Matrix-Mirrors/anonymousland-synapse
1
0
Fork 0
mirror of https://git.anonymousland.org/anonymousland/synapse.git synced 2024-10-01 11:49:51 -04:00
Code Issues Packages Projects Releases Wiki Activity

Fixup _sort_server_list to be slightly more efficient

Browse Source 
Also document that we are using the algorithm described in RFC2782 and
ensure we handle zero weight correctly.
This commit is contained in:
Erik Johnston 2019-08-20 11:49:44 +01:00
parent 7777d353bf
commit 1f9df1cc7b
1 changed files with 11 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
synapse/http/federation/srv_resolver.py
View File

@ -94,10 +94,18 @@ def _sort_server_list(server_list):
results = [] results = []
for priority in sorted(priority_map): for priority in sorted(priority_map):
servers = priority_map.pop(priority) servers = priority_map[priority]
# This algorithms follows the algorithm described in RFC2782.
#
# N.B. Weights can be zero, which means that you should pick that server
# last *or* that its the only server in this priority.
# We sort to ensure zero weighted items are first.
servers.sort(key=lambda s: s.weight)
total_weight = sum(s.weight for s in servers)
while servers: while servers:
total_weight = sum(s.weight for s in servers)
target_weight = random.randint(0, total_weight) target_weight = random.randint(0, total_weight)
for s in servers: for s in servers:
@ -108,6 +116,7 @@ def _sort_server_list(server_list):
results.append(s) results.append(s)
servers.remove(s) servers.remove(s)
total_weight -= s.weight
return results return results