Add Worker background service to log periodic messages

Added a Worker class in EnvelopeGenerator.ServiceHost that logs an informational message every second. Registered the Worker as a hosted service in Program.cs to run alongside the web API.

EnvelopeGenerator.ServiceHost/EnvelopeGenerator.ServiceHost.csproj

@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.6.2" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Folder Include="Controllers\" />
+  </ItemGroup>
+
+</Project>

EnvelopeGenerator.ServiceHost/Program.cs

@@ -0,0 +1,29 @@
+using EnvelopeGenerator.ServiceHost;
+
+var builder = WebApplication.CreateBuilder(args);
+
+// Add services to the container.
+
+builder.Services.AddControllers();
+builder.Services.AddHostedService<Worker>();
+
+// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
+builder.Services.AddEndpointsApiExplorer();
+builder.Services.AddSwaggerGen();
+
+var app = builder.Build();
+
+// Configure the HTTP request pipeline.
+if (app.Environment.IsDevelopment())
+{
+    app.UseSwagger();
+    app.UseSwaggerUI();
+}
+
+app.UseHttpsRedirection();
+
+app.UseAuthorization();
+
+app.MapControllers();
+
+app.Run();

EnvelopeGenerator.ServiceHost/Properties/launchSettings.json

@@ -0,0 +1,41 @@
+{
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:27420",
+      "sslPort": 44372
+    }
+  },
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "launchUrl": "swagger",
+      "applicationUrl": "http://localhost:5088",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "https": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "launchUrl": "swagger",
+      "applicationUrl": "https://localhost:7234;http://localhost:5088",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "launchUrl": "swagger",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

EnvelopeGenerator.ServiceHost/Worker.cs

@@ -0,0 +1,23 @@
+namespace EnvelopeGenerator.ServiceHost;
+
+public class Worker : BackgroundService
+{
+    private readonly ILogger<Worker> _logger;
+
+    public Worker(ILogger<Worker> logger)
+    {
+        _logger = logger;
+    }
+
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            if (_logger.IsEnabled(LogLevel.Information))
+            {
+                _logger.LogInformation("Worker running at: {time}", DateTimeOffset.Now);
+            }
+            await Task.Delay(1000, stoppingToken);
+        }
+    }
+}

EnvelopeGenerator.ServiceHost/appsettings.Development.json

@@ -0,0 +1,8 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}

EnvelopeGenerator.ServiceHost/appsettings.json

@@ -0,0 +1,9 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*"
+}

EnvelopeGenerator.sln

@@ -35,6 +35,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EnvelopeGenerator.Tests", "
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EnvelopeGenerator.API", "EnvelopeGenerator.API\EnvelopeGenerator.API.csproj", "{EC768913-6270-14F4-1DD3-69C87A659462}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EnvelopeGenerator.ServiceHost", "EnvelopeGenerator.ServiceHost\EnvelopeGenerator.ServiceHost.csproj", "{5DD82482-E560-405F-BF55-04D647B05BEF}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -85,6 +87,10 @@ Global
 		{EC768913-6270-14F4-1DD3-69C87A659462}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{EC768913-6270-14F4-1DD3-69C87A659462}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{EC768913-6270-14F4-1DD3-69C87A659462}.Release|Any CPU.Build.0 = Release|Any CPU
+		{5DD82482-E560-405F-BF55-04D647B05BEF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{5DD82482-E560-405F-BF55-04D647B05BEF}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{5DD82482-E560-405F-BF55-04D647B05BEF}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{5DD82482-E560-405F-BF55-04D647B05BEF}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -104,6 +110,7 @@ Global
 		{211619F5-AE25-4BA5-A552-BACAFE0632D3} = {9943209E-1744-4944-B1BA-4F87FC1A0EEB}
 		{224C4845-1CDE-22B7-F3A9-1FF9297F70E8} = {0CBC2432-A561-4440-89BC-671B66A24146}
 		{EC768913-6270-14F4-1DD3-69C87A659462} = {E3C758DC-914D-4B7E-8457-0813F1FDB0CB}
+		{5DD82482-E560-405F-BF55-04D647B05BEF} = {E3C758DC-914D-4B7E-8457-0813F1FDB0CB}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {73E60370-756D-45AD-A19A-C40A02DACCC7}