/*
* Copyright 2004,2005 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.wso2.carbon.mediator.autoscale;
import org.wso2.carbon.ec2client.EC2Client;
import org.wso2.carbon.ec2client.data.Address;
import org.wso2.carbon.ec2client.data.InstanceState;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.util.List;
/**
*
*/
public class Initializer {
private static Log log = LogFactory.getLog(Initializer.class);
public static void main(String[] args) {
log.debug("Initializing system...");
try {
EC2Client ec2Client = new EC2Client(args[0], args[1]);
String elasticIP = System.getenv("ELASTIC_IP");
// Assign the elastic IP to itself, if not already assigned
List<Address> addressList = ec2Client.describeAddresses(new String[]{elasticIP});
String localInstanceId = System.getenv("instance_id");
// Associate this address with this instance only if any other instance has not assigned it to itself
for (Address address : addressList) {
if (address.getInstance() == null) {
ec2Client.associateAddress(localInstanceId, elasticIP);
} else if (!address.getInstance().getInstanceId().equals(localInstanceId) &&
!(address.getInstance().getCurrentState().equals(InstanceState.RUNNING) || address.getInstance().getCurrentState().equals(InstanceState.PENDING))) {
ec2Client.associateAddress(localInstanceId, elasticIP);
}
}
} catch (Exception e) {
log.fatal("Cannot initialize system", e);
e.printStackTrace();
}
}
}