feat: enhance migration job processing with detailed metrics and error handling

cmd/go_migrate/main.go

@@ -36,7 +36,25 @@ func main() {
 	defer sourceDb.Close()
 	defer targetDb.Close()
 
-	processMigrationJobs(ctx, sourceDb, targetDb, migrationConfig.Jobs, migrationConfig.MaxParallelWorkers)
+	results := processMigrationJobs(ctx, sourceDb, targetDb, migrationConfig.Jobs, migrationConfig.MaxParallelWorkers)
+
+	log.Info("=== RESUMEN DE MIGRACIÓN ===")
+	var totalProcessed, totalErrors int64
+
+	for _, res := range results {
+		status := "OK"
+		if res.Error != nil {
+			status = "FAILED"
+		}
+		log.Infof("[%s] Status: %s | Read: %d | Loaded: %d | Errors: %d | Time: %v", res.JobName, status, res.RowsRead, res.RowsLoaded, res.RowsFailed, res.Duration)
+
+		totalProcessed += res.RowsLoaded
+		if res.Error != nil {
+			totalErrors++
+		}
+	}
+
+	log.Infof("Migración terminada. Tablas: %d, Errores: %d, Filas totales: %d", len(results), totalErrors, totalProcessed)
 
 	totalDuration := time.Since(startTime)
 	log.Infof("=== Migration completed successfully! ===")
@@ -49,10 +67,10 @@ func processMigrationJobs(
 	targetDb *pgxpool.Pool,
 	jobs []config.Job,
 	maxParallelWorkers int,
-) {
+) []JobResult {
 	if len(jobs) == 0 {
 		log.Info("No migration jobs configured")
-		return
+		return []JobResult{}
 	}
 
 	if maxParallelWorkers <= 0 {
@@ -65,6 +83,7 @@ func processMigrationJobs(
 
 	log.Infof("Starting migration with %d parallel worker(s)", maxParallelWorkers)
 
+	chJobResults := make(chan JobResult, len(jobs))
 	chJobs := make(chan config.Job, len(jobs))
 	var wgJobs sync.WaitGroup
 
@@ -72,7 +91,8 @@ func processMigrationJobs(
 		wgJobs.Go(func() {
 			for job := range chJobs {
 				log.Infof("[worker %d] >>> Processing job: %s.%s <<<", i, job.SourceTable.Schema, job.SourceTable.Table)
-				processMigrationJob(ctx, sourceDb, targetDb, job)
+				res := processMigrationJob(ctx, sourceDb, targetDb, job)
+				chJobResults <- res
 			}
 		})
 	}
@@ -80,8 +100,17 @@ func processMigrationJobs(
 	for _, job := range jobs {
 		chJobs <- job
 	}
-
 	close(chJobs)
 
-	wgJobs.Wait()
+	go func() {
+		wgJobs.Wait()
+		close(chJobResults)
+	}()
+
+	var finalResults []JobResult
+	for res := range chJobResults {
+		finalResults = append(finalResults, res)
+	}
+
+	return finalResults
 }