a web service that provides atomic advisory locking would be
pretty easy to write.
For that matter so would a datagram service, and that would be
more efficient.
Requests would include:
resource-ID-string
a character string uniquely identifying
what is getting locked
lock-disposition
SHARED, EXCLUSIVE, or UN. All requests
are nonblocking.
request-identifier
a character string uniquely identifying this
request, for robustness
timeout
how many seconds to wait before calling this
lock stale and breaking it
Responses would include:
request-identifier
copied from request
result
(lock-disposition) GRANTED
or FAILED
Security would be based on peer IP address, with the server
throwing away requests from unlisted peers (amounting to the
same thing as a firewall rule) Use a VPN to encrypt all traffic
if you want, rather than adding encryption features to the
remote resource locking protocol.
Have I just described something that already exists?
--
david nicol
"Take your time." -- Allan Quaterman
