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exchange.go
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exchange.go
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/*
Copyright 2021 The Knative Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package resources
import (
"net/url"
corev1 "k8s.io/api/core/v1"
"github.com/NeowayLabs/wabbit"
"github.com/streadway/amqp"
dialer "knative.dev/eventing-rabbitmq/pkg/amqp"
naming "knative.dev/eventing-rabbitmq/pkg/rabbitmqnaming"
"knative.dev/eventing-rabbitmq/pkg/reconciler/io"
eventingv1 "knative.dev/eventing/pkg/apis/eventing/v1"
)
// ExchangeArgs are the arguments to create a RabbitMQ Exchange.
type ExchangeArgs struct {
Broker *eventingv1.Broker
Trigger *eventingv1.Trigger
RabbitMQURL *url.URL
RabbitMQCluster string
// Set to true to create a DLX, which basically just means we're going
// to create it with a /DLX as the prepended name.
DLX bool
}
// DeclareExchange declares the Exchange for a Broker.
func DeclareExchange(dialerFunc dialer.DialerFunc, args *ExchangeArgs) (*corev1.Secret, error) {
conn, err := dialerFunc(args.RabbitMQURL.String())
if err != nil {
return nil, err
}
defer io.CloseAmqpResourceAndExitOnError(conn)
channel, err := conn.Channel()
if err != nil {
return nil, err
}
defer io.CloseAmqpResourceAndExitOnError(channel)
var exchangeName string
if args.Trigger != nil {
exchangeName = naming.TriggerDLXExchangeName(args.Trigger)
} else {
exchangeName = naming.BrokerExchangeName(args.Broker, args.DLX)
}
return MakeSecret(args), channel.ExchangeDeclare(
exchangeName,
"headers", // kind
wabbit.Option{
"durable": true,
"autoDelete": false,
"internal": false,
"noWait": false,
},
)
}
// DeleteExchange deletes the Exchange for a Broker.
func DeleteExchange(args *ExchangeArgs) error {
conn, err := amqp.Dial(args.RabbitMQURL.String())
if err != nil {
return err
}
defer io.CloseAmqpResourceAndExitOnError(conn)
channel, err := conn.Channel()
if err != nil {
return err
}
defer io.CloseAmqpResourceAndExitOnError(channel)
var exchangeName string
if args.Trigger != nil {
exchangeName = naming.TriggerDLXExchangeName(args.Trigger)
} else {
exchangeName = naming.BrokerExchangeName(args.Broker, args.DLX)
}
return channel.ExchangeDelete(
exchangeName,
false, // if-unused
false, // nowait
)
}