private long lastNumHits; // for stats
internal AdaptiveDirectoryCacheMaintainer(
LocalGrainDirectory router,
AdaptiveGrainDirectoryCache <TValue> cache,
Func <List <ActivationAddress>, TValue> updateFunc,
IInternalGrainFactory grainFactory,
ExecutorService executorService,
ILoggerFactory loggerFactory)
: base(executorService, loggerFactory)
{
this.updateFunc = updateFunc;
this.grainFactory = grainFactory;
this.router = router;
this.cache = cache;
lastNumAccesses = 0;
lastNumHits = 0;
OnFault = FaultBehavior.RestartOnFault;
}
/// <summary>
/// Gets the list of grains (all owned by the same silo) and produces a new list
/// of tuples, where each tuple holds the grain and its generation counter currently stored in the cache
/// </summary>
/// <param name="grains">List of grains owned by the same silo</param>
/// <returns>List of grains in input along with their generation counters stored in the cache </returns>
private List <Tuple <GrainId, int> > BuildGrainAndETagList(IEnumerable <GrainId> grains)
{
var grainAndETagList = new List <Tuple <GrainId, int> >();
foreach (GrainId grain in grains)
{
// NOTE: should this be done with TryGet? Won't Get invoke the LRU getter function?
AdaptiveGrainDirectoryCache <TValue> .GrainDirectoryCacheEntry entry = cache.Get(grain);
if (entry != null)
{
grainAndETagList.Add(new Tuple <GrainId, int>(grain, entry.ETag));
}
else
{
// this may happen only if the LRU cache is full and decided to drop this grain
// while we try to refresh it
Log.Warn(ErrorCode.Runtime_Error_100199, "Grain {0} disappeared from the cache during maintainance", grain);
}
}
return(grainAndETagList);
}