Added memcache support for sessions.

lib/sessions/stores/memcache.js

@@ -0,0 +1,81 @@
+/*
+ * Geddy JavaScript Web development framework
+ * Copyright 2112 Matthew Eernisse (mde@fleegix.org)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+*/
+
+/*
+Config section should look like this:
+
+, sessions: {
+    store: 'memcache'
+  , servers: ['127.0.0.1:11211']
+  , key: 'sid'
+  , expiry: 14 * 24 * 60 * 60
+
+'servers' is your array of Memcache servers.
+*/
+
+var Memcached;
+
+try {
+  Memcached = require(process.cwd() + '/node_modules/memcached');
+}
+catch(e) {
+  throw new Error('The memcached module could not be found. Try doing "npm install memcached."');
+}
+
+var Memcache = function (callback) {
+  this.setup(callback);
+};
+
+Memcache.prototype = new (function () {
+  var _sessions = {};
+
+  this.setup = function (callback) {
+    memcached = new Memcached(geddy.config.sessions.servers);
+    memcached.on('failure', function (details) {
+      sys.error( "Server " + details.server + " went down due to: " +
+          details.messages.join(' '));
+    });
+    callback();
+  };
+
+  this.read = function (session, callback) {
+    var sid = session.id;
+    memcached.get(sid, function(err, result){
+      if (err) {
+        geddy.log.error(err);
+      }
+      callback(result || {});
+    });
+  };
+
+  this.write = function (session, callback) {
+    var sid = session.id
+      , data = session.data;
+    memcached.set(sid, data, 10000, function (err, result) {
+      if (err) {
+        geddy.log.error(err);
+      }
+      callback();
+    });
+  };
+
+})();
+
+exports.Memcache = Memcache;
+
+