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 static org.apache.oozie.action.hadoop.LauncherMapper.CONF_OOZIE_ACTION_MAIN_CLASS;
022
023import java.io.IOException;
024import java.net.URISyntaxException;
025import java.util.ArrayList;
026import java.util.List;
027
028import org.apache.hadoop.conf.Configuration;
029import org.apache.hadoop.fs.FileSystem;
030import org.apache.hadoop.fs.Path;
031import org.apache.hadoop.mapred.RunningJob;
032import org.apache.oozie.action.ActionExecutorException;
033import org.apache.oozie.client.WorkflowAction;
034import org.apache.oozie.service.HadoopAccessorException;
035import org.jdom.Element;
036import org.jdom.JDOMException;
037import org.jdom.Namespace;
038
039public class Hive2ActionExecutor extends ScriptLanguageActionExecutor {
040
041    private static final String HIVE2_MAIN_CLASS_NAME = "org.apache.oozie.action.hadoop.Hive2Main";
042    static final String HIVE2_JDBC_URL = "oozie.hive2.jdbc.url";
043    static final String HIVE2_PASSWORD = "oozie.hive2.password";
044    static final String HIVE2_SCRIPT = "oozie.hive2.script";
045    static final String HIVE2_QUERY = "oozie.hive2.query";
046    static final String HIVE2_PARAMS = "oozie.hive2.params";
047    static final String HIVE2_ARGS = "oozie.hive2.args";
048
049    private boolean addScriptToCache;
050
051    public Hive2ActionExecutor() {
052        super("hive2");
053        this.addScriptToCache = false;
054    }
055
056    @Override
057    public List<Class> getLauncherClasses() {
058        List<Class> classes = new ArrayList<Class>();
059        try {
060            classes.add(Class.forName(HIVE2_MAIN_CLASS_NAME));
061        }
062        catch (ClassNotFoundException e) {
063            throw new RuntimeException("Class not found", e);
064        }
065        return classes;
066    }
067
068    @Override
069    protected boolean shouldAddScriptToCache(){
070        return this.addScriptToCache;
071    }
072
073    @Override
074    protected String getLauncherMain(Configuration launcherConf, Element actionXml) {
075        return launcherConf.get(CONF_OOZIE_ACTION_MAIN_CLASS, HIVE2_MAIN_CLASS_NAME);
076    }
077
078    @Override
079    @SuppressWarnings("unchecked")
080    Configuration setupActionConf(Configuration actionConf, Context context, Element actionXml,
081                                  Path appPath) throws ActionExecutorException {
082        Configuration conf = super.setupActionConf(actionConf, context, actionXml, appPath);
083        Namespace ns = actionXml.getNamespace();
084
085        String jdbcUrl = actionXml.getChild("jdbc-url", ns).getTextTrim();
086        conf.set(HIVE2_JDBC_URL, jdbcUrl);
087
088        String password = null;
089        Element passwordElement = actionXml.getChild("password", ns);
090        if (passwordElement != null) {
091            password = actionXml.getChild("password", ns).getTextTrim();
092            conf.set(HIVE2_PASSWORD, password);
093        }
094
095        Element queryElement = actionXml.getChild("query", ns);
096        Element scriptElement  = actionXml.getChild("script", ns);
097        if(scriptElement != null) {
098            String script = scriptElement.getTextTrim();
099            String scriptName = new Path(script).getName();
100            this.addScriptToCache = true;
101            conf.set(HIVE2_SCRIPT, scriptName);
102        } else if(queryElement != null) {
103            // Unable to use getTextTrim due to https://issues.apache.org/jira/browse/HIVE-8182
104            String query = queryElement.getText();
105            conf.set(HIVE2_QUERY, query);
106        } else {
107            throw new ActionExecutorException(ActionExecutorException.ErrorType.ERROR, "INVALID_ARGUMENTS",
108                "Hive 2 action requires one of <script> or <query> to be set. Neither were found.");
109        }
110
111        List<Element> params = (List<Element>) actionXml.getChildren("param", ns);
112        String[] strParams = new String[params.size()];
113        for (int i = 0; i < params.size(); i++) {
114            strParams[i] = params.get(i).getTextTrim();
115        }
116        MapReduceMain.setStrings(conf, HIVE2_PARAMS, strParams);
117
118        String[] strArgs = null;
119        List<Element> eArgs = actionXml.getChildren("argument", ns);
120        if (eArgs != null && eArgs.size() > 0) {
121            strArgs = new String[eArgs.size()];
122            for (int i = 0; i < eArgs.size(); i++) {
123                strArgs[i] = eArgs.get(i).getTextTrim();
124            }
125        }
126        MapReduceMain.setStrings(conf, HIVE2_ARGS, strArgs);
127
128        return conf;
129    }
130
131    @Override
132    protected boolean getCaptureOutput(WorkflowAction action) throws JDOMException {
133        return true;
134    }
135
136    @Override
137    protected void getActionData(FileSystem actionFs, RunningJob runningJob, WorkflowAction action, Context context)
138            throws HadoopAccessorException, JDOMException, IOException, URISyntaxException {
139        super.getActionData(actionFs, runningJob, action, context);
140        readExternalChildIDs(action, context);
141    }
142
143    /**
144     * Return the sharelib name for the action.
145     *
146     * @return returns <code>hive2</code>.
147     * @param actionXml
148     */
149    @Override
150    protected String getDefaultShareLibName(Element actionXml) {
151        return "hive2";
152    }
153
154    @Override
155    protected String getScriptName() {
156        return HIVE2_SCRIPT;
157    }
158
159}