ritikesh

# irb
SOME_CONSTANT = "SOME_CONSTANT%{value}"
puts SOME_CONSTANT % {value: "abcd.freshservice.com"}
> "SOME_CONSTANT:abcd.freshservice.com"

ritikesh

# irb
SOME_CONSTANT = "SOME_CONSTANT"
puts "#{SOME_CONSTANT}#{'abcd.freshservice.com'}"
> "SOME_CONSTANT:abcd.freshservice.com"

ritikesh

module Memcache
  KEY_HASH = YAML.load_file(File.join(Rails.root, 'config', 'memcached_keys.yml')).symbolize_keys!
	
  def self.key(key, value)
    “#{KEY_HASH[key]}:#{value}”
  end

  def self.multi_key(key, value1, value2)
    “#{KEY_HASH[key]}:#{value1}:#{value2}”
  end

ritikesh

gem install memoize_until
> irb
irb:> require 'memoize_until'
irb:> MemoizeUntil.hour(:default) {
irb:> 	$redis.get("APP_CONFIGS")
irb:> }
irb:> # memoizes(until the end of the day) and returns the result of #PerformSomeComplexOperation

ritikesh

gem 'memoize_until'

ritikesh

class Middleware::CustomLogging
  def initialize(app)
    @app = app
  end

  def call(env)
    if debug_logging?
      Rails.logger.level = Logger::DEBUG
    end

ritikesh

irb(main):024:0> MemoizeUntil.const_get(:TYPE_FACTORY)[:day]
=> #<MemoizeUntil::Store:0x00007f8a61415be8 @_store={:flags_from_redis=>{18=>1}, :default=>{}}, @_kind=:day>

irb(main):025:0> MemoizeUntil.day(:default) { nil }
=> nil

irb(main):026:0> MemoizeUntil.const_get(:TYPE_FACTORY)[:day]
=> #<MemoizeUntil::Store:0x00007f8a61415be8 @_store={:flags_from_redis=>{18=>1}, :default=>{18=>#<MemoizeUntil::NullObject:0x00007f8a640226c8>}}, @_kind=:day>

ritikesh

Benchmarks	User	System	Total	Real
Rehearsal
Existing	2.600000	0.240000	2.840000	(2.833792)
New	1.190000	0.010000	1.200000	(1.206466)
Actual
Existing	2.140000	0.050000	2.190000	(2.194628)
New	0.830000	0.010000	0.840000	(0.835711)

ritikesh

class Tenant < ActiveRecord::Base
  ...
  # associations
  has_one :tenant_configs
  delegate :locale, :timezone, :date_format, ..., to: :tenant_configs
  ...
end

ritikesh

class Tenant < ActiveRecord::Base
  ...
  # associations
  has_one :tenant_configs
  delegate :locale, :timezone, :date_format, ..., to: :tenant_configs_from_cache
  
  def tenant_configs_from_cache
    Rails.cache.fetch(“tenant_configs:#{self.id}:#{self.tenant_configs.updated_at.to_i}”) { self.tenant_configs }
  end
  ...