Understanding and implementing orchestration
When we think of the word orchestration, we think of coordination. An orchestra is a coordinated combination of musicians all working towards producing the same kind of music. Each musician plays their part, but they are led by a conductor who guides each of them along the same path.
The orchestration method of implementing a saga is not very different in terms of how we need a central point of control (like a conductor), and all the services are monitored by the central point of control to ensure that they play their part well, or report failure accordingly. The central control is referred to as an orchestrator and it is a microservice that sits between the client and all other microservices. It handles all the transactions, telling participating services when to complete an operation based on feedback it receives during the saga. The orchestrator executes the request, tracks and interprets the request’s state after each task...
