elastic-grid

/**
 * Elastic Grid
 * Copyright (C) 2008-2010 Elastic Grid, LLC.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.elasticgrid.cluster;

import com.elasticgrid.cluster.spi.CloudPlatformManager;
import com.elasticgrid.config.GenericConfiguration;
import com.elasticgrid.model.Cluster;
import com.elasticgrid.model.ClusterException;
import com.elasticgrid.model.ClusterNotFoundException;
import com.elasticgrid.model.NodeProfileInfo;
import com.elasticgrid.utils.amazon.AWSUtils;
import java.io.IOException;
import java.rmi.RemoteException;
import java.util.HashSet;
import java.util.List;
import java.util.Properties;
import java.util.Set;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeoutException;
import java.util.logging.Logger;

/**
 * Cloud Federation Cluster Manager.
 * This {@link ClusterManager} enables Cloud Federations by exposing all resources from all
 * {@link ClusterManager}s in charge of specific Cloud Platforms.
 * Note: actually this only works by mixing EC2 and LAN platforms.
 * @author Jerome Bernard
 */
public class CloudFederationClusterManager<C extends Cluster> implements ClusterManager<C> {
    private boolean ec2Mode = true;
    private List<CloudPlatformManager<C>> clouds;
    private static final Logger logger = Logger.getLogger(CloudFederationClusterManager.class.getName());

    public void startCluster(String clusterName, List<NodeProfileInfo> clusterTopology)
            throws ClusterException, ExecutionException, TimeoutException, InterruptedException, RemoteException {
        clouds.get(ec2Mode?1:0).startCluster(clusterName, clusterTopology);
    }

    public void stopCluster(String clusterName) throws ClusterException, RemoteException {
        clouds.get(ec2Mode?1:0).stopCluster(clusterName);
    }

    public Set<C> findClusters() throws ClusterException, RemoteException {
        Set<C> clusters = new HashSet<C>();
        for (CloudPlatformManager<C> cloud : clouds)
            clusters.addAll(cloud.findClusters());
        return clusters;
    }

    public C cluster(String name) throws ClusterException, RemoteException {
        /*
        C cluster = null;
        int i = 0;
        logger.log(Level.INFO, "Searching through {0} cloud platforms", clouds.size());
        while ((cluster == null || cluster.getNodes().size() == 0) && i < clouds.size()) {
            CloudPlatformManager<C> cloud = clouds.get(i++);
            logger.log(Level.INFO, "Searching for cluster {0} in cloud {1}", new Object[] { name, cloud.getName() });
            cluster = cloud.cluster(name);
        }
        return cluster;
        */
        if (clouds.size() == 1)
            return clouds.get(0).cluster(name);
        else
            return clouds.get(ec2Mode?1:0).cluster(name);
    }

    public void resizeCluster(String clusterName, List<NodeProfileInfo> clusterTopology)
            throws ClusterNotFoundException, ClusterException, ExecutionException, TimeoutException, InterruptedException, RemoteException {
        clouds.get(ec2Mode?1:0).resizeCluster(clusterName, clusterTopology);
    }

    public void setClouds(List<CloudPlatformManager<C>> clouds) {
        if (clouds == null)
            throw new IllegalArgumentException("The list of cloud platforms can't be null");
        this.clouds = clouds;
        try {
            Properties awsConfig = AWSUtils.loadEC2Configuration();
            String egMode = awsConfig.getProperty(GenericConfiguration.EG_MODE);
            if (egMode != null && egMode.equalsIgnoreCase("lan")) {
                ec2Mode = false;
            }
        } catch (IOException e) {
        }
    }
}