CatchCache

An easy way to manage caching and flushing of Ruby objects. Especially useful when you are speeding a very slow API or page.

Installation

Add this line to your application's Gemfile:

gem 'catch_cache'

And then execute:

$ bundle

Or install it yourself as:

$ gem install catch_cache

Usage

To cache objects

class ServiceWithAVerySlowQuery
  include CatchCache::Cache

  def query
    lead = get_some_lead
    catch_then_cache("lead_timeline_logs_#{lead.id}") do
      # Your very slow query which
      # returns a bunch of Ruby objects
    end
  end
end

:flush_cache!

In your AR model:

class LoanApplication < ActiveRecord::Base
  include CatchCache::Flush

  belongs_to :lead

  # Everytime the :after_commit AR callback is called,
  # the Redis cache with id "lead_timeline_logs_#{lead.id}"
  # is going to be flushed

  cache_id :lead_timeline_logs, after_commit: -> { flush_cache!: -> { lead.id } }
end

:flush_all!

Use :flush_all to clear the cache for all the keys with the suffix defined in cache_id

In your AR model:

class AdminUser < ActiveRecord::Base
  include CatchCache::Flush

  # Everytime the :after_commit AR callback is called,
  # all the Redis caches with suffix "lead_timeline_logs"
  # are going to be flushed

  cache_id :lead_timeline_logs, after_commit: :flush_all!
end

License

The gem is available as open source under the terms of the MIT License.

catch_cache

Development