/*************************************************************************
* Copyright 2009-2014 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.simplequeue.async;
import com.eucalyptus.auth.policy.ern.Ern;
import com.eucalyptus.simplequeue.Constants;
import com.eucalyptus.simplequeue.common.policy.SimpleQueueResourceName;
import com.eucalyptus.simplequeue.persistence.PersistenceFactory;
import com.eucalyptus.simplequeue.persistence.Queue;
import com.eucalyptus.simpleworkflow.common.stateful.PolledNotificationChecker;
import javax.annotation.Nullable;
/**
* Created by ethomas on 12/14/16.
*/
public class QueuePolledNotificationChecker implements PolledNotificationChecker {
@Override
public boolean apply(@Nullable String channel) {
try {
Ern ern = Ern.parse(channel);
// may be applicable only if channel is a queue arn
if (!(ern instanceof SimpleQueueResourceName)) {
return false;
}
return PersistenceFactory.queueHasMessages((SimpleQueueResourceName) ern);
} catch (Exception ignore) {
}
return false;
}
}