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Code Packages Activity Actions 11

Make PostgreSQL failover work with distributed cache.

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This commit is contained in:
Guo Xiang Tan 2017-10-20 16:39:31 +08:00
parent 989280a222
commit fe1e78ddf4
4 changed files with 20 additions and 8 deletions
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9
lib/active_record/connection_adapters/postgresql_fallback_adapter.rb
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@ -7,10 +7,12 @@ class PostgreSQLFallbackHandler
include Singleton
attr_reader :masters_down
attr_accessor :initialized
def initialize
@masters_down = DistributedCache.new('masters_down')
@masters_down = DistributedCache.new('masters_down', namespace: false)
@mutex = Mutex.new
@initialized = false
end
def verify_master
@ -126,13 +128,12 @@ module ActiveRecord
else
begin
connection = postgresql_connection(config)
fallback_handler.master_down = false
fallback_handler.initialized ||= true
rescue PG::ConnectionBad => e
on_boot = fallback_handler.master_down?.nil?
fallback_handler.master_down = true
fallback_handler.verify_master
if on_boot
if !fallback_handler.initialized
return postgresql_fallback_connection(config)
else
raise e