/*
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.qpid.server.queue;

import org.apache.qpid.server.cluster.MembershipChangeListener;
import org.apache.qpid.server.cluster.MemberHandle;
import org.apache.qpid.server.cluster.GroupManager;
import org.apache.qpid.server.cluster.util.LogMessage;
import org.apache.log4j.Logger;

import java.util.List;

class SubscriberCleanup implements MembershipChangeListener
{
    private static final Logger _logger = Logger.getLogger(SubscriberCleanup.class);

    private final MemberHandle _subject;
    private final ClusteredQueue _queue;
    private final GroupManager _manager;

    SubscriberCleanup(MemberHandle subject, ClusteredQueue queue, GroupManager manager)
    {
        _subject = subject;
        _queue = queue;
        _manager = manager;
        _manager.addMemberhipChangeListener(this);
    }

    public void changed(List<MemberHandle> members)
    {
        if(!members.contains(_subject))
        {
            _queue.removeAllRemoteSubscriber(_subject);
            _manager.removeMemberhipChangeListener(this);
            _logger.info(new LogMessage("Removed {0} from {1}", _subject, _queue));
        }
    }
}
