Feature #14087
Updated by Peter Amstutz over 5 years ago
Fulfill a GET request for a collection by PDH by querying the federation. # Match GET request for collection by PDH # Send request to the local cluster # If success, return result # If 404, failure, send parallel (in parallel) requests to list of federated sites defined in discovery document. # On the first successful result, alter the signature hints in the returned record so keepstore will be able to get the data from the remote cluster (see Federated collections wiki and #13993) # Return first result # If all requests fail / time out, return error. Either 404 (if all sites return 404) 502 (Bad Gateway) or 504 (Gateway timeout) depending on the type of failure (return 5xx error only when it makes sense for failure. TBD: * How is the client list of federated sites defined? Can start with remote hosts list in discovery document. * When user uses federated identity on a remote cluster, this calls back to retry). the home cluster, which could record the remote cluster as the user's "personal federation".