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rabbitmq-transport.html
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<!DOCTYPE html>
<html>
<head>
<title>rabbitmq-transport.js</title>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<meta name="viewport" content="width=device-width, target-densitydpi=160dpi, initial-scale=1.0; maximum-scale=1.0; user-scalable=0;">
<link rel="stylesheet" media="all" href="docco.css" />
</head>
<body>
<div id="container">
<div id="background"></div>
<ul class="sections">
<li id="title">
<div class="annotation">
<h1>rabbitmq-transport.js</h1>
</div>
</li>
<li id="section-1">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-1">¶</a>
</div>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-comment">/* Copyright (c) 2014 Richard Rodger, MIT License */</span>
<span class="hljs-meta">'use strict'</span>
<span class="hljs-keyword">var</span> _ = <span class="hljs-built_in">require</span>(<span class="hljs-string">'underscore'</span>)
<span class="hljs-keyword">var</span> amqp = <span class="hljs-built_in">require</span>(<span class="hljs-string">'amqplib/callback_api'</span>)
<span class="hljs-built_in">module</span>.exports = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">options</span>) </span>{
<span class="hljs-keyword">var</span> seneca = <span class="hljs-keyword">this</span>
<span class="hljs-keyword">var</span> plugin = <span class="hljs-string">'rabbitmq-transport'</span>
<span class="hljs-keyword">var</span> so = seneca.options()
options = seneca.util.deepextend(
{
rabbitmq: {
timeout: so.timeout ? so.timeout - <span class="hljs-number">555</span> : <span class="hljs-number">22222</span>,
type: <span class="hljs-string">'rabbitmq'</span>,
host: <span class="hljs-string">'localhost'</span>,
port: <span class="hljs-number">5672</span>
}
},
so.transport,
options)
<span class="hljs-keyword">var</span> tu = seneca.export(<span class="hljs-string">'transport/utils'</span>)
seneca.add({role: <span class="hljs-string">'transport'</span>, hook: <span class="hljs-string">'listen'</span>, type: <span class="hljs-string">'rabbitmq'</span>}, hook_listen_rabbitmq)
seneca.add({role: <span class="hljs-string">'transport'</span>, hook: <span class="hljs-string">'client'</span>, type: <span class="hljs-string">'rabbitmq'</span>}, hook_client_rabbitmq)
<span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">hook_listen_rabbitmq</span> (<span class="hljs-params">args, done</span>) </span>{
<span class="hljs-keyword">var</span> seneca = <span class="hljs-keyword">this</span>
<span class="hljs-keyword">var</span> type = args.type
<span class="hljs-keyword">var</span> listen_options = seneca.util.clean(_.extend({}, options[type], args))
amqp.connect(<span class="hljs-string">'amqp://'</span> + options.rabbitmq.host, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">error, connection</span>) </span>{
<span class="hljs-keyword">if</span> (error) <span class="hljs-keyword">return</span> done(error)
connection.createChannel(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">error, channel</span>) </span>{
<span class="hljs-keyword">if</span> (error) <span class="hljs-keyword">return</span> done(error)
channel.on(<span class="hljs-string">'error'</span>, done)
tu.listen_topics(seneca, args, listen_options, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">topic</span>) </span>{
<span class="hljs-keyword">var</span> acttopic = topic + <span class="hljs-string">'_act'</span>
<span class="hljs-keyword">var</span> restopic = topic + <span class="hljs-string">'_res'</span>
seneca.log.debug(<span class="hljs-string">'listen'</span>, <span class="hljs-string">'subscribe'</span>, acttopic, listen_options, seneca)
channel.assertQueue(acttopic)
channel.assertQueue(restopic)</pre></div></div>
</li>
<li id="section-2">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-2">¶</a>
</div>
<p>Subscribe</p>
</div>
<div class="content"><div class='highlight'><pre> channel.consume(acttopic, on_message)
<span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">on_message</span> (<span class="hljs-params">message</span>) </span>{
<span class="hljs-keyword">var</span> content = message.content ? message.content.toString() : <span class="hljs-literal">undefined</span>
<span class="hljs-keyword">var</span> data = tu.parseJSON(seneca, <span class="hljs-string">'listen-'</span> + type, content)
channel.ack(message)</pre></div></div>
</li>
<li id="section-3">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-3">¶</a>
</div>
<p>Publish</p>
</div>
<div class="content"><div class='highlight'><pre> tu.handle_request(seneca, data, listen_options, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">out</span>) </span>{
<span class="hljs-keyword">if</span> (out == <span class="hljs-literal">null</span>) <span class="hljs-keyword">return</span>
<span class="hljs-keyword">var</span> outstr = tu.stringifyJSON(seneca, <span class="hljs-string">'listen-'</span> + type, out)
channel.sendToQueue(restopic, <span class="hljs-keyword">new</span> Buffer(outstr))
})
}
})
seneca.add(<span class="hljs-string">'role:seneca,cmd:close'</span>, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">close_args, done</span>) </span>{
<span class="hljs-keyword">var</span> closer = <span class="hljs-keyword">this</span>
channel.close()
connection.close()
closer.prior(close_args, done)
})
seneca.log.info(<span class="hljs-string">'listen'</span>, <span class="hljs-string">'open'</span>, listen_options, seneca)
done()
})
})
}
<span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">hook_client_rabbitmq</span> (<span class="hljs-params">args, client_done</span>) </span>{
<span class="hljs-keyword">var</span> seneca = <span class="hljs-keyword">this</span>
<span class="hljs-keyword">var</span> type = args.type
<span class="hljs-keyword">var</span> client_options = seneca.util.clean(_.extend({}, options[type], args))
amqp.connect(<span class="hljs-string">'amqp://'</span> + options.rabbitmq.host, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">error, connection</span>) </span>{
<span class="hljs-keyword">if</span> (error) <span class="hljs-keyword">return</span> client_done(error)
connection.createChannel(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">error, channel</span>) </span>{
<span class="hljs-keyword">if</span> (error) <span class="hljs-keyword">return</span> client_done(error)
tu.make_client(seneca, make_send, client_options, client_done)
<span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">make_send</span> (<span class="hljs-params">spec, topic, send_done</span>) </span>{
<span class="hljs-keyword">var</span> acttopic = topic + <span class="hljs-string">'_act'</span>
<span class="hljs-keyword">var</span> restopic = topic + <span class="hljs-string">'_res'</span>
channel.on(<span class="hljs-string">'error'</span>, send_done)
channel.assertQueue(acttopic)
channel.assertQueue(restopic)
seneca.log.debug(<span class="hljs-string">'client'</span>, <span class="hljs-string">'subscribe'</span>, restopic, client_options, seneca)</pre></div></div>
</li>
<li id="section-4">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-4">¶</a>
</div>
<p>Subscribe</p>
</div>
<div class="content"><div class='highlight'><pre> channel.consume(restopic, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">message</span>) </span>{
<span class="hljs-keyword">var</span> content = message.content ? message.content.toString() : <span class="hljs-literal">undefined</span>
<span class="hljs-keyword">var</span> input = tu.parseJSON(seneca, <span class="hljs-string">'client-'</span> + type, content)
tu.handle_response(seneca, input, client_options)
})</pre></div></div>
</li>
<li id="section-5">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-5">¶</a>
</div>
<p>Publish</p>
</div>
<div class="content"><div class='highlight'><pre> send_done(<span class="hljs-literal">null</span>, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">args, done</span>) </span>{
<span class="hljs-keyword">var</span> outmsg = tu.prepare_request(<span class="hljs-keyword">this</span>, args, done)
<span class="hljs-keyword">var</span> outstr = tu.stringifyJSON(seneca, <span class="hljs-string">'client-rabbitmq'</span>, outmsg)
channel.sendToQueue(acttopic, <span class="hljs-keyword">new</span> Buffer(outstr))
})
seneca.add(<span class="hljs-string">'role:seneca,cmd:close'</span>, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">close_args, done</span>) </span>{
<span class="hljs-keyword">var</span> closer = <span class="hljs-keyword">this</span>
channel.close()
connection.close()
closer.prior(close_args, done)
})
}
})
})
}
<span class="hljs-keyword">return</span> {
name: plugin
}
}</pre></div></div>
</li>
</ul>
</div>
</body>
</html>