Examples of eu.stratosphere.types.Record

eu.stratosphere.types.Record
Record is the basic data record that flows between functions in a Stratosphere program. The record is a tuple of arbitrary values. It implements a sparse tuple model, meaning that the record can contain many fields which are actually null and not represented in the record. It has internally a bitmap marking which fields are set and which are not.
For efficient data exchange, a record that is read from any source holds its data in serialized binary form. Fields are deserialized lazily upon first access. Modified fields are cached and the modifications are incorporated into the binary representation upon the next serialization or any explicit call to the {@link #updateBinaryRepresenation()} method.
IMPORTANT NOTE: Records must be used as mutable objects and be reused across user function calls in order to achieve performance. The record is a heavy-weight object, designed to minimize calls to the individual fields' serialization and deserialization methods. It holds quite a bit of state consumes a comparably large amount of memory (> 200 bytes in a 64 bit JVM) due to several pointers and arrays.
This class is NOT thread-safe!

    private final IntValue value = new IntValue();


    @Override
    public void reduce(Iterator<Record> records, Collector<Record> out)
        throws Exception {
      Record element = null;
      int cnt = 0;
      while (records.hasNext()) {
        element = records.next();
        cnt++;
      }
      element.getField(0, this.key);
      this.value.setValue(cnt - this.key.getValue());
      element.setField(1, this.value);
      out.collect(element);
    }

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    private final IntValue combineValue = new IntValue();


    @Override
    public void reduce(Iterator<Record> records, Collector<Record> out)
        throws Exception {
      Record element = null;
      int sum = 0;
      while (records.hasNext()) {
        element = records.next();
        element.getField(1, this.value);
        
        sum += this.value.getValue();
      }
      element.getField(0, this.key);
      this.value.setValue(sum - this.key.getValue());
      element.setField(1, this.value);
      out.collect(element);
    }

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    }
    
    @Override
    public void combine(Iterator<Record> records, Collector<Record> out)
        throws Exception {
      Record element = null;
      int sum = 0;
      while (records.hasNext()) {
        element = records.next();
        element.getField(1, this.combineValue);
        
        sum += this.combineValue.getValue();
      }
      
      this.combineValue.setValue(sum);
      element.setField(1, this.combineValue);
      out.collect(element);
    }

View Full Code Here

    private final IntValue value = new IntValue();


    @Override
    public void reduce(Iterator<Record> records, Collector<Record> out)
        throws Exception {
      Record element = null;
      int valCnt = 0;
      while (records.hasNext()) {
        element = records.next();
        valCnt++;
      }
      
      if (++this.cnt >= 10) {
        throw new ExpectedTestException();
      }
      
      element.getField(0, this.key);
      this.value.setValue(valCnt - this.key.getValue());
      element.setField(1, this.value);
      out.collect(element);
    }

View Full Code Here

    int numRecs = 50000;
    int[] hit = new int[numChans];


    for (int i = 0; i < numRecs; i++) {
      IntValue k = new IntValue(i);
      Record rec = new Record(k);
      
      int[] chans = oe1.selectChannels(rec, hit.length);
      for(int j=0; j < chans.length; j++) {
        hit[chans[j]]++;
      }
    }


    int cnt = 0;
    for (int i = 0; i < hit.length; i++) {
      assertTrue(hit[i] > 0);
      cnt += hit[i];
    }
    assertTrue(cnt == numRecs);


    // Test for StringValue
    @SuppressWarnings("unchecked")
    final RecordComparator stringComp = new RecordComparator(new int[] {0}, new Class[] {StringValue.class});
    ChannelSelector<Record> oe2 = new RecordOutputEmitter(ShipStrategyType.PARTITION_HASH, stringComp);


    numChans = 100;
    numRecs = 10000;
    
    hit = new int[numChans];


    for (int i = 0; i < numRecs; i++) {
      StringValue k = new StringValue(i + "");
      Record rec = new Record(k);
        
      int[] chans = oe2.selectChannels(rec, hit.length);
      for(int j=0; j < chans.length; j++) {
        hit[chans[j]]++;
      }

View Full Code Here

    
    int[] hit = new int[numChannels];


    for (int i = 0; i < numRecords; i++) {
      IntValue k = new IntValue(i);
      Record rec = new Record(k);
      
      int[] chans = oe1.selectChannels(rec, hit.length);
      for(int j=0; j < chans.length; j++) {
        hit[chans[j]]++;
      }
    }


    int cnt = 0;
    for (int i = 0; i < hit.length; i++) {
      assertTrue(hit[i] == (numRecords/numChannels) || hit[i] == (numRecords/numChannels)-1);
      cnt += hit[i];
    }
    assertTrue(cnt == numRecords);


    // Test for StringValue
    @SuppressWarnings("unchecked")
    final RecordComparator stringComp = new RecordComparator(new int[] {0}, new Class[] {StringValue.class});
    final ChannelSelector<Record> oe2 = new RecordOutputEmitter(ShipStrategyType.FORWARD, stringComp);


    numChannels = 100;
    numRecords = 10000;
    
    hit = new int[numChannels];


    for (int i = 0; i < numRecords; i++) {
      StringValue k = new StringValue(i + "");
      Record rec = new Record(k);
        
      int[] chans = oe2.selectChannels(rec, hit.length);
      for(int j=0; j < chans.length; j++) {
        hit[chans[j]]++;
      }

View Full Code Here

    
    int[] hit = new int[numChannels];


    for (int i = 0; i < numRecords; i++) {
      IntValue k = new IntValue(i);
      Record rec = new Record(k);
      
      int[] chans = oe1.selectChannels(rec, hit.length);
      for(int j=0; j < chans.length; j++) {
        hit[chans[j]]++;
      }
    }


    for (int i = 0; i < hit.length; i++) {
      assertTrue(hit[i]+"", hit[i] == numRecords);
    }
    
    // Test for StringValue
    @SuppressWarnings("unchecked")
    final RecordComparator stringComp = new RecordComparator(new int[] {0}, new Class[] {StringValue.class});
    final ChannelSelector<Record> oe2 = new RecordOutputEmitter(ShipStrategyType.BROADCAST, stringComp);


    numChannels = 100;
    numRecords = 5000;
    
    hit = new int[numChannels];


    for (int i = 0; i < numRecords; i++) {
      StringValue k = new StringValue(i + "");
      Record rec = new Record(k);
        
      int[] chans = oe2.selectChannels(rec, hit.length);
      for(int j=0; j < chans.length; j++) {
        hit[chans[j]]++;
      }

View Full Code Here

    int numRecords = 5000;
    
    int[] hit = new int[numChannels];


    for (int i = 0; i < numRecords; i++) {
      Record rec = new Record(4);
      rec.setField(0, new IntValue(i));
      rec.setField(1, new StringValue("AB"+i+"CD"+i));
      rec.setField(3, new DoubleValue(i*3.141d));
      
      int[] chans = oe1.selectChannels(rec, hit.length);
      for(int j=0; j < chans.length; j++) {
        hit[chans[j]]++;
      }

View Full Code Here

    // Test for IntValue
    @SuppressWarnings("unchecked")
    final RecordComparator intComp = new RecordComparator(new int[] {1}, new Class[] {IntValue.class});
    final ChannelSelector<Record> oe1 = new RecordOutputEmitter(ShipStrategyType.PARTITION_HASH, intComp);


    Record rec = new Record(0);
    rec.setField(0, new IntValue(1));
    
    try {
      oe1.selectChannels(rec, 100);
    } catch (KeyFieldOutOfBoundsException re) {
      Assert.assertEquals(1, re.getFieldNumber());

View Full Code Here

    // Test for IntValue
    @SuppressWarnings("unchecked")
    final RecordComparator intComp = new RecordComparator(new int[] {0}, new Class[] {IntValue.class});
    final ChannelSelector<Record> oe1 = new RecordOutputEmitter(ShipStrategyType.PARTITION_HASH, intComp);


    Record rec = new Record(2);
    rec.setField(1, new IntValue(1));


    try {
      oe1.selectChannels(rec, 100);
    } catch (NullKeyFieldException re) {
      Assert.assertEquals(0, re.getFieldNumber());

View Full Code Here

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