Class: AsyncCache

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
app/models/async_cache.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ AsyncCache

Returns a new instance of AsyncCache.



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# File 'app/models/async_cache.rb', line 4

def initialize
  @@counter = 0
  @@chunks = []
end

Instance Method Details

#build ⇒ Object 



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# File 'app/models/async_cache.rb', line 18

def build
  @@chunks.each {|chunk| chunk.call }
end

#counter ⇒ Object 



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# File 'app/models/async_cache.rb', line 14

def counter
  @@counter
end

#read(tag) ⇒ Object

since the async controller read request happens immediately on pages that use the ‘asynchronously do` block, the AsyncCache#read method has to block until the file it’s looking for exists.



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# File 'app/models/async_cache.rb', line 25

def read(tag)
  @content = nil
  begin
    status = Timeout.timeout(10) do 
      until File.exists?(path(tag))
        sleep 0.2
      end
      @content = File.read(path(tag))
    end
  rescue Timeout::Error
    Rails.logger.error("\e[31mTimeout Error in AsyncCache\e[0m")
    @content = ""
  end

  @content
end

#schedule(&block) ⇒ Object 



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# File 'app/models/async_cache.rb', line 9

def schedule(&block)
  @@counter += 1
  @@chunks << block
end

#write(tag, content) ⇒ Object 



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# File 'app/models/async_cache.rb', line 42

def write(tag, content)
  if !File.exists?(parent)
    setup
  end

  File.open(path(tag), 'w') do |f|
    f.write(content)
  end
end