ESIM/EsimLao/Esim.SendMail/Program.cs

using Database.Database;
using Esim.SendMail.Jobs;
using Esim.SendMail.Services;
using Microsoft.EntityFrameworkCore;
using Quartz;

namespace Esim.SendMail;

public class Program
{
    private static readonly log4net.ILog log = log4net.LogManager.GetLogger(typeof(Program));

    public static async Task Main(string[] args)
    {
        // Configure log4net
        var logRepository = log4net.LogManager.GetRepository(System.Reflection.Assembly.GetEntryAssembly());
        log4net.Config.XmlConfigurator.Configure(logRepository, new FileInfo("log4net.config"));

        log.Info("===========================================");
        log.Info("Esim.SendMail Service Starting...");
        log.Info("===========================================");

        var builder = Host.CreateApplicationBuilder(args);

        // Add configuration
        builder.Configuration.AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);

        // Add DbContext
        var connectionString = builder.Configuration["Connection"];
        builder.Services.AddDbContext<ModelContext>(options =>
            options.UseOracle(connectionString));

        // Add Email Service as singleton for connection pooling
        builder.Services.AddSingleton<IEmailService, HighPerformanceEmailService>();

        // Configure Quartz
        var jobIntervalSeconds = int.Parse(builder.Configuration["Job:IntervalSeconds"] ?? "10");
        
        builder.Services.AddQuartz(q =>
        {
            q.UseMicrosoftDependencyInjectionJobFactory();

            var jobKey = new JobKey("MessageQueueJob");
            
            q.AddJob<MessageQueueJob>(opts => opts.WithIdentity(jobKey));
            
            q.AddTrigger(opts => opts
                .ForJob(jobKey)
                .WithIdentity("MessageQueueJob-trigger")
                .StartNow()
                .WithSimpleSchedule(x => x
                    .WithIntervalInSeconds(jobIntervalSeconds)
                    .RepeatForever()));
        });

        builder.Services.AddQuartzHostedService(q =>
        {
            q.WaitForJobsToComplete = true;
        });

        var host = builder.Build();

        log.Info($"Job interval: {jobIntervalSeconds} seconds");
        log.Info("Service started successfully. Press Ctrl+C to stop.");

        await host.RunAsync();
    }
}