Class: DistributedMemoizer
- Inherits:
-
Object
- Object
- DistributedMemoizer
- Defined in:
- lib/distributed_memoizer.rb
Constant Summary collapse
- MAX_WAIT =
never wait for longer that 1 second for a cross process lock
1
Class Method Summary collapse
-
.memoize(key, duration = 60 * 60 * 24, redis = Discourse.redis) ⇒ Object
memoize a key across processes and machines.
- .redis_key(key) ⇒ Object
- .redis_lock_key(key) ⇒ Object
Class Method Details
.memoize(key, duration = 60 * 60 * 24, redis = Discourse.redis) ⇒ Object
memoize a key across processes and machines
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# File 'lib/distributed_memoizer.rb', line 8 def self.memoize(key, duration = 60 * 60 * 24, redis = Discourse.redis) redis_lock_key = self.redis_lock_key(key) redis_key = self.redis_key(key) DistributedMutex.synchronize(redis_lock_key, redis: redis, validity: MAX_WAIT) do result = redis.get(redis_key) unless result result = yield redis.setex(redis_key, duration, result) end result end end |
.redis_key(key) ⇒ Object
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# File 'lib/distributed_memoizer.rb', line 28 def self.redis_key(key) "memoize_#{key}" end |
.redis_lock_key(key) ⇒ Object
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# File 'lib/distributed_memoizer.rb', line 24 def self.redis_lock_key(key) "memoize_lock_#{key}" end |