--- /dev/null
+require 'mysql'
+
+# allow access to the real Mysql connection
+class ActiveRecord::ConnectionAdapters::MysqlAdapter
+ attr_reader :connection
+end
+
+# MysqlSession is a down to the bare metal session store
+# implementation to be used with +SQLSessionStore+. It is much faster
+# than the default ActiveRecord implementation.
+#
+# The implementation assumes that the table column names are 'id',
+# 'data', 'created_at' and 'updated_at'. If you want use other names,
+# you will need to change the SQL statments in the code.
+
+class MysqlSession
+
+ # if you need Rails components, and you have a pages which create
+ # new sessions, and embed components insides this pages that need
+ # session access, then you *must* set +eager_session_creation+ to
+ # true (as of Rails 1.0).
+ cattr_accessor :eager_session_creation
+ @@eager_session_creation = false
+
+ attr_accessor :id, :session_id, :data
+
+ def initialize(session_id, data)
+ @session_id = session_id
+ @data = data
+ @id = nil
+ end
+
+ class << self
+
+ # retrieve the session table connection and get the 'raw' Mysql connection from it
+ def session_connection
+ SqlSession.connection.connection
+ end
+
+ # try to find a session with a given +session_id+. returns nil if
+ # no such session exists. note that we don't retrieve
+ # +created_at+ and +updated_at+ as they are not accessed anywhyere
+ # outside this class
+ def find_session(session_id)
+ connection = session_connection
+ connection.query_with_result = true
+ session_id = Mysql::quote(session_id)
+ result = connection.query("SELECT id, data FROM sessions WHERE `session_id`='#{session_id}' LIMIT 1")
+ my_session = nil
+ # each is used below, as other methods barf on my 64bit linux machine
+ # I suspect this to be a bug in mysql-ruby
+ result.each do |row|
+ my_session = new(session_id, row[1])
+ my_session.id = row[0]
+ end
+ result.free
+ my_session
+ end
+
+ # create a new session with given +session_id+ and +data+
+ # and save it immediately to the database
+ def create_session(session_id, data)
+ session_id = Mysql::quote(session_id)
+ new_session = new(session_id, data)
+ if @@eager_session_creation
+ connection = session_connection
+ connection.query("INSERT INTO sessions (`created_at`, `updated_at`, `session_id`, `data`) VALUES (NOW(), NOW(), '#{session_id}', '#{Mysql::quote(data)}')")
+ new_session.id = connection.insert_id
+ end
+ new_session
+ end
+
+ # delete all sessions meeting a given +condition+. it is the
+ # caller's responsibility to pass a valid sql condition
+ def delete_all(condition=nil)
+ if condition
+ session_connection.query("DELETE FROM sessions WHERE #{condition}")
+ else
+ session_connection.query("DELETE FROM sessions")
+ end
+ end
+
+ end # class methods
+
+ # update session with given +data+.
+ # unlike the default implementation using ActiveRecord, updating of
+ # column `updated_at` will be done by the datbase itself
+ def update_session(data)
+ connection = self.class.session_connection
+ if @id
+ # if @id is not nil, this is a session already stored in the database
+ # update the relevant field using @id as key
+ connection.query("UPDATE sessions SET `updated_at`=NOW(), `data`='#{Mysql::quote(data)}' WHERE id=#{@id}")
+ else
+ # if @id is nil, we need to create a new session in the database
+ # and set @id to the primary key of the inserted record
+ connection.query("INSERT INTO sessions (`created_at`, `updated_at`, `session_id`, `data`) VALUES (NOW(), NOW(), '#{@session_id}', '#{Mysql::quote(data)}')")
+ @id = connection.insert_id
+ end
+ end
+
+ # destroy the current session
+ def destroy
+ self.class.delete_all("session_id='#{session_id}'")
+ end
+
+end
+
+__END__
+
+# This software is released under the MIT license
+#
+# Copyright (c) 2005-2008 Stefan Kaes
+
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
projects / rails.git / blobdiff