84 lines
2.3 KiB
Go
84 lines
2.3 KiB
Go
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package service
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import (
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"context"
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"errors"
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"fmt"
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"time"
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fwingestion "github.com/yourorg/go-dw-platform/framework/ingestion"
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fwmetrics "github.com/yourorg/go-dw-platform/framework/metrics"
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"github.com/yourorg/go-dw-platform/services/template-service/domain"
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"github.com/yourorg/go-dw-platform/services/template-service/dto"
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"github.com/yourorg/go-dw-platform/services/template-service/entity"
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"github.com/yourorg/go-dw-platform/services/template-service/repository"
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"github.com/yourorg/go-dw-platform/services/template-service/transformer"
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)
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var ErrDuplicate = errors.New("duplicate order")
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type Service struct {
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repository *repository.Repository
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transformer *transformer.Transformer
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batcher *fwingestion.Batcher[*domain.Order]
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retrier *fwingestion.Retrier
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}
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func New(repo *repository.Repository, tf *transformer.Transformer, batchSize int, batchTimeout time.Duration, maxRetries int, retryDelay time.Duration) *Service {
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return &Service{
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repository: repo,
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transformer: tf,
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batcher: fwingestion.NewBatcher[*domain.Order](batchSize, batchTimeout),
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retrier: fwingestion.NewRetrier(maxRetries, retryDelay),
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}
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}
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func (s *Service) Process(ctx context.Context, req *dto.IngestRequest) (*dto.ProcessResult, error) {
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order, err := s.transformer.RequestToDomain(req)
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if err != nil {
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return nil, fmt.Errorf("process: %w", err)
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}
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exists, err := s.repository.ExistsByKey(ctx, order.NaturalKey())
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if err != nil {
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return nil, fmt.Errorf("check duplicate: %w", err)
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}
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if exists {
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return nil, ErrDuplicate
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}
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s.batcher.Add(order)
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if s.batcher.IsFull() || s.batcher.IsExpired() {
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return s.FlushBatch(ctx)
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}
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return &dto.ProcessResult{Status: "queued"}, nil
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}
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func (s *Service) FlushBatch(ctx context.Context) (*dto.ProcessResult, error) {
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start := time.Now()
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batch := s.batcher.Get()
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entities := make([]*entity.Order, len(batch))
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for i, d := range batch {
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entities[i] = s.transformer.DomainToEntity(d)
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}
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rows, err := s.retrier.Do(ctx, func() (int64, error) {
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return s.repository.InsertBatch(ctx, entities)
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})
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if err != nil {
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return nil, fmt.Errorf("flush batch: %w", err)
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}
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fwmetrics.RecordBatchInsert(len(batch), time.Since(start))
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s.batcher.Clear()
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return &dto.ProcessResult{
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Status: "success",
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RowsInserted: rows,
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}, nil
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}
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