001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.chaos.actions;
019
020import java.io.IOException;
021import org.apache.hadoop.hbase.DistributedHBaseCluster;
022import org.apache.hadoop.hbase.HBaseClusterInterface;
023import org.apache.hadoop.hbase.HBaseClusterManager;
024
025/**
026 * Base class for performing Actions based on linux commands requiring sudo privileges
027 */
028abstract public class SudoCommandAction extends Action {
029
030  protected long timeout;
031  protected HBaseClusterManager clusterManager;
032
033  public SudoCommandAction(long timeout) {
034    this.timeout = timeout;
035  }
036
037  @Override
038  public void init(ActionContext context) throws IOException {
039    super.init(context);
040    HBaseClusterInterface cluster = context.getHBaseCluster();
041    if (cluster instanceof DistributedHBaseCluster) {
042      Object manager = ((DistributedHBaseCluster) cluster).getClusterManager();
043      if (manager instanceof HBaseClusterManager) {
044        clusterManager = (HBaseClusterManager) manager;
045      }
046    }
047  }
048
049  @Override
050  public void perform() throws Exception {
051    if (clusterManager == null) {
052      getLogger().info("Couldn't perform command action, it requires a distributed cluster.");
053      return;
054    }
055
056    // Don't try the modify if we're stopping
057    if (context.isStopping()) {
058      return;
059    }
060
061    localPerform();
062  }
063
064  abstract protected void localPerform() throws IOException;
065}