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main.go
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main.go
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package main
import (
"bytes"
"context"
"encoding/gob"
"log"
"github.com/streadway/amqp"
"github.com/HETIC-MT-P2021/CQRSES_GROUP5/core/eventsourcing"
"github.com/HETIC-MT-P2021/CQRSES_GROUP5/helpers"
"github.com/HETIC-MT-P2021/CQRSES_GROUP5/models"
"github.com/HETIC-MT-P2021/CQRSES_GROUP5_CONSUMER/projector"
)
func main() {
conn, err := amqp.Dial("amqp://guest:guest@rabbitmq:5672/")
helpers.FailOnError(err, "Failed to connect to RabbitMQ")
if err != nil {
log.Fatalf("could not connect to rabbitmq: %v", err)
}
ch, err := conn.Channel()
if err != nil {
log.Fatalf("failed to open a channel: %v", err)
}
q, err := ch.QueueDeclare(
"events", // name
false, // durable
false, // delete when unused
false, // exclusive
false, // no-wait
nil, // arguments
)
if err != nil {
log.Fatalf("failed to declare queue: %v", err)
}
msgs, err := ch.Consume(
q.Name, // queue
"", // consumer
true, // auto-ack
false, // exclusive
false, // no-local
false, // no-wait
nil, // args
)
if err != nil {
log.Fatalf("failed to register a consumer: %v", err)
}
ctx := context.Background()
forever := make(chan bool)
go func() {
for d := range msgs {
//var order models.Order
buf := bytes.NewBuffer(d.Body)
dec := gob.NewDecoder(buf)
e := eventsourcing.Event{}
gob.Register(models.Order{})
gob.Register(models.OrderLine{})
if err := dec.Decode(&e); err != nil {
log.Fatal(err)
}
if err := projector.ProjectEvent(ctx, e); err != nil {
log.Fatalf("err on projecting event : %v", err)
}
}
}()
log.Printf(" [*] Waiting for event messages. To exit press CTRL+C")
<-forever
}