Question 1

Unirest Java vs Apache HttpClient: which should I use?

Accepted Answer

Unirest offers a simpler, fluent API that reduces boilerplate for quick development, while Apache HttpClient provides more low-level control and features for complex HTTP scenarios. Unirest is lightweight, but HttpClient is better for advanced needs like custom connection management.

Question 2

How to handle JSON requests with Unirest Java?

Accepted Answer

Use methods like `.header("Content-Type", "application/json")` and `.body(jsonString)` in the fluent API to send JSON data. Unirest can parse responses to JSON objects, simplifying serialization and deserialization for REST APIs.

Question 3

Does Unirest Java support async requests?

Accepted Answer

Yes, it provides async methods such as `.asStringAsync()` for non-blocking calls. However, it lacks deep integration with reactive streams, so for complex asynchronous workflows, other libraries might be more suitable.

Question 4

Is Unirest Java thread-safe for high concurrency?

Accepted Answer

Basic usage is thread-safe, but for high-concurrency scenarios, you need to configure connection pooling manually. The documentation recommends proper setup to avoid performance issues under heavy load.

Question 5

How to upgrade from Unirest 3 to Unirest 4?

Accepted Answer

Follow the upgrade guide on the documentation site, as dependencies have changed to new Maven coordinates. Be prepared for potential breaking changes and adjust your code accordingly to avoid conflicts.

Question 6

Can I use Unirest with Spring Boot microservices?

Accepted Answer

Yes, Unirest integrates well by adding the dependency and configuring it as a bean. It's effective for simple inter-service communication, but for full Spring ecosystem integration, WebClient might offer better support.

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