Class: Lawnchair::StorageEngine::Abstract

Inherits:
Object
  • Object
show all
Defined in:
lib/storage_engine/abstract.rb

Direct Known Subclasses

InProcess, Redis

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.data_store ⇒ Object (readonly)

Returns the value of attribute data_store.



5
6
7
 
# File 'lib/storage_engine/abstract.rb', line 5

def data_store
  @data_store
end

Class Method Details

.computed_key(key) ⇒ Object 



34
35
36
37
38
39
 
# File 'lib/storage_engine/abstract.rb', line 34

def computed_key(key)
  raise "Missing key" if key.nil? || key.empty?
  key.gsub!(" ","") if key.match(/\s/)
  prefix = "Lawnchair"
  "#{prefix}:#{key}"
end

.db_connection? ⇒ Boolean

Returns:

  • (Boolean) 


41
42
43
 
# File 'lib/storage_engine/abstract.rb', line 41

def db_connection?
  true
end

.fetch(key, options = {}, &block) ⇒ Object 



11
12
13
14
15
16
17
18
19
20
21
22
23
24
 
# File 'lib/storage_engine/abstract.rb', line 11

def fetch(key, options={}, &block)
            
  start_time = Time.now
  if exists?(key)
    value = get(key, options)
    log("HIT", key, Time.now-start_time)
    return value
  else
    value = block.call
    set(key, value, options)
    log("MISS", key, Time.now-start_time)
    return value
  end
end

.get(key, options = {}) ⇒ Object 



26
27
28
29
30
31
32
 
# File 'lib/storage_engine/abstract.rb', line 26

def get(key, options={})
  if options[:raw]
    data_store[computed_key(key)]
  else
    exists?(key) ? Marshal.load(data_store[computed_key(key)]) : nil
  end
end

.log(message, key, elapsed) ⇒ Object 



45
46
47
 
# File 'lib/storage_engine/abstract.rb', line 45

def log(message, key, elapsed)
  ActionController::Base.logger.info("Lawnchair Cache: #{message} (%0.6f secs): #{key}" % elapsed) if defined? ::ActionController::Base
end