使用 AWS Java SDK v1,您可以使用Topics.subscribeQueue方法将 SQS 队列订阅到 SNS 主题,其中端点对象接受queueUrl,如下所示:
Topics.subscribeQueue(sns, sqs, myTopicARN, queueURL);
使用 AWS Java SDK v2,您可以使用方法SunscribeRequest.builder将 SQS 队列订阅到 SNS 主题,其中端点对象接受queueArn。
下面是一个示例 java 代码片段,我已经测试它成功地将 SQS 队列订阅到 SNS 主题:
public static void subscribeSQStoSNS(String queueUrl, String topicArn, SqsClient sqsClient, SnsClient snsClient) {
/* with AWS Java SDK v1, you could subscribe an SQS queue to an SNS topic by
* calling "Topics.subscribeQueue"()[1] where the endpoint object takes in queueUrl.
*
* with AWS Java SDK v2, to subscribe an SQS queue to an SNS topic
* one needs to use "SunscribeRequest.builder"() [2] where the endpoint object takes in queueArn.
*
* [1] https://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/services/sns/util/Topics.html
* [2] https://sdk.amazonaws.com/java/api/2.0.0-preview-11/software/amazon/awssdk/services/sns/model/SubscribeRequest.Builder.html
*
*/
// Step 1: We call "get-queue-attributes" API to retrieve the SQS queue Arn
GetQueueAttributesRequest QueueAttributesRequest = GetQueueAttributesRequest.builder()
.queueUrl(queueUrl)
.attributeNamesWithStrings("All")
.build();
GetQueueAttributesResponse QueueAttributesResult = sqsClient.getQueueAttributes(QueueAttributesRequest);
Map<String, String> sqsAttributeMap = QueueAttributesResult.attributesAsStrings();
System.out.println("\n\n"+ QueueAttributesRequest);
String queueArn = sqsAttributeMap.get("QueueArn");
//System.out.println("\n\n"+ queueArn);
// Step 2: We call "SubscribeRequest.builder" to subscribe the SQS queue to the SNS topic
SubscribeRequest Qrequest = SubscribeRequest.builder()
.protocol("sqs")
.endpoint(queueArn)
.returnSubscriptionArn(true)
.topicArn(topicArn)
.build();
SubscribeResponse Qresponse = snsClient.subscribe(Qrequest);
System.out.println("\n\nCreated Subscription ARN: " + Qresponse.subscriptionArn()+ " " + " and StatusCode : " + Qresponse.sdkHttpResponse().statusCode());}
笔记:
1. “ Topics.subscribeQueue”()方法自动为订阅创建策略,允许主题向队列发送消息。
2、“SunscribeRequest.builder”()方法不会自动为订阅(即SQS队列)添加策略,以允许SNS主题向队列发送消息。因此,通过将以下示例策略添加到 SQS 队列,确保您已授予 SNS 主题发布到 SQS 队列的权限,如下所示,也如此处所述:
{
"Statement": [{
"Effect":"Allow",
"Principal":"*",
"Action":"sqs:SendMessage",
"Resource":"arn:aws:sqs:us-east-2:123456789012:MyQueue",
"Condition":{
"ArnEquals":{
"aws:SourceArn":"arn:aws:sns:us-east-2:123456789012:MyTopic"
}
}
}]
}
您可以在 github 中找到完整的代码:https ://gist.github.com/syumaK/79c946ed4e618c1f871f50ecb1819a0f
希望这可以帮助。