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.jdom.Element;
025import org.jdom.Namespace;
026
027import java.util.ArrayList;
028import java.util.List;
029
030import static org.apache.oozie.action.hadoop.LauncherMapper.CONF_OOZIE_ACTION_MAIN_CLASS;
031
032public class Hive2ActionExecutor extends ScriptLanguageActionExecutor {
033
034    private static final String HIVE2_MAIN_CLASS_NAME = "org.apache.oozie.action.hadoop.Hive2Main";
035    static final String HIVE2_JDBC_URL = "oozie.hive2.jdbc.url";
036    static final String HIVE2_PASSWORD = "oozie.hive2.password";
037    static final String HIVE2_SCRIPT = "oozie.hive2.script";
038    static final String HIVE2_QUERY = "oozie.hive2.query";
039    static final String HIVE2_PARAMS = "oozie.hive2.params";
040    static final String HIVE2_ARGS = "oozie.hive2.args";
041
042    private boolean addScriptToCache;
043
044    public Hive2ActionExecutor() {
045        super("hive2");
046        this.addScriptToCache = false;
047    }
048
049    @Override
050    public List<Class> getLauncherClasses() {
051        List<Class> classes = new ArrayList<Class>();
052        try {
053            classes.add(Class.forName(HIVE2_MAIN_CLASS_NAME));
054        }
055        catch (ClassNotFoundException e) {
056            throw new RuntimeException("Class not found", e);
057        }
058        return classes;
059    }
060
061    @Override
062    protected boolean shouldAddScriptToCache(){
063        return this.addScriptToCache;
064    }
065
066    @Override
067    protected String getLauncherMain(Configuration launcherConf, Element actionXml) {
068        return launcherConf.get(CONF_OOZIE_ACTION_MAIN_CLASS, HIVE2_MAIN_CLASS_NAME);
069    }
070
071    @Override
072    @SuppressWarnings("unchecked")
073    Configuration setupActionConf(Configuration actionConf, Context context, Element actionXml,
074                                  Path appPath) throws ActionExecutorException {
075        Configuration conf = super.setupActionConf(actionConf, context, actionXml, appPath);
076        Namespace ns = actionXml.getNamespace();
077
078        String jdbcUrl = actionXml.getChild("jdbc-url", ns).getTextTrim();
079        conf.set(HIVE2_JDBC_URL, jdbcUrl);
080
081        String password = null;
082        Element passwordElement = actionXml.getChild("password", ns);
083        if (passwordElement != null) {
084            password = actionXml.getChild("password", ns).getTextTrim();
085            conf.set(HIVE2_PASSWORD, password);
086        }
087
088        Element queryElement = actionXml.getChild("query", ns);
089        Element scriptElement  = actionXml.getChild("script", ns);
090        if(scriptElement != null) {
091            String script = scriptElement.getTextTrim();
092            String scriptName = new Path(script).getName();
093            this.addScriptToCache = true;
094            conf.set(HIVE2_SCRIPT, scriptName);
095        } else if(queryElement != null) {
096            // Unable to use getTextTrim due to https://issues.apache.org/jira/browse/HIVE-8182
097            String query = queryElement.getText();
098            conf.set(HIVE2_QUERY, query);
099        } else {
100            throw new ActionExecutorException(ActionExecutorException.ErrorType.ERROR, "INVALID_ARGUMENTS",
101                "Hive 2 action requires one of <script> or <query> to be set. Neither were found.");
102        }
103
104        List<Element> params = (List<Element>) actionXml.getChildren("param", ns);
105        String[] strParams = new String[params.size()];
106        for (int i = 0; i < params.size(); i++) {
107            strParams[i] = params.get(i).getTextTrim();
108        }
109        MapReduceMain.setStrings(conf, HIVE2_PARAMS, strParams);
110
111        String[] strArgs = null;
112        List<Element> eArgs = actionXml.getChildren("argument", ns);
113        if (eArgs != null && eArgs.size() > 0) {
114            strArgs = new String[eArgs.size()];
115            for (int i = 0; i < eArgs.size(); i++) {
116                strArgs[i] = eArgs.get(i).getTextTrim();
117            }
118        }
119        MapReduceMain.setStrings(conf, HIVE2_ARGS, strArgs);
120
121        return conf;
122    }
123
124    /**
125     * Return the sharelib name for the action.
126     *
127     * @return returns <code>hive2</code>.
128     * @param actionXml
129     */
130    @Override
131    protected String getDefaultShareLibName(Element actionXml) {
132        return "hive2";
133    }
134
135    @Override
136    protected String getScriptName() {
137        return HIVE2_SCRIPT;
138    }
139
140    @Override
141    public String[] getShareLibFilesForActionConf() {
142        return new String[] { "hive-site.xml" };
143    }
144
145}