How do we retrieve ec2 client tags

Question

How can I retrieve the tags for ec2 instance using Java aws v2 library. I have been stuck at this for a while. The filter I want to apply is the resource id but its giving me a syntax error

DescribeTagsRequest req = DescribeTagsRequest.builder().filters(new Filter())

Answer 1

import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.ec2.Ec2Client;
import software.amazon.awssdk.services.ec2.model.*;
import java.util.List;

public class DescribeInstanceTags {

    public static void main(String[] args) {

        String resourceId = args[0]; // Get this value from AWS Management Console
        Region region = Region.US_EAST_1;
        Ec2Client ec2 = Ec2Client.builder()
                .region(region)
                .build();

        describeEC2Tags(ec2, resourceId);
        ec2.close();
    }

    public static void describeEC2Tags(Ec2Client ec2,  String resourceId ) {

        try {

            Filter filter = Filter.builder()
                    .name("resource-id")
                    .values(resourceId)
                    .build();

            DescribeTagsResponse describeTagsResponse = ec2.describeTags(DescribeTagsRequest.builder().filters(filter).build());
            List<TagDescription> tags = describeTagsResponse.tags();
            for (TagDescription tag: tags) {
                System.out.println("Tag key is: "+tag.key());
                System.out.println("Tag value is: "+tag.value());
            }

        } catch ( Ec2Exception e) {
         System.err.println(e.awsErrorDetails().errorMessage());
            System.exit(1);
        }
    }
}