This builds on previous performance improvements to the list behavior by
reducing the number of queries against the database and the amount of
data transfered in order to retrieve a list of sessions. Previously, a
query was performed to retrieve a tuple of `(session_id, scope_id,
user_id)` for the requested scope, including all child scopes if the
request was recursive. These tuples were evaluated against the
requesting user's grants to identify the sessions that they were
authorized to list. In the case of clusters with a large number of
sessions, this would result in a large amount of data needing to be
transfered for sessions that would not be used. Then a second query
would be used to retrieve the full session information for the session
ids that were authorized.
This changes the list behavior to evaluate a set of permissions from
the requesting user's grants, use these permissions when constructing a
session repository, and retrieve the list of sessions the user is
authorized to list in a signle query.
Ref:
d74103482932070678dc
Timothy Messier
68568828e6