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!

    do {
      lower = upper;
      upper = lower;
      // find the upper bound
      while (iterator.hasNext()) {
        Record target = iterator.next();
        int val = target.getField(0, IntValue.class).getValue();
        Assert.assertEquals(upper++, val);
      }
      // now reset the buffer a few times
      for (int i = 0; i < 5; ++i) {
        iterator.reset();
        int count = 0;
        while (iterator.hasNext()) {
          Record target = iterator.next();
          int val = target.getField(0, IntValue.class).getValue();
          Assert.assertEquals(lower + (count++), val);
        }
        Assert.assertEquals(upper - lower, count);
      }
    } while (iterator.nextBlock());

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    do {
      lower = upper;
      upper = lower;
      // find the upper bound
      while (iterator.hasNext()) {
        Record target = iterator.next();
        int val = target.getField(0, IntValue.class).getValue();
        Assert.assertEquals(upper++, val);
      }
      // now reset the buffer a few times
      for (int i = 0; i < 5; ++i) {
        iterator.reset();
        int count = 0;
        while (iterator.hasNext()) {
          Record target = iterator.next();
          int val = target.getField(0, IntValue.class).getValue();
          Assert.assertEquals(lower + (count++), val);
        }
        Assert.assertEquals(upper - lower, count);
      }
    } while (iterator.nextBlock());

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    this.queue = new ArrayBlockingQueue<Record>(size, false);
  }


  @Override
  public Record next(Record reuse) {
    Record r = null;
    while (r == null) {
      try {
        r = queue.take();
      } catch (InterruptedException iex) {
        throw new RuntimeException("Reader was interrupted.");
      }
    }


    if (r == SENTINEL) {
      // put the sentinel back, to ensure that repeated calls do not block
      try {
        queue.put(r);
      } catch (InterruptedException e) {
        throw new RuntimeException("Reader was interrupted.");
      }
      return null;
    } else {
      r.copyTo(reuse);
      return reuse;
    }
  }

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        TestData.Value v1 = null;
        TestData.Value v2 = null;
        
        if (iter1.hasNext()) {
          Record rec = iter1.next();
          rec.getFieldInto(0, key);
          v1 = rec.getField(1, TestData.Value.class);
        }
        else if (iter2.hasNext()) {
          Record rec = iter2.next();
          rec.getFieldInto(0, key);
          v2 = rec.getField(1, TestData.Value.class);
        }
        else {
          Assert.fail("No input on both sides.");
        }
  
        // assert that matches for this key exist
        Assert.assertTrue("No matches for key " + key, expectedCoGroupsMap.containsKey(key));
        
        Collection<TestData.Value> expValues1 = expectedCoGroupsMap.get(key).get(0);
        Collection<TestData.Value> expValues2 = expectedCoGroupsMap.get(key).get(1);
        
        if (v1 != null) {
          expValues1.remove(v1);
        }
        else {
          expValues2.remove(v2);
        }
        
        while(iter1.hasNext()) {
          Record rec = iter1.next();
          Assert.assertTrue("Value not in expected set of first input", expValues1.remove(rec.getField(1, TestData.Value.class)));
        }
        Assert.assertTrue("Expected set of first input not empty", expValues1.isEmpty());
        
        while(iter2.hasNext()) {
          Record rec = iter2.next();
          Assert.assertTrue("Value not in expected set of second input", expValues2.remove(rec.getField(1, TestData.Value.class)));
        }
        Assert.assertTrue("Expected set of second input not empty", expValues2.isEmpty());
  
        expectedCoGroupsMap.remove(key);
      }

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  private Map<TestData.Key, Collection<TestData.Value>> collectData(Generator iter, int num)
  throws Exception
  {
    Map<TestData.Key, Collection<TestData.Value>> map = new HashMap<TestData.Key, Collection<TestData.Value>>();
    Record pair = new Record();
    
    for (int i = 0; i < num; i++) {
      iter.next(pair);
      TestData.Key key = pair.getField(0, TestData.Key.class);
      
      if (!map.containsKey(key)) {
        map.put(new TestData.Key(key.getKey()), new ArrayList<TestData.Value>());
      }


      Collection<TestData.Value> values = map.get(key);
      values.add(new TestData.Value(pair.getField(1, TestData.Value.class).getValue()));
    }
    return map;
  }

View Full Code Here

    MutableObjectIterator<Record> iterator = merger.getIterator();
    
    LOG.debug("Checking results...");
    int pairsEmitted = 1;


    Record rec1 = new Record();
    Record rec2 = new Record();
    
    Assert.assertTrue((rec1 = iterator.next(rec1)) != null);
    while ((rec2 = iterator.next(rec2)) != null) {
      final Key k1 = rec1.getField(0, TestData.Key.class);
      final Key k2 = rec2.getField(0, TestData.Key.class);
      pairsEmitted++;
      
      Assert.assertTrue(keyComparator.compare(k1, k2) <= 0); 
      
      Record tmp = rec1;
      rec1 = rec2;
      k1.setKey(k2.getKey());
      
      rec2 = tmp;
    }

View Full Code Here

    MutableObjectIterator<Record> iterator = merger.getIterator();
    
    LOG.debug("Checking results...");
    int pairsEmitted = 1;


    Record rec1 = new Record();
    Record rec2 = new Record();
    
    Assert.assertTrue((rec1 = iterator.next(rec1)) != null);
    while ((rec2 = iterator.next(rec2)) != null) {
      final Key k1 = rec1.getField(0, TestData.Key.class);
      final Key k2 = rec2.getField(0, TestData.Key.class);
      pairsEmitted++;
      
      Assert.assertTrue(keyComparator.compare(k1, k2) <= 0); 
      
      Record tmp = rec1;
      rec1 = rec2;
      k1.setKey(k2.getKey());
      
      rec2 = tmp;
    }

View Full Code Here

    MutableObjectIterator<Record> iterator = merger.getIterator();
    
    LOG.debug("Checking results...");
    int pairsEmitted = 1;


    Record rec1 = new Record();
    Record rec2 = new Record();
    
    Assert.assertTrue((rec1 = iterator.next(rec1)) != null);
    while ((rec2 = iterator.next(rec2)) != null) {
      final Key k1 = rec1.getField(0, TestData.Key.class);
      final Key k2 = rec2.getField(0, TestData.Key.class);
      pairsEmitted++;
      
      Assert.assertTrue(keyComparator.compare(k1, k2) <= 0); 
      
      Record tmp = rec1;
      rec1 = rec2;
      k1.setKey(k2.getKey());
      
      rec2 = tmp;
    }

View Full Code Here

    
    LOG.debug("Checking results...");
    int pairsRead = 1;
    int nextStep = PAIRS / 20;


    Record rec1 = new Record();
    Record rec2 = new Record();
    
    Assert.assertTrue((rec1 = iterator.next(rec1)) != null);
    while ((rec2 = iterator.next(rec2)) != null) {
      final Key k1 = rec1.getField(0, TestData.Key.class);
      final Key k2 = rec2.getField(0, TestData.Key.class);
      pairsRead++;
      
      Assert.assertTrue(keyComparator.compare(k1, k2) <= 0); 
      
      Record tmp = rec1;
      rec1 = rec2;
      k1.setKey(k2.getKey());
      rec2 = tmp;
      
      // log

View Full Code Here

  
  private Map<TestData.Key, Collection<TestData.Value>> collectData(MutableObjectIterator<Record> iter)
  throws Exception
  {
    Map<TestData.Key, Collection<TestData.Value>> map = new HashMap<TestData.Key, Collection<TestData.Value>>();
    Record pair = new Record();
    
    while ((pair = iter.next(pair)) != null) {
      TestData.Key key = pair.getField(0, TestData.Key.class);
      
      if (!map.containsKey(key)) {
        map.put(new TestData.Key(key.getKey()), new ArrayList<TestData.Value>());
      }


      Collection<TestData.Value> values = map.get(key);
      values.add(new TestData.Value(pair.getField(1, TestData.Value.class).getValue()));
    }


    return map;
  }

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