Aggiunta documentazione RedisCache

Author: AngeloDotNet

src/NET6CustomLibrary/Docs/README-RedisCache.md

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+# RedisCache configuration
+
+
+## Configuration to add to the appsettings.json file
+
+```json
+"ConnectionStrings": {
+  "Redis": "localhost:6379"
+},
+"Redis": {
+  "InstanceName": "RedisCache_",
+  "AbsoluteExpireTime": 60, // in minutes
+  "SlidingExpireTime": 15 // in minutes
+}
+```
+
+
+## Registering services at Startup
+
+```csharp
+public Startup(IConfiguration configuration)
+{
+  Configuration = configuration;
+}
+
+public IConfiguration Configuration { get; }
+	
+public void ConfigureServices(IServiceCollection services)
+{
+  services.AddRedisCacheService(Configuration);
+}
+```
+
+
+## Example of use in a web api controller
+```csharp
+[ApiController]
+[Route("api/[controller]")]
+public class ExampleController : ControllerBase
+{
+  private readonly MyService myService;
+  private readonly ICacheService cacheService;
+
+  public EmailController(MyService myService, ICacheService cacheService)
+  {
+    this.cacheService = cacheService;
+    this.myService = myService;
+  }
+  
+  [HttpGet]
+  public async Task<List<MyListType>> GetMyListTypeAsync()
+  {
+    logger.LogInformation("GetMyListType");
+
+    var cache = cacheService.GetCache<List<MyListType>>("ListType");
+
+    if (cache != null)
+    {
+        return cache;
+    }
+    else
+    {
+        var result = await myService.GetMyListTypeAsync();
+        return cacheService.SetCache("ListType", result);
+    }
+  }
+}
+```