> For the complete documentation index, see [llms.txt](https://docs.eventoframework.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.eventoframework.com/getting-started/todolist-recq-tutorial/recq-components-evento-implementation-with-spring-data.md).

# RECQ Components Evento Implementation with Spring Data

Now that we have implemented our payloads we can proceed with implementing components (Aggregates, Projector, Projections, Invokers) handling messages carrying those payloads.

{% hint style="info" %}
We suggest developing Aggregates and Services first, then Projector and Projections at the end Sagas or Observers. Invokers are the last.
{% endhint %}

We will proceed with this order:

* TodoListAggregate
* TodoList Domain in Spring Data
* TodoListProjector
* TodoListProjection
* TodoListInvoker
* Todo List Controller in Spring Web