6. Task serialization

Date: 2019-10-02

Status

Accepted (lazy consensus) & implemented

Context

By switching the task manager to a distributed implementation, we need to be able to execute a Task on any node of the cluster. We need to have a way to describe the Task to be executed and serialize it in order to be able to store it in the Created event. Which will be persisted in the Event Store, and will be send in the event bus.

At this point in time a Task can contain any arbitrary code. It's not an element of a finite set of actions.

Decision

  • Create a Factory for one Task
  • Inject a Factory Registry via a Guice Module
  • The Task Serialization will be done in JSON, We will get inspired by EventSerializer
  • Every Tasks should have a specific integration test demonstrating that serialization works
  • Each Task is responsible of eventually dealing with the different versions of the serialized information

Consequences

  • Every Tasks should be serializable.
  • Every Tasks should provide a Factory which would be responsible to deserialize the task and instantiate it.
  • Every Factory should be registered through a Guice module to be created for each project containing a Factory

References