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configure.go
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configure.go
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package amqp
import (
"fmt"
"time"
amqp "github.com/rabbitmq/amqp091-go"
)
func (c *Client) Consumer(queueName, routingKey, exchangeName string, exclusive bool, dlExchange string) (err error) {
var channel *amqp.Channel
channel, err = c.createChannel()
if err != nil {
return err
}
defer func() {
err = closeChannel(err, channel)
}()
var args map[string]any
if len(dlExchange) != 0 {
args = map[string]any{
"x-dead-letter-exchange": dlExchange,
"x-dead-letter-routing-key": routingKey,
}
}
var queue amqp.Queue
queue, err = channel.QueueDeclare(queueName, true, false, exclusive, false, args)
if err != nil {
return fmt.Errorf("declare queue: %w", err)
}
if err = channel.QueueBind(queue.Name, routingKey, exchangeName, false, nil); err != nil {
return fmt.Errorf("bind queue `%s` to `%s`: %w", queue.Name, exchangeName, err)
}
return nil
}
func (c *Client) DelayedExchange(queueName, exchangeName, routingKey string, retryDelay time.Duration) (delayExchange string, err error) {
var channel *amqp.Channel
channel, err = c.createChannel()
if err != nil {
return "", err
}
defer func() {
err = closeChannel(err, channel)
}()
delayExchange = fmt.Sprintf("%s-delay", exchangeName)
if err = declareExchange(channel, delayExchange, "direct", nil); err != nil {
return "", fmt.Errorf("declare dead-letter exchange: %s", delayExchange)
}
delayQueue := fmt.Sprintf("%s-delay", queueName)
if _, err = channel.QueueDeclare(delayQueue, true, false, false, false, map[string]any{
"x-dead-letter-exchange": exchangeName,
"x-dead-letter-routing-key": routingKey,
"x-message-ttl": retryDelay.Milliseconds(),
}); err != nil {
return "", fmt.Errorf("declare dead-letter queue: %s", delayExchange)
}
if err = channel.QueueBind(delayQueue, routingKey, delayExchange, false, nil); err != nil {
return "", fmt.Errorf("bind dead-letter queue: %s", delayExchange)
}
return delayExchange, nil
}
func (c *Client) Publisher(exchangeName, exchangeType string, args amqp.Table) (err error) {
var channel *amqp.Channel
channel, err = c.createChannel()
if err != nil {
return err
}
defer func() {
err = closeChannel(err, channel)
}()
return declareExchange(channel, exchangeName, exchangeType, args)
}
func declareExchange(channel *amqp.Channel, exchangeName, exchangeType string, args amqp.Table) error {
if err := channel.ExchangeDeclare(exchangeName, exchangeType, true, false, false, false, args); err != nil {
return fmt.Errorf("declare exchange `%s`: %w", exchangeName, err)
}
return nil
}