Java EE 8 Design Patterns and Best Practices

Chained pattern

The purpose of the chained pattern is to present a more consistent and definitive final response to the client using a chain of services that communicate sequentially. In this way, Service A that acts as a first service in the chain communicate with Service B. Service B communicates with Service C, and so on. The calls are synchronous and the client remains locked until the final response returns from Service A to the client. 

It is important to note here that the requests that arrive at the chain services may be different. In this way, the request sent from Service A to Service B may be very different from the request sent from Service B to Service C, and so on. In the same way, the response of the services may also be different. ...