Java Code Examples for org.apache.hadoop.io.IntWritable#compareTo()

The following examples show how to use org.apache.hadoop.io.IntWritable#compareTo() . These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source Project: hadoop   File: TestComparators.java    License: Apache License 2.0 5 votes vote down vote up
public void reduce(IntWritable key,
                   Iterator<IntWritable> values,
                   OutputCollector<IntWritable, Text> out,
                   Reporter reporter) throws IOException {
  // check key order
  int currentKey = key.get();
  if (currentKey < lastKey) {
    fail("Keys not in sorted ascending order");
  }
  lastKey = currentKey;
  // check order of values
  IntWritable previous = new IntWritable(Integer.MIN_VALUE);
  int valueCount = 0;
  while (values.hasNext()) {
    IntWritable current = values.next();
    
    // Check that the values are sorted
    if (current.compareTo(previous) < 0)
      fail("Values generated by Mapper not in order");
    previous = current;
    ++valueCount;
  }
  if (valueCount != 5) {
    fail("Values not grouped by primary key");
  }
  out.collect(key, new Text("success"));
}
 
Example 2
Source Project: hadoop   File: TestComparators.java    License: Apache License 2.0 5 votes vote down vote up
public void reduce(IntWritable key,
                   Iterator<IntWritable> values,
                   OutputCollector<IntWritable, Text> out,
                   Reporter reporter) throws IOException {
  // check key order
  int currentKey = key.get();
  if (currentKey > lastKey) {
    fail("Keys not in sorted descending order");
  }
  lastKey = currentKey;
  // check order of values
  IntWritable previous = new IntWritable(Integer.MAX_VALUE);
  int valueCount = 0;
  while (values.hasNext()) {
    IntWritable current = values.next();
    
    // Check that the values are sorted
    if (current.compareTo(previous) > 0)
      fail("Values generated by Mapper not in order");
    previous = current;
    ++valueCount;
  }
  if (valueCount != 5) {
    fail("Values not grouped by primary key");
  }
  out.collect(key, new Text("success"));
}
 
Example 3
Source Project: big-c   File: TestComparators.java    License: Apache License 2.0 5 votes vote down vote up
public void reduce(IntWritable key,
                   Iterator<IntWritable> values,
                   OutputCollector<IntWritable, Text> out,
                   Reporter reporter) throws IOException {
  // check key order
  int currentKey = key.get();
  if (currentKey < lastKey) {
    fail("Keys not in sorted ascending order");
  }
  lastKey = currentKey;
  // check order of values
  IntWritable previous = new IntWritable(Integer.MIN_VALUE);
  int valueCount = 0;
  while (values.hasNext()) {
    IntWritable current = values.next();
    
    // Check that the values are sorted
    if (current.compareTo(previous) < 0)
      fail("Values generated by Mapper not in order");
    previous = current;
    ++valueCount;
  }
  if (valueCount != 5) {
    fail("Values not grouped by primary key");
  }
  out.collect(key, new Text("success"));
}
 
Example 4
Source Project: big-c   File: TestComparators.java    License: Apache License 2.0 5 votes vote down vote up
public void reduce(IntWritable key,
                   Iterator<IntWritable> values,
                   OutputCollector<IntWritable, Text> out,
                   Reporter reporter) throws IOException {
  // check key order
  int currentKey = key.get();
  if (currentKey > lastKey) {
    fail("Keys not in sorted descending order");
  }
  lastKey = currentKey;
  // check order of values
  IntWritable previous = new IntWritable(Integer.MAX_VALUE);
  int valueCount = 0;
  while (values.hasNext()) {
    IntWritable current = values.next();
    
    // Check that the values are sorted
    if (current.compareTo(previous) > 0)
      fail("Values generated by Mapper not in order");
    previous = current;
    ++valueCount;
  }
  if (valueCount != 5) {
    fail("Values not grouped by primary key");
  }
  out.collect(key, new Text("success"));
}