| // Copyright 2006 The Closure Library Authors. All Rights Reserved. |
| // |
| // 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. |
| |
| /** |
| * @fileoverview Creates a pool of XhrIo objects to use. This allows multiple |
| * XhrIo objects to be grouped together and requests will use next available |
| * XhrIo object. |
| * |
| */ |
| |
| goog.provide('goog.net.XhrIoPool'); |
| |
| goog.require('goog.net.XhrIo'); |
| goog.require('goog.structs.PriorityPool'); |
| |
| |
| |
| /** |
| * A pool of XhrIo objects. |
| * @param {goog.structs.Map=} opt_headers Map of default headers to add to every |
| * request. |
| * @param {number=} opt_minCount Minimum number of objects (Default: 1). |
| * @param {number=} opt_maxCount Maximum number of objects (Default: 10). |
| * @constructor |
| * @extends {goog.structs.PriorityPool} |
| */ |
| goog.net.XhrIoPool = function(opt_headers, opt_minCount, opt_maxCount) { |
| goog.structs.PriorityPool.call(this, opt_minCount, opt_maxCount); |
| |
| /** |
| * Map of default headers to add to every request. |
| * @type {goog.structs.Map|undefined} |
| * @private |
| */ |
| this.headers_ = opt_headers; |
| }; |
| goog.inherits(goog.net.XhrIoPool, goog.structs.PriorityPool); |
| |
| |
| /** |
| * Creates an instance of an XhrIo object to use in the pool. |
| * @return {!goog.net.XhrIo} The created object. |
| * @override |
| */ |
| goog.net.XhrIoPool.prototype.createObject = function() { |
| var xhrIo = new goog.net.XhrIo(); |
| var headers = this.headers_; |
| if (headers) { |
| headers.forEach(function(value, key) { |
| xhrIo.headers.set(key, value); |
| }); |
| } |
| return xhrIo; |
| }; |
| |
| |
| /** |
| * Determine if an object has become unusable and should not be used. |
| * @param {Object} obj The object to test. |
| * @return {boolean} Whether the object can be reused, which is true if the |
| * object is not disposed and not active. |
| * @override |
| */ |
| goog.net.XhrIoPool.prototype.objectCanBeReused = function(obj) { |
| // An active XhrIo object should never be used. |
| var xhr = /** @type {goog.net.XhrIo} */ (obj); |
| return !xhr.isDisposed() && !xhr.isActive(); |
| }; |