Gets the record value corresponding to key.
If the caller and getData use some sort of multitasking (fibers) it is possible that while getData is busy it does a reentrant call of this method with the same key. In this case it will return null, even though the record may exist.
record key
the record value or null if either not found or currently waiting for getData to fetch the value for this key.
See Implementation
Gets the record value corresponding to key.
If the caller and getData use some sort of multitasking (fibers) it is possible that while getData is busy it does a reentrant call of this method with the same key. In this case it will return null, even though the record may exist.