| /** |
| * 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.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.pig.backend.executionengine.ExecException; |
| import org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.JobControlCompiler; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.POStatus; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.Result; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.plans.PhyPlanVisitor; |
| import org.apache.pig.backend.hadoop.executionengine.tez.runtime.TezInput; |
| import org.apache.pig.data.Tuple; |
| import org.apache.pig.impl.plan.OperatorKey; |
| import org.apache.pig.impl.plan.VisitorException; |
| import org.apache.tez.runtime.api.LogicalInput; |
| import org.apache.tez.runtime.api.Reader; |
| import org.apache.tez.runtime.library.api.KeyValueReader; |
| import org.apache.tez.runtime.library.api.KeyValuesReader; |
| |
| /** |
| * POValueInputTez is used read tuples from a Tez Intermediate output from a 1-1 |
| * edge |
| */ |
| public class POValueInputTez extends PhysicalOperator implements TezInput { |
| |
| private static final long serialVersionUID = 1L; |
| private static final Log LOG = LogFactory.getLog(POValueInputTez.class); |
| private String inputKey; |
| private transient boolean finished = false; |
| private transient Configuration conf; |
| // TODO Change this to value only reader after implementing |
| // value only input output |
| private transient KeyValueReader reader; |
| private transient KeyValuesReader shuffleReader; |
| private transient boolean shuffleInput; |
| private transient boolean hasNext; |
| private transient Boolean hasFirstRecord; |
| |
| public POValueInputTez(OperatorKey k) { |
| super(k); |
| } |
| |
| @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 addInputsToSkip(Set<String> inputsToSkip) { |
| } |
| |
| @Override |
| public void attachInputs(Map<String, LogicalInput> inputs, |
| Configuration conf) |
| throws ExecException { |
| this.conf = conf; |
| LogicalInput input = inputs.get(inputKey); |
| if (input == null) { |
| throw new ExecException("Input from vertex " + inputKey + " is missing"); |
| } |
| |
| try { |
| Reader r = input.getReader(); |
| if (r instanceof KeyValueReader) { |
| reader = (KeyValueReader) r; |
| // Force input fetch |
| hasFirstRecord = reader.next(); |
| } else { |
| shuffleInput = true; |
| shuffleReader = (KeyValuesReader) r; |
| hasNext = shuffleReader.next(); |
| } |
| LOG.info("Attached input from vertex " + inputKey + " : input=" + input + ", reader=" + r); |
| } catch (Exception e) { |
| throw new ExecException(e); |
| } |
| } |
| |
| @Override |
| public Result getNextTuple() throws ExecException { |
| try { |
| if (finished) { |
| return RESULT_EOP; |
| } |
| if (shuffleInput) { |
| while (hasNext) { |
| if (shuffleReader.getCurrentValues().iterator().hasNext()) { |
| Tuple origTuple = (Tuple)shuffleReader.getCurrentValues().iterator().next(); |
| Tuple copy = mTupleFactory.newTuple(origTuple.getAll()); |
| return new Result(POStatus.STATUS_OK, copy); |
| } |
| hasNext = shuffleReader.next(); |
| } |
| } else { |
| if (hasFirstRecord != null) { |
| if (hasFirstRecord) { |
| hasFirstRecord = null; |
| Tuple origTuple = (Tuple) reader.getCurrentValue(); |
| Tuple copy = mTupleFactory.newTuple(origTuple.getAll()); |
| return new Result(POStatus.STATUS_OK, copy); |
| } |
| hasFirstRecord = null; |
| } else { |
| while (reader.next()) { |
| Tuple origTuple = (Tuple) reader.getCurrentValue(); |
| Tuple copy = mTupleFactory.newTuple(origTuple.getAll()); |
| return new Result(POStatus.STATUS_OK, copy); |
| } |
| } |
| } |
| finished = true; |
| // 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; |
| } |
| return RESULT_EOP; |
| } catch (IOException e) { |
| throw new ExecException(e); |
| } |
| } |
| |
| public void setInputKey(String inputKey) { |
| this.inputKey = inputKey; |
| } |
| |
| @Override |
| public Tuple illustratorMarkup(Object in, Object out, int eqClassIndex) { |
| // TODO Auto-generated method stub |
| return null; |
| } |
| |
| @Override |
| public void visit(PhyPlanVisitor v) throws VisitorException { |
| v.visit(this); |
| } |
| |
| @Override |
| public boolean supportsMultipleInputs() { |
| return false; |
| } |
| |
| @Override |
| public boolean supportsMultipleOutputs() { |
| return false; |
| } |
| |
| @Override |
| public String name() { |
| return "POValueInputTez - " + mKey.toString() + "\t<-\t " + inputKey; |
| } |
| } |