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