JMeter-生成对象并添加到数组

因此，我想通过发送高负载的消息来对websocket通信和服务器进行压力测试。问题是这些消息是以一种特殊的方式格式化的，我正在努力生成正确的数据

因此，每次我从客户端发送消息时，发送到服务器的消息看起来有点像这样：

42["tickets","ticket_message",
{"ticket":{
 "body":[
  {"received":"2018-05-17T11:28:51.000Z","fromName":"Jesper Pedersen","body":"test\n"},
  {"received":"2018-05-17T13:30:53+02:00","body":"Yo","fromName":"Futurum Digital"}
 ] 
}]

 "body":[
  {"received":"2018-05-17T11:28:51.000Z","fromName":"Jesper Pedersen","body":"test\n"},
  {"received":"2018-05-17T13:30:53+02:00","body":"Yo","fromName":"Futurum Digital"},
  {"received":"2018-05-17T13:38:43+02:00","body":"Yo again","fromName":"Futurum Digital"}
 ] 

每次创建新消息时，消息都会添加到正文中。因此，如果我发送一条新消息，身体将如下所示：

42["tickets","ticket_message",
{"ticket":{
 "body":[
  {"received":"2018-05-17T11:28:51.000Z","fromName":"Jesper Pedersen","body":"test\n"},
  {"received":"2018-05-17T13:30:53+02:00","body":"Yo","fromName":"Futurum Digital"}
 ] 
}]

 "body":[
  {"received":"2018-05-17T11:28:51.000Z","fromName":"Jesper Pedersen","body":"test\n"},
  {"received":"2018-05-17T13:30:53+02:00","body":"Yo","fromName":"Futurum Digital"},
  {"received":"2018-05-17T13:38:43+02:00","body":"Yo again","fromName":"Futurum Digital"}
 ] 

我想知道如何通过某种方式使用Beanshells预处理器，用JMeter循环这个过程。也就是说，我希望每个线程循环都向该数组体添加一条新消息。我需要一些数组列表来保存每个循环中的数据，并添加一条新消息，如下所示：

{"received":"new date","body":"new message again","fromName":"Futurum Digital"}

在每个线程循环上

我有一个CSV文件，其中包含我正在设置为可变消息的消息：

message1,
message2

我想我需要这样的函数，不正确的Java语法，翻译成javascript：

var messages = ${SOME_GLOBAL_MESSAGES_ARRAY}
var message = {"received": new Date().toString(),"body":"${MESSAGE}", "fromName":"Futurum Digital"}

messages.push(message)
vars.put('messageList', messages);

但我没有Java和Beanshell方面的经验，也不知道如何做到这一点。我真的很感激任何帮助

假设您的body值为

{
  "body": [
    {
      "received": "2018-05-17T11:28:51.000Z",
      "fromName": "Jesper Pedersen",
      "body": "test\n"
    }
  ]
}

您可以添加另一个带有a和代码的条目，如：

def json = new  groovy.json.JsonSlurper().parseText(vars.get('body'))
def body = json.body
def newEntry = new groovy.json.internal.LazyMap()
newEntry.put('received', '2018-05-17T13:30:53+02:00')
newEntry.put('fromName', 'foo')
newEntry.put('body', 'bar')
body.add(newEntry)
vars.put('body', new groovy.json.JsonBuilder(json).toPrettyString())

演示：

更多信息：

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我应该在哪里设置这个JMeter变量？在你的情况下，数组会保留插入的对象还是在每个循环上重置？你可以在任何地方设置初始变量，它可以使用即从响应中提取，或者你可以通过硬编码它的值。上述代码在每次调用时都会添加一个条目，不会进行重置。@Dmitri\T感谢您的帮助。如何仅从主体获取和设置数组值？