Access EC2 Instance using Basic Credentials

Question

I'm trying to use the Java SDK to programmatically stop an EC2 instance. I'm very new the AWS api, but what I'm trying to do should be very basic:

BasicAWSCredentials credentials = new BasicAWSCredentials(ACCESS_KEY, SECRET_KEY);

AmazonEC2Client ec2 = new AmazonEC2Client(credentials); //ERROR caused by this line

I've seen several examples of this, for example here. I know the better way to do this is by using IAM roles, but I'm just trying to get something to work first. The line that creates the AmazonEC2 throws this error

java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/ObjectMapper at com.amazonaws.util.json.Jackson. 

I can't figure out why it's throwing a class definition not found error.

Answer 1

I figured out the issue. Apparently the AWS library requires three more dependencies in fasterxml.jackson.core. Because I was using Ivy to configure these, I had to add these manually