Started on node.js+socket.io+mongoDB on the backend for more responsivnes

server/node_modules/mongodb/lib/server.js

@@ -0,0 +1,408 @@
+"use strict";
+
+var EventEmitter = require('events').EventEmitter
+  , inherits = require('util').inherits
+  , CServer = require('mongodb-core').Server
+  , Cursor = require('./cursor')
+  , f = require('util').format
+  , ServerCapabilities = require('./topology_base').ServerCapabilities
+  , Store = require('./topology_base').Store
+  , MongoError = require('mongodb-core').MongoError
+  , shallowClone = require('./utils').shallowClone;
+
+/**
+ * @fileOverview The **Server** class is a class that represents a single server topology and is
+ * used to construct connections.
+ *
+ * **Server Should not be used, use MongoClient.connect**
+ * @example
+ * var Db = require('mongodb').Db,
+ *   Server = require('mongodb').Server,
+ *   test = require('assert');
+ * // Connect using single Server
+ * var db = new Db('test', new Server('localhost', 27017););
+ * db.open(function(err, db) {
+ *   // Get an additional db
+ *   db.close();
+ * });
+ */
+
+/**
+ * Creates a new Server instance
+ * @class
+ * @deprecated
+ * @param {string} host The host for the server, can be either an IP4, IP6 or domain socket style host.
+ * @param {number} [port] The server port if IP4.
+ * @param {object} [options=null] Optional settings.
+ * @param {number} [options.poolSize=5] Number of connections in the connection pool for each server instance, set to 5 as default for legacy reasons.
+ * @param {boolean} [options.ssl=false] Use ssl connection (needs to have a mongod server with ssl support)
+ * @param {object} [options.sslValidate=true] Validate mongod server certificate against ca (needs to have a mongod server with ssl support, 2.4 or higher)
+ * @param {array} [options.sslCA=null] Array of valid certificates either as Buffers or Strings (needs to have a mongod server with ssl support, 2.4 or higher)
+ * @param {(Buffer|string)} [options.sslCert=null] String or buffer containing the certificate we wish to present (needs to have a mongod server with ssl support, 2.4 or higher)
+ * @param {(Buffer|string)} [options.sslKey=null] String or buffer containing the certificate private key we wish to present (needs to have a mongod server with ssl support, 2.4 or higher)
+ * @param {(Buffer|string)} [options.sslPass=null] String or buffer containing the certificate password (needs to have a mongod server with ssl support, 2.4 or higher)
+ * @param {object} [options.socketOptions=null] Socket options
+ * @param {boolean} [options.socketOptions.autoReconnect=false] Reconnect on error.
+ * @param {boolean} [options.socketOptions.noDelay=true] TCP Socket NoDelay option.
+ * @param {number} [options.socketOptions.keepAlive=0] TCP KeepAlive on the socket with a X ms delay before start.
+ * @param {number} [options.socketOptions.connectTimeoutMS=0] TCP Connection timeout setting
+ * @param {number} [options.socketOptions.socketTimeoutMS=0] TCP Socket timeout setting
+ * @param {number} [options.reconnectTries=30] Server attempt to reconnect #times
+ * @param {number} [options.reconnectInterval=1000] Server will wait # milliseconds between retries
+ * @fires Server#connect
+ * @fires Server#close
+ * @fires Server#error
+ * @fires Server#timeout
+ * @fires Server#parseError
+ * @fires Server#reconnect
+ * @return {Server} a Server instance.
+ */
+var Server = function(host, port, options) {
+  options = options || {};
+  if(!(this instanceof Server)) return new Server(host, port, options);
+  EventEmitter.call(this);
+  var self = this;
+
+  // Store option defaults
+  var storeOptions = {
+      force: false
+    , bufferMaxEntries: -1
+  }
+
+  // Shared global store
+  var store = options.store || new Store(self, storeOptions);
+
+  // Detect if we have a socket connection
+  if(host.indexOf('\/') != -1) {
+    if(port != null && typeof port == 'object') {
+      options = port;
+      port = null;
+    }
+  } else if(port == null) {
+    throw new MongoError('port must be specified');
+  }
+
+  // Clone options
+  var clonedOptions = shallowClone(options);
+  clonedOptions.host = host;
+  clonedOptions.port = port;
+
+  // Reconnect
+  var reconnect = typeof options.auto_reconnect == 'boolean' ? options.auto_reconnect : true;
+  reconnect = typeof options.autoReconnect == 'boolean' ? options.autoReconnect : reconnect;
+  var emitError = typeof options.emitError == 'boolean' ? options.emitError : true;
+  var poolSize = typeof options.poolSize == 'number' ? options.poolSize : 5;
+
+  // Socket options passed down
+  if(options.socketOptions) {
+    if(options.socketOptions.connectTimeoutMS) {
+      this.connectTimeoutMS = options.socketOptions.connectTimeoutMS;
+      clonedOptions.connectionTimeout = options.socketOptions.connectTimeoutMS;
+    }
+
+    if(options.socketOptions.socketTimeoutMS) {
+      clonedOptions.socketTimeout = options.socketOptions.socketTimeoutMS;
+    }
+
+    if(typeof options.socketOptions.keepAlive == 'number') {
+      clonedOptions.keepAliveInitialDelay = options.socketOptions.keepAlive;
+      clonedOptions.keepAlive = true;
+    }
+
+    if(typeof options.socketOptions.noDelay == 'boolean') {
+      clonedOptions.noDelay = options.socketOptions.noDelay;
+    }
+  }
+
+  // Add the cursor factory function
+  clonedOptions.cursorFactory = Cursor;
+  clonedOptions.reconnect = reconnect;
+  clonedOptions.emitError = emitError;
+  clonedOptions.size = poolSize;
+
+  // Translate the options
+  if(clonedOptions.sslCA) clonedOptions.ca = clonedOptions.sslCA;
+  if(typeof clonedOptions.sslValidate == 'boolean') clonedOptions.rejectUnauthorized = clonedOptions.sslValidate;
+  if(clonedOptions.sslKey) clonedOptions.key = clonedOptions.sslKey;
+  if(clonedOptions.sslCert) clonedOptions.cert = clonedOptions.sslCert;
+  if(clonedOptions.sslPass) clonedOptions.passphrase = clonedOptions.sslPass;
+
+  // Add the non connection store
+  clonedOptions.disconnectHandler = store;
+
+  // Create an instance of a server instance from mongodb-core
+  var server = new CServer(clonedOptions);
+  // Server capabilities
+  var sCapabilities = null;
+
+  // Define the internal properties
+  this.s = {
+    // Create an instance of a server instance from mongodb-core
+      server: server
+    // Server capabilities
+    , sCapabilities: null
+    // Cloned options
+    , clonedOptions: clonedOptions
+    // Reconnect
+    , reconnect: reconnect
+    // Emit error
+    , emitError: emitError
+    // Pool size
+    , poolSize: poolSize
+    // Store Options
+    , storeOptions: storeOptions
+    // Store
+    , store: store
+    // Host
+    , host: host
+    // Port
+    , port: port
+    // Options
+    , options: options
+  }
+
+  // BSON property
+  Object.defineProperty(this, 'bson', {
+    enumerable: true, get: function() {
+      return self.s.server.bson;
+    }
+  });
+
+  // Last ismaster
+  Object.defineProperty(this, 'isMasterDoc', {
+    enumerable:true, get: function() {
+      return self.s.server.lastIsMaster();
+    }
+  });
+
+  // Last ismaster
+  Object.defineProperty(this, 'poolSize', {
+    enumerable:true, get: function() { return self.s.server.connections().length; }
+  });
+
+  Object.defineProperty(this, 'autoReconnect', {
+    enumerable:true, get: function() { return self.s.reconnect; }
+  });
+
+  Object.defineProperty(this, 'host', {
+    enumerable:true, get: function() { return self.s.host; }
+  });
+
+  Object.defineProperty(this, 'port', {
+    enumerable:true, get: function() { return self.s.port; }
+  });
+}
+
+inherits(Server, EventEmitter);
+
+Server.prototype.parserType = function() {
+  return this.s.server.parserType();
+}
+
+// Connect
+Server.prototype.connect = function(db, _options, callback) {
+  var self = this;
+  if('function' === typeof _options) callback = _options, _options = {};
+  if(_options == null) _options = {};
+  if(!('function' === typeof callback)) callback = null;
+  self.s.options = _options;
+
+  // Update bufferMaxEntries
+  self.s.storeOptions.bufferMaxEntries = db.bufferMaxEntries;
+
+  // Error handler
+  var connectErrorHandler = function(event) {
+    return function(err) {
+      // Remove all event handlers
+      var events = ['timeout', 'error', 'close'];
+      events.forEach(function(e) {
+        self.s.server.removeListener(e, connectHandlers[e]);
+      });
+
+      self.s.server.removeListener('connect', connectErrorHandler);
+
+      // Try to callback
+      try {
+        callback(err);
+      } catch(err) {
+        process.nextTick(function() { throw err; })
+      }
+    }
+  }
+
+  // Actual handler
+  var errorHandler = function(event) {
+    return function(err) {
+      if(event != 'error') {
+        self.emit(event, err);
+      }
+    }
+  }
+
+  // Error handler
+  var reconnectHandler = function(err) {
+    self.emit('reconnect', self);
+    self.s.store.execute();
+  }
+
+  // Destroy called on topology, perform cleanup
+  var destroyHandler = function() {
+    self.s.store.flush();
+  }
+
+  // Connect handler
+  var connectHandler = function() {
+    // Clear out all the current handlers left over
+    ["timeout", "error", "close"].forEach(function(e) {
+      self.s.server.removeAllListeners(e);
+    });
+
+    // Set up listeners
+    self.s.server.once('timeout', errorHandler('timeout'));
+    self.s.server.once('error', errorHandler('error'));
+    self.s.server.once('close', errorHandler('close'));
+    // Only called on destroy
+    self.s.server.once('destroy', destroyHandler);
+
+    // Emit open event
+    self.emit('open', null, self);
+
+    // Return correctly
+    try {
+      callback(null, self);
+    } catch(err) {
+      process.nextTick(function() { throw err; })
+    }
+  }
+
+  // Set up listeners
+  var connectHandlers = {
+    timeout: connectErrorHandler('timeout'),
+    error: connectErrorHandler('error'),
+    close: connectErrorHandler('close')
+  };
+
+  // Add the event handlers
+  self.s.server.once('timeout', connectHandlers.timeout);
+  self.s.server.once('error', connectHandlers.error);
+  self.s.server.once('close', connectHandlers.close);
+  self.s.server.once('connect', connectHandler);
+  // Reconnect server
+  self.s.server.on('reconnect', reconnectHandler);
+
+  // Start connection
+  self.s.server.connect(_options);
+}
+
+// Server capabilities
+Server.prototype.capabilities = function() {
+  if(this.s.sCapabilities) return this.s.sCapabilities;
+  this.s.sCapabilities = new ServerCapabilities(this.s.server.lastIsMaster());
+  return this.s.sCapabilities;
+}
+
+// Command
+Server.prototype.command = function(ns, cmd, options, callback) {
+  this.s.server.command(ns, cmd, options, callback);
+}
+
+// Insert
+Server.prototype.insert = function(ns, ops, options, callback) {
+  this.s.server.insert(ns, ops, options, callback);
+}
+
+// Update
+Server.prototype.update = function(ns, ops, options, callback) {
+  this.s.server.update(ns, ops, options, callback);
+}
+
+// Remove
+Server.prototype.remove = function(ns, ops, options, callback) {
+  this.s.server.remove(ns, ops, options, callback);
+}
+
+// IsConnected
+Server.prototype.isConnected = function() {
+  return this.s.server.isConnected();
+}
+
+// Insert
+Server.prototype.cursor = function(ns, cmd, options) {
+  options.disconnectHandler = this.s.store;
+  return this.s.server.cursor(ns, cmd, options);
+}
+
+Server.prototype.setBSONParserType = function(type) {
+  return this.s.server.setBSONParserType(type);
+}
+
+Server.prototype.lastIsMaster = function() {
+  return this.s.server.lastIsMaster();
+}
+
+Server.prototype.close = function(forceClosed) {
+  this.s.server.destroy();
+  // We need to wash out all stored processes
+  if(forceClosed == true) {
+    this.s.storeOptions.force = forceClosed;
+    this.s.store.flush();
+  }
+}
+
+Server.prototype.auth = function() {
+  var args = Array.prototype.slice.call(arguments, 0);
+  this.s.server.auth.apply(this.s.server, args);
+}
+
+/**
+ * All raw connections
+ * @method
+ * @return {array}
+ */
+Server.prototype.connections = function() {
+  return this.s.server.connections();
+}
+
+/**
+ * Server connect event
+ *
+ * @event Server#connect
+ * @type {object}
+ */
+
+/**
+ * Server close event
+ *
+ * @event Server#close
+ * @type {object}
+ */
+
+/**
+ * Server reconnect event
+ *
+ * @event Server#reconnect
+ * @type {object}
+ */
+
+/**
+ * Server error event
+ *
+ * @event Server#error
+ * @type {MongoError}
+ */
+
+/**
+ * Server timeout event
+ *
+ * @event Server#timeout
+ * @type {object}
+ */
+
+/**
+ * Server parseError event
+ *
+ * @event Server#parseError
+ * @type {object}
+ */
+
+module.exports = Server;