package org.apache.helix;

/*
 * 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.
 */

import org.apache.helix.zookeeper.datamodel.ZNRecord;


/**
 * Interface to provide additional information about a live instance at creation time
 */
public interface LiveInstanceInfoProvider {
  /**
   * Callback function that is called by HelixManager before it creates LiveInstance Zk Node.
   * The ZNRecord returned by this function
   * @see ZkHelixManager#addLiveInstance()
   * @see HelixManager#setLiveInstanceInfoProvider(LiveInstanceInfoProvider)
   */
  ZNRecord getAdditionalLiveInstanceInfo();
}