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.FSDataOutputStream;
023import org.apache.hadoop.fs.FileSystem;
024import org.apache.hadoop.fs.Path;
025import org.apache.oozie.action.ActionExecutorException;
026import org.apache.oozie.util.XLog;
027import org.jdom.Element;
028import org.jdom.Namespace;
029
030import java.io.IOException;
031import java.nio.charset.StandardCharsets;
032import java.util.List;
033
034public abstract class ScriptLanguageActionExecutor extends JavaActionExecutor {
035
036    public ScriptLanguageActionExecutor(String type) {
037        super(type);
038    }
039
040    @SuppressWarnings("rawtypes")
041    @Override
042    public List<Class> getLauncherClasses() {
043        return null;
044    }
045
046    protected boolean shouldAddScriptToCache(){
047        return true;
048    }
049
050    @Override
051    protected Configuration setupLauncherConf(Configuration conf, Element actionXml, Path appPath, Context context)
052        throws ActionExecutorException {
053        super.setupLauncherConf(conf, actionXml, appPath, context);
054        if(shouldAddScriptToCache()) {
055            addScriptToCache(conf, actionXml, appPath, context);
056        }
057        return conf;
058
059    }
060
061    protected void addScriptToCache(Configuration conf, Element actionXml, Path appPath, Context context)
062        throws ActionExecutorException {
063        Namespace ns = actionXml.getNamespace();
064        String script = actionXml.getChild("script", ns).getTextTrim();
065        String name = new Path(script).getName();
066        String scriptContent = context.getProtoActionConf().get(this.getScriptName());
067
068        Path scriptFile = null;
069        if (scriptContent != null) { // Create script on filesystem if this is
070            // an http submission job;
071            FSDataOutputStream dos = null;
072            try {
073                Path actionPath = context.getActionDir();
074                scriptFile = new Path(actionPath, script);
075                FileSystem fs = context.getAppFileSystem();
076                dos = fs.create(scriptFile);
077                dos.write(scriptContent.getBytes(StandardCharsets.UTF_8));
078
079                addToCache(conf, actionPath, script + "#" + name, false);
080            }
081            catch (Exception ex) {
082                throw new ActionExecutorException(ActionExecutorException.ErrorType.ERROR, "FAILED_OPERATION", XLog
083                        .format("Not able to write script file {0} on hdfs", scriptFile), ex);
084            }
085            finally {
086                try {
087                    if (dos != null) {
088                        dos.close();
089                    }
090                }
091                catch (IOException ex) {
092                    XLog.getLog(getClass()).error("Error: " + ex.getMessage());
093                }
094            }
095        }
096        else {
097            addToCache(conf, appPath, script + "#" + name, false);
098        }
099    }
100
101    protected abstract String getScriptName();
102}