                this.config = defaultConfig + config
        }
}

.. and add a reference to this enum in your Config.groovy:

hazelcast.cache.maps = yourproject.CachedMaps

Now, you can use cacheService to do cache lookups/pushes e.g. in your service classes:

def cacheService
def otherService

def methodUsingCachedData() {
	// check cache, if element with given key is found, return it
	cacheService.checkCache(CachedMaps.MY_CACHE, "cacheKey") {
		// if not, execute this closure, and store the returned value cache.
		// note that the closure for the cache key is blocking, and only
		// one cluster member will execute it at once. 
		otherService.expensiveOperation()
	}
}


TODO: 
	- better configuration (including wrappers for Hazelcast network config etc.)
	- caching e.g. responses and service methods via annotations