| /** |
| * 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.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.List; |
| 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.Writable; |
| import org.apache.pig.backend.executionengine.ExecException; |
| 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.TezOutput; |
| import org.apache.pig.backend.hadoop.executionengine.tez.runtime.TezTaskConfigurable; |
| 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.LogicalOutput; |
| import org.apache.tez.runtime.api.ProcessorContext; |
| import org.apache.tez.runtime.library.api.KeyValueWriter; |
| |
| public class POValueOutputTez extends PhysicalOperator implements TezOutput, TezTaskConfigurable { |
| |
| private static final long serialVersionUID = 1L; |
| private static final Log LOG = LogFactory.getLog(POValueOutputTez.class); |
| |
| private boolean scalarOutput; |
| private transient Object scalarValue; |
| private boolean taskIndexWithRecordIndexAsKey; |
| // TODO Change this to outputKey and write only once |
| // when a shared edge support is available in Tez |
| private Set<String> outputKeys = new HashSet<String>(); |
| // TODO Change this to value only writer after implementing |
| // value only input output |
| private transient List<KeyValueWriter> writers; |
| private transient Object key; |
| private transient int taskIndex; |
| private transient long count; |
| |
| |
| public static EmptyWritable EMPTY_KEY = new EmptyWritable(); |
| |
| public POValueOutputTez(OperatorKey k) { |
| super(k); |
| } |
| |
| public boolean isScalarOutput() { |
| return scalarOutput; |
| } |
| |
| public void setScalarOutput(boolean scalarOutput) { |
| this.scalarOutput = scalarOutput; |
| } |
| |
| public boolean isTaskIndexWithRecordIndexAsKey() { |
| return taskIndexWithRecordIndexAsKey; |
| } |
| |
| /* |
| * Sets tuple with task index and record index as the key. For eg: (0,1), (0,2), etc |
| * Default is empty key |
| */ |
| public void setTaskIndexWithRecordIndexAsKey(boolean taskIndexWithRecordIndexAsKey) { |
| this.taskIndexWithRecordIndexAsKey = taskIndexWithRecordIndexAsKey; |
| } |
| |
| @Override |
| public void initialize(ProcessorContext processorContext) |
| throws ExecException { |
| taskIndex = processorContext.getTaskIndex(); |
| } |
| |
| @Override |
| public String[] getTezOutputs() { |
| return outputKeys.toArray(new String[outputKeys.size()]); |
| } |
| |
| @Override |
| public void replaceOutput(String oldOutputKey, String newOutputKey) { |
| while (outputKeys.remove(oldOutputKey)) { |
| outputKeys.add(newOutputKey); |
| } |
| } |
| |
| @Override |
| public void attachOutputs(Map<String, LogicalOutput> outputs, |
| Configuration conf) throws ExecException { |
| writers = new ArrayList<KeyValueWriter>(); |
| for (String outputKey : outputKeys) { |
| LogicalOutput output = outputs.get(outputKey); |
| if (output == null) { |
| throw new ExecException("Output to vertex " + outputKey |
| + " is missing"); |
| } |
| try { |
| KeyValueWriter writer = (KeyValueWriter) output.getWriter(); |
| writers.add(writer); |
| LOG.info("Attached output to vertex " + outputKey + " : output=" + output + ", writer=" + writer); |
| } catch (Exception e) { |
| throw new ExecException(e); |
| } |
| } |
| count = 0; |
| if (!taskIndexWithRecordIndexAsKey) { |
| key = EMPTY_KEY; |
| } |
| } |
| |
| public void addOutputKey(String outputKey) { |
| outputKeys.add(outputKey); |
| } |
| |
| public void removeOutputKey(String outputKey) { |
| outputKeys.remove(outputKey); |
| } |
| |
| public boolean containsOutputKey(String outputKey) { |
| return outputKeys.contains(outputKey); |
| } |
| |
| @Override |
| public Result getNextTuple() throws ExecException { |
| Result inp; |
| while (true) { |
| inp = processInput(); |
| if (inp.returnStatus == POStatus.STATUS_EOP |
| || inp.returnStatus == POStatus.STATUS_ERR) { |
| break; |
| } |
| if (inp.returnStatus == POStatus.STATUS_NULL) { |
| continue; |
| } |
| if (scalarOutput) { |
| if (scalarValue == null) { |
| scalarValue = inp.result; |
| } else { |
| String msg = "Scalar has more than one row in the output. " |
| + "1st : " + scalarValue + ", 2nd :" |
| + inp.result |
| + " (common cause: \"JOIN\" then \"FOREACH ... GENERATE foo.bar\" should be \"foo::bar\" )"; |
| throw new ExecException(msg); |
| } |
| } |
| if (taskIndexWithRecordIndexAsKey) { |
| Tuple tuple = mTupleFactory.newTuple(2); |
| tuple.set(0, taskIndex); |
| tuple.set(1, count++); |
| key = tuple; |
| } |
| for (KeyValueWriter writer : writers) { |
| try { |
| writer.write(key, inp.result); |
| } catch (IOException e) { |
| throw new ExecException(e); |
| } |
| } |
| return RESULT_EMPTY; |
| } |
| return inp; |
| } |
| |
| @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() { |
| List<String> outputKeyList = new ArrayList<String>(outputKeys); |
| Collections.sort(outputKeyList); |
| return "POValueOutputTez - " + mKey.toString() + "\t->\t " + outputKeyList; |
| } |
| |
| public static class EmptyWritable implements Writable { |
| |
| @Override |
| public void write(DataOutput out) throws IOException { |
| } |
| |
| @Override |
| public void readFields(DataInput in) throws IOException { |
| } |
| } |
| |
| } |