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Articles by Services. AddSingleton
Design Patterns #2: You don't know Singleton.
Every software developer encounters this pattern regularly, often working with it on a daily basis. In this article, I’ll explore the different types of Singleton patterns, their implementation nuances, and how they impact performance. Let’s dive in! Classic implementation. This implementation is widely regarded as an antipattern. While it may seem convenient at first glance, it often leads to issues. Let’s break down why this approach can be problematic and explore better alternatives.
O MediatR é uma biblioteca que implementa o padrão Mediator, facilitando a comunicação entre diferentes partes de uma aplicação sem que elas precisem estar diretamente acopladas. Isso promove um design mais modular e flexível. Ele é amplamente utilizado em aplicações para gerenciar comandos e eventos de forma centralizada. Neste exemplo, veremos como utilizar o MediatR para enviar um comando e processar sua resposta em um manipulador.
MediatR is a library that implements the Mediator pattern, facilitating communication between different parts of an application without them being directly coupled. This promotes a more modular and flexible design. It is widely used in applications to manage commands and events in a centralized way. In this example, we will see how to use MediatR to send a command and process its response in a handler.
IEnumerable Dependency Injection with Strategy Pattern and Factory Method in .NET Core
In modern .NET Core development, combining the Strategy Pattern, Factory Method, and IEnumerable<IService> built-in Dependency Injection provides a flexible, scalable solution. This pattern combination is ideal for handling dynamic behaviors, such as choosing different algorithms at runtime without modifying core logic. This article will break down how to implement this approach with an example of sending notifications using different strategies (e.g., Email, SMS).
Use MassTransit To Implement OutBox Pattern with EF Core and MongoDB
Maintaining data consistency and ensuring reliable message delivery in microservices architectures can be challenging. In monolithic applications, consistency is achieved by using database transactions. But they fall short in distributed environments. In distributed systems, each microservice performs its action within a database transaction. This ensures that the changes made by the microservice are atomic and consistent.
WPF/C#：在WPF中如何实现依赖注入 - mingupupup - 博客园
前言 本文通过 WPF Gallery 这个项目学习依赖注入的相关概念与如何在WPF中进行依赖注入。 什么是依赖注入 依赖注入（Dependency Injection，简称DI）是一种设计模式，用于实现控制反转（Inversion of Control，简称IoC）原则。依赖注入的主要目的是将对象的创建和对象之间的依赖关系的管理从对象内部转移到外部容器或框架中，从而提高代码的可维护性、可测试性和灵活性。 依赖注入的核心概念 依赖：一个对象需要另一个对象来完成其工作，那么前者就依赖于后者。例如，一个OrderService类可能依赖于一个ProductRepository类来获取产品信息。 注入：将依赖的对象传递给需要它的对象，而不是让需要它的对象自己去创建依赖的对象。注入可以通过构造函数、属性或方法参数来实现。 容器：一个管理对象创建和依赖关系的框架或库。容器负责实例化对象，解析依赖关系，并将依赖的对象注入到需要它们的对象中。 依赖注入的类型 构造函数注入：依赖的对象通过类的构造函数传递。 public class OrderService { private readonly...
探索Native Plugins：开启大模型的技能之门
前言 上一章节我们了解了一下Semantic Kernnel中Plugins插件的概念以及学习了的 Semantic Kernel 模板插件的创建,本章节我们来学习 Native Plugins 原生函数插件使用。 通过函数定义插件 在之前的章节中我们介绍过在在 Semantic Kernel 中应用 Function Calling,在文中讲解了Functioncalling的概念,以及在SK中的应用。 在Semantic Kernel中定义Native Plugins 函数插件，和 gpt-3.5-turbo 在 6 月 13 日 发布的 Function Calling特别的像，这是通过增加外部函数，通过调用来增强 OpenAI 模型的能力。 在Semantic Kernerl 中提供了很多定义Native Plugins的扩展方法来创建插件下面介绍最常用的几种： 根据类型创建插件 SK源码 public static KernelPlugin ImportPluginFromType<T>(this Kernel kernel, string?
Asp-Net-Core开发笔记：进一步实现非侵入性审计日志功能 - 程序设计实验室 - 博客园
前言 上次说了利用 AOP 思想实现了审计日志功能，不过有同学反馈还是无法实现完全无侵入，于是我又重构了一版新的。 回顾一下：Asp-Net-Core开发笔记：实现动态审计日志功能 现在已经可以实现对业务代码完全无侵入的审计日志了，在需要审计的接口上加上 [AuditLog] 特性，就可以记录这个接口的操作日志，还有相关的实体变化记录，还算是方便。 PS：后面我发现 ABP 里自带审计功能，突然感觉有点🤡了 重构 先对之前的代码进行重构，之前把跟审计有关的代码分散到各个目录中，这个功能其实是个整体，应该把代码归集到一起比较好。 创建 src/Acme.Demo/Contrib/Audit 目录 （注：Acme.Demo 是项目名称，随便起的） 目录结构如下 Audit ├─ Services │ ├─ IAuditLogService.cs │ ├─ AuditLogService.cs │ └─ AuditLogMongoService.cs ├─ Middlewares │ └─ AuditLogMiddleware.cs ├─ Filters │ └─...
现代WPF界面轻松实现：探秘轻量级WPFUI库，MVVM与依赖注入一体化-51CTO.COM
2024-03-26 08:33:48 最近要做个小工具软件，发现以前用的WPF界面有点老了，所以在网上找下，发现一个用起来还可以的WPFUI库，MVVM也支持得很好，同时支持微软官方的依赖注入框架Microsoft.Extensions.DependencyInjection。 概述：一款名为WPFUI的轻量级开源库，为WPF应用程序提供现代化界面。支持MVVM和Microsoft.Extensions.DependencyInjection，简单上手。无第三方依赖，内置两套皮肤，可自定义样式。适用于一般应用场景，不受MVVM框架限制。通过简单的引用和配置，快速构建现代化WPF应用，提升用户体验 最近要做个小工具软件，发现以前用的WPF界面有点老了，所以在网上找下，发现一个用起来还可以的WPFUI库，MVVM也支持得很好，同时支持微软官方的依赖注入框架Microsoft.Extensions.DependencyInjection。 先来看看运行效果： 使用方法也比较简单。 <Application x:Class="DesktopApp.App"...
.net8+webapi+sqlsugar基本配置；“连接数据库过程中发生错误，检查服务器是否正常连接字符串是否正确”异常_copynew().ado.isvalidconnection()-CSDN博客
1、引入sqlsugar的nugat包 2、封装一个操作类（参考sqlsugar官方文档） public static class SqlsugarSetup { public static void AddSqlsugarSetup(this IServiceCollection services, IConfiguration configuration,string dbName = "db_master") { SqlSugarScope sqlSugar = new SqlSugarScope(new ConnectionConfig() { DbType = SqlSugar.DbType.SqlServer, ConnectionString = configuration.GetConnectionString(dbName), IsAutoCloseConnection = true, }, db => { //单例参数配置，所有上下文生效 db.Aop.OnLogExecuting = (sql, pars) => {...
【译】.NET 8 网络改进（二）
原文 | Máňa，Natalia Kondratyeva 翻译 | 郑子铭 修改 HttpClient 日志记录 自定义（甚至简单地关闭）HttpClientFactory 日志记录是长期请求的功能之一 (dotnet/runtime#77312)。 HttpClientFactory 添加的默认（“旧”）日志记录非常详细，每个请求发出 8 条日志消息： 使用请求 URI 启动通知 — 在通过委托处理程序管道传播之前； 请求标头 - 在处理程序管道之前； 使用请求 URI 启动通知 — 在处理程序管道之后； 请求标头——处理程序管道之后； 在通过委托处理程序管道将响应传播回之前，停止通知已用时间； 响应头——在传播回响应之前； 停止通知并显示经过的时间——在传播回响应之后； 响应标头 - 将响应传播回来之后。 这可以用下图来说明。在此图和下图中，* 和 [...] 表示日志记录事件（在默认实现中，日志消息被写入 ILogger），--> 表示通过应用程序层和传输层的数据流。 Request --> * [Start notification] // "Start...
Asp-Net-Core学习笔记：3.使用SignalR实时通信框架开发聊天室 - 程序设计实验室 - 博客园
在MVP杨老师的博客里看到这么个东西，我还以为是NetCore3才推出的新玩意，原来是已经有很多年的历史了，那看来还是比较成熟的一个技术了。 简介 SignalR是一个.NET Core/.NET Framework的开源实时框架，SignalR的可使用Web Socket, Server Sent Events 和 Long Polling作为底层传输方式。 SignalR基于这三种技术构建，抽象于它们之上，它让你更好的关注业务问题而不是底层传输技术问题。 以上介绍来自博客，SignalR分为客户端和服务端，服务端运行在AspNetCore上，客户端支持前端、桌面端和移动端，我去查了一下，连Flutter也有相应的支持库。 几个概念 SignalR支持三种底层传输技术，根据客户端的兼容性可以自动协商传输类型。如图 Web Socket是最好的最有效的传输方式，如果浏览器或Web服务器不支持它的话，就会降级使用SSE，实在不行就用Long Polling。 不用解释太多，Remote Procedure Call，SignalR采用RPC范式来进行服务端和客户端之间的通信。...
RestApiLocalization
Download latest Repository Archive Download local copy Because of the high level of automation in the cloud, software models and data are becoming increasingly dynamic. Let's take the example of an online fruit shop that sells its products in several countries. New products are entered by users in different languages. When designing REST APIs with localized model data, the following considerations must be taken into account What languages need to be supported?
.NET源码解读kestrel服务器及创建HttpContext对象流程 - Broder - 博客园
.NET本身就是一个基于中间件（middleware）的框架，它通过一系列的中间件组件来处理HTTP请求和响应。因此，本篇文章主要描述从用户键入请求到服务器响应的大致流程，并深入探讨.NET通过kestrel将HTTP报文转换为HttpContext对象。 通过本文，您可以了解以下内容： http的数据流转流程 源码解读kestrel服务器的运作流程及生成HttpContext对象 1.
gRPC interceptors on .NET
Read in English Read in English Feedback Edit Twitter LinkedIn Facebook Email Article 11/07/2022 7 minutes to read In this article By Ernest Nguyen Interceptors are a gRPC concept that allows apps to interact with incoming or outgoing gRPC calls. They offer a way to enrich the request processing pipeline. Interceptors are configured for a channel or service and executed automatically for each gRPC call.
gRPC for .NET configuration
Read in English Read in English Feedback Edit Twitter LinkedIn Facebook Email Article 10/15/2022 6 minutes to read In this article Configure services options gRPC services are configured with AddGrpc in Startup.cs. Configuration options are in the Grpc.AspNetCore.Server package. The following table describes options for configuring gRPC services: Option Default Value Description MaxSendMessageSize null The maximum message size in bytes that can be sent from the server.
Building a Topic Exchange with RabbitMQ and .NET 6
What Is RabbitMQ? At a high level, RabbitMQ is an open source message broker. A message broker accepts messages from a producer (the message sender) and holds it in a queue so that a consumer (the message receiver) can retrieve it. This allows for multiple producers and consumers to share the same queue without having to directly pass messages between each other. What RabbitMQ excels at is doing this at scale whilst staying lightweight and easy to deploy.
Connecting a .NET Application with MongoDB Atlas
You have probably heard of MongoDB, one of the most popular NoSQL databases today. In this article, we are going to create an application in .NET 6 and connect it to MongoDB Atlas simply and objectively. Something that is strictly linked to software development is databases, so software developers must be familiar with this subject. A database that has been standing out in recent years is MongoDB, which is a NoSQL database and has a valuable resource, the MongoDB Atlas.
ElasticSearch学习第二篇：.net core中使用ES
在上一篇文章《ElasticSearch学习第一篇：windows环境下安装使用》，我已经简单介绍了关于ES的安装部署及一些概念性的东西，还有一些简单的增删改查操作。本文主要也是做一些增删改查操作，不同的是，我们要通过代码来实现。 在.net客户端中，官网给我们提供了两个客户端Elasticsearch.Net和NEST Elasticsearch.Net是一个低级别、无依赖的客户端，它对您如何构建和表示您的请求和响应没有任何意见。它已经足够抽象，因此所有Elasticsearch API 端点都表示为方法，但不会太多妨碍您构建 json/request/response 对象的方式。它还带有内置的、可配置/可覆盖的集群故障转移重试机制。Elasticsearch 是有弹性的，那么为什么不是您的客户呢？ NEST是一个高级客户端，将所有请求和响应映射为类型，并带有一个强类型查询 DSL，它使用 Elasticsearch 查询 DSL 映射 1 到 1。它利用特定的 .NET 功能来提供更高级别的抽象，例如CLR 类型的自动映射。在内部，NEST...
Blazor Hybrid Web Apps with .NET MAUI
Microsoft has introduced the highly anticipated Blazor framework in ASP.NET Core 3.0. In .NET 5.0, Blazor received significant updates to its component model, plus speed improvements and pre-rendering capabilities. Blazor's initial focus was to allow developers to target the browser using the .NET stack with little or no JavaScript required, all without a single browser plug-in. The key to Blazor's success is its ability to enable .NET developers by leveraging their existing skills.
Create an Azure Face API Account
In this tutorial, we will build a Blazor application to interface with Azure Cognitive Services. We will upload an image to be processed, format and return the results to our UI, all in a Blazor application. This article is a sponsored article.
How to Handle Configuration for Multiple Environments in Console App Service?
@annakoptevaAnna Kopteva I work as a Software Engineer in MTS Digital on the SSO project. Love programming and corgi! Projects grow - sometimes faster than we expect. We know that manual work takes more time. I'll show how I automated the service deployment process after issues caused by adding the test environment. Our team has developed a service for processing messages from Kafka.
Microsoft Blazor Platz.SqlForms open-source - using Schema Builder to design and maintain SQL Server database
When you need to build a working prototype for your client or your company doesn't have a budget for enterprise development, you have no choice and you need to use some shortcuts and life hacks, usually low-code or no-code approaches. In this post, I present an interesting approach on how to develop a Blazor UI very quickly using the open-source library Platz.SqlForms.
The Differences Between Blazor WebAssembly And Blazor Server
If you are aware of the latest developments in .NET for the last couple of years, you must have heard the buzzword ‘Blazor’ quite often. It is a revolutionary client-end User Interface framework developed by Microsoft’s mighty ASP.NET Expert team. Since its launch, it has become a big talking point among the Tech Organizations and Developer community.
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