| /** |
| * 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.HashMap; |
| 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.hadoop.io.IntWritable; |
| import org.apache.hadoop.io.LongWritable; |
| import org.apache.pig.backend.executionengine.ExecException; |
| 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.backend.hadoop.executionengine.tez.runtime.TezOutput; |
| 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.LogicalOutput; |
| import org.apache.tez.runtime.library.api.KeyValueWriter; |
| import org.apache.tez.runtime.library.api.KeyValuesReader; |
| |
| /** |
| * POCounterStatsTez is used to group counters from previous vertex POCounterTez tasks |
| */ |
| public class POCounterStatsTez extends PhysicalOperator implements TezInput, TezOutput { |
| |
| private static final long serialVersionUID = 1L; |
| private static final Log LOG = LogFactory.getLog(POCounterStatsTez.class); |
| private String inputKey; |
| private String outputKey; |
| // TODO: Even though we expect only one record from POCounter, because of Shuffle we have |
| // KeyValuesReader. After TEZ-661, switch to unsorted shuffle |
| private transient KeyValuesReader reader; |
| private transient KeyValueWriter writer; |
| private transient boolean finished = false; |
| private transient boolean hasNext = false; |
| |
| public POCounterStatsTez(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 { |
| LogicalInput input = inputs.get(inputKey); |
| if (input == null) { |
| throw new ExecException("Input from vertex " + inputKey + " is missing"); |
| } |
| try { |
| reader = (KeyValuesReader) input.getReader(); |
| LOG.info("Attached input from vertex " + inputKey + " : input=" + input + ", reader=" + reader); |
| hasNext = reader.next(); |
| } catch (Exception e) { |
| throw new ExecException(e); |
| } |
| } |
| |
| @Override |
| public String[] getTezOutputs() { |
| return new String[] { outputKey }; |
| } |
| |
| @Override |
| public void replaceOutput(String oldOutputKey, String newOutputKey) { |
| if (oldOutputKey.equals(outputKey)) { |
| outputKey = newOutputKey; |
| } |
| } |
| |
| @Override |
| public void attachOutputs(Map<String, LogicalOutput> outputs, |
| Configuration conf) throws ExecException { |
| LogicalOutput output = outputs.get(outputKey); |
| if (output == null) { |
| throw new ExecException("Output to vertex " + outputKey + " is missing"); |
| } |
| try { |
| writer = (KeyValueWriter) output.getWriter(); |
| LOG.info("Attached output to vertex " + outputKey + " : output=" + output + ", writer=" + writer); |
| } catch (Exception e) { |
| throw new ExecException(e); |
| } |
| } |
| |
| @Override |
| public Result getNextTuple() throws ExecException { |
| try { |
| if (finished) { |
| return RESULT_EOP; |
| } |
| Map<Integer, Long> counterRecords = new HashMap<Integer, Long>(); |
| Integer key = null; |
| Long value = null; |
| // Read count of records per task |
| while (hasNext) { |
| key = ((IntWritable)reader.getCurrentKey()).get(); |
| for (Object val : reader.getCurrentValues()) { |
| value = ((LongWritable)val).get(); |
| counterRecords.put(key, value); |
| } |
| hasNext = reader.next(); |
| } |
| |
| // BinInterSedes only takes String for map key |
| Map<String, Long> counterOffsets = new HashMap<String, Long>(); |
| // Create a map to contain task ids and beginning offset of record count |
| // based on total record count of all tasks |
| // For eg: If Task 0 has 5 records, Task 1 has 10 records and Task 2 has 3 records |
| // map will contain {0=0, 1=5, 2=15} |
| Long prevTasksCount = counterRecords.get(0); |
| counterOffsets.put("0", 0L); |
| for (int i = 1; i < counterRecords.size(); i++) { |
| counterOffsets.put("" + i, prevTasksCount); |
| prevTasksCount += counterRecords.get(i); |
| } |
| |
| Tuple tuple = mTupleFactory.newTuple(1); |
| tuple.set(0, counterOffsets); |
| writer.write(POValueOutputTez.EMPTY_KEY, tuple); |
| finished = true; |
| return RESULT_EOP; |
| } catch (IOException e) { |
| throw new ExecException(e); |
| } |
| } |
| |
| public void setInputKey(String inputKey) { |
| this.inputKey = inputKey; |
| } |
| |
| public void setOutputKey(String outputKey) { |
| this.outputKey = outputKey; |
| } |
| |
| @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 "PORankStatsTez - " + mKey.toString() + "\t<-\t " + inputKey + "\t->\t " + outputKey; |
| } |
| } |