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Remove now unused pick_server_from_list

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This commit is contained in:
Erik Johnston 2019-08-20 11:50:12 +01:00
parent 1f9df1cc7b
commit 74f016d343
1 changed files with 0 additions and 30 deletions
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30
synapse/http/federation/srv_resolver.py
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@ -53,36 +53,6 @@ class Server(object):
expires = attr.ib(default=0)
def pick_server_from_list(server_list):
"""Randomly choose a server from the server list
Args:
server_list (list[Server]): list of candidate servers
Returns:
Tuple[bytes, int]: (host, port) pair for the chosen server
"""
if not server_list:
raise RuntimeError("pick_server_from_list called with empty list")
# TODO: currently we only use the lowest-priority servers. We should maintain a
# cache of servers known to be "down" and filter them out
min_priority = min(s.priority for s in server_list)
eligible_servers = list(s for s in server_list if s.priority == min_priority)
total_weight = sum(s.weight for s in eligible_servers)
target_weight = random.randint(0, total_weight)
for s in eligible_servers:
target_weight -= s.weight
if target_weight <= 0:
return s.host, s.port
# this should be impossible.
raise RuntimeError("pick_server_from_list got to end of eligible server list.")
def _sort_server_list(server_list):
"""Given a list of SRV records sort them into priority order and shuffle
each priority with the given weight.