Antwort Why WebClient is better than RestTemplate? Weitere Antworten – Is WebClient better than RestTemplate
WebClient was introduced and designed specifically for the WebFlux stack. Unlike RestTemplate, it was not based on an old-fashioned template-based API and followed the modern functional and fluent style API. The WebClient API is much clearer than the RestTemplate, and they are equivalent to HTTP methods.Disadvantages of RestTemplate:
Non-Reactive: RestTemplate is not based on Reactor and does not natively support the reactive model, which could limit performance in high-concurrency applications.Why RestTemplate Got Deprecated: Blocking Nature: RestTemplate is a blocking, synchronous client. It means that the thread that executes the request blocks until the operation completes, potentially leading to thread pool exhaustion and higher latency under heavy load.
What is the alternative to RestTemplate : WebClient
With the advent of Spring WebFlux, an asynchronous, non-blocking web framework, WebClient was introduced as a modern alternative to RestTemplate .
Why use WebClient
It provides means to compose asynchronous logic through the Reactive Streams API. As a result, the reactive approach can process more logic while using fewer threads and system resources, compared to the synchronous/blocking method. WebClient is part of the Spring WebFlux library.
What are the disadvantages of WebClient : However, the web client also has some drawbacks, such as slower performance, limited customization, and dependency on the server.
RestTemplate uses Java Servlet API and is therefore synchronous and blocking. Conversely, WebClient is asynchronous and will not block the executing thread while waiting for the response to come back. The notification will be produced only when the response is ready.
RestTemplate has been deprecated in favor of the newer WebClient in Spring Framework 5.0 and later versions. This means that while the RestTemplate is still available for use, Spring developers are encouraged to migrate to WebClient for new projects.
Is WebClient thread safe
Once created, the WebClient is immutable which makes it thread safe. You can use webClient. mutate() to reconfigure it and get a new instance.The Webclient WebDAV service, once a prominent feature in Windows, has been officially deprecated. This indicates that Microsoft is gradually reducing the help and updates for this service, showing that they plan to stop using it in upcoming versions of the operating system.HttpClient is the recommended way of making HTTP requests in . NET, as it is more flexible, efficient, and has better performance compared to WebClient.
RestTemplate is synchronous and may lead to blocking calls, while WebClient offering a non-blocking, reactive approach. FeignClient supports both synchronous and asynchronous communication, offering flexibility based on project requirements.
How long is RestTemplate keep alive : A connection Keep-Alive strategy determines how long a connection may remain unused in the pool until it is closed. This ensures that connections that are no longer needed are closed again promptly. header in the response, the connections are kept alive for 20 seconds by default.
Why do we use WebClient : Spring WebClient is a non-blocking and reactive web client to perform HTTP requests. It is also the replacement for the classic RestTemplate. It is a part of spring-webflux library and also offers support for both synchronous and asynchronous operations.
Should you still use RestTemplate
RestTemplate will still be used. But in some cases, the non-blocking approach uses much fewer system resources compared to the blocking one. So, WebClient is a preferable choice in those cases.
RestTemplate is thread-safe once constructed. Objects of the RestTemplate class do not change any of their state information to process HTTP: the class is an instance of the Strategy design pattern.Once created, the WebClient is immutable which makes it thread safe. You can use webClient. mutate() to reconfigure it and get a new instance.