private void removedCallback(string key, Object value, CacheItemRemovedReason reason)
{
if (reason == CacheItemRemovedReason.Expired)
{
BlockPathsRoll obj = (BlockPathsRoll)value;
// insertNew(key); // Not needed to keep it always in memory.
}
}
private BlockPathsRoll insertNew(string key)
{
BlockPathsRoll obj = new BlockPathsRoll(key); // if concurrency happens, this will be done more than once.
// todo: should put empty blocks into cache for ?
HttpRuntime.Cache.Insert(key, obj, null, DateTime.Now.AddSeconds(Config.DEFAULT_CACHE_SECONDS),
Cache.NoSlidingExpiration, CacheItemPriority.Default, removedCallback);
// expires after some time for multi-node synchronization (unreliable).
return(obj);
}
private BlockPathsRoll get(int block_idx_x, int block_idx_y)
{
// be careful of name conflict from other ponds using the same cache.
string key = Config.DRAWING_PAR_KEY_PREFIX + block_idx_x.ToString() + ',' + block_idx_y.ToString();
BlockPathsRoll obj = (BlockPathsRoll)HttpRuntime.Cache.Get(key);
if (obj == null)
{
obj = insertNew(key);
}
return(obj);
}
public int AddPath(PathModel model)
{
int ret = DrawingStore.AddPath(model);
if (ret == 0 || ret == 3)
{
string key = Config.DRAWING_PAR_KEY_PREFIX + model.BlockIndexX.ToString() + ',' + model.BlockIndexY.ToString();
BlockPathsRoll obj = (BlockPathsRoll)HttpRuntime.Cache.Get(key);
if (obj != null)
{
obj.AddPath(model);
}
}
return(ret);
}
public IEnumerable <PathModel> GetBlockPaths(int block_idx_x, int block_idx_y)
{
BlockPathsRoll roll = this.get(block_idx_x, block_idx_y);
return(roll.Get());
}
