JMeter中如何实现API返回COMPLETED时仅执行一次End Ride API并停止？

我在打车预订应用的JMeter测试场景中，需要在API响应返回COMPLETED状态时，仅执行一次End Ride API并停止后续执行。目前用While控制器实现时出现了无限循环问题。

已通过jsonlint.com验证的API响应：

{"id":3820,"status":"COMPLETED","rider":{"id":2019,"firstname":"test","lastname":"rider","phoneNumber":"9000000124","email":"Test_rider_10002@popp1.com","rating":5.0,"user":{},"fullName":"test rider"},"startLocationLat":36.10805389068134,"startLocationLong":-115.16570490025539,"endLocationLat":36.10805389068134,"endLocationLong":-115.16570490025539,"startAddress":"73 South Martin Luther King Boulevard","endAddress":"920 West Bonanza Road","start":{"address":"73 South Martin Luther King Boulevard","zipCode":"89106"},"end":{"address":"920 West Bonanza Road"},"surgeFactor":1.00,"driverPayment":"4.00","requestedCarType":{"title":"STANDARD","carCategory":"REGULAR","plainIconUrl":"https://media.ride-vegas.com/regular.png","configuration":"{\"skipRideAuthorization\": false}"},"requestedDriverTypes":[],"freeCreditCharged":"0.00"}

当前实现代码与问题 #

JSR223采样器代码（放在While控制器内） #

import groovy.json.JsonSlurper;

def jsonSlurper = new JsonSlurper();
def apiDetails = new groovy.json.JsonSlurper().parse(current.getResponseData())
def eventStatus=apiDetails.status
def shouldRun = "1"

if(eventStatus =="COMPLETED") {
  shouldRun = "0"
}
vars.put("shouldRun", shouldRun+"")
log.info("shouldRun: " + vars.get("shouldRun"));

While控制器条件 #

${__jexl3("${shouldRun}" != "0" && ${__jm__While Controller__idx} < 2,)}

修复方案 #

问题核心 #

1. shouldRun变量每次进入循环都会被重置为"1"，即使之前因状态为COMPLETED设置为"0"，也会被覆盖，导致循环无法终止。
2. 循环条件里的次数限制逻辑冗余，且无法精准匹配"状态达标即执行一次End Ride并停止"的需求。

正确实现步骤 #

1. 初始化变量：在While控制器外部添加JSR223采样器，仅初始化一次shouldRun：

vars.put("shouldRun", "1")

2. 修改循环内的JSR223采样器代码：去掉每次重置shouldRun的逻辑，仅在状态为COMPLETED时更新变量：

import groovy.json.JsonSlurper

def apiDetails = new JsonSlurper().parse(current.getResponseData())
def eventStatus = apiDetails.status

if (eventStatus == "COMPLETED") {
    vars.put("shouldRun", "0")
}
log.info("shouldRun: " + vars.get("shouldRun"))

3. 调整While控制器条件：仅保留shouldRun的判断，确保状态达标后立即终止循环：

${__jexl3("${shouldRun}" != "0",)}

4. 精准控制End Ride API执行：在While控制器内，将End Ride API请求放在JSR223采样器之后，添加If控制器，条件设为：

${__jexl3("${shouldRun}" == "0",)}

这样只有当状态变为COMPLETED时，才会执行一次End Ride API。

执行流程说明 #

• 初始化shouldRun为"1"
• 进入While循环，调用查询订单状态的API
• JSR223采样器解析响应，若状态为COMPLETED则将shouldRun设为"0"
• If控制器检测到shouldRun为"0"，执行End Ride API
• 下一轮循环时，While控制器判断shouldRun为"0"，直接终止循环

内容的提问来源于stack exchange，提问作者Snehal Matharu