/**
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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.hadoop.hbase.chaos.actions;

import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.chaos.monkies.PolicyBasedChaosMonkey;
import org.apache.hadoop.hbase.zookeeper.ZKServerTool;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Action that restarts a random zookeeper node.
 */
public class RestartRandomZKNodeAction extends RestartActionBaseAction {
  private static final Logger LOG = LoggerFactory.getLogger(RestartRandomZKNodeAction.class);

  public RestartRandomZKNodeAction(long sleepTime) {
    super(sleepTime);
  }

  @Override
  public void perform() throws Exception {
    LOG.info("Performing action: Restart random zookeeper node");
    ServerName server = PolicyBasedChaosMonkey.selectRandomItem(
        ZKServerTool.readZKNodes(getConf()));
    restartZKNode(server, sleepTime);
  }
}
