mais otimizações 3.0

OpenCand.API/Program.cs

@@ -53,8 +53,7 @@ namespace OpenCand.API
 
             app.Run();
         }
-        
-        private static void SetupServices(WebApplicationBuilder builder)
+          private static void SetupServices(WebApplicationBuilder builder)
         {
             builder.Services.Configure<FotosSettings>(builder.Configuration.GetSection("FotosSettings"));
             builder.Services.AddMemoryCache();
@@ -67,6 +66,9 @@ namespace OpenCand.API
 
             builder.Services.AddScoped<OpenCandService>();
             builder.Services.AddScoped<EstatisticaService>();
+            
+            // Add cache preload background service
+            builder.Services.AddHostedService<CachePreloadService>();
         }
     }
 }

OpenCand.API/Services/CachePreloadService.cs

@@ -0,0 +1,96 @@
+using System;
+using Microsoft.Extensions.Logging;
+using OpenCand.API.Model;
+
+namespace OpenCand.API.Services
+{
+    public class CachePreloadService : BackgroundService
+    {
+        private readonly IServiceProvider serviceProvider;
+        private readonly ILogger<CachePreloadService> logger;
+
+        public CachePreloadService(IServiceProvider serviceProvider, ILogger<CachePreloadService> logger)
+        {
+            this.serviceProvider = serviceProvider;
+            this.logger = logger;
+        }
+
+        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+        {
+            // Wait a bit for the application to fully start up
+            await Task.Delay(5000, stoppingToken);
+            logger.LogInformation("Starting cache preload process...");
+
+            using var scope = serviceProvider.CreateScope();
+            var estatisticaService = scope.ServiceProvider.GetRequiredService<EstatisticaService>();
+            var openCandService = scope.ServiceProvider.GetRequiredService<OpenCandService>();
+
+            // First, preload single-call endpoints
+            await PreloadSingleEndpoints(estatisticaService, openCandService);
+
+            await PerformPreLoadEstatistica(estatisticaService);
+
+            logger.LogInformation("Cache preload process completed.");
+        }
+
+        private async Task PerformPreLoadEstatistica(EstatisticaService estatisticaService)
+        {
+            await PerformPreLoad("GetConfigurationModel", estatisticaService.GetConfigurationModel);
+
+            var types = new[] { "bem", "despesa", "receita" };
+            var groupByValues = new[] { "candidato", "partido", "uf", "cargo" };
+
+            logger.LogInformation($"Preloading cache with GetValueSum requests (3 types * 4 groupBy combinations)");
+
+            foreach (var type in types)
+            {
+                foreach (var groupBy in groupByValues)
+                {
+                    var request = new GetValueSumRequest
+                    {
+                        Type = type,
+                        GroupBy = groupBy,
+                        Filter = null // No filters as requested
+                    };
+
+                    logger.LogDebug($"Executing cache preload request: Type={type}, GroupBy={groupBy}");
+
+                    await PerformPreLoad("GetValueSum", () => estatisticaService.GetValueSum(request));
+                }
+            }
+        }
+
+        private async Task PreloadSingleEndpoints(EstatisticaService estatisticaService, OpenCandService openCandService)
+        {
+            logger.LogInformation("Preloading single-call endpoints...");
+
+            await PerformPreLoad("GetOpenCandStatsAsync", estatisticaService.GetMaioresEnriquecimentos);
+            await PerformPreLoad("GetOpenCandStatsAsync", openCandService.GetOpenCandStatsAsync);
+            await PerformPreLoad("GetDataAvailabilityStatsAsync", openCandService.GetDataAvailabilityStatsAsync);
+
+            logger.LogInformation("Single-call endpoints preload completed");
+        }
+
+        private async Task PerformPreLoad(string name, Func<Task> action)
+        {
+            try
+            {
+                logger.LogDebug($"Executing cache preload for {name}");
+
+                var startTime = DateTime.UtcNow;
+                await action();
+                var duration = DateTime.UtcNow - startTime;
+
+                logger.LogInformation($"Cache preload completed for {name}: Duration={duration.TotalMilliseconds}ms");
+            }
+            catch (Exception ex)
+            {
+                logger.LogError(ex, $"Failed to perform preload action for {name}");
+            }
+            finally
+            {
+                await Task.Delay(100); // Small delay to avoid overwhelming the database
+            }
+        }
+    }
+}