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 */ 018 019package org.apache.hadoop.hbase.chaos.actions; 020 021import java.io.IOException; 022 023import org.apache.hadoop.hbase.DistributedHBaseCluster; 024import org.apache.hadoop.hbase.HBaseCluster; 025import org.apache.hadoop.hbase.HBaseClusterManager; 026import org.slf4j.Logger; 027import org.slf4j.LoggerFactory; 028 029/** 030 * Base class for performing Actions based on linux commands requiring sudo privileges 031 */ 032abstract public class SudoCommandAction extends Action { 033 private static final Logger LOG = LoggerFactory.getLogger(SudoCommandAction.class); 034 035 protected long timeout; 036 protected HBaseClusterManager clusterManager; 037 038 public SudoCommandAction(long timeout) { 039 this.timeout = timeout; 040 } 041 042 @Override 043 public void init(ActionContext context) throws IOException { 044 super.init(context); 045 HBaseCluster cluster = context.getHBaseCluster(); 046 if(cluster != null && cluster instanceof DistributedHBaseCluster){ 047 Object manager = ((DistributedHBaseCluster)cluster).getClusterManager(); 048 if(manager != null && manager instanceof HBaseClusterManager){ 049 clusterManager = (HBaseClusterManager) manager; 050 } 051 } 052 } 053 054 @Override 055 public void perform() throws Exception { 056 if(clusterManager == null){ 057 LOG.info("Couldn't perform command action, it requires a distributed cluster."); 058 return; 059 } 060 061 // Don't try the modify if we're stopping 062 if (context.isStopping()) { 063 return; 064 } 065 066 localPerform(); 067 } 068 069 abstract protected void localPerform() throws IOException; 070}