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#update: handle rollback transaction
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,6 @@ | ||
| package message | ||
|
|
||
| type CancelOrderMessage struct { | ||
| OrderID string `json:"order_id"` | ||
| CancelStatus int `json:"cancel_status"` | ||
| } |
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121 changes: 121 additions & 0 deletions
121
internal/subscriber/cancelPurchase/purchase_cancel_orchestrator.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,121 @@ | ||
| package cancelPurchase | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "fmt" | ||
| "github.com/gofiber/fiber/v2/log" | ||
| amqp "github.com/rabbitmq/amqp091-go" | ||
| "latipe-transaction-service/config" | ||
| "latipe-transaction-service/internal/domain/message" | ||
| "latipe-transaction-service/internal/service/orderserv" | ||
| "sync" | ||
| "time" | ||
| ) | ||
|
|
||
| type PurchaseCancelOrchestratorSubscriber struct { | ||
| config *config.Config | ||
| orderServ orderserv.OrderService | ||
| conn *amqp.Connection | ||
| } | ||
|
|
||
| func NewPurchaseCancelOrchestratorSubscriber(cfg *config.Config, | ||
| orderServ orderserv.OrderService, conn *amqp.Connection) *PurchaseCancelOrchestratorSubscriber { | ||
| return &PurchaseCancelOrchestratorSubscriber{ | ||
| config: cfg, | ||
| orderServ: orderServ, | ||
| conn: conn, | ||
| } | ||
| } | ||
|
|
||
| func (orch PurchaseCancelOrchestratorSubscriber) ListenPurchaseCancel(wg *sync.WaitGroup) { | ||
| channel, err := orch.conn.Channel() | ||
| defer channel.Close() | ||
|
|
||
| // define an exchange type "topic" | ||
| err = channel.ExchangeDeclare( | ||
| orch.config.RabbitMQ.SagaOrderEvent.Exchange, | ||
| "topic", | ||
| true, | ||
| false, | ||
| false, | ||
| false, | ||
| nil, | ||
| ) | ||
| if err != nil { | ||
| log.Fatalf("cannot declare exchange: %v", err) | ||
| } | ||
|
|
||
| // create queue | ||
| q, err := channel.QueueDeclare( | ||
| "purchase_cancel_event", | ||
| true, | ||
| false, | ||
| false, | ||
| false, | ||
| nil, | ||
| ) | ||
| if err != nil { | ||
| log.Fatalf("cannot declare queue: %v", err) | ||
| } | ||
|
|
||
| err = channel.QueueBind( | ||
| q.Name, | ||
| orch.config.RabbitMQ.SagaOrderEvent.CancelRoutingKey, | ||
| orch.config.RabbitMQ.SagaOrderEvent.Exchange, | ||
| false, | ||
| nil) | ||
| if err != nil { | ||
| log.Fatalf("cannot bind exchange: %v", err) | ||
| } | ||
|
|
||
| // declaring consumer with its properties over channel opened | ||
| msgs, err := channel.Consume( | ||
| q.Name, // queue | ||
| orch.config.RabbitMQ.ServiceName, // consumer | ||
| true, // auto ack | ||
| false, // exclusive | ||
| false, // no local | ||
| false, // no wait | ||
| nil, //args | ||
| ) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| defer wg.Done() | ||
| // handle consumed messages from queue | ||
| for msg := range msgs { | ||
| log.Infof("received order message from: %s", msg.RoutingKey) | ||
| if err := orch.handleMessage(&msg); err != nil { | ||
| log.Infof("The order cancel failed cause %s", err) | ||
| } | ||
| } | ||
|
|
||
| log.Infof("message queue has started") | ||
| log.Infof("waiting for messages...") | ||
| } | ||
|
|
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| func (orch PurchaseCancelOrchestratorSubscriber) handleMessage(msg *amqp.Delivery) error { | ||
| startTime := time.Now() | ||
| ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second) | ||
| defer cancel() | ||
|
|
||
| messageDTO := message.CancelOrderMessage{} | ||
|
|
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| if err := json.Unmarshal(msg.Body, &messageDTO); err != nil { | ||
| log.Infof("Parse message to order failed cause: %s", err) | ||
| return err | ||
| } | ||
|
|
||
| err := orch.orderServ.CancelOrder(ctx, &messageDTO) | ||
| if err != nil { | ||
| log.Infof("Handling reply message was failed cause: %s", err) | ||
| return err | ||
| } | ||
|
|
||
| endTime := time.Now() | ||
| log.Infof("The orders [checkout_id: %v] was processed successfully - duration:%v", messageDTO.OrderID, endTime.Sub(startTime)) | ||
| fmt.Println() | ||
| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,20 @@ | ||
| package cancelPurchase | ||
|
|
||
| import ( | ||
| "latipe-transaction-service/config" | ||
| "latipe-transaction-service/internal/service/orderserv" | ||
| ) | ||
|
|
||
| func MappingRoutingKeyToService(routingKey string, config *config.Config) int { | ||
| switch routingKey { | ||
| case config.RabbitMQ.SagaOrderProductEvent.ReplyRoutingKey: | ||
| return orderserv.PRODUCT_SERVICE | ||
| case config.RabbitMQ.SagaOrderDeliveryEvent.ReplyRoutingKey: | ||
| return orderserv.DELIVERY_SERVICE | ||
| case config.RabbitMQ.SagaOrderPromotionEvent.ReplyRoutingKey: | ||
| return orderserv.PROMOTION_SERVICE | ||
| case config.RabbitMQ.SagaOrderPaymentEvent.ReplyRoutingKey: | ||
| return orderserv.PAYMENT_SERVICE | ||
| } | ||
| return -1 | ||
| } |
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