Class: Jerakia::Cache

Inherits:
Object
  • Object
show all
Defined in:
lib/jerakia/cache.rb

Overview

Very primitive form of cache - but we’ll make this smarter

Defined Under Namespace

Classes: Entry, File

Class Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Cache

Returns a new instance of Cache.



12
13
 
# File 'lib/jerakia/cache.rb', line 12

def initialize
end

Class Attribute Details

.bucket ⇒ Object (readonly)

Returns the value of attribute bucket.



9
10
11
 
# File 'lib/jerakia/cache.rb', line 9

def bucket
  @bucket
end

Class Method Details

.add(index, data, metadata = {}) ⇒ Object 



19
20
21
22
23
24
25
26
27
 
# File 'lib/jerakia/cache.rb', line 19

def self.add(index, data, metadata={})
  @bucket[index] ||= {}
  ## The cache bucket is a global class object, therefore we should
  ## always store a copy of the data object, not the actual object
  ## to ensure that it is not referenced and tainted by the lookup
  #
  set_metadata(index, metadata)
  @bucket[index][:content] = Marshal.load(Marshal.dump(data))
end

.get(index) ⇒ Object 



65
66
67
68
 
# File 'lib/jerakia/cache.rb', line 65

def self.get(index)
  data = @bucket[index][:content]
  Marshal.load(Marshal.dump(data))
end

.in_bucket?(index) ⇒ Boolean

Returns:

  • (Boolean) 


44
45
46
 
# File 'lib/jerakia/cache.rb', line 44

def self.in_bucket?(index)
  bucket.has_key?(index)
end

.metadata(index) ⇒ Object 



33
34
35
36
37
 
# File 'lib/jerakia/cache.rb', line 33

def self.metadata(index)
  if in_bucket?(index)
    Marshal.load(Marshal.dump(@bucket[index][:metadata]))
  end
end

.purge(index) ⇒ Object 



57
58
59
 
# File 'lib/jerakia/cache.rb', line 57

def self.purge(index)
  @bucket.delete(index)
end

.set_metadata(index, metadata) ⇒ Object 



29
30
31
 
# File 'lib/jerakia/cache.rb', line 29

def self.set_metadata(index, metadata)
  @bucket[index][:metadata] = Marshal.load(Marshal.dump(metadata))
end

Instance Method Details

#add(index, data, metadata = {}) ⇒ Object 



15
16
17
 
# File 'lib/jerakia/cache.rb', line 15

def add(index, data, metadata={})
  self.class.add(index,data, metadata)
end

#bucket ⇒ Object 



70
71
72
 
# File 'lib/jerakia/cache.rb', line 70

def bucket
  self.class.bucket
end

#get(index) ⇒ Object 



61
62
63
 
# File 'lib/jerakia/cache.rb', line 61

def get(index)
  self.class.get(index)
end

#in_bucket?(index) ⇒ Boolean

Returns:

  • (Boolean) 


40
41
42
 
# File 'lib/jerakia/cache.rb', line 40

def in_bucket?(index)
  self.class.in_bucket?(index)
end

#purge(index) ⇒ Object 



53
54
55
 
# File 'lib/jerakia/cache.rb', line 53

def purge(index)
  self.class.purge(index)
end

#valid?(index) ⇒ Boolean

default behaviour is always validate if exists.

Returns:

  • (Boolean) 


49
50
51
 
# File 'lib/jerakia/cache.rb', line 49

def valid?(index)
  in_bucket?(index)
end