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.oozie.action.hadoop;
020
021import java.util.ArrayList;
022import java.util.List;
023
024import org.apache.hadoop.conf.Configuration;
025import org.apache.hadoop.fs.Path;
026import org.apache.oozie.action.ActionExecutorException;
027import org.apache.oozie.service.ConfigurationService;
028import org.apache.oozie.service.Services;
029import org.apache.oozie.util.XLog;
030import org.jdom.Element;
031
032public class DistcpActionExecutor extends JavaActionExecutor{
033    public static final String CONF_OOZIE_DISTCP_ACTION_MAIN_CLASS = "org.apache.oozie.action.hadoop.DistcpMain";
034    private static final String DISTCP_MAIN_CLASS_NAME = "org.apache.hadoop.tools.DistCp";
035    public static final String CLASS_NAMES = "oozie.actions.main.classnames";
036    private static final XLog LOG = XLog.getLog(DistcpActionExecutor.class);
037    public static final String DISTCP_TYPE = "distcp";
038
039    public DistcpActionExecutor() {
040        super("distcp");
041    }
042
043    @Override
044    Configuration setupActionConf(Configuration actionConf, Context context, Element actionXml, Path appPath)
045            throws ActionExecutorException {
046        actionConf = super.setupActionConf(actionConf, context, actionXml, appPath);
047        String classNameDistcp = CONF_OOZIE_DISTCP_ACTION_MAIN_CLASS;
048        String name = getClassNamebyType(DISTCP_TYPE);
049        if(name != null){
050            classNameDistcp = name;
051        }
052        actionConf.set(JavaMain.JAVA_MAIN_CLASS, DISTCP_MAIN_CLASS_NAME);
053        return actionConf;
054    }
055
056    @Override
057    public List<Class> getLauncherClasses() {
058        List<Class> classes = new ArrayList<Class>();
059        try {
060            classes.add(Class.forName(CONF_OOZIE_DISTCP_ACTION_MAIN_CLASS));
061        }
062        catch (ClassNotFoundException e) {
063            throw new RuntimeException("Class not found", e);
064        }
065        return classes;
066    }
067
068    /**
069     * This function returns the Action classes names from the configuration
070     *
071     * @param type This is type of the action classes
072     * @return Name of the class from the configuration
073     */
074    public static String getClassNamebyType(String type){
075        String classname = null;
076        for (String function : ConfigurationService.getStrings(CLASS_NAMES)) {
077            function = DistcpActionExecutor.Trim(function);
078            LOG.debug("class for Distcp Action: " + function);
079            String[] str = function.split("=");
080            if (str.length > 0) {
081                if(type.equalsIgnoreCase(str[0])){
082                    classname = new String(str[1]);
083                }
084            }
085        }
086        return classname;
087    }
088
089    /**
090     * To trim string
091     *
092     * @param str
093     * @return trim string
094     */
095    public static String Trim(String str) {
096        if (str != null) {
097            str = str.replaceAll("\\n", "");
098            str = str.replaceAll("\\t", "");
099            str = str.trim();
100        }
101        return str;
102    }
103
104    /**
105     * Return the sharelib name for the action.
106     *
107     * @return returns <code>distcp</code>.
108     * @param actionXml
109     */
110    @Override
111    protected String getDefaultShareLibName(Element actionXml) {
112        return "distcp";
113    }
114
115    @Override
116    protected String getLauncherMain(Configuration launcherConf, Element actionXml) {
117        return launcherConf.get(LauncherMapper.CONF_OOZIE_ACTION_MAIN_CLASS, CONF_OOZIE_DISTCP_ACTION_MAIN_CLASS);
118    }
119
120}