/*
* 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 org.apache.pig.tools.grunt;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintStream;
import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.AbstractList;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import jline.ConsoleReader;
import jline.ConsoleReaderInputStream;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FsShell;
import org.apache.hadoop.mapred.JobClient;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.JobID;
import org.apache.hadoop.mapred.RunningJob;
import org.apache.pig.LoadFunc;
import org.apache.pig.PigServer;
import org.apache.pig.backend.datastorage.ContainerDescriptor;
import org.apache.pig.backend.datastorage.DataStorage;
import org.apache.pig.backend.datastorage.DataStorageException;
import org.apache.pig.backend.datastorage.ElementDescriptor;
import org.apache.pig.backend.executionengine.ExecException;
import org.apache.pig.backend.hadoop.datastorage.ConfigurationUtil;
import org.apache.pig.backend.hadoop.datastorage.HDataStorage;
import org.apache.pig.backend.hadoop.executionengine.HExecutionEngine;
import org.apache.pig.data.Tuple;
import org.apache.pig.impl.io.FileLocalizer;
import org.apache.pig.impl.io.FileLocalizer.FetchFileRet;
import org.apache.pig.impl.util.LogUtils;
import org.apache.pig.impl.util.TupleFormat;
import org.apache.pig.tools.parameters.ParameterSubstitutionPreprocessor;
import org.apache.pig.tools.pigscript.parser.ParseException;
import org.apache.pig.tools.pigscript.parser.PigScriptParser;
import org.apache.pig.tools.pigscript.parser.PigScriptParserTokenManager;
import org.apache.pig.tools.pigstats.JobStats;
import org.apache.pig.tools.pigstats.PigStats;
import org.apache.pig.tools.pigstats.PigStats.JobGraph;
import org.fusesource.jansi.Ansi;
import org.fusesource.jansi.AnsiConsole;
@SuppressWarnings("deprecation")
public class GruntParser extends PigScriptParser {
private static final Log log = LogFactory.getLog(GruntParser.class);
public GruntParser(Reader stream) {
super(stream);
init();
}
public GruntParser(InputStream stream, String encoding) {
super(stream, encoding);
init();
}
public GruntParser(InputStream stream) {
super(stream);
init();
}
public GruntParser(PigScriptParserTokenManager tm) {
super(tm);
init();
}
private void init() {
mDone = false;
mLoadOnly = false;
mExplain = null;
mScriptIllustrate = false;
}
@Override
public void setInteractive(boolean isInteractive){
super.setInteractive(isInteractive);
if(isInteractive){
setValidateEachStatement(true);
}
}
public void setValidateEachStatement(boolean b) {
mPigServer.setValidateEachStatement(b);
}
private void setBatchOn() {
mPigServer.setBatchOn();
}
private void executeBatch() throws IOException {
if (mPigServer.isBatchOn()) {
if (mExplain != null) {
explainCurrentBatch();
}
if (!mLoadOnly) {
mPigServer.executeBatch();
PigStats stats = PigStats.get();
JobGraph jg = stats.getJobGraph();
Iterator<JobStats> iter = jg.iterator();
while (iter.hasNext()) {
JobStats js = iter.next();
if (!js.isSuccessful()) {
mNumFailedJobs++;
Exception exp = (js.getException() != null) ? js.getException()
: new ExecException(
"Job failed, hadoop does not return any error message",
2244);
LogUtils.writeLog(exp,
mPigServer.getPigContext().getProperties().getProperty("pig.logfile"),
log,
"true".equalsIgnoreCase(mPigServer.getPigContext().getProperties().getProperty("verbose")),
"Pig Stack Trace");
} else {
mNumSucceededJobs++;
}
}
}
}
}
private void discardBatch() throws IOException {
if (mPigServer.isBatchOn()) {
mPigServer.discardBatch();
}
}
public int[] parseStopOnError() throws IOException, ParseException
{
return parseStopOnError(false);
}
/**
* Parses Pig commands in either interactive mode or batch mode.
* In interactive mode, executes the plan right away whenever a
* STORE command is encountered.
*
* @throws IOException, ParseException
*/
public int[] parseStopOnError(boolean sameBatch) throws IOException, ParseException
{
if (mPigServer == null) {
throw new IllegalStateException();
}
if (!mInteractive && !sameBatch) {
setBatchOn();
}
try {
prompt();
mDone = false;
while(!mDone) {
parse();
}
if (!sameBatch) {
executeBatch();
}
} finally {
if (!sameBatch) {
discardBatch();
}
}
int [] res = { mNumSucceededJobs, mNumFailedJobs };
return res;
}
public void setLoadOnly(boolean loadOnly)
{
mLoadOnly = loadOnly;
}
public void setParams(PigServer pigServer)
{
mPigServer = pigServer;
mDfs = mPigServer.getPigContext().getDfs();
mLfs = mPigServer.getPigContext().getLfs();
mConf = mPigServer.getPigContext().getProperties();
shell = new FsShell(ConfigurationUtil.toConfiguration(mConf));
// TODO: this violates the abstraction layer decoupling between
// front end and back end and needs to be changed.
// Right now I am not clear on how the Job Id comes from to tell
// the back end to kill a given job (mJobClient is used only in
// processKill)
//
HExecutionEngine execEngine = mPigServer.getPigContext().getExecutionEngine();
mJobConf = execEngine.getJobConf();
}
public void setScriptIllustrate() {
mScriptIllustrate = true;
}
@Override
public void prompt()
{
if (mInteractive) {
mConsoleReader.setDefaultPrompt("grunt> ");
}
}
@Override
protected void quit()
{
mDone = true;
}
public boolean isDone() {
return mDone;
}
/*
* parseOnly method added for supporting penny
*/
public void parseOnly() throws IOException, ParseException {
if (mPigServer == null) {
throw new IllegalStateException();
}
mDone = false;
while(!mDone) {
parse();
}
}
@Override
protected void processDescribe(String alias) throws IOException {
String nestedAlias = null;
if(mExplain == null) { // process only if not in "explain" mode
if(alias==null) {
alias = mPigServer.getPigContext().getLastAlias();
// if describe is used immediately after launching grunt shell then
// last defined alias will be null
if (alias == null) {
throw new IOException(
"No previously defined alias found. Please define an alias and use 'describe' operator.");
}
}
if(alias.contains("::")) {
nestedAlias = alias.substring(alias.indexOf("::") + 2);
alias = alias.substring(0, alias.indexOf("::"));
mPigServer.dumpSchemaNested(alias, nestedAlias);
}
else {
if ("@".equals(alias)) {
alias = mPigServer.getLastRel();
}
mPigServer.dumpSchema(alias);
}
} else {
log.warn("'describe' statement is ignored while processing 'explain -script' or '-check'");
}
}
@Override
protected void processExplain(String alias, String script, boolean isVerbose,
String format, String target,
List<String> params, List<String> files)
throws IOException, ParseException {
if (alias == null && script == null) {
alias = mPigServer.getPigContext().getLastAlias();
// if explain is used immediately after launching grunt shell then
// last defined alias will be null
if (alias == null) {
throw new ParseException("'explain' statement must be on an alias or on a script.");
}
}
if ("@".equals(alias)) {
alias = mPigServer.getLastRel();
}
processExplain(alias, script, isVerbose, format, target, params, files,
false);
}
protected void processExplain(String alias, String script, boolean isVerbose,
String format, String target,
List<String> params, List<String> files,
boolean dontPrintOutput)
throws IOException, ParseException {
if (null != mExplain) {
return;
}
try {
mExplain = new ExplainState(alias, target, script, isVerbose, format);
if (script != null) {
if (!"true".equalsIgnoreCase(mPigServer.
getPigContext()
.getProperties().
getProperty("opt.multiquery","true"))) {
throw new ParseException("Cannot explain script if multiquery is disabled.");
}
setBatchOn();
try {
loadScript(script, true, true, false, params, files);
} catch(IOException e) {
discardBatch();
throw e;
} catch (ParseException e) {
discardBatch();
throw e;
}
}
mExplain.mLast = true;
explainCurrentBatch(dontPrintOutput);
} finally {
if (script != null) {
discardBatch();
}
mExplain = null;
}
}
protected void explainCurrentBatch() throws IOException {
explainCurrentBatch(false);
}
/**
* A {@link PrintStream} implementation which does not write anything
* Used with '-check' command line option to pig Main
* (through {@link GruntParser#explainCurrentBatch(boolean) } )
*/
static class NullPrintStream extends PrintStream {
public NullPrintStream(String fileName) throws FileNotFoundException {
super(fileName);
}
@Override
public void write(byte[] buf, int off, int len) {}
@Override
public void write(int b) {}
@Override
public void write(byte [] b) {}
}
protected void explainCurrentBatch(boolean dontPrintOutput) throws IOException {
PrintStream lp = (dontPrintOutput) ? new NullPrintStream("dummy") : System.out;
PrintStream pp = (dontPrintOutput) ? new NullPrintStream("dummy") : System.out;
PrintStream ep = (dontPrintOutput) ? new NullPrintStream("dummy") : System.out;
if (!(mExplain.mLast && mExplain.mCount == 0)) {
if (mPigServer.isBatchEmpty()) {
return;
}
}
mExplain.mCount++;
boolean markAsExecuted = (mExplain.mScript != null);
if (mExplain.mTarget != null) {
File file = new File(mExplain.mTarget);
if (file.isDirectory()) {
String sCount = (mExplain.mLast && mExplain.mCount == 1)?"":"_"+mExplain.mCount;
lp = new PrintStream(new File(file, "logical_plan-"+mExplain.mTime+sCount+"."+mExplain.mFormat));
pp = new PrintStream(new File(file, "physical_plan-"+mExplain.mTime+sCount+"."+mExplain.mFormat));
ep = new PrintStream(new File(file, "exec_plan-"+mExplain.mTime+sCount+"."+mExplain.mFormat));
mPigServer.explain(mExplain.mAlias, mExplain.mFormat,
mExplain.mVerbose, markAsExecuted, lp, pp, ep);
lp.close();
pp.close();
ep.close();
}
else {
boolean append = !(mExplain.mCount==1);
lp = pp = ep = new PrintStream(new FileOutputStream(mExplain.mTarget, append));
mPigServer.explain(mExplain.mAlias, mExplain.mFormat,
mExplain.mVerbose, markAsExecuted, lp, pp, ep);
lp.close();
}
}
else {
mPigServer.explain(mExplain.mAlias, mExplain.mFormat,
mExplain.mVerbose, markAsExecuted, lp, pp, ep);
}
}
@Override
protected void printAliases() throws IOException {
if(mExplain == null) { // process only if not in "explain" mode
mPigServer.printAliases();
} else {
log.warn("'aliases' statement is ignored while processing 'explain -script' or '-check'");
}
}
@Override
protected void printClear() {
AnsiConsole.systemInstall();
Ansi ansi = Ansi.ansi();
System.out.println( ansi.eraseScreen() );
System.out.println( ansi.cursor(0, 0) );
AnsiConsole.systemUninstall();
}
@Override
protected void processRegister(String jar) throws IOException {
mPigServer.registerJar(jar);
}
@Override
protected void processRegister(String path, String scriptingLang, String namespace) throws IOException, ParseException {
if(path.endsWith(".jar")) {
if(scriptingLang != null || namespace != null) {
throw new ParseException("Cannot register a jar with a scripting language or namespace");
}
mPigServer.registerJar(path);
}
else {
mPigServer.registerCode(path, scriptingLang, namespace);
}
}
private String runPreprocessor(String script, List<String> params,
List<String> files)
throws IOException, ParseException {
ParameterSubstitutionPreprocessor psp = new ParameterSubstitutionPreprocessor(50);
StringWriter writer = new StringWriter();
try{
psp.genSubstitutedFile(new BufferedReader(new FileReader(script)),
writer,
params.size() > 0 ? params.toArray(new String[0]) : null,
files.size() > 0 ? files.toArray(new String[0]) : null);
} catch (org.apache.pig.tools.parameters.ParseException pex) {
throw new ParseException(pex.getMessage());
}
return writer.toString();
}
@Override
protected void processScript(String script, boolean batch,
List<String> params, List<String> files)
throws IOException, ParseException {
if(mExplain == null) { // process only if not in "explain" mode
if (script == null) {
executeBatch();
return;
}
if (batch) {
setBatchOn();
mPigServer.setJobName(script);
try {
loadScript(script, true, false, mLoadOnly, params, files);
executeBatch();
} finally {
discardBatch();
}
} else {
loadScript(script, false, false, mLoadOnly, params, files);
}
} else {
log.warn("'run/exec' statement is ignored while processing 'explain -script' or '-check'");
}
}
private void loadScript(String script, boolean batch, boolean loadOnly, boolean illustrate,
List<String> params, List<String> files)
throws IOException, ParseException {
Reader inputReader;
ConsoleReader reader;
boolean interactive;
try {
FetchFileRet fetchFile = FileLocalizer.fetchFile(mConf, script);
String cmds = runPreprocessor(fetchFile.file.getAbsolutePath(), params, files);
if (mInteractive && !batch) { // Write prompt and echo commands
// Console reader treats tabs in a special way
cmds = cmds.replaceAll("\t"," ");
reader = new ConsoleReader(new ByteArrayInputStream(cmds.getBytes()),
new OutputStreamWriter(System.out));
reader.setHistory(mConsoleReader.getHistory());
InputStream in = new ConsoleReaderInputStream(reader);
inputReader = new BufferedReader(new InputStreamReader(in));
interactive = true;
} else { // Quietly parse the statements
inputReader = new StringReader(cmds);
reader = null;
interactive = false;
}
} catch (FileNotFoundException fnfe) {
throw new ParseException("File not found: " + script);
} catch (SecurityException se) {
throw new ParseException("Cannot access file: " + script);
}
GruntParser parser = new GruntParser(inputReader);
parser.setParams(mPigServer);
parser.setConsoleReader(reader);
parser.setInteractive(interactive);
parser.setLoadOnly(loadOnly);
if (illustrate)
parser.setScriptIllustrate();
parser.mExplain = mExplain;
parser.prompt();
while(!parser.isDone()) {
parser.parse();
}
if (interactive) {
System.out.println("");
}
}
@Override
protected void processSet(String key, String value) throws IOException, ParseException {
if (key.equals("debug"))
{
if (value.equals("on"))
mPigServer.debugOn();
else if (value.equals("off"))
mPigServer.debugOff();
else
throw new ParseException("Invalid value " + value + " provided for " + key);
}
else if (key.equals("job.name"))
{
mPigServer.setJobName(value);
}
else if (key.equals("job.priority"))
{
mPigServer.setJobPriority(value);
}
else if (key.equals("stream.skippath")) {
// Validate
File file = new File(value);
if (!file.exists() || file.isDirectory()) {
throw new IOException("Invalid value for stream.skippath:" +
value);
}
mPigServer.addPathToSkip(value);
}
else if (key.equals("default_parallel")) {
// Validate
try {
mPigServer.setDefaultParallel(Integer.parseInt(value));
} catch (NumberFormatException e) {
throw new ParseException("Invalid value for default_parallel");
}
}
else
{
//mPigServer.getPigContext().getProperties().setProperty(key, value);
// PIG-2508 properties need to be managed through JobConf
// since all other code depends on access to properties,
// we need to re-populate from updated JobConf
//java.util.HashSet<?> keysBefore = new java.util.HashSet<Object>(mPigServer.getPigContext().getProperties().keySet());
// set current properties on jobConf
Properties properties = mPigServer.getPigContext().getProperties();
Configuration jobConf = mPigServer.getPigContext().getExecutionEngine().getJobConf();
Enumeration<Object> propertiesIter = properties.keys();
while (propertiesIter.hasMoreElements()) {
String pkey = (String) propertiesIter.nextElement();
String val = properties.getProperty(pkey);
// We do not put user.name, See PIG-1419
if (!pkey.equals("user.name"))
jobConf.set(pkey, val);
}
// set new value, JobConf will handle deprecation etc.
jobConf.set(key, value);
// re-initialize to reflect updated JobConf
properties.clear();
Iterator<Map.Entry<String, String>> iter = jobConf.iterator();
while (iter.hasNext()) {
Map.Entry<String, String> entry = iter.next();
properties.put(entry.getKey(), entry.getValue());
}
//keysBefore.removeAll(mPigServer.getPigContext().getProperties().keySet());
//log.info("PIG-2508: keys dropped from properties: " + keysBefore);
}
}
@Override
protected void processCat(String path) throws IOException
{
if(mExplain == null) { // process only if not in "explain" mode
executeBatch();
try {
byte buffer[] = new byte[65536];
ElementDescriptor dfsPath = mDfs.asElement(path);
int rc;
if (!dfsPath.exists())
throw new IOException("Directory " + path + " does not exist.");
if (mDfs.isContainer(path)) {
ContainerDescriptor dfsDir = (ContainerDescriptor) dfsPath;
Iterator<ElementDescriptor> paths = dfsDir.iterator();
while (paths.hasNext()) {
ElementDescriptor curElem = paths.next();
if (mDfs.isContainer(curElem.toString())) {
continue;
}
InputStream is = curElem.open();
while ((rc = is.read(buffer)) > 0) {
System.out.write(buffer, 0, rc);
}
is.close();
}
}
else {
InputStream is = dfsPath.open();
while ((rc = is.read(buffer)) > 0) {
System.out.write(buffer, 0, rc);
}
is.close();
}
}
catch (DataStorageException e) {
throw new IOException("Failed to Cat: " + path, e);
}
} else {
log.warn("'cat' statement is ignored while processing 'explain -script' or '-check'");
}
}
@Override
protected void processCD(String path) throws IOException
{
ContainerDescriptor container;
if(mExplain == null) { // process only if not in "explain" mode
try {
if (path == null) {
container = mDfs.asContainer(((HDataStorage)mDfs).getHFS().getHomeDirectory().toString());
mDfs.setActiveContainer(container);
}
else
{
container = mDfs.asContainer(path);
if (!container.exists()) {
throw new IOException("Directory " + path + " does not exist.");
}
if (!mDfs.isContainer(path)) {
throw new IOException(path + " is not a directory.");
}
mDfs.setActiveContainer(container);
}
}
catch (DataStorageException e) {
throw new IOException("Failed to change working directory to " +
((path == null) ? (((HDataStorage)mDfs).getHFS().getHomeDirectory().toString())
: (path)), e);
}
} else {
log.warn("'cd' statement is ignored while processing 'explain -script' or '-check'");
}
}
@Override
protected void processDump(String alias) throws IOException
{
if (alias == null) {
alias = mPigServer.getPigContext().getLastAlias();
// if dump is used immediately after launching grunt shell then
// last defined alias will be null
if (alias == null) {
throw new IOException(
"No previously defined alias found. Please define an alias and use 'dump' operator.");
}
}
if(mExplain == null) { // process only if not in "explain" mode
executeBatch();
if ("@".equals(alias)) {
alias = mPigServer.getLastRel();
}
Iterator<Tuple> result = mPigServer.openIterator(alias);
while (result.hasNext())
{
Tuple t = result.next();
System.out.println(TupleFormat.format(t));
}
} else {
log.warn("'dump' statement is ignored while processing 'explain -script' or '-check'");
}
}
@Override
protected void processIllustrate(String alias, String script, String target, List<String> params, List<String> files) throws IOException, ParseException
{
if (mScriptIllustrate)
throw new ParseException("'illustrate' statement can not appear in a script that is illustrated opon.");
if ((alias != null) && (script != null))
throw new ParseException("'illustrate' statement on an alias does not work when a script is in effect");
else if (mExplain != null)
log.warn("'illustrate' statement is ignored while processing 'explain -script' or '-check'");
else {
try {
if (script != null) {
if (!"true".equalsIgnoreCase(mPigServer.
getPigContext()
.getProperties().
getProperty("opt.multiquery","true"))) {
throw new ParseException("Cannot explain script if multiquery is disabled.");
}
setBatchOn();
try {
loadScript(script, true, true, true, params, files);
} catch(IOException e) {
discardBatch();
throw e;
} catch (ParseException e) {
discardBatch();
throw e;
}
} else if (alias == null) {
alias = mPigServer.getPigContext().getLastAlias();
// if illustrate is used immediately after launching grunt shell then
// last defined alias will be null
if (alias == null) {
throw new ParseException("'illustrate' statement must be on an alias or on a script.");
}
}
if ("@".equals(alias)) {
alias = mPigServer.getLastRel();
}
mPigServer.getExamples(alias);
} finally {
if (script != null) {
discardBatch();
}
}
}
}
@Override
protected void processKill(String jobid) throws IOException
{
if (mJobConf != null) {
JobClient jc = new JobClient(mJobConf);
JobID id = JobID.forName(jobid);
RunningJob job = jc.getJob(id);
if (job == null)
System.out.println("Job with id " + jobid + " is not active");
else
{
job.killJob();
log.info("Kill " + id + " submitted.");
}
}
}
@Override
protected void processLS(String path) throws IOException
{
if(mExplain == null) { // process only if not in "explain" mode
try {
ElementDescriptor pathDescriptor;
if (path == null) {
pathDescriptor = mDfs.getActiveContainer();
}
else {
pathDescriptor = mDfs.asElement(path);
}
if (!pathDescriptor.exists()) {
throw new IOException("File or directory " + path + " does not exist.");
}
if (mDfs.isContainer(pathDescriptor.toString())) {
ContainerDescriptor container = (ContainerDescriptor) pathDescriptor;
Iterator<ElementDescriptor> elems = container.iterator();
while (elems.hasNext()) {
ElementDescriptor curElem = elems.next();
if (mDfs.isContainer(curElem.toString())) {
System.out.println(curElem.toString() + "\t<dir>");
} else {
printLengthAndReplication(curElem);
}
}
} else {
printLengthAndReplication(pathDescriptor);
}
}
catch (DataStorageException e) {
throw new IOException("Failed to LS on " + path, e);
}
} else {
log.warn("'ls' statement is ignored while processing 'explain -script' or '-check'");
}
}
private void printLengthAndReplication(ElementDescriptor elem)
throws IOException {
Map<String, Object> stats = elem.getStatistics();
long replication = (Short) stats
.get(ElementDescriptor.BLOCK_REPLICATION_KEY);
long len = (Long) stats.get(ElementDescriptor.LENGTH_KEY);
System.out.println(elem.toString() + "<r " + replication + ">\t" + len);
}
@Override
protected void processPWD() throws IOException
{
if(mExplain == null) { // process only if not in "explain" mode
System.out.println(mDfs.getActiveContainer().toString());
} else {
log.warn("'pwd' statement is ignored while processing 'explain -script' or '-check'");
}
}
@Override
protected void processHistory(boolean withNumbers) {
mPigServer.printHistory(withNumbers);
}
@Override
protected void printHelp()
{
System.out.println("Commands:");
System.out.println("<pig latin statement>; - See the PigLatin manual for details: http://hadoop.apache.org/pig");
System.out.println("File system commands:");
System.out.println(" fs <fs arguments> - Equivalent to Hadoop dfs command: http://hadoop.apache.org/common/docs/current/hdfs_shell.html");
System.out.println("Diagnostic commands:");
System.out.println(" describe <alias>[::<alias] - Show the schema for the alias. Inner aliases can be described as A::B.");
System.out.println(" explain [-script <pigscript>] [-out <path>] [-brief] [-dot] [-param <param_name>=<param_value>]");
System.out.println(" [-param_file <file_name>] [<alias>] - Show the execution plan to compute the alias or for entire script.");
System.out.println(" -script - Explain the entire script.");
System.out.println(" -out - Store the output into directory rather than print to stdout.");
System.out.println(" -brief - Don't expand nested plans (presenting a smaller graph for overview).");
System.out.println(" -dot - Generate the output in .dot format. Default is text format.");
System.out.println(" -param <param_name - See parameter substitution for details.");
System.out.println(" -param_file <file_name> - See parameter substitution for details.");
System.out.println(" alias - Alias to explain.");
System.out.println(" dump <alias> - Compute the alias and writes the results to stdout.");
System.out.println("Utility Commands:");
System.out.println(" exec [-param <param_name>=param_value] [-param_file <file_name>] <script> - ");
System.out.println(" Execute the script with access to grunt environment including aliases.");
System.out.println(" -param <param_name - See parameter substitution for details.");
System.out.println(" -param_file <file_name> - See parameter substitution for details.");
System.out.println(" script - Script to be executed.");
System.out.println(" run [-param <param_name>=param_value] [-param_file <file_name>] <script> - ");
System.out.println(" Execute the script with access to grunt environment. ");
System.out.println(" -param <param_name - See parameter substitution for details.");
System.out.println(" -param_file <file_name> - See parameter substitution for details.");
System.out.println(" script - Script to be executed.");
System.out.println(" sh <shell command> - Invoke a shell command.");
System.out.println(" kill <job_id> - Kill the hadoop job specified by the hadoop job id.");
System.out.println(" set <key> <value> - Provide execution parameters to Pig. Keys and values are case sensitive.");
System.out.println(" The following keys are supported: ");
System.out.println(" default_parallel - Script-level reduce parallelism. Basic input size heuristics used by default.");
System.out.println(" debug - Set debug on or off. Default is off.");
System.out.println(" job.name - Single-quoted name for jobs. Default is PigLatin:<script name>");
System.out.println(" job.priority - Priority for jobs. Values: very_low, low, normal, high, very_high. Default is normal");
System.out.println(" stream.skippath - String that contains the path. This is used by streaming.");
System.out.println(" any hadoop property.");
System.out.println(" help - Display this message.");
System.out.println(" history [-n] - Display the list statements in cache.");
System.out.println(" -n Hide line numbers. ");
System.out.println(" quit - Quit the grunt shell.");
}
@Override
protected void processMove(String src, String dst) throws IOException
{
if(mExplain == null) { // process only if not in "explain" mode
executeBatch();
try {
ElementDescriptor srcPath = mDfs.asElement(src);
ElementDescriptor dstPath = mDfs.asElement(dst);
if (!srcPath.exists()) {
throw new IOException("File or directory " + src + " does not exist.");
}
srcPath.rename(dstPath);
}
catch (DataStorageException e) {
throw new IOException("Failed to move " + src + " to " + dst, e);
}
} else {
log.warn("'mv' statement is ignored while processing 'explain -script' or '-check'");
}
}
@Override
protected void processCopy(String src, String dst) throws IOException
{
if(mExplain == null) { // process only if not in "explain" mode
executeBatch();
try {
ElementDescriptor srcPath = mDfs.asElement(src);
ElementDescriptor dstPath = mDfs.asElement(dst);
srcPath.copy(dstPath, mConf, false);
}
catch (DataStorageException e) {
throw new IOException("Failed to copy " + src + " to " + dst, e);
}
} else {
log.warn("'cp' statement is ignored while processing 'explain -script' or '-check'");
}
}
@Override
protected void processCopyToLocal(String src, String dst) throws IOException
{
if(mExplain == null) { // process only if not in "explain" mode
executeBatch();
try {
ElementDescriptor srcPath = mDfs.asElement(src);
ElementDescriptor dstPath = mLfs.asElement(dst);
srcPath.copy(dstPath, false);
}
catch (DataStorageException e) {
throw new IOException("Failed to copy " + src + "to (locally) " + dst, e);
}
} else {
log.warn("'copyToLocal' statement is ignored while processing 'explain -script' or '-check'");
}
}
@Override
protected void processCopyFromLocal(String src, String dst) throws IOException
{
if(mExplain == null) { // process only if not in "explain" mode
executeBatch();
try {
ElementDescriptor srcPath = mLfs.asElement(src);
ElementDescriptor dstPath = mDfs.asElement(dst);
srcPath.copy(dstPath, false);
}
catch (DataStorageException e) {
throw new IOException("Failed to copy (loally) " + src + "to " + dst, e);
}
} else {
log.warn("'copyFromLocal' statement is ignored while processing 'explain -script' or '-check'");
}
}
@Override
protected void processMkdir(String dir) throws IOException
{
if(mExplain == null) { // process only if not in "explain" mode
ContainerDescriptor dirDescriptor = mDfs.asContainer(dir);
dirDescriptor.create();
} else {
log.warn("'mkdir' statement is ignored while processing 'explain -script' or '-check'");
}
}
@Override
protected void processPig(String cmd) throws IOException
{
int start = 1;
if (!mInteractive) {
start = getLineNumber();
}
if (cmd.charAt(cmd.length() - 1) != ';') {
mPigServer.registerQuery(cmd + ";", start);
}
else {
mPigServer.registerQuery(cmd, start);
}
}
@Override
protected void processRemove(String path, String options ) throws IOException
{
if(mExplain == null) { // process only if not in "explain" mode
ElementDescriptor dfsPath = mDfs.asElement(path);
executeBatch();
if (!dfsPath.exists()) {
if (options == null || !options.equalsIgnoreCase("force")) {
throw new IOException("File or directory " + path + " does not exist.");
}
}
else {
dfsPath.delete();
}
} else {
log.warn("'rm/rmf' statement is ignored while processing 'explain -script' or '-check'");
}
}
@Override
protected void processFsCommand(String[] cmdTokens) throws IOException{
if(mExplain == null) { // process only if not in "explain" mode
executeBatch();
int retCode = -1;
try {
retCode = shell.run(cmdTokens);
} catch (Exception e) {
throw new IOException(e);
}
if (retCode != 0 && !mInteractive) {
String s = LoadFunc.join(
(AbstractList<String>) Arrays.asList(cmdTokens), " ");
throw new IOException("fs command '" + s
+ "' failed. Please check output logs for details");
}
} else {
log.warn("'fs' statement is ignored while processing 'explain -script' or '-check'");
}
}
@Override
protected void processShCommand(String[] cmdTokens) throws IOException{
if(mExplain == null) { // process only if not in "explain" mode
try {
executeBatch();
// For sh command, create a process with the following syntax
// <shell exe> <invoke arg> <command-as-string>
String shellName = "sh";
String shellInvokeArg = "-c";
// Insert cmd /C in front of the array list to execute to
// support built-in shell commands like mkdir on Windows
if (System.getProperty("os.name").startsWith("Windows")) {
shellName = "cmd";
shellInvokeArg = "/C";
}
List<String> stringList = new ArrayList<String>();
stringList.add(shellName);
stringList.add(shellInvokeArg);
StringBuffer commandString = new StringBuffer();
for (String currToken : cmdTokens) {
commandString.append(" ");
commandString.append(currToken);
}
stringList.add(commandString.toString());
String[] newCmdTokens = stringList.toArray(new String[0]);
Process executor = Runtime.getRuntime().exec(newCmdTokens);
StreamPrinter outPrinter = new StreamPrinter(executor.getInputStream(), null, System.out);
StreamPrinter errPrinter = new StreamPrinter(executor.getErrorStream(), null, System.err);
outPrinter.start();
errPrinter.start();
int ret = executor.waitFor();
outPrinter.join();
errPrinter.join();
if (ret != 0 && !mInteractive) {
String s = LoadFunc.join(
(AbstractList<String>) Arrays.asList(cmdTokens), " ");
throw new IOException("sh command '" + s
+ "' failed. Please check output logs for details");
}
} catch (Exception e) {
throw new IOException(e);
}
} else {
log.warn("'sh' statement is ignored while processing 'explain -script' or '-check'");
}
}
public static int runSQLCommand(String hcatBin, String cmd, boolean mInteractive) throws IOException {
String[] tokens = new String[3];
tokens[0] = hcatBin;
tokens[1] = "-e";
tokens[2] = cmd.substring(cmd.indexOf("sql")).substring(4);
// create new environment = environment - HADOOP_CLASSPATH
// This is because of antlr version conflict between Pig and Hive
Map<String, String> envs = System.getenv();
Set<String> envSet = new HashSet<String>();
for (Map.Entry<String, String> entry : envs.entrySet()) {
if (!entry.getKey().equals("HADOOP_CLASSPATH")) {
envSet.add(entry.getKey() + "=" + entry.getValue());
}
}
log.info("Going to run hcat command: " + tokens[2]);
Process executor = Runtime.getRuntime().exec(tokens, envSet.toArray(new String[0]));
StreamPrinter outPrinter = new StreamPrinter(executor.getInputStream(), null, System.out);
StreamPrinter errPrinter = new StreamPrinter(executor.getErrorStream(), null, System.err);
outPrinter.start();
errPrinter.start();
int ret;
try {
ret = executor.waitFor();
outPrinter.join();
errPrinter.join();
if (ret != 0 && !mInteractive) {
throw new IOException("sql command '" + cmd
+ "' failed. ");
}
} catch (InterruptedException e) {
log.warn("Exception raised from sql command " + e.getLocalizedMessage());
}
return 0;
}
@Override
protected void processSQLCommand(String cmd) throws IOException{
if(mExplain == null) { // process only if not in "explain" mode
if (!mPigServer.getPigContext().getProperties().get("pig.sql.type").equals("hcat")) {
throw new IOException("sql command only support hcat currently");
}
if (mPigServer.getPigContext().getProperties().get("hcat.bin")==null) {
throw new IOException("hcat.bin is not defined. Define it to be your hcat script (Usually $HCAT_HOME/bin/hcat");
}
String hcatBin = (String)mPigServer.getPigContext().getProperties().get("hcat.bin");
if (new File("hcat.bin").exists()) {
throw new IOException(hcatBin + " does not exist. Please check your 'hcat.bin' setting in pig.properties.");
}
executeBatch();
runSQLCommand(hcatBin, cmd, mInteractive);
} else {
log.warn("'sql' statement is ignored while processing 'explain -script' or '-check'");
}
}
/**
* StreamPrinter.
*
*/
public static class StreamPrinter extends Thread {
InputStream is;
String type;
PrintStream os;
public StreamPrinter(InputStream is, String type, PrintStream os) {
this.is = is;
this.type = type;
this.os = os;
}
@Override
public void run() {
try {
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line = null;
if (type != null) {
while ((line = br.readLine()) != null) {
os.println(type + ">" + line);
}
} else {
while ((line = br.readLine()) != null) {
os.println(line);
}
}
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
}
private static class ExplainState {
public long mTime;
public int mCount;
public String mAlias;
public String mTarget;
public String mScript;
public boolean mVerbose;
public String mFormat;
public boolean mLast;
public ExplainState(String alias, String target, String script,
boolean verbose, String format) {
mTime = new Date().getTime();
mCount = 0;
mAlias = alias;
mTarget = target;
mScript = script;
mVerbose = verbose;
mFormat = format;
mLast = false;
}
}
private PigServer mPigServer;
private DataStorage mDfs;
private DataStorage mLfs;
private Properties mConf;
private JobConf mJobConf;
private boolean mDone;
private boolean mLoadOnly;
private ExplainState mExplain;
private int mNumFailedJobs;
private int mNumSucceededJobs;
private FsShell shell;
private boolean mScriptIllustrate;
}