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我正在使用 azure 应用程序配置和 azure 功能。

所以我从 azure 应用程序配置中提取所有关键值。但是，如果 azure 函数正在运行并且我从 azure 应用程序配置中对键值进行任何更改，则 azure func 将不会显示更新的值。

下面是我已经实现的代码

在启动.cs

public override void Configure(IFunctionsHostBuilder builder)
        {
            var environmentName = Environment.GetEnvironmentVariable("AZURE_FUNCTIONS_ENVIRONMENT");
            if (string.IsNullOrWhiteSpace(environmentName))
                throw new Exception("AZURE_FUNCTIONS_ENVIRONMENT could not be resolved.");

            var hostEnvironment = new HostEnvironment { EnvironmentName = environmentName };
            var config = SetUpConfiguration(builder.Services, hostEnvironment);

            var appSettings = config.Get<TSettings>();
            appSettings.AppName = _appName;

            builder.Services.AddSingleton<ICorrelationIdProvider>(new FunctionAppCorrelationIdProvider());
            builder.Services.AddSingleton<IIdentityProvider>(new FunctionAppIdentityProvider(appSettings.AppName));
            builder.Services.AddSingleton<IHostEnvironment>(hostEnvironment);
            builder.Services.AddSingleton(appSettings);

}

    private IConfiguration SetUpConfiguration(IServiceCollection services, IHostEnvironment environment)
            {
                var executionContextOptions = services.BuildServiceProvider().GetService<IOptions<ExecutionContextOptions>>().Value;
                var configBuilder = new ConfigurationBuilder().Initialize(environment, executionContextOptions.AppDirectory);
                var config = configBuilder.Build();
                services.AddSingleton<IConfiguration>(new ConfigurationRoot(config.Providers.ToArray()));
                return config;
            }

在一个助手类中，我编写了以下代码

 builder.AddAzureAppConfiguration(appConfigurationOptions =>
            appConfigurationOptions
                .Connect(new Uri(config["AppConfig:Endpoint"]), tokenCredential)
                .Select(ConfigurationKeys.AZURE_FUNC_TEST)
                .Select(KeyFilter.Any, environment.EnvironmentName)
                .ConfigureRefresh(refreshOptions =>
                {                 
                    refreshOptions.Register(ConfigurationKeys.AZURE_FUNC_TEST, false);
                    refreshOptions.SetCacheExpiration(TimeSpan.FromMinutes(1));
                })
                
        );
        return builder;

在 azure 函数中，我使用下面的代码来获取值

var test = _settings.AzureFuncTest;

但是在这里我没有得到新的值，直到我不重新启动天蓝色的功能。

4

1 回答 1

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我已经更新了SetUpConfiguration问题中的方法，将代码包含在设置应用程序配置的辅助方法中。尽管问题不包括如何使用辅助方法，但以下代码将确保configurationRefresher已初始化。

private IConfiguration SetUpConfiguration(IServiceCollection services, IHostEnvironment environment)
{
    var executionContextOptions = services.BuildServiceProvider().GetService<IOptions<ExecutionContextOptions>>().Value;
    var configBuilder = new ConfigurationBuilder().Initialize(environment, executionContextOptions.AppDirectory);
    IConfigurationRefresher configurationRefresher = null;
    TokenCredential tokenCredential = new DefaultAzureCredential();

    configBuilder.AddAzureAppConfiguration(appConfigurationOptions =>
    {
        var settings = configBuilder.Build();

        appConfigurationOptions
            .Connect(new Uri(settings["AppConfig:Endpoint"]), tokenCredential)
            .Select(ConfigurationKeys.AZURE_FUNC_TEST)
            .Select(KeyFilter.Any, environment.EnvironmentName)
            .ConfigureRefresh(refreshOptions =>
            {
                refreshOptions.Register(ConfigurationKeys.AZURE_FUNC_TEST, false);
                refreshOptions.SetCacheExpiration(TimeSpan.FromMinutes(1));
            });

        configurationRefresher = appConfigurationOptions.GetRefresher();
    });

    var configuration = configBuilder.Build();
    services.AddSingleton(configurationRefresher);
    services.AddSingleton<IConfiguration>(configuration);

    return configuration;
}

此外，该语句var appSettings = config.Get<TSettings>()将在此时创建设置的副本，并且预计不会反映IConfiguration实例的更改。为了能够看到最新的设置，请按照这里IOptionsMonitor<T>的描述使用。

于 2020-11-03T20:30:28.093 回答