Add a new item to the cache, returning a IOStream to the new item.
The key and the path combine to form a unique key used to store the item.
Potentially, expiry processing will be performed while this call is executing.
The returned IOStream is referenced for thread-safety and must be unreferenced with unref when finished with it.
| this | |
| path |
Relative path of item to add. |
| key |
Key of item to add. |
|
a IOStream for the new cache item, or null on error |