/**
* 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.backend.hadoop.executionengine.tez.plan;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.PrintStream;
import java.net.URI;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.hadoop.yarn.api.records.LocalResource;
import org.apache.pig.backend.hadoop.executionengine.tez.TezResourceManager;
import org.apache.pig.impl.PigContext;
import org.apache.pig.impl.plan.OperatorKey;
import org.apache.pig.impl.plan.OperatorPlan;
import org.apache.pig.impl.plan.PlanException;
import org.apache.pig.impl.plan.VisitorException;
import org.apache.pig.impl.util.JarManager;
public class TezPlanContainer extends OperatorPlan<TezPlanContainerNode> {
private static final long serialVersionUID = 1L;
private PigContext pigContext;
private String jobName;
private long dagId = 0;
//Incrementing static counter if multiple pig scripts have same name
private static long scopeId = 0;
public TezPlanContainer(PigContext pigContext) {
this.pigContext = pigContext;
this.jobName = pigContext.getProperties().getProperty(PigContext.JOB_NAME, "pig");
}
// Add the Pig jar and the UDF jars as AM resources (all DAG's in the planContainer
// will use them for simplicity). This differs from MR Pig, where they are added to
// the job jar.
public Map<String, LocalResource> getLocalResources() throws Exception {
Set<URI> jarLists = new HashSet<URI>();
for (String jarFile : JarManager.getDefaultJars()) {
jarLists.add(new File(jarFile).toURI());
}
// In MR Pig the extra jars and script jars get put in Distributed Cache, but
// in Tez we'll add them as local resources.
for (URL jarUrl : pigContext.extraJars) {
jarLists.add(jarUrl.toURI());
}
for (String jarFile : pigContext.scriptJars) {
jarLists.add(new File(jarFile).toURI());
}
// Script files for non-Java UDF's are added to the Job.jar by the JarManager class,
// except for Groovy files, which need to be explicitly added as local resources due
// to the GroovyScriptEngine (see JarManager.java for comments).
for (Map.Entry<String, File> scriptFile : pigContext.getScriptFiles().entrySet()) {
if (scriptFile.getKey().endsWith(".groovy")) {
jarLists.add(scriptFile.getValue().toURI());
}
}
TezPlanContainerUDFCollector tezPlanContainerUDFCollector = new TezPlanContainerUDFCollector(this);
tezPlanContainerUDFCollector.visit();
Set<String> udfs = tezPlanContainerUDFCollector.getUdfs();
for (String func : udfs) {
Class<?> clazz = pigContext.getClassForAlias(func);
if (clazz != null) {
String jarName = JarManager.findContainingJar(clazz);
if (jarName == null) {
// It's possible that clazz is not registered by an external
// jar. For eg, in unit tests, UDFs that are not in default
// packages may be used. In that case, we should skip it to
// avoid NPE.
continue;
}
URI jarUri = new File(jarName).toURI();
jarLists.add(jarUri);
}
}
File scriptUDFJarFile = JarManager.createPigScriptUDFJar(pigContext);
if (scriptUDFJarFile != null) {
jarLists.add(scriptUDFJarFile.toURI());
}
return TezResourceManager.getInstance().addTezResources(jarLists);
}
public TezPlanContainerNode getNextPlan(List<TezOperPlan> processedPlans) {
synchronized(this) {
while (getRoots()!=null && !getRoots().isEmpty()) {
TezPlanContainerNode currentPlan = null;
for (TezPlanContainerNode plan : getRoots()) {
if (!processedPlans.contains(plan.getTezOperPlan())) {
currentPlan = plan;
break;
}
}
if (currentPlan!=null) {
return currentPlan;
} else {
try {
wait();
} catch (InterruptedException e) {
}
}
}
}
return null;
}
public void addPlan(TezOperPlan plan) throws PlanException {
TezPlanContainerNode node = new TezPlanContainerNode(generateNodeOperatorKey(), plan);
this.add(node);
this.split(node);
}
public void updatePlan(TezOperPlan plan, boolean succ) {
TezPlanContainerNode tezPlanContainerNode = new TezPlanContainerNode(
generateNodeOperatorKey(), plan);
synchronized(this) {
if (succ) {
remove(tezPlanContainerNode);
} else {
// job fail
trimBelow(tezPlanContainerNode);
remove(tezPlanContainerNode);
}
notify();
}
}
public void split(TezPlanContainerNode planNode) throws PlanException {
TezOperPlan tezOperPlan = planNode.getTezOperPlan();
TezOperator operToSegment = null;
List<TezOperator> succs = new ArrayList<TezOperator>();
for (TezOperator tezOper : tezOperPlan) {
if (tezOper.needSegmentBelow() && tezOperPlan.getSuccessors(tezOper)!=null) {
operToSegment = tezOper;
succs.addAll(tezOperPlan.getSuccessors(tezOper));
break;
}
}
if (operToSegment != null) {
for (TezOperator succ : succs) {
tezOperPlan.disconnect(operToSegment, succ);
TezOperPlan newOperPlan = new TezOperPlan();
List<TezPlanContainerNode> containerSuccs = new ArrayList<TezPlanContainerNode>();
if (getSuccessors(planNode)!=null) {
containerSuccs.addAll(getSuccessors(planNode));
}
tezOperPlan.moveTree(succ, newOperPlan);
TezPlanContainerNode newPlanNode = new TezPlanContainerNode(generateNodeOperatorKey(), newOperPlan);
add(newPlanNode);
for (TezPlanContainerNode containerNodeSucc : containerSuccs) {
disconnect(planNode, containerNodeSucc);
connect(newPlanNode, containerNodeSucc);
}
connect(planNode, newPlanNode);
split(newPlanNode);
}
split(planNode);
}
}
private synchronized OperatorKey generateNodeOperatorKey() {
OperatorKey opKey = new OperatorKey(jobName + "-" + dagId + "_scope", scopeId);
scopeId++;
dagId++;
return opKey;
}
public static void resetScope() {
scopeId = 0;
}
@Override
public String toString() {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
PrintStream ps = new PrintStream(baos);
TezPlanContainerPrinter printer = new TezPlanContainerPrinter(ps, this);
printer.setVerbose(true);
try {
printer.visit();
} catch (VisitorException e) {
throw new RuntimeException(e);
}
return baos.toString();
}
}