com.eucalyptus.objectstorage.WalrusAvailabilityEventListener.java Source code

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Here is the source code for com.eucalyptus.objectstorage.WalrusAvailabilityEventListener.java

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/*************************************************************************
 * Copyright 2009-2012 Eucalyptus Systems, Inc.
 *
 * This program 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; version 3 of the License.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see http://www.gnu.org/licenses/.
 *
 * Please contact Eucalyptus Systems, Inc., 6755 Hollister Ave., Goleta
 * CA 93117, USA or visit http://www.eucalyptus.com/licenses/ if you need
 * additional information or have any questions.
 ************************************************************************/
package com.eucalyptus.objectstorage;

import static com.eucalyptus.reporting.event.ResourceAvailabilityEvent.Availability;
import static com.eucalyptus.reporting.event.ResourceAvailabilityEvent.ResourceType.StorageWalrus;
import org.apache.commons.io.FileUtils;
import org.apache.log4j.Logger;
import com.eucalyptus.bootstrap.Bootstrap;
import com.eucalyptus.bootstrap.BootstrapArgs;
import com.eucalyptus.bootstrap.Hosts;
import com.eucalyptus.component.Topology;
import com.eucalyptus.event.ClockTick;
import com.eucalyptus.event.EventListener;
import com.eucalyptus.event.ListenerRegistry;
import com.eucalyptus.event.Listeners;
import com.eucalyptus.objectstorage.entities.WalrusInfo;
import com.eucalyptus.objectstorage.policy.WalrusQuotaUtil;
import com.eucalyptus.reporting.event.ResourceAvailabilityEvent;

/**
 *  Event listener that fires ResourceAvailabilityEvents for the Walrus.
 */
public class WalrusAvailabilityEventListener implements EventListener<ClockTick> {
    private static Logger logger = Logger.getLogger(WalrusAvailabilityEventListener.class);

    public static void register() {
        Listeners.register(ClockTick.class, new WalrusAvailabilityEventListener());
    }

    @Override
    public void fireEvent(final ClockTick event) {
        if (BootstrapArgs.isCloudController() && Bootstrap.isOperational()) {
            try {

                WalrusInfo wInfo = WalrusInfo.getWalrusInfo();
                long capacity = 0;
                if (wInfo != null)
                    capacity = wInfo.getStorageMaxTotalCapacity();

                ListenerRegistry.getInstance().fireEvent(new ResourceAvailabilityEvent(StorageWalrus,
                        new Availability(capacity, Math.max(0, capacity - (long) Math
                                .ceil((double) WalrusQuotaUtil.countTotalObjectSize() / FileUtils.ONE_GB)))));
            } catch (Exception ex) {
                logger.error(ex, ex);
            }
        }
    }
}