integration
Version:
Enterprise integration patterns for JavaScript
85 lines (73 loc) • 2.53 kB
JavaScript
/*
* Copyright (c) 2012 VMware, Inc. All Rights Reserved.
*
* 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.
*/
(function (define) {
'use strict';
/**
* Pollable dispatcher
*
* @author Scott Andrews
*/
define(function (/* require */) {
/**
* Store messages to be consumed later
*
* @param {Queue} queue the queuing strategy for this dispatcher. The
* queue must support 'push' and 'shift' for adding and removing
* message from the queue respectively. Queues may or may not be
* durable. The default queue is an Array.
*/
function pollableDispatcher(queue) {
var dispatcher = {};
queue = queue || [];
/**
* @returns {Message} the next message, may return undefined if no
* messages are available
*/
function receive() {
return queue.shift();
}
/**
* Enqueue a message to be consumed later
*
* @param {Message} message the message to queue
* @param {Function} handlerResolver handler resolver
* @returns {boolean} true if enqueueing is successful
*/
dispatcher.dispatch = function dispatch(message /*, handlerResolver */) {
try {
return !!queue.push(message);
}
catch (e) {
return false;
}
};
dispatcher.channelMixins = {
receive: receive
};
return dispatcher;
}
return pollableDispatcher;
});
}(
typeof define === 'function' && define.amd ? define : function (factory) { module.exports = factory(require); }
// Boilerplate for AMD and Node
));