Sha256: 07a396641d8de18b6c007bc08aa46c69db979696de030655fef2e3d491fe1c0b
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Size: 1.69 KB
Versions: 6
Compression:
Stored size: 1.69 KB
Contents
require 'dalli-elasticache'
require 'alephant/logger'
module Alephant
module Broker
module Cache
class Client
include Logger
DEFAULT_TTL = 2592000
def initialize
unless config_endpoint.nil?
@elasticache ||= ::Dalli::ElastiCache.new(config_endpoint, { :expires_in => ttl })
@client ||= @elasticache.client
else
logger.debug "Broker::Cache::Client#initialize: No config endpoint, NullClient used"
logger.metric "NoConfigEndpoint"
@client = NullClient.new
end
end
def get(key, &block)
begin
versioned_key = versioned key
result = @client.get versioned_key
logger.info "Broker::Cache::Client#get key: #{versioned_key} - #{result ? 'hit' : 'miss'}"
logger.metric "GetKeyMiss" unless result
result ? result : set(key, block.call)
rescue StandardError => e
block.call if block_given?
end
end
def set(key, value, ttl = nil)
value.tap { |o| @client.set(versioned(key), o, ttl) }
end
private
def config_endpoint
Broker.config['elasticache_config_endpoint']
end
def ttl
Broker.config['elasticache_ttl'] || DEFAULT_TTL
end
def versioned(key)
[key, cache_version].compact.join('_')
end
def cache_version
Broker.config['elasticache_cache_version']
end
end
class NullClient
def get(key, &block)
yield
end
def set(key, value, ttl = nil)
value
end
end
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems