diff options
Diffstat (limited to 'lib/gitlab/exclusive_lease.rb')
-rw-r--r-- | lib/gitlab/exclusive_lease.rb | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/lib/gitlab/exclusive_lease.rb b/lib/gitlab/exclusive_lease.rb index 62ddd45785d..a0f46594eb1 100644 --- a/lib/gitlab/exclusive_lease.rb +++ b/lib/gitlab/exclusive_lease.rb @@ -10,13 +10,21 @@ module Gitlab # ExclusiveLease. # class ExclusiveLease - LUA_CANCEL_SCRIPT = <<-EOS.freeze + LUA_CANCEL_SCRIPT = <<~EOS.freeze local key, uuid = KEYS[1], ARGV[1] if redis.call("get", key) == uuid then redis.call("del", key) end EOS + LUA_RENEW_SCRIPT = <<~EOS.freeze + local key, uuid, ttl = KEYS[1], ARGV[1], ARGV[2] + if redis.call("get", key) == uuid then + redis.call("expire", key, ttl) + return uuid + end + EOS + def self.cancel(key, uuid) Gitlab::Redis.with do |redis| redis.eval(LUA_CANCEL_SCRIPT, keys: [redis_key(key)], argv: [uuid]) @@ -42,6 +50,15 @@ module Gitlab end end + # Try to renew an existing lease. Return lease UUID on success, + # false if the lease is taken by a different UUID or inexistent. + def renew + Gitlab::Redis.with do |redis| + result = redis.eval(LUA_RENEW_SCRIPT, keys: [@redis_key], argv: [@uuid, @timeout]) + result == @uuid + end + end + # Returns true if the key for this lease is set. def exists? Gitlab::Redis.with do |redis| |