Class: App47Cache

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/models/app47_cache.rb

Overview

Public: Provide a common interface to redis cache

Examples

RedisCacheService.delete("key name")
# => the value of the key deleted

RedisCacheService.get("key name")
# => the value of the key

Class Method Summary collapse

Class Method Details

.delete(key) ⇒ Object

Delete a key from cache

key - the key to delete



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# File 'lib/models/app47_cache.rb', line 32

def delete(key)
  redis.del key
end

.get(key) ⇒ Object

Get a key from cache

key - the key to fetch, if key is not found, returns nil



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# File 'lib/models/app47_cache.rb', line 41

def get(key)
  return nil if ENV['RACK_ENV'].eql?('staging')

  value = redis.get key
  value.nil? ? nil : Marshal.restore(value)
rescue StandardError
  nil
end

.redis ⇒ Object

Return the redis connection



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# File 'lib/models/app47_cache.rb', line 23

def redis
  @redis ||= Redis.new(RedisConfiguration.load(12))
end

.set(key, value, ttl = nil) ⇒ Object

Set a key with a value and TTL

key - the key to delete value - the value to set ttl(optional) - optional time to live parameter, default is no ttl, live forever

Returns the value passed in



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# File 'lib/models/app47_cache.rb', line 59

def set(key, value, ttl = nil)
  in_value = Marshal.dump value
  if ttl
    redis.setex key, ttl, in_value
  else
    redis.set key, in_value
  end
  value
end