/*
 * Licensed 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 com.groupon.mesos.zookeeper;

import static com.google.common.base.Preconditions.checkNotNull;

import java.util.Set;

/**
 * Sent to the message bus when a new set of nodes should be processed (zookeeper detected a
 * node change).
 */
public class MasterUpdateMessage
{
    private final Set<String> nodes;

    public MasterUpdateMessage(final Set<String> nodes)
    {
        this.nodes = checkNotNull(nodes, "nodes is null");
    }

    public Set<String> getNodes()
    {
        return nodes;
    }

}
