DocSpace-client/common/ASC.Api.Core/Extensions/ServiceCollectionExtension.cs

using ASC.Common.Caching;
using ASC.Common.Logging;
using ASC.EventBus;
using ASC.EventBus.Abstractions;
using ASC.EventBus.RabbitMQ;

using Autofac;

using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Options;

using RabbitMQ.Client;

namespace ASC.Api.Core.Extensions
{
    public static class ServiceCollectionExtension
    {
        public static void AddEventBus(this IServiceCollection services)
        {
            services.AddSingleton<IRabbitMQPersistentConnection>(sp =>
            {
                var cfg = sp.GetRequiredService<IConfiguration>();
                var settings = cfg.GetSection("RabbitMQ").Get<RabbitMQSettings>();

                var logger = sp.GetRequiredService<IOptionsMonitor<ILog>>();

                var factory = new ConnectionFactory()
                {
                    HostName = settings.HostName,
                    DispatchConsumersAsync = true
                };

                if (!string.IsNullOrEmpty(settings.UserName))
                {
                    factory.UserName = settings.UserName;
                }

                if (!string.IsNullOrEmpty(settings.Password))
                {
                    factory.Password = settings.Password;
                }

                var retryCount = 5;

                if (!string.IsNullOrEmpty(cfg["core:eventBus:connectRetryCount"]))
                {
                    retryCount = int.Parse(cfg["core:eventBus:connectRetryCount"]);
                }

                return new DefaultRabbitMQPersistentConnection(factory, logger, retryCount);
            });

            services.AddSingleton<IEventBus, EventBusRabbitMQ>(sp =>
            {
                var cfg = sp.GetRequiredService<IConfiguration>();

                var rabbitMQPersistentConnection = sp.GetRequiredService<IRabbitMQPersistentConnection>();
                var iLifetimeScope = sp.GetRequiredService<ILifetimeScope>();
                var logger = sp.GetRequiredService<IOptionsMonitor<ILog>>();
                var eventBusSubcriptionsManager = sp.GetRequiredService<IEventBusSubscriptionsManager>();

                var subscriptionClientName = "backup";

                if (!string.IsNullOrEmpty(cfg["core:eventBus:subscriptionClientName"]))
                {
                    subscriptionClientName = cfg["core:eventBus:subscriptionClientName"];
                }

                var retryCount = 5;

                if (!string.IsNullOrEmpty(cfg["core:eventBus:connectRetryCount"]))
                {
                    retryCount = int.Parse(cfg["core:eventBus:connectRetryCount"]);
                }

                return new EventBusRabbitMQ(rabbitMQPersistentConnection, logger, iLifetimeScope, eventBusSubcriptionsManager, subscriptionClientName, retryCount);
            });

            services.AddSingleton<IEventBusSubscriptionsManager, InMemoryEventBusSubscriptionsManager>();
        }
    }

}