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|
package amqp
import (
"fmt"
"github.com/google/uuid"
"github.com/streadway/amqp"
)
func (j *JobsConsumer) initRabbitMQ() (<-chan amqp.Delivery, error) {
// Channel opens a unique, concurrent server channel to process the bulk of AMQP
// messages. Any error from methods on this receiver will render the receiver
// invalid and a new Channel should be opened.
channel, err := j.conn.Channel()
if err != nil {
return nil, err
}
err = channel.Qos(j.prefetchCount, 0, false)
if err != nil {
return nil, err
}
// declare an exchange (idempotent operation)
err = channel.ExchangeDeclare(
j.exchangeName,
j.exchangeType,
true,
false,
false,
false,
nil,
)
if err != nil {
return nil, err
}
// verify or declare a queue
q, err := channel.QueueDeclare(
fmt.Sprintf("%s.%s", j.routingKey, uuid.NewString()),
false,
false,
true,
false,
nil,
)
if err != nil {
return nil, err
}
// bind queue to the exchange
err = channel.QueueBind(
q.Name,
j.routingKey,
j.exchangeName,
false,
nil,
)
if err != nil {
return nil, err
}
// start reading messages from the channel
deliv, err := channel.Consume(
q.Name,
"",
false,
false,
false,
false,
nil,
)
if err != nil {
return nil, err
}
return deliv, nil
}
func (j *JobsConsumer) listener(deliv <-chan amqp.Delivery) {
go func() {
for {
select {
case msg, ok := <-deliv:
if !ok {
j.logger.Info("delivery channel closed, leaving the rabbit listener")
return
}
// add task to the queue
j.pq.Insert(From(msg))
case <-j.stop:
return
}
}
}()
}
|
