我们如何衡量在两个不同的Java应用程序中完成流程所需的总时间？

I have two different java applications integrated with each other. Consider them A (will be running on EDGE) & B(Running on cloud). Suppose if I receive some data in A and then it sends it to B to complete some processing and persist, how best can we measure the total time taken to complete the flow ?. I was actually relying on the log time to do this. I also went through I have two different java applications integrat