Question

我有一个xamarin android应用，它向.net核心（在Windows Server的IIS上）托管的api发出请求。初始请求总是要花很长时间加载（可能是由于某些预热过程）。如何确保在用户需要发出请求时API已准备就绪？

我是否仅在应用启动时发出快速异步获取/发布请求？这似乎效率不高...

Answer 1

您需要对API使用运行状况检查：

public class ExampleHealthCheck : IHealthCheck
{
    public ExampleHealthCheck()
    {
        // Use dependency injection (DI) to supply any required services to the
        // "warmed up" check.
    }

    public Task<HealthCheckResult> CheckHealthAsync(
    HealthCheckContext context, 
         CancellationToken cancellationToken = default(CancellationToken))
    {
        // Execute "warmed up" check logic here.

        var healthCheckResultHealthy = true;

        if (healthCheckResultHealthy)
        {
            return Task.FromResult(
            HealthCheckResult.Healthy("The check indicates a healthy result."));
        }

        return Task.FromResult(
        HealthCheckResult.Unhealthy("The check indicates an unhealthy result."));
    }
}

将您的服务添加到健康检查服务中：

public void ConfigureServices(IServiceCollection services)
{
    services.AddHealthChecks()
        .AddCheck<ExampleHealthCheck>("example_health_check");
}

在Startup.Configure中，使用端点URL在处理管道中调用UseHealthChecks：

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    app.UseHealthChecks("/health");
}

文档链接：https://docs.microsoft.com/ru-ru/aspnet/core/host-and-deploy/health-checks?view=aspnetcore-2.2

如何确保在首次请求之前“预热” API？

1 个答案: