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1function getInstances(apiKey, secretKey, instanceId){
2	console.log("[ComputeQloud] Listing running instances - expecting success");
3
4	//a promise is part of node fibers (threads) and can wait for a callback to finish
5	var mypromise = new promise();
6
7	var options = null;
8	if (instanceId) {
9		options = {
10			FilterName: [ 'instance-id' ],
11			FilterValue: [ [instanceId] ]
12		}
13	}
14  	
15	getEC2(apiKey, secretKey).DescribeInstances(options, function(err, result) {
16		if (err) {
17			inspect(err, 'Error');
18			mypromise.set(new Meteor.Error(500, "Can't find my pants"));
19			return;
20		}
21
22		var instances = result.Body.DescribeInstancesResponse.reservationSet;
23		inspect(instances, 'Data');
24		mypromise.set(instances)
25		return;
26	});
27
28	mypromise.wait();
29	
30	finalValue = mypromise.get();
31	if(finalValue instanceof Meteor.Error){
32		throw finalValue;
33	}
34
35	return finalValue;
36}