refactor: rename Batch to Partition in error handling and processing functions for consistency

internal/app/etl/transformers/mssql.go

@@ -60,15 +60,15 @@ func computeTransformationPlan(columns []models.ColumnType) []etl.ColumnTransfor
 	return plan
 }
 
-const processChunkCtxCheck = 4096
+const processBatchCtxCheck = 4096
 
-func (mssqlTr *MssqlTransformer) ProcessChunk(
+func (mssqlTr *MssqlTransformer) ProcessBatch(
 	ctx context.Context,
-	chunk *models.Batch,
+	batch *models.Batch,
 	transformationPlan []etl.ColumnTransformPlan,
 ) error {
-	for i, rowValues := range chunk.Data {
-		if i%processChunkCtxCheck == 0 {
+	for i, rowValues := range batch.Rows {
+		if i%processBatchCtxCheck == 0 {
 			if err := ctx.Err(); err != nil {
 				return err
 			}
@@ -94,10 +94,10 @@ func (mssqlTr *MssqlTransformer) ProcessChunk(
 func (mssqlTr *MssqlTransformer) Exec(
 	ctx context.Context,
 	columns []models.ColumnType,
-	chChunksIn <-chan models.Batch,
-	chChunksOut chan<- models.Batch,
+	chBatchesIn <-chan models.Batch,
+	chBatchesOut chan<- models.Batch,
 	chJobErrorsOut chan<- custom_errors.JobError,
-	wgActiveChunks *sync.WaitGroup,
+	wgActiveBatches *sync.WaitGroup,
 ) {
 	transformationPlan := computeTransformationPlan(columns)
 
@@ -110,22 +110,22 @@ func (mssqlTr *MssqlTransformer) Exec(
 		case <-ctx.Done():
 			return
 
-		case chunk, ok := <-chChunksIn:
+		case batch, ok := <-chBatchesIn:
 			if !ok {
 				return
 			}
 
 			if len(transformationPlan) == 0 {
 				select {
-				case chChunksOut <- chunk:
-					wgActiveChunks.Add(1)
+				case chBatchesOut <- batch:
+					wgActiveBatches.Add(1)
 					continue
 				case <-ctx.Done():
 					return
 				}
 			}
 
-			err := mssqlTr.ProcessChunk(ctx, &chunk, transformationPlan)
+			err := mssqlTr.ProcessBatch(ctx, &batch, transformationPlan)
 			if err != nil {
 				if errors.Is(err, ctx.Err()) {
 					return
@@ -139,12 +139,12 @@ func (mssqlTr *MssqlTransformer) Exec(
 			}
 
 			select {
-			case chChunksOut <- chunk:
+			case chBatchesOut <- batch:
 			case <-ctx.Done():
 				return
 			}
 
-			wgActiveChunks.Add(1)
+			wgActiveBatches.Add(1)
 		}
 	}
 }