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* Licensed to the Apache Software Foundation (ASF) under one
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* distributed with this work for additional information
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* 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,
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* See the License for the specific language governing permissions and
* limitations under the License.
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package org.apache.hadoop.hive.ql.parse.spark;
import org.apache.hadoop.hive.common.ObjectPair;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.ql.exec.DependencyCollectionTask;
import org.apache.hadoop.hive.ql.exec.FileSinkOperator;
import org.apache.hadoop.hive.ql.exec.MapJoinOperator;
import org.apache.hadoop.hive.ql.exec.Operator;
import org.apache.hadoop.hive.ql.exec.ReduceSinkOperator;
import org.apache.hadoop.hive.ql.exec.SMBMapJoinOperator;
import org.apache.hadoop.hive.ql.exec.Task;
import org.apache.hadoop.hive.ql.exec.TaskFactory;
import org.apache.hadoop.hive.ql.exec.UnionOperator;
import org.apache.hadoop.hive.ql.exec.spark.SparkTask;
import org.apache.hadoop.hive.ql.hooks.ReadEntity;
import org.apache.hadoop.hive.ql.hooks.WriteEntity;
import org.apache.hadoop.hive.ql.lib.NodeProcessorCtx;
import org.apache.hadoop.hive.ql.parse.ParseContext;
import org.apache.hadoop.hive.ql.plan.BaseWork;
import org.apache.hadoop.hive.ql.plan.DependencyCollectionWork;
import org.apache.hadoop.hive.ql.plan.MoveWork;
import org.apache.hadoop.hive.ql.plan.OperatorDesc;
import org.apache.hadoop.hive.ql.plan.ReduceWork;
import org.apache.hadoop.hive.ql.plan.SparkEdgeProperty;
import org.apache.hadoop.hive.ql.plan.SparkWork;
import java.io.Serializable;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* GenSparkProcContext maintains information about the tasks and operators
* as we walk the operator tree to break them into SparkTasks.
*
* Cloned from GenTezProcContext.
*
*/
public class GenSparkProcContext implements NodeProcessorCtx {
public final ParseContext parseContext;
public final HiveConf conf;
public final List> moveTask;
// rootTasks is the entry point for all generated tasks
public final List> rootTasks;
public final Set inputs;
public final Set outputs;
// holds the root of the operator tree we're currently processing
// this could be a table scan, but also a join, ptf, etc (i.e.:
// first operator of a reduce task.
public Operator currentRootOperator;
// this is the original parent of the currentRootOperator as we scan
// through the graph. A root operator might have multiple parents and
// we just use this one to remember where we came from in the current
// walk.
public Operator parentOfRoot;
// Spark task we're currently processing
public SparkTask currentTask;
// last work we've processed (in order to hook it up to the current
// one.
public BaseWork preceedingWork;
// map that keeps track of the last operator of a task to the following work
// of this operator. This is used for connecting them later.
public final Map>
leafOpToFollowingWorkInfo;
// a map that keeps track of work that need to be linked while
// traversing an operator tree
public final Map, Map> linkOpWithWorkMap;
// a map to keep track of what reduce sinks have to be hooked up to
// map join work
public final Map> linkWorkWithReduceSinkMap;
// map that says which mapjoin belongs to which work item
public final Map> mapJoinWorkMap;
// Map to keep track of which SMB Join operators and their information to annotate their MapWork with.
public final Map smbMapJoinCtxMap;
// a map to keep track of which root generated which work
public final Map, BaseWork> rootToWorkMap;
// a map to keep track of which child generated with work
public final Map, List> childToWorkMap;
// we need to keep the original list of operators in the map join to know
// what position in the mapjoin the different parent work items will have.
public final Map>> mapJoinParentMap;
// remember the dummy ops we created
public final Map, List>> linkChildOpWithDummyOp;
// used to group dependent tasks for multi table inserts
public final DependencyCollectionTask dependencyTask;
// remember map joins as we encounter them.
public final Set currentMapJoinOperators;
// used to hook up unions
public final Map, BaseWork> unionWorkMap;
public final List currentUnionOperators;
public final Set workWithUnionOperators;
public final Set clonedReduceSinks;
public final Set fileSinkSet;
public final Map> fileSinkMap;
// Alias to operator map, from the semantic analyzer.
// This is necessary as sometimes semantic analyzer's mapping is different than operator's own alias.
public final Map> topOps;
@SuppressWarnings("unchecked")
public GenSparkProcContext(HiveConf conf,
ParseContext parseContext,
List> moveTask,
List> rootTasks,
Set inputs,
Set outputs,
Map> topOps) {
this.conf = conf;
this.parseContext = parseContext;
this.moveTask = moveTask;
this.rootTasks = rootTasks;
this.inputs = inputs;
this.outputs = outputs;
this.topOps = topOps;
this.currentTask = (SparkTask) TaskFactory.get(
new SparkWork(conf.getVar(HiveConf.ConfVars.HIVEQUERYID)), conf);
this.rootTasks.add(currentTask);
this.leafOpToFollowingWorkInfo =
new LinkedHashMap>();
this.linkOpWithWorkMap = new LinkedHashMap, Map>();
this.linkWorkWithReduceSinkMap = new LinkedHashMap>();
this.smbMapJoinCtxMap = new HashMap();
this.mapJoinWorkMap = new LinkedHashMap>();
this.rootToWorkMap = new LinkedHashMap, BaseWork>();
this.childToWorkMap = new LinkedHashMap, List>();
this.mapJoinParentMap = new LinkedHashMap>>();
this.currentMapJoinOperators = new LinkedHashSet();
this.linkChildOpWithDummyOp = new LinkedHashMap, List>>();
this.dependencyTask = conf.getBoolVar(
HiveConf.ConfVars.HIVE_MULTI_INSERT_MOVE_TASKS_SHARE_DEPENDENCIES)
? (DependencyCollectionTask) TaskFactory.get(new DependencyCollectionWork(), conf)
: null;
this.unionWorkMap = new LinkedHashMap, BaseWork>();
this.currentUnionOperators = new LinkedList();
this.workWithUnionOperators = new LinkedHashSet();
this.clonedReduceSinks = new LinkedHashSet();
this.fileSinkSet = new LinkedHashSet();
this.fileSinkMap = new LinkedHashMap>();
}
}