DD.WellWorkover.Cloud/AsbCloudInfrastructure/Startup.cs

using AsbCloudDb.Model;
using AsbCloudInfrastructure.Services.DetectOperations;
using AsbCloudInfrastructure.Services;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using System;
using System.Threading.Tasks;
using System.Threading;
using AsbCloudInfrastructure.Background;
using AsbCloudApp.Data.SAUB;
using AsbCloudDb;
using AsbCloudApp.Repositories;
using AsbCloudInfrastructure.Background.PeriodicWorks;

namespace AsbCloudInfrastructure;

public class Startup
{
    public static void BeforeRunHandler(IHost host)
    {
        using var scope = host.Services.CreateScope();
        var provider = scope.ServiceProvider;

        var context = provider.GetRequiredService<IAsbCloudDbContext>();
        context.Database.EnsureCreatedAndMigrated();

        // TODO: Сделать инициализацию кеша телеметрии более явной.
        _ = provider.GetRequiredService<ITelemetryDataCache<TelemetryDataSaubDto>>();
        _ = provider.GetRequiredService<ITelemetryDataCache<TelemetryDataSpinDto>>();

        var backgroundWorker = provider.GetRequiredService<PeriodicBackgroundWorker>();
        backgroundWorker.Add<WorkToDeleteOldReports>(TimeSpan.FromDays(1));
        backgroundWorker.Add<WellInfoService.WorkWellInfoUpdate>(TimeSpan.FromMinutes(30));
        backgroundWorker.Add<WorkOperationDetection>(TimeSpan.FromMinutes(0));
        backgroundWorker.Add<WorkDataSaubStat>(TimeSpan.FromMinutes(0));
        backgroundWorker.Add<WorkLimitingParameterCalc>(TimeSpan.FromMinutes(0));
        backgroundWorker.Add(MakeMemoryMonitoringWork(), TimeSpan.FromMinutes(0));

        var notificationBackgroundWorker = provider.GetRequiredService<NotificationBackgroundWorker>();
    }

    static Work MakeMemoryMonitoringWork()
    {
        var workAction = (string _, IServiceProvider _, Action<string, double?> _, CancellationToken _) => {
            var bytes = GC.GetTotalMemory(false);
            var bytesString = FromatBytes(bytes);
            System.Diagnostics.Trace.TraceInformation($"Total memory allocated is {bytesString} bytes. DbContext count is:{AsbCloudDbContext.ReferenceCount}");
            return Task.CompletedTask;
        };
        var work = Work.CreateByDelegate("Memory monitoring", workAction);
        return work;
    }

    static string FromatBytes(long bytes)
    {
        const double gigaByte = 1024 * 1024 * 1024;
        const double megaByte = 1024 * 1024;
        const double kiloByte = 1024;
        
        if (bytes > 10 * gigaByte)
            return (bytes / gigaByte).ToString("### ### ###.## Gb");

        if (bytes > 10 * megaByte)
            return (bytes / megaByte).ToString("### ### ###.## Mb");

        if (bytes > 10 * kiloByte)
            return (bytes / megaByte).ToString("### ### ###.## Kb");

        return bytes.ToString("### ### ###");
    }
}