GeoFeed/AS1024.GeoFeed.Core.GeoFeedLocalCache/GeoFeedSqliteLocalCache/GeoFeedCacheService.cs

using AS1024.GeoFeed.Core.Interfaces;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using System.Runtime.CompilerServices;

namespace AS1024.GeoFeed.Core.GeoFeedSqliteLocalCache
{
    public class GeoFeedCacheService : IHostedService
    {
        private readonly ILogger<GeoFeedCacheService> logger;
        private readonly IGeoFeedProvider feedProvider;
        private readonly IHost host;
        private readonly IGeoFeedPersistentCacheProvider persistentCacheProvider;

        public GeoFeedCacheService(ILogger<GeoFeedCacheService> logger,
        IGeoFeedProvider feedProvider,
        IHost host,
        IGeoFeedPersistentCacheProvider persistentCacheProvider)
        {
            this.logger = logger;
            this.feedProvider = feedProvider;
            this.host = host;
            this.persistentCacheProvider = persistentCacheProvider;
        }

        public Task StartAsync(CancellationToken cancellationToken)
        {
            _ = StartPerioidicSync(cancellationToken);
            return Task.CompletedTask;
        }

        public Task StopAsync(CancellationToken cancellationToken)
        {
            return Task.CompletedTask;
        }

        public async Task<bool> StartPerioidicSync(CancellationToken Token)
        {
            while (!Token.IsCancellationRequested)
            {
                try
                {
                    var results = await feedProvider.GetGeoFeedData();
                    await persistentCacheProvider.CacheGeoFeed(results);
                }
                catch (Exception)
                {
                    logger.LogWarning("On disk cache failed to run. Waiting on 30 minutes before retry...");
                }
                await Task.Delay(TimeSpan.FromMinutes(30));
            }

            return false;
        }
    }
}