static public void ReleaseCachedFeatureCollection(ICachedFeatureCollection cachedFeatureColledion)
{
CachedFeatureCollection collection = cachedFeatureColledion as CachedFeatureCollection;
if (collection != null)
{
collection.Released = true;
}
}
static public ICachedFeatureCollection CreateCachedFeatureCollection(Guid guid, IQueryFilter filter, int LifeTime)
{
lock (lockThis)
{
CachedFeatureCollection collection;
if (_collections.TryGetValue(guid, out collection))
{
return(null);
}
else
{
collection = new CachedFeatureCollection(guid, filter);
_collections.Add(guid, collection);
return(collection);
}
}
}
static public ICachedFeatureCollection GetUsableFeatureCollection(Guid guid, IQueryFilter filter)
{
CachedFeatureCollection collection = GetCachedFeatureCollection(guid) as CachedFeatureCollection;
if (collection == null || !collection.UsableWith(filter))
{
return(null);
}
if (collection.Released)
{
return(collection);
}
else
{
//
// Wait for release!!! (Hope there is no deadlocking)
//
if (Thread.CurrentThread != collection._myThread)
{
ManualResetEvent resetEvent = new ManualResetEvent(false);
collection._resetEvents.Add(resetEvent);
resetEvent.WaitOne(10000, false);
if (collection.Released)
{
return(collection);
}
}
else
{
throw new Exception("Can't use unreleased cached featurecollection\nWaiting thread is identical with work thread!\nDeadlocking situation!");
}
}
return(null);
}
