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main.go
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main.go
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/*
Copyright 2020 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 main
import (
"fmt"
"log"
"time"
amqp "github.com/rabbitmq/amqp091-go"
"github.com/kelseyhightower/envconfig"
)
type envConfig struct {
Username string `envconfig:"USER" required:"true"`
Password string `envconfig:"PASSWORD" required:"true"`
Broker string `envconfig:"RABBITBROKER" required:"true"`
Count int `envconfig:"COUNT" default:"1"`
UseTLS int `envconfig:"USE_TLS" default:"0"`
Vhost string `envconfig:"VHOST"`
}
func failOnError(err error, msg string) {
if err != nil {
log.Fatalf("%s: %s", msg, err)
}
}
func main() {
var env envConfig
if err := envconfig.Process("", &env); err != nil {
log.Fatal("[ERROR] Failed to process env var: ", err)
}
var connStr string
if env.UseTLS == 1 {
log.Default().Println("Using TLS")
connStr = fmt.Sprintf("amqps://%s:%s@%s:5671/%s", env.Username, env.Password, env.Broker, env.Vhost)
} else {
connStr = fmt.Sprintf("amqp://%s:%s@%s:5672/%s", env.Username, env.Password, env.Broker, env.Vhost)
}
time.Sleep(1 * time.Minute)
conn, err := amqp.Dial(connStr)
failOnError(err, "Failed to connect to RabbitMQ")
defer conn.Close()
ch, err := conn.Channel()
failOnError(err, "Failed to open a channel")
defer ch.Close()
err = ch.ExchangeDeclare(
"logs", // name
"headers", // type
true, // durable
false, // auto-deleted
false, // internal
false, // no-wait
nil, // arguments
)
failOnError(err, "Failed to declare an exchange")
var body, contentType string
var headers amqp.Table
for i := 0; i < env.Count; i++ {
switch i % 3 {
case 0:
contentType = "application/json"
headers = amqp.Table{
"ce-specversion": "1.0",
"ce-id": i,
"ce-type": "knative.producer.e2etest",
"ce-source": "example/source.uri",
"ce-datacontenttype": "application/json; charset=UTF-8",
}
body = `{ "message": "Hello, BinCEWorld!" }`
case 1:
contentType = "application/cloudevents+json"
headers = amqp.Table{}
body = fmt.Sprintf(`{
"id": "%d",
"type": "knative.producer.e2etest",
"source": "example/source.uri",
"data": "Hello, CEWorld!",
"specversion": "1.0",
"datacontenttype": "text/plain"
}`, i)
case 2:
contentType = "text/plain"
headers = amqp.Table{}
body = fmt.Sprintf(`{ "id": "%d", "message": "Hello, World!" }`, i)
}
err = ch.Publish(
"logs", // exchange
"", // routing key
false, // mandatory
false, // immediate
amqp.Publishing{
ContentType: contentType,
Body: []byte(body),
Headers: headers,
})
failOnError(err, "Failed to publish a message")
log.Printf(" [x] Sent %s", body)
time.Sleep(50 * time.Millisecond)
}
}