Use rxjava with retrofit enqueue8/31/2023 ![]() ![]() I think a good compromise in your situation would be to start using. It has an enqueue method with a callback with onSuccess and onFailure. ![]() 139 comments, 3 shares, Facebook Watch Videos from The Retrofit Source: We NEED. In the Apollo Android docs, theres an example that does not use RxJava, and one that does use it.The one that does not has an API very similar to that of Retrofit Call. Override fun enqueue( callback : Callback>) Ĭallback.onResponse( Response. Please use best practices if you perform this job such as soldering iron. We are also specifying the JSON converter we need (Gson) in line 13. Call interface provides two methods for making the HTTP requests: execute () Synchronously send the request and return its response. This URL will then be used to build the instance in line 12. Each call yields its own HTTP request and response pair. All subclasses of a sealed class are known at compile-time, which allows you to use them exhaustively in the when expression.Īs you’ve seen in the figure above, there are typically three scenarios where you’d want to construct a sealed class: Call.execute () and Call.enqueue () Methods In Retrofit 2, all requests are wrapped into a retrofit2.Call object. Sealed classes represent quite more restricted class hierarchies than normal classes in Kotlin. Modeling Retrofit Responses With Sealed Classes/Interfaces RxJava: Android MVVM App structure with Retrofit Manuel Vivo Follow 14 min read 12 Introduction Creating an App structure for Android which is easy to maintain and debug is. Let’s see how to construct the wrapper class with a sealed class. 5 Photo by James McKinven on Unsplash The use of RxJava has really shielded us away from topics like this because RxJava is now a ubiquitous term with android development, so. For example, configuring UI elements and displaying a different placeholder/toast depending on error types. C with delegates) or it’s part of the language nature that it even leads to a callback hell (Node.js). A lot of high-level programming languages have the asynchronousity build in (e.g. So how do you solve this problem? It’s simple: Wrap every possible scenario of an API response with a sealed class as in the figure below:īy passing a wrapper class to the call site, the presentation layer can handle results depending on the response type. Call, finally this call calls the Enqueue method to ask for asynchronous request HTTP, which is a basic Retrofit network request. Returning the result of a long-running function at a later time is an important aspect of programming. This means you should write lots of try-catch boilerplate code for each API request. You also need to handle exceptions somewhere in this multi-layer architecture, because API calls may throw an exception and it can be propagated to the call site. So if you return an empty list or null when the network request fails, other layers have no idea how to figure out whether the request was successful or not. The fetchPoster function may return an empty list if the body of the API response is empty. In this architecture, you will face the following problem: results are ambiguous on call sites. But suppose you need to handle the response and exceptions in a multi-layer architecture as in the API data flow below: Also, I think the real culprit is really okhttp, look at the implementation of RealCall.This snippet is a basic example of calling the Retrofit API and handling the response. ![]()
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