Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package edu.buffalo.cse.pigout; import edu.buffalo.cse.pigout.tools.pigoutcmd.PigOutSh; import org.antlr.runtime.RecognitionException; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.util.GenericOptionsParser; import org.apache.log4j.Level; import org.apache.log4j.Logger; import org.apache.log4j.PropertyConfigurator; import org.apache.pig.ExecType; import org.apache.pig.LoadFunc; import org.apache.pig.PigException; import org.apache.pig.PigRunner.ReturnCode; import org.apache.pig.backend.executionengine.ExecException; import org.apache.pig.backend.hadoop.datastorage.ConfigurationUtil; import org.apache.pig.impl.PigContext; import org.apache.pig.impl.io.FileLocalizer; import org.apache.pig.impl.util.*; import org.apache.pig.parser.DryRunGruntParser; import org.apache.pig.scripting.ScriptEngine; import org.apache.pig.scripting.ScriptEngine.SupportedScriptLang; import org.apache.pig.tools.cmdline.CmdLineParser; import org.apache.pig.tools.pigstats.PigProgressNotificationListener; import org.apache.pig.tools.pigstats.PigStats; import org.apache.pig.tools.pigstats.PigStatsUtil; import org.apache.pig.tools.pigstats.ScriptState; import org.apache.pig.tools.timer.PerformanceTimerFactory; import java.io.*; import java.text.ParseException; import java.util.*; import java.util.jar.Attributes; import java.util.jar.JarFile; import java.util.jar.Manifest; /** * PigOut Main class based on Pig's Main */ /** * Let's make this simple. * Do not take scripts in command line. Instead, only allow -f option */ public class Main { private final static Log log = LogFactory.getLog(Main.class); private static final String LOG4J_CONF = "log4jconf"; private static final String BRIEF = "brief"; private static final String DEBUG = "debug"; private static final String VERBOSE = "verbose"; private static final String version; private static final String majorVersion; private static final String minorVersion; private static final String patchVersion; private static final String svnRevision; private static final String buildTime; private enum ExecMode { STRING, FILE, SHELL, UNKNOWN } private static final String PROP_FILT_SIMPL_OPT = "pig.exec.filterLogicExpressionSimplifier"; protected static final String PROGRESS_NOTIFICATION_LISTENER_KEY = "pig.notification.listener"; protected static final String PROGRESS_NOTIFICATION_LISTENER_ARG_KEY = "pig.notification.listener.arg"; static { Attributes attr = null; try { String findContainingJar = JarManager.findContainingJar(Main.class); if (findContainingJar != null) { JarFile jar = new JarFile(findContainingJar); final Manifest manifest = jar.getManifest(); final Map<String, Attributes> attrs = manifest.getEntries(); attr = attrs.get("edu/buffalo/cse/pigout"); jar.close(); } else { log.info( "Unable to read PigOut manifest file as we are not running from a jar, version information unavailable"); } } catch (Exception e) { log.warn("Unable to read PigOut manifest file, version information unavailable", e); } if (attr != null) { version = attr.getValue("Implementation-Version"); svnRevision = attr.getValue("Svn-Revision"); buildTime = attr.getValue("Build-TimeStamp"); String[] split = version.split("\\."); majorVersion = split[0]; minorVersion = split[1]; patchVersion = split[2]; } else { version = null; majorVersion = null; minorVersion = null; patchVersion = null; svnRevision = null; buildTime = null; } } public static void main(String args[]) { System.exit(run(args, null)); } static int run(String args[], PigProgressNotificationListener listener) { int rc = 1; boolean verbose = false; boolean pigoutCalled = false; String logFileName = null; try { Configuration conf = new Configuration(false); GenericOptionsParser parser = new GenericOptionsParser(conf, args); conf = parser.getConfiguration(); // create and update properties from configurations Properties properties = new Properties(); PropertiesUtil.loadDefaultProperties(properties); PropertiesUtil.loadPropertiesFromFile(properties, "./conf/pigout.properties"); properties.putAll(ConfigurationUtil.toProperties(conf)); for (String key : properties.stringPropertyNames()) { log.debug(key + " = " + properties.getProperty(key)); } if (listener == null) { listener = makeListener(properties); } String[] pigArgs = parser.getRemainingArgs(); boolean userSpecifiedLog = false; boolean checkScriptOnly = false; BufferedReader pin = null; boolean debug = false; boolean dryrun = false; boolean embedded = false; List<String> params = new ArrayList<String>(); List<String> paramFiles = new ArrayList<String>(); HashSet<String> disabledOptimizerRules = new HashSet<String>(); CmdLineParser opts = new CmdLineParser(pigArgs); opts.registerOpt('4', "log4jconf", CmdLineParser.ValueExpected.REQUIRED); opts.registerOpt('b', "brief", CmdLineParser.ValueExpected.NOT_ACCEPTED); opts.registerOpt('c', "check", CmdLineParser.ValueExpected.NOT_ACCEPTED); opts.registerOpt('d', "debug", CmdLineParser.ValueExpected.REQUIRED); opts.registerOpt('e', "execute", CmdLineParser.ValueExpected.NOT_ACCEPTED); opts.registerOpt('f', "file", CmdLineParser.ValueExpected.REQUIRED); opts.registerOpt('g', "embedded", CmdLineParser.ValueExpected.REQUIRED); opts.registerOpt('h', "help", CmdLineParser.ValueExpected.OPTIONAL); opts.registerOpt('i', "version", CmdLineParser.ValueExpected.OPTIONAL); opts.registerOpt('l', "logfile", CmdLineParser.ValueExpected.REQUIRED); opts.registerOpt('m', "param_file", CmdLineParser.ValueExpected.OPTIONAL); opts.registerOpt('p', "param", CmdLineParser.ValueExpected.OPTIONAL); opts.registerOpt('r', "dryrun", CmdLineParser.ValueExpected.NOT_ACCEPTED); opts.registerOpt('t', "optimizer_off", CmdLineParser.ValueExpected.REQUIRED); opts.registerOpt('v', "verbose", CmdLineParser.ValueExpected.NOT_ACCEPTED); opts.registerOpt('w', "warning", CmdLineParser.ValueExpected.NOT_ACCEPTED); opts.registerOpt('x', "exectype", CmdLineParser.ValueExpected.REQUIRED); opts.registerOpt('F', "stop_on_failure", CmdLineParser.ValueExpected.NOT_ACCEPTED); opts.registerOpt('M', "no_multiquery", CmdLineParser.ValueExpected.NOT_ACCEPTED); opts.registerOpt('P', "propertyFile", CmdLineParser.ValueExpected.REQUIRED); ExecMode mode = ExecMode.UNKNOWN; String file = null; String engine = null; ExecType execType = ExecType.LOCAL; // set up client side system properties in UDF context UDFContext.getUDFContext().setClientSystemProps(properties); char opt; //properties.setProperty("opt.multiquery",""+true); while ((opt = opts.getNextOpt()) != CmdLineParser.EndOfOpts) { switch (opt) { case '4': String log4jconf = opts.getValStr(); if (log4jconf != null) { properties.setProperty(LOG4J_CONF, log4jconf); } break; case 'b': properties.setProperty(BRIEF, "true"); break; case 'c': checkScriptOnly = true; break; case 'd': String logLevel = opts.getValStr(); if (logLevel != null) { properties.setProperty(DEBUG, logLevel); } debug = true; break; case 'e': mode = ExecMode.STRING; break; case 'f': mode = ExecMode.FILE; file = opts.getValStr(); break; case 'g': embedded = true; engine = opts.getValStr(); break; case 'F': properties.setProperty("stop.on.failure", "" + true); break; case 'h': String topic = opts.getValStr(); if (topic != null) { System.out.println("Topic based help is not provided yet."); usage(); } else usage(); return ReturnCode.SUCCESS; case 'i': System.out.println(getVersionString()); return ReturnCode.SUCCESS; case 'l': //call to method that validates the path to the log file //and sets up the file to store the client side log file String logFileParameter = opts.getValStr(); if (logFileParameter != null && logFileParameter.length() > 0) { logFileName = validateLogFile(logFileParameter, null); } else { logFileName = validateLogFile(logFileName, null); } userSpecifiedLog = true; properties.setProperty("pig.logfile", (logFileName == null ? "" : logFileName)); break; case 'm': //adds a parameter file paramFiles.add(opts.getValStr()); break; case 'M': // turns off multiquery optimization properties.setProperty("opt.multiquery", "" + false); break; case 'p': //adds a parameter params.add(opts.getValStr()); break; case 'r': // currently only used for parameter substitution // will be extended in the future dryrun = true; break; case 't': //disables a opt rule disabledOptimizerRules.add(opts.getValStr()); break; case 'v': properties.setProperty(VERBOSE, "" + true); verbose = true; break; case 'w': properties.setProperty("aggregate.warning", "" + false); break; case 'x': //sets execution type: try { execType = ExecType.fromString(opts.getValStr()); } catch (IOException e) { throw new RuntimeException("ERROR: Unrecognized exectype.", e); } break; case 'P': { InputStream inputStream = null; try { FileLocalizer.FetchFileRet localFileRet = FileLocalizer.fetchFile(properties, opts.getValStr()); inputStream = new BufferedInputStream(new FileInputStream(localFileRet.file)); properties.load(inputStream); } catch (IOException e) { throw new RuntimeException("Unable to parse properties file '" + opts.getValStr() + "'"); } finally { if (inputStream != null) { try { inputStream.close(); } catch (IOException e) { } } } } break; default: { Character cc = Character.valueOf(opt); throw new AssertionError("Unhandled option " + cc.toString()); } } } // create the context with the parameter PigContext pigContext = new PigContext(execType, properties); // create the static script state object String commandLine = LoadFunc.join((AbstractList<String>) Arrays.asList(args), " "); ScriptState scriptState = ScriptState.start(commandLine, pigContext); if (listener != null) { scriptState.registerListener(listener); } pigContext.getProperties().setProperty("pig.cmd.args", commandLine); if (logFileName == null && !userSpecifiedLog) { logFileName = validateLogFile(properties.getProperty("pig.logfile"), null); } pigContext.getProperties().setProperty("pig.logfile", (logFileName == null ? "" : logFileName)); // configure logging configureLog4J(properties, pigContext); log.info(getVersionString().replace("\n", "")); if (logFileName != null) { log.info("Logging error messages to: " + logFileName); } if (!Boolean.valueOf(properties.getProperty(PROP_FILT_SIMPL_OPT, "false"))) { //turn off if the user has not explicitly turned on this optimization disabledOptimizerRules.add("FilterLogicExpressionSimplifier"); } pigContext.getProperties().setProperty("pig.optimizer.rules", ObjectSerializer.serialize(disabledOptimizerRules)); PigContext.setClassLoader(pigContext.createCl(null)); // construct the parameter substitution preprocessor PigOutSh pigOutSh = null; BufferedReader in; String substFile = null; paramFiles = fetchRemoteParamFiles(paramFiles, properties); pigContext.setParams(params); pigContext.setParamFiles(paramFiles); switch (mode) { case FILE: { String remainders[] = opts.getRemainingArgs(); if (remainders != null) { pigContext.getProperties().setProperty(PigContext.PIG_CMD_ARGS_REMAINDERS, ObjectSerializer.serialize(remainders)); } FileLocalizer.FetchFileRet localFileRet = FileLocalizer.fetchFile(properties, file); if (localFileRet.didFetch) { properties.setProperty("pig.jars.relative.to.dfs", "true"); } scriptState.setFileName(file); if (embedded) { return runEmbeddedScript(pigContext, localFileRet.file.getPath(), engine); } else { SupportedScriptLang type = determineScriptType(localFileRet.file.getPath()); log.debug("File: " + localFileRet.file.getPath() + " Script type: " + type); if (type != null) { return runEmbeddedScript(pigContext, localFileRet.file.getPath(), type.name().toLowerCase()); } } //Reader is created by first loading "pigout.load.default.statements" or .pigoutbootup file if available in = new BufferedReader(new InputStreamReader( Utils.getCompositeStream(new FileInputStream(localFileRet.file), properties))); //run parameter substitution preprocessor first substFile = file + ".substituted"; pin = runParamPreprocessor(pigContext, in, substFile, debug || dryrun || checkScriptOnly); if (dryrun) { if (dryrun(substFile, pigContext)) { log.info("Dry run completed. Substituted pig script is at " + substFile + ". Expanded pig script is at " + file + ".expanded"); } else { log.info("Dry run completed. Substituted pig script is at " + substFile); } return ReturnCode.SUCCESS; } logFileName = validateLogFile(logFileName, file); pigContext.getProperties().setProperty("pig.logfile", (logFileName == null ? "" : logFileName)); // Set job name based on name of the script pigContext.getProperties().setProperty(PigContext.JOB_NAME, "PigOut_" + new File(file).getName()); if (!debug) { new File(substFile).deleteOnExit(); } scriptState.setScript(new File(file)); // From now on, PigOut starts... // Create a shell interface to PigOutServer pigOutSh = new PigOutSh(pin, pigContext); pigoutCalled = true; if (checkScriptOnly) { // -c option //Check syntax pigOutSh.checkScript(substFile); System.err.println(file + " syntax OK"); return ReturnCode.SUCCESS; } // parseAndBuild() will parse, and then generate a script log.info("PigOut is parsing and analyzing the script..."); pigOutSh.parseAndBuild(); log.debug("PigOut is partitioning the plan..."); pigOutSh.partition(); return ReturnCode.SUCCESS; } case STRING: { log.error("Please use FILE mode."); return -1; } default: break; } } catch (ParseException e) { usage(); rc = ReturnCode.PARSE_EXCEPTION; PigStatsUtil.setErrorMessage(e.getMessage()); PigStatsUtil.setErrorThrowable(e); } catch (org.apache.pig.tools.parameters.ParseException e) { // usage(); rc = ReturnCode.PARSE_EXCEPTION; PigStatsUtil.setErrorMessage(e.getMessage()); PigStatsUtil.setErrorThrowable(e); } catch (IOException e) { if (e instanceof PigException) { PigException pe = (PigException) e; rc = (pe.retriable()) ? ReturnCode.RETRIABLE_EXCEPTION : ReturnCode.PIG_EXCEPTION; PigStatsUtil.setErrorMessage(pe.getMessage()); PigStatsUtil.setErrorCode(pe.getErrorCode()); } else { rc = ReturnCode.IO_EXCEPTION; PigStatsUtil.setErrorMessage(e.getMessage()); } PigStatsUtil.setErrorThrowable(e); if (!pigoutCalled) { LogUtils.writeLog(e, logFileName, log, verbose, "Error before Pig is launched"); } } catch (Throwable e) { rc = ReturnCode.THROWABLE_EXCEPTION; PigStatsUtil.setErrorMessage(e.getMessage()); PigStatsUtil.setErrorThrowable(e); e.printStackTrace(); if (!pigoutCalled) { LogUtils.writeLog(e, logFileName, log, verbose, "Error before Pig is launched"); } } finally { // clear temp files FileLocalizer.deleteTempFiles(); PerformanceTimerFactory.getPerfTimerFactory().dumpTimers(); } return rc; } protected static PigProgressNotificationListener makeListener(Properties properties) { try { return PigContext.instantiateObjectFromParams(ConfigurationUtil.toConfiguration(properties), PROGRESS_NOTIFICATION_LISTENER_KEY, PROGRESS_NOTIFICATION_LISTENER_ARG_KEY, PigProgressNotificationListener.class); } catch (ExecException e) { throw new RuntimeException(e); } } public static boolean dryrun(String scriptFile, PigContext pigContext) throws RecognitionException, IOException { BufferedReader rd = new BufferedReader(new FileReader(scriptFile)); DryRunGruntParser dryrun = new DryRunGruntParser(rd, scriptFile, pigContext); boolean hasMacro = dryrun.parseStopOnError(); if (hasMacro) { String expandedFile = scriptFile.replace(".substituted", ".expanded"); BufferedWriter fw = new BufferedWriter(new FileWriter(expandedFile)); fw.append(dryrun.getResult()); fw.close(); } return hasMacro; } //TODO jz: log4j.properties should be used instead private static void configureLog4J(Properties properties, PigContext pigContext) { // TODO Add a file appender for the logs // TODO Need to create a property in the properties file for it. // sgroschupf, 25Feb2008: this method will be obsolete with PIG-115. String log4jconf = properties.getProperty(LOG4J_CONF); String trueString = "true"; boolean brief = trueString.equalsIgnoreCase(properties.getProperty(BRIEF)); Level logLevel = Level.INFO; String logLevelString = properties.getProperty(DEBUG); if (logLevelString != null) { logLevel = Level.toLevel(logLevelString, Level.INFO); } Properties props = new Properties(); FileReader propertyReader = null; if (log4jconf != null) { try { propertyReader = new FileReader(log4jconf); props.load(propertyReader); } catch (IOException e) { System.err.println("Warn: Cannot open log4j properties file, use default"); } finally { if (propertyReader != null) try { propertyReader.close(); } catch (Exception e) { } } } if (props.size() == 0) { props.setProperty("log4j.logger.org.apache.pig", logLevel.toString()); if ((logLevelString = System.getProperty("pig.logfile.level")) == null) { props.setProperty("log4j.rootLogger", "INFO, PIGCONSOLE"); } else { logLevel = Level.toLevel(logLevelString, Level.INFO); props.setProperty("log4j.logger.org.apache.pig", logLevel.toString()); props.setProperty("log4j.rootLogger", "INFO, PIGCONSOLE, F"); props.setProperty("log4j.appender.F", "org.apache.log4j.RollingFileAppender"); props.setProperty("log4j.appender.F.File", properties.getProperty("pig.logfile")); props.setProperty("log4j.appender.F.layout", "org.apache.log4j.PatternLayout"); props.setProperty("log4j.appender.F.layout.ConversionPattern", brief ? "%m%n" : "%d [%t] %-5p %c - %m%n"); } props.setProperty("log4j.appender.PIGCONSOLE", "org.apache.log4j.ConsoleAppender"); props.setProperty("log4j.appender.PIGCONSOLE.target", "System.err"); props.setProperty("log4j.appender.PIGCONSOLE.layout", "org.apache.log4j.PatternLayout"); props.setProperty("log4j.appender.PIGCONSOLE.layout.ConversionPattern", brief ? "%m%n" : "%d [%t] %-5p %c - %m%n"); } PropertyConfigurator.configure(props); logLevel = Logger.getLogger("org.apache.pig").getLevel(); if (logLevel == null) { logLevel = Logger.getLogger("org.apache.pig").getEffectiveLevel(); } Properties backendProps = pigContext.getLog4jProperties(); backendProps.setProperty("log4j.logger.org.apache.pig", logLevel.toString()); pigContext.setLog4jProperties(backendProps); pigContext.setDefaultLogLevel(logLevel); } private static int getReturnCodeForStats(int[] stats) { return (stats[1] == 0) ? ReturnCode.SUCCESS // no failed jobs : (stats[0] == 0) ? ReturnCode.FAILURE // no succeeded jobs : ReturnCode.PARTIAL_FAILURE; // some jobs have failed } private static List<String> fetchRemoteParamFiles(List<String> paramFiles, Properties properties) throws IOException { List<String> paramFiles2 = new ArrayList<String>(); for (String param : paramFiles) { FileLocalizer.FetchFileRet localFileRet = FileLocalizer.fetchFile(properties, param); paramFiles2.add(localFileRet.file.getAbsolutePath()); } return paramFiles2; } // returns the stream of final pig script to be passed to Grunt private static BufferedReader runParamPreprocessor(PigContext context, BufferedReader origPigScript, String scriptFile, boolean createFile) throws org.apache.pig.tools.parameters.ParseException, IOException { if (createFile) { return context.doParamSubstitutionOutputToFile(origPigScript, scriptFile); } else { String substituted = context.doParamSubstitution(origPigScript); return new BufferedReader(new StringReader(substituted)); } } /** * Returns the major version of Pig being run. */ public static String getMajorVersion() { return majorVersion; } /** * Returns the major version of the Pig build being run. */ public static String getMinorVersion() { return minorVersion; } /** * Returns the patch version of the Pig build being run. */ public static String getPatchVersion() { return patchVersion; } /** * Returns the svn revision number of the Pig build being run. */ public static String getSvnRevision() { return svnRevision; } /** * Returns the built time of the Pig build being run. */ public static String getBuildTime() { return buildTime; } public static void usage() { // The following usage help must be revised... // 8.23.2013 System.out.println("\n"); System.out.println("USAGE: Pig [options] [-] : Run interactively in grunt shell."); System.out.println(" Pig [options] -e[xecute] cmd [cmd ...] : Run cmd(s)."); System.out.println(" Pig [options] [-f[ile]] file : Run cmds found in file."); System.out.println(" options include:"); System.out.println(" -4, -log4jconf - Log4j configuration file, overrides log conf"); System.out.println(" -b, -brief - Brief logging (no timestamps)"); System.out.println(" -c, -check - Syntax check"); System.out.println(" -d, -debug - Debug level, INFO is default"); System.out.println(" -e, -execute - Commands to execute (within quotes)"); System.out.println(" -f, -file - Path to the script to execute"); System.out.println(" -g, -embedded - ScriptEngine classname or keyword for the ScriptEngine"); System.out .println(" -h, -help - Display this message. You can specify topic to get help for that topic."); System.out.println(" properties is the only topic currently supported: -h properties."); System.out.println(" -i, -version - Display version information"); System.out .println(" -l, -logfile - Path to client side log file; default is current working directory."); System.out.println(" -m, -param_file - Path to the parameter file"); System.out.println(" -p, -param - Key value pair of the form param=val"); System.out .println(" -r, -dryrun - Produces script with substituted parameters. Script is not executed."); System.out.println(" -t, -optimizer_off - Turn optimizations off. The following values are supported:"); System.out.println(" SplitFilter - Split filter conditions"); System.out.println(" PushUpFilter - Filter as early as possible"); System.out.println(" MergeFilter - Merge filter conditions"); System.out.println(" PushDownForeachFlatten - Join or explode as late as possible"); System.out.println(" LimitOptimizer - Limit as early as possible"); System.out.println(" ColumnMapKeyPrune - Remove unused data"); System.out.println(" AddForEach - Add ForEach to remove unneeded columns"); System.out.println(" MergeForEach - Merge adjacent ForEach"); System.out.println(" GroupByConstParallelSetter - Force parallel 1 for \"group all\" statement"); System.out.println(" All - Disable all optimizations"); System.out.println( " All optimizations listed here are enabled by default. Optimization values are case insensitive."); System.out.println(" -v, -verbose - Print all error messages to screen"); System.out.println(" -w, -warning - Turn warning logging on; also turns warning aggregation off"); System.out.println(" -x, -exectype - Set execution mode: local|single|multi, default is multi."); System.out.println(" -F, -stop_on_failure - Aborts execution on the first failed job; default is off"); System.out.println(" -M, -no_multiquery - Turn multiquery optimization off; default is on"); System.out.println(" -P, -propertyFile - Path to property file"); System.out.println( " -printCmdDebug - Overrides anything else and prints the actual command used to run Pig, including"); System.out.println(" any environment variables that are set by the pig command."); } public static String getVersionString() { // return "PigOut version " + version + " (r" + svnRevision + ") \ncompiled "+buildTime; return "PigOut version 0.1"; } public static String validateLogFile(String logFileName, String scriptName) { String strippedDownScriptName = null; // script name if (scriptName != null) { File scriptFile = new File(scriptName); if (!scriptFile.isDirectory()) { String scriptFileAbsPath; try { scriptFileAbsPath = scriptFile.getCanonicalPath(); strippedDownScriptName = getFileFromCanonicalPath(scriptFileAbsPath); } catch (IOException ioe) { log.warn("Could not compute canonical path to the script file " + ioe.getMessage()); strippedDownScriptName = null; } } } String defaultLogFileName = (strippedDownScriptName == null ? "pigout_" : strippedDownScriptName) + new Date().getTime() + ".log"; File logFile; if (logFileName != null) { logFile = new File(logFileName); //Check if the file name is a directory //append the default file name to the file if (logFile.isDirectory()) { if (logFile.canWrite()) { try { logFileName = logFile.getCanonicalPath() + File.separator + defaultLogFileName; } catch (IOException ioe) { log.warn("Could not compute canonical path to the log file " + ioe.getMessage()); return null; } return logFileName; } else { log.warn("Need write permission in the directory: " + logFileName + " to create log file."); return null; } } else { //we have a relative path or an absolute path to the log file //check if we can write to the directory where this file is/will be stored if (logFile.exists()) { if (logFile.canWrite()) { try { logFileName = new File(logFileName).getCanonicalPath(); } catch (IOException ioe) { log.warn("Could not compute canonical path to the log file " + ioe.getMessage()); return null; } return logFileName; } else { //do not have write permissions for the log file //bail out with an error message log.warn("Cannot write to file: " + logFileName + ". Need write permission."); return logFileName; } } else { logFile = logFile.getParentFile(); if (logFile != null) { //if the directory is writable we are good to go if (logFile.canWrite()) { try { logFileName = new File(logFileName).getCanonicalPath(); } catch (IOException ioe) { log.warn("Could not compute canonical path to the log file " + ioe.getMessage()); return null; } return logFileName; } else { log.warn("Need write permission in the directory: " + logFile + " to create log file."); return logFileName; } } //end if logFile != null else is the default in fall through } //end else part of logFile.exists() } //end else part of logFile.isDirectory() } //end if logFileName != null //file name is null or its in the current working directory //revert to the current working directory String currDir = System.getProperty("user.dir"); logFile = new File(currDir); logFileName = currDir + File.separator + (logFileName == null ? defaultLogFileName : logFileName); if (logFile.canWrite()) { return logFileName; } log.warn("Cannot write to log file: " + logFileName); return null; } private static String getFileFromCanonicalPath(String canonicalPath) { return canonicalPath.substring(canonicalPath.lastIndexOf(File.separator)); } private static SupportedScriptLang determineScriptType(String file) throws IOException { return ScriptEngine.getSupportedScriptLang(file); } private static int runEmbeddedScript(PigContext pigContext, String file, String engine) throws IOException { log.info("Run embedded script: " + engine); pigContext.connect(); ScriptEngine scriptEngine = ScriptEngine.getInstance(engine); Map<String, List<PigStats>> statsMap = scriptEngine.run(pigContext, file); PigStatsUtil.setStatsMap(statsMap); int failCount = 0; int totalCount = 0; for (List<PigStats> lst : statsMap.values()) { if (lst != null && !lst.isEmpty()) { for (PigStats stats : lst) { if (!stats.isSuccessful()) failCount++; totalCount++; } } } return (totalCount > 0 && failCount == totalCount) ? ReturnCode.FAILURE : (failCount > 0) ? ReturnCode.PARTIAL_FAILURE : ReturnCode.SUCCESS; } }