implement a beer rating sample app to demonstrate distributed counter…

…s in RavenDB

.gitignore

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+[Bb]in
+[Oo]bj
+.vs/

BeerRatingApp.Server/Beer.cs

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+public class Beer
+{
+    public string Id { get; set; }
+    public string Name { get; set; }
+    public string ImageUrl { get; set; }
+    public string Style { get; set; }
+
+}

BeerRatingApp.Server/BeerRatingApp.Server.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <SpaRoot>..\beerratingapp.client</SpaRoot>
+    <SpaProxyLaunchCommand>npm run dev</SpaProxyLaunchCommand>
+    <SpaProxyServerUrl>https://localhost:5173</SpaProxyServerUrl>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.SpaProxy">
+      <Version>8.*-*</Version>
+    </PackageReference>
+    <PackageReference Include="RavenDB.Client" Version="6.0.104" />
+    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.4.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\beerratingapp.client\BeerRatingApp.client.esproj">
+      <ReferenceOutputAssembly>false</ReferenceOutputAssembly>
+    </ProjectReference>
+  </ItemGroup>
+
+</Project>

BeerRatingApp.Server/BeerRatingApp.Server.csproj.user

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+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <ActiveDebugProfile>https</ActiveDebugProfile>
+  </PropertyGroup>
+</Project>

BeerRatingApp.Server/BeerRatingApp.Server.http

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+@BeerRatingApp.Server_HostAddress = http://localhost:5234
+
+GET {{BeerRatingApp.Server_HostAddress}}/beers/
+Accept: application/json
+
+###

BeerRatingApp.Server/Controllers/BeersController.cs

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+using Microsoft.AspNetCore.Mvc;
+using Raven.Client.Documents;
+
+namespace BeerRatingApp.Server.Controllers
+{
+    [ApiController]
+    [Route("[controller]")]
+    public class BeersController : ControllerBase
+    {
+        private readonly IDocumentStore _documentStore;
+
+        public BeersController(IDocumentStore documentStore)
+        {
+            _documentStore = documentStore;
+        }
+
+        [HttpGet]
+        public async Task<IEnumerable<Beer>> Get()
+        {
+            // return all beer documents
+            using var session = _documentStore.OpenAsyncSession();
+            var beers = await session.Query<Beer>().ToListAsync();
+
+            return beers;
+        }
+
+        [HttpPost("{id}/rate")]
+        public async Task<decimal?> Rate(string id, [FromBody] int rating)
+        {
+            if (rating is <= 0 or > 5)
+                throw new InvalidOperationException("rating must be a number between 1 and 5");
+
+            id = Uri.UnescapeDataString(id);
+
+            using var session = _documentStore.OpenAsyncSession();
+
+            // increment the counter corresponding to the rating
+            session.CountersFor(id).Increment(rating.ToString());
+            await session.SaveChangesAsync();
+
+            // return current rating
+            var currentRating = await GetRating(id);
+            return currentRating;
+        }
+
+        [HttpGet("{id}/rating")]
+        public async Task<decimal?> GetRating(string id)
+        {
+            id = Uri.UnescapeDataString(id);
+
+            // get all counters for this beer document
+            using var session = _documentStore.OpenAsyncSession();
+            var ratings = await session.CountersFor(id).GetAllAsync();
+
+            // if it has no counters, rating is 0 
+            if (ratings.Count == 0)
+                return 0;
+
+            // sum the product of each score and its corresponding count, 
+            // then divide by the total number of ratings
+            var numberOfVotes = ratings.Values.Sum();
+            long? sum = 0;
+            foreach (var kvp in ratings)
+            {
+                if (int.TryParse(kvp.Key, out var score) == false ||
+                    score is <= 0 or > 5)
+                    continue;
+
+
+                sum += kvp.Value * score;
+            }
+
+            var avg = (decimal)sum!/numberOfVotes;
+            return avg;
+        }
+    }
+}

BeerRatingApp.Server/Program.cs

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+using Raven.Client.Documents;
+
+var builder = WebApplication.CreateBuilder(args);
+
+// Add services to the container.
+builder.Services.AddControllers();
+builder.Services.AddSwaggerGen();
+
+// Configure RavenDB
+var store = new DocumentStore
+{
+    Urls = new[] { "http://localhost:8080" },
+    Database = "BeerRatingApp"
+};
+store.Initialize();
+builder.Services.AddSingleton<IDocumentStore>(store);
+
+var app = builder.Build();
+
+if (app.Environment.IsDevelopment())
+{
+    app.UseSwagger();
+    app.UseSwaggerUI();
+}
+
+app.UseHttpsRedirection();
+app.UseStaticFiles();
+
+app.UseRouting();
+app.UseAuthorization();
+app.MapControllers();
+
+app.Run();

BeerRatingApp.Server/Properties/launchSettings.json

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+{
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:13550",
+      "sslPort": 44344
+    }
+  },
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "launchUrl": "swagger",
+      "applicationUrl": "http://localhost:5234",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development",
+        "ASPNETCORE_HOSTINGSTARTUPASSEMBLIES": "Microsoft.AspNetCore.SpaProxy"
+      }
+    },
+    "https": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "launchUrl": "swagger",
+      "applicationUrl": "https://localhost:7123;http://localhost:5234",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development",
+        "ASPNETCORE_HOSTINGSTARTUPASSEMBLIES": "Microsoft.AspNetCore.SpaProxy"
+      }
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "launchUrl": "swagger",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development",
+        "ASPNETCORE_HOSTINGSTARTUPASSEMBLIES": "Microsoft.AspNetCore.SpaProxy"
+      }
+    }
+  }
+}
+

BeerRatingApp.Server/appsettings.Development.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}

BeerRatingApp.Server/appsettings.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*"
+}

README.md

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+# samples-aspnet-distributed-counters

beerratingapp.client/.eslintrc.cjs

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+module.exports = {
+  root: true,
+  env: { browser: true, es2020: true },
+  extends: [
+    'eslint:recommended',
+    'plugin:react/recommended',
+    'plugin:react/jsx-runtime',
+    'plugin:react-hooks/recommended',
+  ],
+  ignorePatterns: ['dist', '.eslintrc.cjs'],
+  parserOptions: { ecmaVersion: 'latest', sourceType: 'module' },
+  settings: { react: { version: '18.2' } },
+  plugins: ['react-refresh'],
+  rules: {
+    'react/jsx-no-target-blank': 'off',
+    'react-refresh/only-export-components': [
+      'warn',
+      { allowConstantExport: true },
+    ],
+  },
+}

beerratingapp.client/.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?

beerratingapp.client/README.md

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+# React + Vite
+
+This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
+
+Currently, two official plugins are available:
+
+- [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react/README.md) uses [Babel](https://babeljs.io/) for Fast Refresh
+- [@vitejs/plugin-react-swc](https://github.com/vitejs/vite-plugin-react-swc) uses [SWC](https://swc.rs/) for Fast Refresh

beerratingapp.client/beerratingapp.client.esproj

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+<Project Sdk="Microsoft.VisualStudio.JavaScript.Sdk/0.5.128-alpha">
+  <PropertyGroup>
+    <StartupCommand>npm run dev</StartupCommand>
+    <JavaScriptTestRoot>src\</JavaScriptTestRoot>
+    <JavaScriptTestFramework>Jest</JavaScriptTestFramework>
+    <!-- Allows the build (or compile) script located on package.json to run on Build -->
+    <ShouldRunBuildScript>false</ShouldRunBuildScript>
+    <!-- Folder where production build objects will be placed -->
+    <PublishAssetsDirectory>$(MSBuildProjectDirectory)\dist</PublishAssetsDirectory>
+  </PropertyGroup>
+</Project>

beerratingapp.client/index.html

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+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/vite.svg" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Vite + React</title>
+  </head>
+  <body>
+    <div id="root"></div>
+    <script type="module" src="/src/main.jsx"></script>
+  </body>
+</html>

beerratingapp.client/nuget.config

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+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <packageSources>
+    <clear />
+    <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
+  </packageSources>
+  <disabledPackageSources>
+    <clear />
+  </disabledPackageSources>
+</configuration>