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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>JSDoc: Class: Messaging</title>
<script src="scripts/prettify/prettify.js"> </script>
<script src="scripts/prettify/lang-css.js"> </script>
<!--[if lt IE 9]>
<script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<link type="text/css" rel="stylesheet" href="styles/prettify-tomorrow.css">
<link type="text/css" rel="stylesheet" href="styles/jsdoc-default.css">
</head>
<body>
<div id="main">
<h1 class="page-title">Class: Messaging</h1>
<section>
<header>
<h2>
<span class="ancestors"><a href="ClearBlade.html">ClearBlade</a>.</span>
Messaging
</h2>
</header>
<article>
<div class="container-overview">
<dt>
<h4 class="name" id="Messaging"><span class="type-signature"></span>new Messaging<span class="signature">(options, callback)</span><span class="type-signature"></span></h4>
</dt>
<dd>
<div class="description">
Initializes the ClearBlade messaging object and connects to a server.
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>options</code></td>
<td class="type">
<span class="param-type">Object</span>
</td>
<td class="description last">This value contains the config object for connecting. A number of reasonable defaults are set for the option if none are set.
<p>
The connect options and their defaults are:
<p>{number} [timeout] sets the timeout for the websocket connection in case of failure. The default is 60</p>
<p>{Messaging Message} [willMessage] A message sent on a specified topic when the client disconnects without sending a disconnect packet. The default is none.</p>
<p>{Number} [keepAliveInterval] The server disconnects if there is no activity for this pierod of time. The default is 60.</p>
<p>{boolean} [cleanSession] The server will persist state of the session if true. Not avaliable in beta.</p>
<p>{boolean} [useSSL] The option to use SSL websockets. Default is false for now.</p>
<p>{object} [invocationContext] An object to wrap all the important variables needed for the onFalure and onSuccess functions. The default is empty.</p>
<p>{function} [onSuccess] A callback to operate on the result of a sucessful connect. In beta the default is just the invoking of the `callback` parameter with the data from the connection.</p>
<p>{function} [onFailure] A callback to operate on the result of an unsuccessful connect. In beta the default is just the invoking of the `callback` parameter with the data from the connection.</p>
<p>{Object} [hosts] An array of hosts to attempt to connect too. Sticks to the first one that works. The default is [ClearBlade.messagingURI].</p>
<p>{Object} [ports] An array of ports to try, it also sticks to thef first one that works. The default is [1337].</p>
</p></td>
</tr>
<tr>
<td class="name"><code>callback</code></td>
<td class="type">
<span class="param-type">function</span>
</td>
<td class="description last">Callback to be run upon either succeessful or
failed connection</td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="ClearBlade.js.html">ClearBlade.js</a>, <a href="ClearBlade.js.html#line1360">line 1360</a>
</li></ul></dd>
</dl>
<h5>Example</h5>
<p class="code-caption"> A standard connect</p>
<pre class="prettyprint"><code>var callback = function (data) {
console.log(data);
};
//A connect with a nonstandard timeout
var cb = ClearBlade.Messaging({"timeout":15}, callback);</code></pre>
</dd>
</div>
<h3 class="subsection-title">Methods</h3>
<dl>
<dt>
<h4 class="name" id="getMessageHistory"><span class="type-signature">(static) </span>getMessageHistory<span class="signature">(topic, startTime, count, callback)</span><span class="type-signature"></span></h4>
</dt>
<dd>
<div class="description">
Gets the message history from a ClearBlade Messaging topic.
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>topic</code></td>
<td class="type">
<span class="param-type">string</span>
</td>
<td class="description last">The topic from which to retrieve history</td>
</tr>
<tr>
<td class="name"><code>startTime</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last">The time from which the history retrieval begins</td>
</tr>
<tr>
<td class="name"><code>count</code></td>
<td class="type">
<span class="param-type">number</span>
</td>
<td class="description last">The number of messages to retrieve</td>
</tr>
<tr>
<td class="name"><code>callback</code></td>
<td class="type">
<span class="param-type">funtion</span>
</td>
<td class="description last">The function to be called upon execution of query -- called with a boolean error and the response</td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="ClearBlade.js.html">ClearBlade.js</a>, <a href="ClearBlade.js.html#line1439">line 1439</a>
</li></ul></dd>
</dl>
</dd>
<dt>
<h4 class="name" id="Disconnect"><span class="type-signature"></span>Disconnect<span class="signature">()</span><span class="type-signature"></span></h4>
</dt>
<dd>
<div class="description">
Disconnects from the server.
</div>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="ClearBlade.js.html">ClearBlade.js</a>, <a href="ClearBlade.js.html#line1552">line 1552</a>
</li></ul></dd>
</dl>
<h5>Example</h5>
<p class="code-caption"> How to publish </p>
<pre class="prettyprint"><code>var callback = function (data) {
console.log(data);
};
var cb = ClearBlade.Messaging({}, callback);
cb.Disconnect()//why leave so soon :(</code></pre>
</dd>
<dt>
<h4 class="name" id="Publish"><span class="type-signature"></span>Publish<span class="signature">(topic, payload)</span><span class="type-signature"></span></h4>
</dt>
<dd>
<div class="description">
Publishes to a topic.
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>topic</code></td>
<td class="type">
<span class="param-type">string</span>
</td>
<td class="description last">Is the topic path of the message to be published. This will be sent to all listeners on the topic. No default.</td>
</tr>
<tr>
<td class="name"><code>payload</code></td>
<td class="type">
<span class="param-type">string</span>
|
<span class="param-type">ArrayBuffer</span>
</td>
<td class="description last">The payload to be sent. Also no default.</td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="ClearBlade.js.html">ClearBlade.js</a>, <a href="ClearBlade.js.html#line1464">line 1464</a>
</li></ul></dd>
</dl>
<h5>Example</h5>
<p class="code-caption"> How to publish </p>
<pre class="prettyprint"><code>var callback = function (data) {
console.log(data);
};
var cb = ClearBlade.Messaging({}, callback);
cb.Publish("ClearBlade/is awesome!","Totally rules");
//Topics can include spaces and punctuation except "/"</code></pre>
</dd>
<dt>
<h4 class="name" id="Subscribe"><span class="type-signature"></span>Subscribe<span class="signature">(topic, options<span class="signature-attributes">opt</span>, messageCallback)</span><span class="type-signature"></span></h4>
</dt>
<dd>
<div class="description">
Subscribes to a topic
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Attributes</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>topic</code></td>
<td class="type">
<span class="param-type">string</span>
</td>
<td class="attributes">
</td>
<td class="description last">The topic to subscribe to. No default.</td>
</tr>
<tr>
<td class="name"><code>options</code></td>
<td class="type">
<span class="param-type">Object</span>
</td>
<td class="attributes">
<optional><br>
</td>
<td class="description last">The configuration object. Options:
<p>{Number} [qos] The quality of service specified within MQTT. The default is 0, or fire and forget.</p>
<p>{Object} [invocationContext] An object that contains variables and other data for the onSuccess and failure callbacks. The default is blank.</p>
<p>{function} [onSuccess] The callback invoked on a successful subscription. The default is nothing.</p>
<p>{function} [onFailure] The callback invoked on a failed subsciption. The default is nothing.</p>
<p>{Number} [timeout] The time to wait for a response from the server acknowleging the subscription.</p></td>
</tr>
<tr>
<td class="name"><code>messageCallback</code></td>
<td class="type">
<span class="param-type">function</span>
</td>
<td class="attributes">
</td>
<td class="description last">Callback to invoke upon message arrival</td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="ClearBlade.js.html">ClearBlade.js</a>, <a href="ClearBlade.js.html#line1485">line 1485</a>
</li></ul></dd>
</dl>
<h5>Example</h5>
<p class="code-caption"> How to publish </p>
<pre class="prettyprint"><code>var callback = function (data) {
console.log(data);
};
var cb = ClearBlade.Messaging({}, callback);
cb.Subscribe("ClearBlade/is awesome!",{});</code></pre>
</dd>
<dt>
<h4 class="name" id="Unsubscribe"><span class="type-signature"></span>Unsubscribe<span class="signature">(topic, options<span class="signature-attributes">opt</span>)</span><span class="type-signature"></span></h4>
</dt>
<dd>
<div class="description">
Unsubscribes from a topic
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Attributes</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>topic</code></td>
<td class="type">
<span class="param-type">string</span>
</td>
<td class="attributes">
</td>
<td class="description last">The topic to subscribe to. No default.</td>
</tr>
<tr>
<td class="name"><code>options</code></td>