| /** |
| * 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.operator; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.pig.LoadFunc; |
| import org.apache.pig.backend.executionengine.ExecException; |
| import org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler; |
| import org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigMapReduce; |
| import org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigSplit; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.POStatus; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.Result; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POLoad; |
| import org.apache.pig.backend.hadoop.executionengine.tez.runtime.TezInput; |
| import org.apache.pig.backend.hadoop.executionengine.tez.runtime.TezTaskConfigurable; |
| import org.apache.pig.data.Tuple; |
| import org.apache.pig.impl.PigImplConstants; |
| import org.apache.pig.impl.plan.OperatorKey; |
| import org.apache.pig.tools.pigstats.mapreduce.MRPigStatsUtil; |
| import org.apache.tez.common.counters.CounterGroup; |
| import org.apache.tez.common.counters.TezCounter; |
| import org.apache.tez.mapreduce.input.MRInput; |
| import org.apache.tez.mapreduce.lib.MRReader; |
| import org.apache.tez.runtime.api.LogicalInput; |
| import org.apache.tez.runtime.api.ProcessorContext; |
| import org.apache.tez.runtime.library.api.KeyValueReader; |
| |
| /** |
| * POSimpleTezLoad is used on the backend to read tuples from a Tez MRInput |
| */ |
| public class POSimpleTezLoad extends POLoad implements TezInput, TezTaskConfigurable { |
| |
| private static final long serialVersionUID = 1L; |
| |
| private String inputKey; |
| |
| private transient ProcessorContext processorContext; |
| private transient MRInput input; |
| private transient KeyValueReader reader; |
| private transient Configuration conf; |
| private transient boolean finished = false; |
| private transient TezCounter inputRecordCounter; |
| private transient boolean initialized; |
| private transient boolean noTupleCopy; |
| |
| public POSimpleTezLoad(OperatorKey k, LoadFunc loader) { |
| super(k, loader); |
| } |
| |
| @Override |
| public String[] getTezInputs() { |
| return new String[] { inputKey }; |
| } |
| |
| @Override |
| public void replaceInput(String oldInputKey, String newInputKey) { |
| if (oldInputKey.equals(inputKey)) { |
| inputKey = newInputKey; |
| } |
| } |
| |
| @Override |
| public void initialize(ProcessorContext processorContext) |
| throws ExecException { |
| this.processorContext = processorContext; |
| } |
| |
| @Override |
| public void addInputsToSkip(Set<String> inputsToSkip) { |
| } |
| |
| @Override |
| public void attachInputs(Map<String, LogicalInput> inputs, |
| Configuration conf) |
| throws ExecException { |
| this.conf = conf; |
| LogicalInput logInput = inputs.get(inputKey); |
| if (logInput == null || !(logInput instanceof MRInput)) { |
| throw new ExecException("POSimpleTezLoad only accepts MRInputs"); |
| } |
| input = (MRInput) logInput; |
| try { |
| reader = input.getReader(); |
| // Set split index, MergeCoGroup need it. And this input is the only input of the |
| // MergeCoGroup vertex. |
| if (reader instanceof MRReader) { |
| int splitIndex = ((PigSplit)((MRReader)reader).getSplit()).getSplitIndex(); |
| PigMapReduce.sJobContext.getConfiguration().setInt(PigImplConstants.PIG_SPLIT_INDEX, splitIndex); |
| } |
| } catch (IOException e) { |
| throw new ExecException(e); |
| } |
| |
| // Multiple inputs - other broadcast input like replicate join table, order by sample. |
| // We use multi input counters to just get MRInput records count. |
| if (inputs.size() > 1) { |
| CounterGroup multiInputGroup = processorContext.getCounters() |
| .getGroup(MRPigStatsUtil.MULTI_INPUTS_COUNTER_GROUP); |
| if (multiInputGroup == null) { |
| processorContext.getCounters().addGroup( |
| MRPigStatsUtil.MULTI_INPUTS_COUNTER_GROUP, |
| MRPigStatsUtil.MULTI_INPUTS_COUNTER_GROUP); |
| } |
| String name = MRPigStatsUtil.getMultiInputsCounterName(super.getLFile().getFileName(), 0); |
| if (name != null) { |
| inputRecordCounter = multiInputGroup.addCounter(name, name, 0); |
| } |
| } |
| } |
| |
| /** |
| * Previously, we reused the same Result object for all results, but we found |
| * certain operators (e.g. POStream) save references to the Result object and |
| * expect it to be constant. |
| */ |
| @Override |
| public Result getNextTuple() throws ExecException { |
| try { |
| if (finished) { |
| return RESULT_EOP; |
| } |
| if (!reader.next()) { |
| // For certain operators (such as STREAM), we could still have some work |
| // to do even after seeing the last input. These operators set a flag that |
| // says all input has been sent and to run the pipeline one more time. |
| if (Boolean.valueOf(conf.get(JobControlCompiler.END_OF_INP_IN_MAP, "false"))) { |
| this.parentPlan.endOfAllInput = true; |
| } |
| finished = true; |
| return RESULT_EOP; |
| } else { |
| Result res = new Result(); |
| Tuple next = (Tuple) reader.getCurrentValue(); |
| if (!initialized) { |
| noTupleCopy = mTupleFactory.newTuple(1).getClass().isInstance(next); |
| initialized = true; |
| } |
| // Some Loaders return implementations of DefaultTuple instead of BinSedesTuple |
| // In that case copy to BinSedesTuple |
| res.result = noTupleCopy ? next : mTupleFactory.newTupleNoCopy(next.getAll()); |
| res.returnStatus = POStatus.STATUS_OK; |
| if (inputRecordCounter != null) { |
| inputRecordCounter.increment(1); |
| } |
| return res; |
| } |
| } catch (IOException e) { |
| throw new ExecException(e); |
| } |
| } |
| |
| public void setInputKey(String inputKey) { |
| this.inputKey = inputKey; |
| } |
| } |