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Startup.cs
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Startup.cs
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using System.Linq;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Primitives;
using static ChangeTokenSample.Utilities.Utilities;
namespace ChangeTokenSample
{
public class Startup
{
private byte[] _appsettingsHash = new byte[20];
private byte[] _appsettingsEnvHash = new byte[20];
public void ConfigureServices(IServiceCollection services)
{
#region snippet1
services.AddSingleton<IConfigurationMonitor, ConfigurationMonitor>();
#endregion
#region snippet4
services.AddMemoryCache();
services.AddSingleton<FileService>();
#endregion
services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
}
public void Configure(IApplicationBuilder app, IConfiguration config, IHostingEnvironment env)
{
#region snippet2
ChangeToken.OnChange(
() => config.GetReloadToken(),
(state) => InvokeChanged(state),
env);
#endregion
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
else
{
app.UseExceptionHandler("/Error");
}
app.UseStaticFiles();
app.UseMvc();
}
#region snippet3
private void InvokeChanged(IHostingEnvironment env)
{
byte[] appsettingsHash = ComputeHash("appSettings.json");
byte[] appsettingsEnvHash =
ComputeHash($"appSettings.{env.EnvironmentName}.json");
if (!_appsettingsHash.SequenceEqual(appsettingsHash) ||
!_appsettingsEnvHash.SequenceEqual(appsettingsEnvHash))
{
_appsettingsHash = appsettingsHash;
_appsettingsEnvHash = appsettingsEnvHash;
WriteConsole("Configuration changed (Simple Startup Change Token)");
}
}
#endregion
}
}