Hands-On Software Architecture with Golang

The orchestrator pattern

The grep-the-web architecture is an implementation of the orchestrator pattern. This pattern is generally used for application workflows, which involve a number of steps, some of which are long-winded, or which might access remote services. The individual steps are generally independent of each other, but need to be orchestrated by some application logic.

The solution consists of the following roles:

• Scheduler: The orchestrator sets up the workflow graph of various steps to be performed and initiates the processing. This component is responsible for spawning Agents and passing on any parameters needed for each Agent.
• Agent: This is a container for running each step, and usually involves calling external services ...