/**
* Describe a set of specific instances.
*
* @param instanceIds the instance ids
* @return the instances
*/
public List<Instance> describeInstances(String... instanceIds) {
if (instanceIds == null || instanceIds.length == 0) {
LOGGER.info("Getting all EC2 instances.");
} else {
LOGGER.info(String.format("Getting EC2 instances for %d ids.", instanceIds.length));
}
List<Instance> instances = new LinkedList<Instance>();
AmazonEC2 ec2Client = ec2Client();
DescribeInstancesRequest request = new DescribeInstancesRequest();
if (instanceIds != null) {
request.withInstanceIds(Arrays.asList(instanceIds));
}
DescribeInstancesResult result = ec2Client.describeInstances(request);
for (Reservation reservation : result.getReservations()) {
instances.addAll(reservation.getInstances());
}
LOGGER.info(String.format("Got %d EC2 instances.", instances.size()));
return instances;
}
