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/*
 * 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 com.gemstone.gemfire.cache;

import java.util.Set;

/** 
 * Contains information about an event affecting a region reliability, 
 * including its identity and the circumstances of the event. This is 
 * passed in to {@link RegionRoleListener}.
 *
 * @author Kirk Lund
 * @see RegionRoleListener
 * @since 5.0
 */
public interface RoleEvent extends RegionEvent {
  
  /**
   * Returns the required roles that were lost or gained because of this
   * event.
   */
  public Set getRequiredRoles();
  
}