/
repository.go
77 lines (66 loc) · 2.08 KB
/
repository.go
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package products
import (
"time"
"github.com/google/uuid"
"github.com/opentracing/opentracing-go"
"github.com/opentracing/opentracing-go/ext"
"github.com/opentracing/opentracing-go/log"
"golang.org/x/net/context"
"gorm.io/gorm"
)
// Repository is the interface that describes a product repository
// object.
type Repository interface {
SaveProduct(ctx context.Context, product *Product) error
GetProductBySKU(ctx context.Context, sku string) (*Product, error)
}
// ProductRepo is the default implementation for Repository inteface.
type ProductRepo struct {
db *gorm.DB
tracer opentracing.Tracer
}
// NewRepository returns a new product repository object.
func NewRepository(db *gorm.DB, tracer opentracing.Tracer) *ProductRepo {
return &ProductRepo{
db: db,
tracer: tracer,
}
}
func (r *ProductRepo) setMySqlComponentTags(span opentracing.Span, tableName string) {
ext.DBInstance.Set(span, tableName)
ext.DBType.Set(span, "mysql")
ext.SpanKindRPCClient.Set(span)
}
// SaveProduct saves a new product to the database.
func (r *ProductRepo) SaveProduct(ctx context.Context, product *Product) error {
product.Sku = uuid.NewString()
product.TimeAdded = time.Now()
span, _ := opentracing.StartSpanFromContextWithTracer(ctx, r.tracer, "SaveProduct")
defer span.Finish()
r.setMySqlComponentTags(span, "products")
span.LogFields(
log.Object("param.product", product),
)
err := r.db.Create(product).Error
if err != nil {
ext.Error.Set(span, true)
span.LogFields(log.Error(err), log.Event("gorm.db.Create"))
return err
}
return nil
}
func (r *ProductRepo) GetProductBySKU(ctx context.Context, sku string) (*Product, error) {
span, _ := opentracing.StartSpanFromContextWithTracer(ctx, r.tracer, "GetProductBySKU")
defer span.Finish()
r.setMySqlComponentTags(span, "products")
span.SetTag("param.sku", sku)
product := &Product{}
err := r.db.Where("sku = ?", sku).First(product).Error
if err != nil {
ext.Error.Set(span, true)
span.LogFields(log.Error(err), log.Event("gorm.db.Where.First"))
return nil, err
}
span.SetTag("response.product", product)
return product, nil
}