Class: DataMapper::Session::Abstract::Store

Inherits:
Object
  • Object
show all
Defined in:
lib/rack_datamapper/session/abstract/store.rb

Instance Method Summary collapse

Constructor Details

#initialize(app, options, id_generator) ⇒ Store

Returns a new instance of Store.



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# File 'lib/rack_datamapper/session/abstract/store.rb', line 8

def initialize(app, options, id_generator)
  @mutex = Mutex.new
  if cache = options.delete(:cache)
    @@cache = if RUBY_PLATFORM =~ /java/
                begin
                  # to avoid memory leaks use a hashmap which clears
                  # itself on severe memory shortage
                  require 'softhashmap'
                  m = Java.SoftHashMap.new
                  def m.delete(key)
                    remove(key)
                  end
                  m
                rescue
                  # fallback to non java Hash
                  {}
                end
              else
                {}
              end
    @@semaphore = Mutex.new
  else
    @@cache = nil unless cache.nil? && self.class.class_variable_defined?(:@@cache)
  end
  @@session_class = options.delete(:session_class) || Session unless (self.class.class_variable_defined?(:@@session_class) and @@session_class)
  @id_generator = id_generator
end

Instance Method Details

#get_session(env, sid) ⇒ Object 



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# File 'lib/rack_datamapper/session/abstract/store.rb', line 36

def get_session(env, sid)
  @mutex.lock if env['rack.multithread']
  if sid
    session = 
      if @@cache
        @@cache[sid] || @@cache[sid] = @@session_class.get(sid)
      else
        @@session_class.get(sid)
      end
  end

  unless sid and session
    env['rack.errors'].puts("Session '#{sid.inspect}' not found, initializing...") if $VERBOSE and not sid.nil?
    sid = @id_generator.call
    session = @@session_class.create(:session_id => sid)
    @@cache[sid] = session if @@cache
  end
  #session.instance_variable_set('@old', {}.merge(session))

  return [sid, session.data]
ensure
  @mutex.unlock if env['rack.multithread']
end

#set_session(env, sid, session_data, options) ⇒ Object 



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# File 'lib/rack_datamapper/session/abstract/store.rb', line 60

def set_session(env, sid, session_data, options)
  @mutex.lock if env['rack.multithread']
  session = 
    if @@cache
      @@cache[sid] || @@cache[sid] = @@session_class.get(sid)
    else
      @@session_class.get(sid)
    end 
  return false if session.nil?
  if options[:renew] or options[:drop]
    @@cache.delete(sid) if @@cache
    session.destroy
    return false if options[:drop]
    sid = @id_generator.call
    session = @@session_class.create(:session_id => sid)
    @@cache[sid] = session if @@cache
  end
  #        old_session = new_session.instance_variable_get('@old') || {}
  #        session = merge_sessions session_id, old_session, new_session, session
  session.data = session_data
  if session_data.empty?
    @@cache.delete(sid) if @@cache
    session.destroy
    false
  elsif session.save
    session.session_id
  else
    false
  end
ensure
  @mutex.unlock if env['rack.multithread']
end