Shulou(Shulou.com)05/31 Report--

本篇文章为大家展示了node.js中怎么对CQS进行操作，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。

怎样使用node.js来操作CQS

安装：

$npminstallcqs

初始化你的CQS模块：

//Anormalimport.

varcqs=require('cqs');

//Pre-applymycouchanddbname.

cqs=cqs.defaults({"couch":"https://user:password@example.iriscouch.com"

,"db":"cqs_queue"

});

列出所有的队列：

cqs.ListQueues(function(error,queues){

console.log("Found"+queues.length+"queues:");

queues.forEach(function(queue){

console.log("*"+queue.name);

})

//Output:

//Found2queues:

//*a_queue

//*another_queue

})

创建一个队列：

//Justcreatewithaname.

cqs.CreateQueue("important_stuff",function(error,queue){

if(!error)

console.log("Importantstuffqueueisready");

})

//Createwithanoptionsobject.

varopts={QueueName:"unimportant_stuff"

,DefaultVisibilityTimeout:3600//1hour

};

cqs.CreateQueue(opts,function(error,queue){

if(!error)

console.log("Created"+queue.name+"withtimeout+"queue.VisibilityTimeout);

//Output

//Createdunimportant_stuffwithtimeout3600

})

怎样使用node.js来操作CQS

添加一个队列消息：

//TheconvenientobjectAPI:

important_stuff.send(["keepthese","things","inorder"],function(error,message){

if(!error)

console.log('Sent:'+JSON.stringify(message.Body));

//Output:

//Sent:["keepthese","things","inorder"]

})

cqs.SendMessage(important_stuff,"Thismessageisimportant!",function(error,message){

if(!error)

console.log('Sentmessage:'+message.Body);

//Output:

//Sentmessage:Thismessageisimportant!

})

//Or,justusethequeuename.

cqs.SendMessage('some_other_queue',{going_to:"theotherqueue"},function(error,message){

if(!error)

console.log('Message'+message.MessageId+'isgoingto'+message.Body.going_to);

//Output:

//Messagea9b1c48bd6ae433eb7879013332cd3cdisgoingtotheotherqueue

})

接收并处理一条队列消息：

//TheconvenientobjectAPI:

my_queue.receive(function(error,messages){

if(!error)

console.log('Receivedmessage:'+JSON.stringify(messages[0].Body));

//Output:

//Receivedmessage:

})

//ThestandardAPI,receivingmultiplemessages

cqs.ReceiveMessage(some_queue,5,function(er,messages){

if(!error)

console.log('Received'+messages.length+'messages');

//Output:

//Receivedmessages

})

删除一条队列消息：

//TheconvenientobjectAPI:

message.del(function(error){

//Messagedeletionneverresultsinanerror.Ifamessageissuccessfully

//deleted,itwillsimplyneverappearinthequeueagain.

console.log('Messagedeleted!');

})

//ThestandardAPI:

cqs.DeleteMessage(my_message,function(error){

console.log('Messagedeleted');

})

上述内容就是node.js中怎么对CQS进行操作，你们学到知识或技能了吗？如果还想学到更多技能或者丰富自己的知识储备，欢迎关注行业资讯频道。

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.