org.elasticdroid.model.ElasticIPsModel.java Source code

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Here is the source code for org.elasticdroid.model.ElasticIPsModel.java

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/**
 *  This file is part of ElasticDroid.
 *
 * ElasticDroid is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
    
 * ElasticDroid is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
    
 * You should have received a copy of the GNU General Public License
 * along with ElasticDroid.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * Authored by siddhu on 12 Dec 2010
 */
package org.elasticdroid.model;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;

import org.elasticdroid.model.ds.SerializableAddress;
import org.elasticdroid.model.tpl.GenericModel;
import org.elasticdroid.tpl.GenericActivity;
import org.elasticdroid.tpl.GenericListActivity;

import com.amazonaws.AmazonClientException;
import com.amazonaws.AmazonServiceException;
import com.amazonaws.auth.BasicAWSCredentials;
import com.amazonaws.services.ec2.AmazonEC2Client;
import com.amazonaws.services.ec2.model.Address;
import com.amazonaws.services.ec2.model.DescribeAddressesRequest;
import com.amazonaws.services.ec2.model.Filter;

/**
 * Model class that takes as (optional) argument a Filter, and returns 
 * either a List<@link{com.amazonaws.services.ec2.model.Address}>, or 
 * an Amazon Service/Client Exception 
 * @author siddhu
 * 12 Dec 2010
 */
public class ElasticIPsModel extends GenericModel<Filter, Void, Object> {
    /** The connection Data for AWS */
    private HashMap<String, String> connectionData;

    /**
     * Start a new ElasticIPsModel object from a GenericListActivity
     * @param genericActivity Of type GenericActivity
     */
    public ElasticIPsModel(GenericListActivity genericActivity, HashMap<String, String> connectionData) {
        super(genericActivity);//call super class
        this.connectionData = connectionData;
    }

    /**
     * Start a new ElasticIPsModel object from a GenericActivity
     * @param genericActivity
     */
    public ElasticIPsModel(GenericActivity genericActivity, HashMap<String, String> connectionData) {
        super(genericActivity);//call super class
        this.connectionData = connectionData;
    }

    /** (non-Javadoc)
     * Execute task in background
     * @return List<@link{com.amazonaws.services.ec2.model.Address}> if successful, or
     * exception on failure.
     */
    @Override
    protected Object doInBackground(Filter... filters) {
        //create credentials using the BasicAWSCredentials class
        BasicAWSCredentials credentials = new BasicAWSCredentials(connectionData.get("accessKey"),
                connectionData.get("secretAccessKey"));
        //create Amazon EC2 Client object, and set tye end point to the region. params[3]
        //contains endpoint
        AmazonEC2Client amazonEC2Client = new AmazonEC2Client(credentials);
        //override the default connection endpoint if provided.
        if (connectionData.get("endpoint") != null) {
            amazonEC2Client.setEndpoint(connectionData.get("endpoint"));
        }

        //create a new DescribeAddressesRequest
        DescribeAddressesRequest request = new DescribeAddressesRequest();
        request.setFilters(new ArrayList<Filter>(Arrays.asList(filters)));

        List<Address> addressList; //result == List<Address>
        List<SerializableAddress> serializableAddressList = new ArrayList<SerializableAddress>();

        //make the request to Amazon EC2
        try {
            addressList = amazonEC2Client.describeAddresses(request).getAddresses();
        } catch (AmazonServiceException amazonServiceException) {
            return amazonServiceException;
        } catch (AmazonClientException amazonClientException) {
            return amazonClientException;
        }

        for (Address address : addressList) {
            serializableAddressList.add(new SerializableAddress(address.getPublicIp(), address.getInstanceId()));
        }

        return serializableAddressList;
    }
}