我正在尝试使用AMQP,Websockets和Ruby构建一个简单的聊天应用程序。我明白,这可能不是理解AMQP的最佳用例,但我想知道我错在哪里。AMQP创建订阅动态队列
以下是我的AMQP的服务器代码
require 'rubygems'
require 'amqp'
require 'mongo'
require 'em-websocket'
require 'json'
class MessageParser
# message format => "room:harry_potter, nickname:siddharth, room:members"
def self.parse(message)
parsed_message = JSON.parse(message)
response = {}
if parsed_message['status'] == 'status'
response[:status] = 'STATUS'
response[:username] = parsed_message['username']
response[:roomname] = parsed_message['roomname']
elsif parsed_message['status'] == 'message'
response[:status] = 'MESSAGE'
response[:message] = parsed_message['message']
response[:roomname] = parsed_message['roomname'].split().join('_')
end
response
end
end
class MongoManager
def self.establish_connection(database)
@db ||= Mongo::Connection.new('localhost', 27017).db(database)
@db.collection('rooms')
@db
end
end
@sockets = []
EventMachine.run do
connection = AMQP.connect(:host => '127.0.0.1')
channel = AMQP::Channel.new(connection)
puts "Connected to AMQP broker. #{AMQP::VERSION} "
mongo = MongoManager.establish_connection("trackertalk_development")
EventMachine::WebSocket.start(:host => '127.0.0.1', :port => 8080) do |ws|
socket_detail = {:socket => ws}
ws.onopen do
@sockets << socket_detail
end
ws.onmessage do |message|
status = MessageParser.parse(message)
exchange = channel.fanout(status[:roomname].split().join('_'))
if status[:status] == 'STATUS'
queue = channel.queue(status[:username], :durable => true)
unless queue.subscribed?
puts "--------- SUBSCRIBED --------------"
queue.bind(exchange).subscribe do |payload|
puts "PAYLOAD : #{payload}"
ws.send(payload)
end
else
puts "----ALREADY SUBSCRIBED"
end
# only after 0.8.0rc14
#queue = channel.queue(status[:username], :durable => true)
#AMQP::Consumer.new(channel, queue)
elsif status[:status] == 'MESSAGE'
puts "********************* Message- published ******************************"
exchange.publish(status[:message)
end
end
ws.onclose do
@sockets.delete ws
end
end
end
我使用状态指示输入消息是否是正在进行的聊天或需要我来处理家务事像订阅队列中的状态消息的消息。
我所面临的问题是,当我发送邮件一样 socket.send(JSON.stringify({status:'message', message:'test', roomname:'Harry Potter'}))
的exchange.publish' is called but it still doesn't get pushed via the
ws.send`到浏览器。
我对EventMachine和AMQP的理解有没有根本性的错误?
下面是相同的代码pastie http://pastie.org/private/xosgb8tw1w5vuroa4w7a
我的代码似乎希望在工作的时候取出durable => true
从queue = channel.queue(status[:username], :durable => true)
以下是我的Rails的片段查看标识用户的用户名和房间名称并通过Websockets将其作为消息的一部分发送。
虽然代码似乎工作,当我删除durable => true
我不明白为什么会影响被传递的消息。请忽略mongo的一部分,因为它还没有发挥任何作用。
我也想知道,如果我的方法来AMQP和它的使用是正确的
<script>
$(document).ready(function(){
var username = '<%= @user.email %>';
var roomname = 'Bazingaa';
socket = new WebSocket('ws://127.0.0.1:8080/');
socket.onopen = function(msg){
console.log('connected');
socket.send(JSON.stringify({status:'status', username:username, roomname:roomname}));
}
socket.onmessage = function(msg){
$('#chat-log').append(msg.data);
}
});
</script>
<div class='block'>
<div class='content'>
<h2 class='title'><%= @room.name %></h2>
<div class='inner'>
<div id="chat-log">
</div>
<div id="chat-console">
<textarea rows="5" cols="40"></textarea>
</div>
</div>
</div>
</div>
<style>
#chat-log{
color:#000;
font-weight:bold;
margin-top:1em;
width:900px;
overflow:auto;
height:300px;
}
#chat-console{
bottom:10px;
}
textarea{
width:100%;
height:60px;
}
</style>
如果我将amqp代码作为守护程序运行,是否有人可以告诉我如何在生产环境中组织我的代码。任何能够帮助我组织代码的示例代码都会有很大的帮助。 – Sid