![]() Similarly, when deserializing, the serializer needs access to a constructor to instantiate the type, and also to setters for the object’s properties and fields. When serializing, the serializer needs access to the object’s property and field getters. To process a type, the serializer needs information about how to access its members. NET objects into JSON strings, and deserializes. JsonSerializer is a tool that serializes. Person = JsonSerializer.Deserialize(utf8Json, ): Why do source generation? Public static MyJsonContext Default īyte utf8Json = JsonSerializer.SerializeToUtf8Bytes(person, ) Internal partial class MyJsonContext : JsonSerializerContextĪs part of the build, the source generator will augment the MyJsonContext partial class with the following shape: internal partial class MyJsonContext : JsonSerializerContext We would specify the type to the source generator as follows: using To opt into source generation, you can define a partial class which derives from a new class called JsonSerializerContext, and indicate serializable types using a new JsonSerializableAttribute class.įor example, given a simple Person type to serialize: namespace Test The approach the JSON source generator takes to provide these benefits is to move the runtime inspection of JSON-serializable types to compile-time, where it generates a static model to access data on the types, optimized serialization logic using Utf8JsonWriter directly, or both. Existing JsonSerializer functionality will continue to work as-is, so it’s your decision whether you use the new source generator. The JSON source generator works in conjunction with JsonSerializer, and can be configured in multiple ways. NET 6, we are including a new source generator as part of. NET applications, including increased performance. ![]() Generating source code at compile time can provide many benefits to. Source generators generate C# source files that can be compiled as part of the library or application build. Reflection is a problem for startup, memory usage, and assembly trimming.Īn alternative to runtime reflection is compile-time source generation. Reflection provides great capability for certain scenarios, but not as the basis of high-performance cloud-native applications (which typically (de)serialize and process a lot of JSON documents). NET SDK required for C# source generation is. The API shape of the generated source code is consistent across the TFMs, but the implementation may vary based on the framework APIs that are available on each TFM. The source generator is compatible with other target framework monikers (TFMs) aside from. NET 6.0 Preview 7 this won’t be necessary when targeting net6.0. You can try out the source generator by using the latest build of the NuGet package. NET C# project, including console applications, class libraries, web, and Blazor applications. JsonSerializer + pre-generating data access model JsonSerializer + pre-generating optimized serialization logic Here’s an overview of the functionality that each serialization model provides: ![]() In both source-generation scenarios, the generated artifacts are passed directly to JsonSerializer as a performance optimization. There is the existing model which is backed by runtime reflection, and two new compile-time source generation modes where the generator generates optimized serialization logic, a static data access model, or both. NET to choose from, using JsonSerializer. With the introduction of the source generator, we now have a few models for JSON serialization in. ![]() In this post, I’ll go over why we built it, how it works, and what benefits you can experience in your application. NET 6.0, we are shipping a new C# source generator to help improve the performance of applications that use.
0 Comments
Leave a Reply. |