Class: ActiveSupport::Cache::Entry

Inherits:

Object

• Object
• ActiveSupport::Cache::Entry

show all

Defined in:

activesupport/lib/active_support/cache.rb

Overview

Constant Summary

DEFAULT_COMPRESS_LIMIT =

16.kilobytes

Instance Attribute Summary (collapse)

• - (Object) created_at readonly

  Returns the value of attribute created_at.

• - (Object) expires_in readonly

  Returns the value of attribute expires_in.

Class Method Summary (collapse)

• + (Object) create(raw_value, created_at, options = {})

  Create an entry with internal attributes set.

Instance Method Summary (collapse)

• - (Boolean) compressed?
• - (Boolean) expired?

  Check if the entry is expired.

• - (Object) expires_at

  Seconds since the epoch when the entry will expire.

• - (Object) expires_at=(time)

  Set a new time when the entry will expire.

• - (Entry) initialize(value, options = {}) constructor

  Create a new cache entry for the specified value.

• - (Object) raw_value

  Get the raw value.

• - (Object) size

  Returns the size of the cached value.

• - (Object) value

  Get the value stored in the cache.

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# File 'activesupport/lib/active_support/cache.rb', line 553

def initialize(value, options = {})
  @compressed = false
  @expires_in = options[:expires_in]
  @expires_in = @expires_in.to_f if @expires_in
  @created_at = Time.now.to_f
  if value
    if should_compress?(value, options)
      @value = Zlib::Deflate.deflate(Marshal.dump(value))
      @compressed = true
    else
      @value = value
    end
  else
    @value = nil
  end
end

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# File 'activesupport/lib/active_support/cache.rb', line 533

def created_at
  @created_at
end

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# File 'activesupport/lib/active_support/cache.rb', line 533

def expires_in
  @expires_in
end

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# File 'activesupport/lib/active_support/cache.rb', line 541

def create (raw_value, created_at, options = {})
  entry = new(nil)
  entry.instance_variable_set(:@value, raw_value)
  entry.instance_variable_set(:@created_at, created_at.to_f)
  entry.instance_variable_set(:@compressed, !!options[:compressed])
  entry.instance_variable_set(:@expires_in, options[:expires_in])
  entry
end

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# File 'activesupport/lib/active_support/cache.rb', line 586

def compressed?
  @compressed
end

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# File 'activesupport/lib/active_support/cache.rb', line 592

def expired?
  @expires_in && @created_at + @expires_in <= Time.now.to_f
end

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# File 'activesupport/lib/active_support/cache.rb', line 606

def expires_at
  @expires_in ? @created_at + @expires_in : nil
end

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# File 'activesupport/lib/active_support/cache.rb', line 597

def expires_at=(time)
  if time
    @expires_in = time.to_f - @created_at
  else
    @expires_in = nil
  end
end

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# File 'activesupport/lib/active_support/cache.rb', line 571

def raw_value
  @value
end

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# File 'activesupport/lib/active_support/cache.rb', line 612

def size
  if @value.nil?
    0
  elsif @value.respond_to?(:bytesize)
    @value.bytesize
  else
    Marshal.dump(@value).bytesize
  end
end

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# File 'activesupport/lib/active_support/cache.rb', line 576

def value
  if @value
    val = compressed? ? Marshal.load(Zlib::Inflate.inflate(@value)) : @value
    unless val.frozen?
      val.freeze rescue nil
    end
    val
  end
end