Padrino::Cache::Store::Memory

Initialize Memory Store with memory size

@param [Integer] size

Size of memory cache

@example

Padrino.cache = Padrino::Cache::Store::Memory.new(10000)
# or from your app
set :cache, Padrino::Cache::Store::Memory.new(10000)

@api public

# File lib/padrino-cache/store/memory.rb, line 20
def initialize(size = 5000, options={})
  @size, @entries, @index = size, [], {}
  super(options)
end

Delete the value for a given key

@param [String] key

cache key

@example

# with: MyApp.cache.set('records', records)
MyApp.cache.delete('records')

@api public

# File lib/padrino-cache/store/memory.rb, line 84
def delete(key)
  @index.delete(key)
end

Reinitialize your cache

@example

# with: MyApp.cache.set('records', records)
MyApp.cache.flush
MyApp.cache.get('records') # => nil

@api public

# File lib/padrino-cache/store/memory.rb, line 97
def flush
  @index = Hash.new
end

Return the a value for the given key

@param [String] key

cache key to retrieve value

@example

# with MyApp.cache.set('records', records)
MyApp.cache.get('records')

@api public

# File lib/padrino-cache/store/memory.rb, line 36
def get(key)
  if @index.key?(key) and value = @index[key]
    expiry, body = value
    if now_before? expiry
      body
    else
      delete(key)
      nil
    end
  else
    nil
  end
end

Set the value for a given key and optionally with an expire time. Default expiry is 86400.

@param [String] key

cache key

@param value

value of cache key

@example

MyApp.cache.set('records', records)
MyApp.cache.set('records', records, :expires_in => 30) # => 30 seconds

@api public

# File lib/padrino-cache/store/memory.rb, line 64
def set(key, value, opts = nil)
  delete(key)
  @entries.push(key)
  @index[key] = [get_expiry(opts), value]
  while @entries.size > @size
    delete(@entries.shift)
  end
end