public static void createCloudWatchPolicies() {
System.out.println("Preparing Alarms..");
watchClient = new AmazonCloudWatchClient(awsCredentials());
// Scale out alarm
PutMetricAlarmRequest scaleOutRequest = new PutMetricAlarmRequest();
scaleOutRequest.setAlarmName("ScaleOutAlarm");
scaleOutRequest.setMetricName("CPUUtilization");
List<Dimension> dimensions = new ArrayList<Dimension>();
Dimension dimension = new Dimension();
dimension.setName("AutoScalingGroupName");
dimension.setValue("ProjectTwoAutoScaleGroup");
dimensions.add(dimension);
scaleOutRequest.setDimensions(dimensions);
scaleOutRequest.setNamespace("AWS/EC2");
scaleOutRequest.setComparisonOperator(ComparisonOperator.GreaterThanThreshold);
scaleOutRequest.setStatistic(Statistic.Average);
scaleOutRequest.setUnit(StandardUnit.Percent);
scaleOutRequest.setThreshold(70d);
scaleOutRequest.setPeriod(60);
scaleOutRequest.setEvaluationPeriods(1);
// Linking alarm to policy
List<String> actions = new ArrayList<String>();
actions.add(scaleOut);
scaleOutRequest.setAlarmActions(actions);
// Scale in alarm
PutMetricAlarmRequest scaleInRequest = new PutMetricAlarmRequest();
scaleInRequest.setAlarmName("ScaleInAlarm");
scaleInRequest.setMetricName("CPUUtilization");
scaleInRequest.setDimensions(dimensions);
scaleInRequest.setNamespace("AWS/EC2");
scaleInRequest.setComparisonOperator(ComparisonOperator.LessThanThreshold);
scaleInRequest.setStatistic(Statistic.Average);
scaleInRequest.setUnit(StandardUnit.Percent);
scaleInRequest.setThreshold(20d);
scaleInRequest.setPeriod(60);
scaleInRequest.setEvaluationPeriods(4);
// Linking alarm to policy
List<String> actionsTwo = new ArrayList<String>();
actionsTwo.add(scaleIn);
scaleInRequest.setAlarmActions(actionsTwo);
watchClient.putMetricAlarm(scaleOutRequest);
watchClient.putMetricAlarm(scaleInRequest);
System.out.println("Alarms set successfully..");
}
