From the error message, it does look like a network issue. Are you able to use network tools like telnet to rule it out.

telnet sqs.us-east-1.amazonaws.com 443

Hi @Chris Thomson,

I was able to subscribe to alerts in Java couple of years ago. I used the AWS SDK for Java for this. You can look at AWS code sample on how to use SDK for Java.

If you are still having difficulty to get it to work, let us know and we can try to prepare a Java alerts sample.

@Chris Thomson

The code should look like this:

    public void RetrieveMessage(String accesssKeyId, String secretKey, String sessionToken, String endpoint, String cryptographyKey) {
        
        AwsCredentials credentials = AwsSessionCredentials.create(accesssKeyId, secretKey, sessionToken); 

        SqsClient sqsClient = SqsClient.builder()
          .region(Region.US_EAST_1)        
          .credentialsProvider(()->credentials)    
          .build();
        // Receive messages from the queue
        for(int i=1;i<=10;i++) {
        
            ReceiveMessageRequest receiveRequest = ReceiveMessageRequest.builder()
                .queueUrl(endpoint)
                .maxNumberOfMessages(10)
                .waitTimeSeconds(20)
                .build();
            
            List<Message> messages = sqsClient.receiveMessage(receiveRequest).messages();
            for (Message m : messages) {
...
...
}

The full code is on GitHub.

The dependencies are:

<!-- https://mvnrepository.com/artifact/com.amazonaws/aws-java-sdk -->
<dependency>
 <groupId>software.amazon.awssdk</groupId>
  <artifactId>aws-sdk-java</artifactId>
  <version>2.20.87</version>
</dependency>


<!-- https://mvnrepository.com/artifact/com.mashape.unirest/unirest-java -->
<dependency>
    <groupId>com.mashape.unirest</groupId>
    <artifactId>unirest-java</artifactId>
    <version>1.4.9</version>
</dependency>