Class: Memcache

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

Overview

this file is part of manqod manqod is distributed under the CDDL licence the author of manqod is Dobai-Pataky Balint([email protected])

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(servers, options = {}) ⇒ Memcache

Returns a new instance of Memcache.



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# File 'lib/Memcache.rb', line 6

def initialize(servers,options={})
	@prefix_key=options[:prefix_key]
	@memcache_lib=nil
	@memcache=nil
	@version=nil
	begin
		@version=Memcached::VERSION
		einfo("using memcached(#{version})")
		@memcache_lib=:memcached
	rescue =>err
		begin
			@version=Dalli::VERSION
			einfo("falling back memcache to dalli(#{version})")
			@memcache_lib=:dalli
		rescue =>err
			eerror("No memcache lib available, Follow install instructions on http://manqod.sourceforge.net")
		end
	end

	case memcache_lib
		when :memcached
			options[:default_ttl] = 0
			options[:timeout] = 30
			@memcache = Memcached.new(servers,options)
		when :dalli
			options.delete(:prefix_key)
			options[:expires_in]=0
			@memcache = Dalli::Client.new(servers,options)
		else
			eeror("No memcache lib available")
	end
end

Instance Attribute Details

#memcache ⇒ Object (readonly)

Returns the value of attribute memcache.



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# File 'lib/Memcache.rb', line 38

def memcache
  @memcache
end

#memcache_lib ⇒ Object (readonly)

Returns the value of attribute memcache_lib.



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# File 'lib/Memcache.rb', line 38

def memcache_lib
  @memcache_lib
end

#version ⇒ Object (readonly)

Returns the value of attribute version.



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# File 'lib/Memcache.rb', line 38

def version
  @version
end

Instance Method Details

#get(key) ⇒ Object 



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# File 'lib/Memcache.rb', line 40

def get(key)
	case memcache_lib
		when :memcached
			begin
				return memcache.get(key)
			rescue Memcached::NotFound
				ewarn("cannot load data for key:#{key.inspect}")
				return nil
			end
		when :dalli
			if key.class.name == "Array"
				values=Hash.new
				key.each{|k| values[k]=dalli_get_one(k)}
				return values
			else
				dalli_get_one(key)
			end
	end
end

#to_s ⇒ Object 



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# File 'lib/Memcache.rb', line 61

def to_s
	"Memcache(#{memcache_lib}-#{version})[#{@prefix_key}]"
end