O'Reilly logo

Architectural Patterns by Harihara Subramanian, Anupama Raman, Pethuru Raj

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Service callback

Assume you are calling a customer care center from your telephone. Once connected, you hear an automated message saying that all of their customer care executives are busy, and so ask you to wait on the line. You may even be one of many waiting for the same service executive (concurrency and multiple threads). Now, you have two options to choose from; one is to hold the line and wait for someone to speak to, and two is to hang up and try again after some time. However, trying again after some time may have you ending up in the same situation. 

How about the customer care executive calls you back? You dial the number, the system picks up your number, and says that it will call you back automatically when the customer care ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required