Question 1

How to integrate PipelinR with Spring Boot for dependency injection?

Accepted Answer

Define a Pipeline bean in a configuration class, injecting handlers and middlewares via ObjectProvider. The README shows a Spring example where handlers use @Component and middlewares use @Order for automatic registration and ordering.

Question 2

PipelinR vs Axon Framework for CQRS in Java?

Accepted Answer

PipelinR is a lightweight, in-process command pipeline similar to MediatR, ideal for simple command-handler patterns. Axon Framework is a full-featured CQRS and event sourcing solution, better suited for complex event-driven architectures with distributed processing.

Question 3

Does PipelinR support Kotlin coroutines for async handling?

Accepted Answer

PipelinR works with Kotlin as it's a Java library, but its async support is based on CompletableFuture. For coroutines, you'll need to use interoperability libraries or adapt the handlers to return Kotlin's native types like Deferred.

Question 4

What's the best way to handle exceptions in PipelinR notifications?

Accepted Answer

Use notification handling strategies like ContinueOnException, which captures exceptions in an AggregateException. For custom error handling, implement middleware to wrap handler invocations, as shown in the notification middleware example.

Question 5

Can PipelinR be used in a microservices architecture?

Accepted Answer

Yes, but it's designed for in-process command handling within a single service. For cross-service communication, you'll need to layer it with API gateways or messaging systems, as it lacks built-in distributed capabilities.

PipelinR

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