//snippet-sourcedescription:[SubscribeLambda.java demonstrates how to send a confirmation message to an AWS Lambda function.] //snippet-keyword:[Java] //snippet-sourcesyntax:[java] //snippet-keyword:[Code Sample] //snippet-keyword:[Amazon Simple Notification Service] //snippet-service:[sns] //snippet-sourcetype:[full-example] //snippet-sourcedate:[2019-07-20] //snippet-sourceauthor:[scmacdon AWS] /* * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. * * Licensed under the Apache License, Version 2.0 (the "License"). * You may not use this file except in compliance with the License. * A copy of the License is located at * * http://aws.amazon.com/apache2.0 * * or in the "license" file accompanying this file. This file 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 com.example.sns; //snippet-start:[sns.java2.SubscribeLambda.import] import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.sns.SnsClient; import software.amazon.awssdk.services.sns.model.SnsException; import software.amazon.awssdk.services.sns.model.SubscribeRequest; import software.amazon.awssdk.services.sns.model.SubscribeResponse; //snippet-end:[sns.java2.SubscribeLambda.import] public class SubscribeLambda { public static void main(String[] args) { final String USAGE = "\n" + "SubscribeLambda - subscribe an AWS Lambda function.\n" + "Usage: SubscribeLambda <topicArn> <lambdaArn>\n\n" + "Where:\n" + " topicArn - the ARN of the topic to subscribe.\n\n" + " lambdaArn - the ARN of an AWS Lambda function.\n\n"; if (args.length < 2) { System.out.println(USAGE); System.exit(1); } String topicArn = args[0]; String lambdaArn = args[1]; SnsClient snsClient = SnsClient.builder() .region(Region.US_WEST_2) .build(); String arnValue = subLambda(snsClient, topicArn, lambdaArn) ; System.out.println("Subscription ARN: " + arnValue); } //snippet-start:[sns.java2.SubscribeLambda.main] public static String subLambda(SnsClient snsClient, String topicArn, String lambdaArn) { try { SubscribeRequest request = SubscribeRequest.builder() .protocol("lambda") .endpoint(lambdaArn) .returnSubscriptionArn(true) .topicArn(topicArn) .build(); SubscribeResponse result = snsClient.subscribe(request); return result.subscriptionArn(); } catch (SnsException e) { System.err.println(e.awsErrorDetails().errorMessage()); System.exit(1); } return ""; //snippet-end:[sns.java2.SubscribeLambda.main] } }