Class: Rack::Sparklines::Cachers::Memory

Inherits:
Abstract
  • Object
show all
Defined in:
lib/rack-sparklines/cachers/memory.rb

Overview

Reads sparkline data from CSV files. Only the first line of numbers are read. Requests for “/sparks/stats.csv” will pass a data_path of “stats.csv”

Instance Attribute Summary collapse

Attributes inherited from Abstract

#png_path

Instance Method Summary collapse

Methods inherited from Abstract

#create_sparklines, #set

Constructor Details

#initialize(cache_time = 86400) ⇒ Memory

Returns a new instance of Memory.



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# File 'lib/rack-sparklines/cachers/memory.rb', line 11

def initialize(cache_time = 86400)
  @cache_time = cache_time
  super()
end

Instance Attribute Details

#cache_time ⇒ Object

Returns the value of attribute cache_time.



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# File 'lib/rack-sparklines/cachers/memory.rb', line 9

def cache_time
  @cache_time
end

#sparklines ⇒ Object

Returns the value of attribute sparklines.



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# File 'lib/rack-sparklines/cachers/memory.rb', line 9

def sparklines
  @sparklines
end

Instance Method Details

#exists? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rack-sparklines/cachers/memory.rb', line 20

def exists?
  @sparklines
end

#save(data, options) ⇒ Object 



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# File 'lib/rack-sparklines/cachers/memory.rb', line 28

def save(data, options)
  @sparklines = create_sparklines(data, options)
end

#serve(app, headers = {}) ⇒ Object 



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# File 'lib/rack-sparklines/cachers/memory.rb', line 36

def serve(app, headers = {})
  headers['Cache-Control'] = "public, max-age=#{@cache_time}"
  super(app, headers)
end

#size ⇒ Object 



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# File 'lib/rack-sparklines/cachers/memory.rb', line 16

def size
  @sparklines ? @sparklines.size : 0
end

#stream {|@sparklines| ... } ⇒ Object

Yields:



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# File 'lib/rack-sparklines/cachers/memory.rb', line 32

def stream
  yield @sparklines
end

#updated_at ⇒ Object 



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# File 'lib/rack-sparklines/cachers/memory.rb', line 24

def updated_at
  Time.now.utc
end