SendMessagev2
SendMessagev2.go
This example sends a message to an Amazon SQS queue.
go run SendMessagev2.go -q QUEUE-NAME
- QUEUE-NAME is the name of the queue to which the message is sent.
The unit test accepts a similar value in config.json.
Source code
// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX - License - Identifier: Apache - 2.0
package main
import (
"context"
"flag"
"fmt"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/config"
"github.com/aws/aws-sdk-go-v2/service/sqs"
"github.com/aws/aws-sdk-go-v2/service/sqs/types"
)
// SQSSendMessageAPI defines the interface for the GetQueueUrl and SendMessage functions.
// We use this interface to test the functions using a mocked service.
type SQSSendMessageAPI interface {
GetQueueUrl(ctx context.Context,
params *sqs.GetQueueUrlInput,
optFns ...func(*sqs.Options)) (*sqs.GetQueueUrlOutput, error)
SendMessage(ctx context.Context,
params *sqs.SendMessageInput,
optFns ...func(*sqs.Options)) (*sqs.SendMessageOutput, error)
}
// GetQueueURL gets the URL of an Amazon SQS queue.
// Inputs:
// c is the context of the method call, which includes the AWS Region.
// api is the interface that defines the method call.
// input defines the input arguments to the service call.
// Output:
// If success, a GetQueueUrlOutput object containing the result of the service call and nil.
// Otherwise, nil and an error from the call to GetQueueUrl.
func GetQueueURL(c context.Context, api SQSSendMessageAPI, input *sqs.GetQueueUrlInput) (*sqs.GetQueueUrlOutput, error) {
return api.GetQueueUrl(c, input)
}
// SendMsg sends a message to an Amazon SQS queue.
// Inputs:
// c is the context of the method call, which includes the AWS Region.
// api is the interface that defines the method call.
// input defines the input arguments to the service call.
// Output:
// If success, a SendMessageOutput object containing the result of the service call and nil.
// Otherwise, nil and an error from the call to SendMessage.
func SendMsg(c context.Context, api SQSSendMessageAPI, input *sqs.SendMessageInput) (*sqs.SendMessageOutput, error) {
return api.SendMessage(c, input)
}
func main() {
queue := flag.String("q", "", "The name of the queue")
flag.Parse()
if *queue == "" {
fmt.Println("You must supply the name of a queue (-q QUEUE)")
return
}
cfg, err := config.LoadDefaultConfig(context.TODO())
if err != nil {
panic("configuration error, " + err.Error())
}
client := sqs.NewFromConfig(cfg)
// Get URL of queue
gQInput := &sqs.GetQueueUrlInput{
QueueName: queue,
}
result, err := GetQueueURL(context.TODO(), client, gQInput)
if err != nil {
fmt.Println("Got an error getting the queue URL:")
fmt.Println(err)
return
}
queueURL := result.QueueUrl
sMInput := &sqs.SendMessageInput{
DelaySeconds: 10,
MessageAttributes: map[string]types.MessageAttributeValue{
"Title": {
DataType: aws.String("String"),
StringValue: aws.String("The Whistler"),
},
"Author": {
DataType: aws.String("String"),
StringValue: aws.String("John Grisham"),
},
"WeeksOn": {
DataType: aws.String("Number"),
StringValue: aws.String("6"),
},
},
MessageBody: aws.String("Information about the NY Times fiction bestseller for the week of 12/11/2016."),
QueueUrl: queueURL,
}
resp, err := SendMsg(context.TODO(), client, sMInput)
if err != nil {
fmt.Println("Got an error sending the message:")
fmt.Println(err)
return
}
fmt.Println("Sent message with ID: " + *resp.MessageId)
}
See the complete example in GitHub.
Last modified January 15, 2021: Code Example Highlighting, Vairous Documentation Fixes (#1045) (495b900)