I would like to cache Persistent handles in such a way that I can retrieve
the same Persistent instance given the identical JS object, i.e. imagine a
function like so:
Persistent<Object> GetPersistentForObject(Local<Object> obj)
{
// If we have already created a Persistent for obj, find and return it.
// Otherwise, create and return a Persistent for obj and cache it for
// future calls.
}
The obvious thought is to store the Persistent handles in a map of some
kind, but what to use as the key? I assume it would not be possible to
actually use Local handles as keys in a map that outlives the current
HandleScope.
One thought I had was to assign a unique integer to the object using
obj.SetPrivate(...), and use that as the key, but SetPrivate is documented
as experimental, which is discouraging.
Is there an easier way to achieve what I'm trying to do? I feel like I may
be missing something obvious...
Jonathan
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