Class: RedisClient::Cluster::OptimisticLocking

Inherits:
Object
  • Object
show all
Defined in:
lib/redis_client/cluster/optimistic_locking.rb

Instance Method Summary collapse

Constructor Details

#initialize(router) ⇒ OptimisticLocking

Returns a new instance of OptimisticLocking.



9
10
11
12
 
# File 'lib/redis_client/cluster/optimistic_locking.rb', line 9

def initialize(router)
  @router = router
  @asking = false
end

Instance Method Details

#watch(keys) ⇒ Object

rubocop:disable Metrics/AbcSize

Raises:



14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
 
# File 'lib/redis_client/cluster/optimistic_locking.rb', line 14

def watch(keys) # rubocop:disable Metrics/AbcSize
  slot = find_slot(keys)
  raise ::RedisClient::Cluster::Transaction::ConsistencyError, "unsafe watch: #{keys.join(' ')}" if slot.nil?

  handle_redirection(slot, retry_count: 1) do |nd|
    nd.with do |c|
      c.ensure_connected_cluster_scoped(retryable: false) do
        c.call('asking') if @asking
        c.call('watch', *keys)
        begin
          yield(c, slot, @asking)
        rescue ::RedisClient::ConnectionError
          # No need to unwatch on a connection error.
          raise
        rescue StandardError
          c.call('unwatch')
          raise
        end
      rescue ::RedisClient::CommandError => e
        @router.renew_cluster_state if e.message.start_with?('CLUSTERDOWN')
        raise
      end
    rescue ::RedisClient::ConnectionError
      @router.renew_cluster_state
      raise
    end
  end
end