Class: ActiveSupport::Cache::LibmemcachedLocalStore

Inherits:
LibmemcachedStore show all
Includes:
Strategy::LocalCache
Defined in:
lib/active_support/cache/libmemcached_local_store.rb

Constant Summary

Constants inherited from LibmemcachedStore

ActiveSupport::Cache::LibmemcachedStore::DEFAULT_CLIENT_OPTIONS, ActiveSupport::Cache::LibmemcachedStore::DEFAULT_COMPRESS_THRESHOLD, ActiveSupport::Cache::LibmemcachedStore::ESCAPE_KEY_CHARS, ActiveSupport::Cache::LibmemcachedStore::FLAG_COMPRESSED

Instance Attribute Summary

Attributes inherited from LibmemcachedStore

#addresses, #options, #silence

Instance Method Summary collapse

Methods inherited from LibmemcachedStore

#clear, #delete, #exist?, #fetch, #initialize, #mute, #silence!, #stats, #write

Constructor Details

This class inherits a constructor from ActiveSupport::Cache::LibmemcachedStore

Instance Method Details

#decrement(key, amount = 1, options = {}) ⇒ Object

memcached returns a fixnum on decrement, but the value that is stored is raw / a string



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# File 'lib/active_support/cache/libmemcached_local_store.rb', line 74

def decrement(key, amount = 1, options={})
  result = super
  if result && (cache = local_cache)
    cache.write(key, result.to_s)
  end
  result
end

#increment(key, amount = 1, options = {}) ⇒ Object

memcached returns a fixnum on increment, but the value that is stored is raw / a string



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# File 'lib/active_support/cache/libmemcached_local_store.rb', line 65

def increment(key, amount = 1, options={})
  result = super
  if result && (cache = local_cache)
    cache.write(key, result.to_s)
  end
  result
end

#read(*args) ⇒ Object

if we read from local_cache then the return value from read_entry will be an Entry, so convert it to it’s value



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# File 'lib/active_support/cache/libmemcached_local_store.rb', line 30

def read(*args)
  result = super
  result = result.value if result.is_a?(ActiveSupport::Cache::Entry)
  result
end

#read_multi(*names) ⇒ Object

make read multi hit local cache



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# File 'lib/active_support/cache/libmemcached_local_store.rb', line 37

def read_multi(*names)
  return super unless cache = local_cache

  options = names.extract_options!

  missing_names = []

  # We write raw values to the local cache, unlike rails MemcachedStore, so we cannot use local_cache.read_multi.
  # Once read_multi_entry is available we can switch to that.
  results = names.each_with_object({}) do |name, results|
    value = local_cache.fetch_entry(name) do
      missing_names << name
      nil
    end
    results[name] = value unless value.nil?
  end

  if missing_names.any?
    missing_names << options
    missing = super(*missing_names)
    missing.each { |k,v| cache.write_entry(k, v, nil) }
    results.merge!(missing)
  end

  results
end