Class: Rack::Session::Dalli
- Inherits:
-
Object
- Object
- Rack::Session::Dalli
- Defined in:
- lib/rack/session/dalli.rb
Constant Summary collapse
- DEFAULT_OPTIONS =
Abstract::ID::DEFAULT_OPTIONS.merge \ :namespace => 'rack:session', :memcache_server => 'localhost:11211'
Instance Attribute Summary collapse
-
#mutex ⇒ Object
readonly
Returns the value of attribute mutex.
-
#pool ⇒ Object
readonly
Returns the value of attribute pool.
Instance Method Summary collapse
- #delete_session(req, sid, options) ⇒ Object
- #destroy_session(env, session_id, options) ⇒ Object
- #find_session(req, sid) ⇒ Object
- #generate_sid ⇒ Object
- #get_session(env, sid) ⇒ Object
-
#initialize(app, options = {}) ⇒ Dalli
constructor
A new instance of Dalli.
- #set_session(env, session_id, new_session, options) ⇒ Object
- #with_lock(env, default = nil) ⇒ Object
- #write_session(req, sid, session, options) ⇒ Object
Constructor Details
#initialize(app, options = {}) ⇒ Dalli
Returns a new instance of Dalli.
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# File 'lib/rack/session/dalli.rb', line 13 def initialize(app, ={}) super @mutex = Mutex.new mserv = @default_options[:memcache_server] mopts = @default_options.reject{|k,v| !DEFAULT_OPTIONS.include? k } @pool = [:cache] || ::Dalli::Client.new(mserv, mopts) @pool.alive! end |
Instance Attribute Details
#mutex ⇒ Object (readonly)
Returns the value of attribute mutex.
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# File 'lib/rack/session/dalli.rb', line 7 def mutex @mutex end |
#pool ⇒ Object (readonly)
Returns the value of attribute pool.
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# File 'lib/rack/session/dalli.rb', line 7 def pool @pool end |
Instance Method Details
#delete_session(req, sid, options) ⇒ Object
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# File 'lib/rack/session/dalli.rb', line 31 def delete_session(req, sid, ) destroy_session req.env, sid, end |
#destroy_session(env, session_id, options) ⇒ Object
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# File 'lib/rack/session/dalli.rb', line 66 def destroy_session(env, session_id, ) with_lock(env) do @pool.delete(session_id) generate_sid unless [:drop] end end |
#find_session(req, sid) ⇒ Object
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# File 'lib/rack/session/dalli.rb', line 23 def find_session(req, sid) get_session req.env, sid end |
#generate_sid ⇒ Object
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# File 'lib/rack/session/dalli.rb', line 36 def generate_sid while true sid = super break sid unless @pool.get(sid) end end |
#get_session(env, sid) ⇒ Object
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# File 'lib/rack/session/dalli.rb', line 43 def get_session(env, sid) with_lock(env, [nil, {}]) do unless sid and !sid.empty? and session = @pool.get(sid) sid, session = generate_sid, {} unless @pool.add(sid, session) raise "Session collision on '#{sid.inspect}'" end end [sid, session] end end |
#set_session(env, session_id, new_session, options) ⇒ Object
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# File 'lib/rack/session/dalli.rb', line 55 def set_session(env, session_id, new_session, ) return false unless session_id expiry = [:expire_after] expiry = expiry.nil? ? 0 : expiry + 1 with_lock(env, false) do @pool.set session_id, new_session, expiry session_id end end |
#with_lock(env, default = nil) ⇒ Object
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# File 'lib/rack/session/dalli.rb', line 73 def with_lock(env, default=nil) @mutex.lock if env['rack.multithread'] yield rescue ::Dalli::DalliError, Errno::ECONNREFUSED raise if $!. =~ /undefined class/ if $VERBOSE warn "#{self} is unable to find memcached server." warn $!.inspect end default ensure @mutex.unlock if @mutex.locked? end |
#write_session(req, sid, session, options) ⇒ Object
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# File 'lib/rack/session/dalli.rb', line 27 def write_session(req, sid, session, ) set_session req.env, sid, session, end |