本文整理汇总了Java中org.apache.tinkerpop.gremlin.process.computer.MapReduce.NullObject方法的典型用法代码示例。如果您正苦于以下问题：Java MapReduce.NullObject方法的具体用法？Java MapReduce.NullObject怎么用？Java MapReduce.NullObject使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类org.apache.tinkerpop.gremlin.process.computer.MapReduce的用法示例。
在下文中一共展示了MapReduce.NullObject方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: shouldEndlessBulkResultsWithNullObject
import org.apache.tinkerpop.gremlin.process.computer.MapReduce; //导入方法依赖的package包/类
@Test
public void shouldEndlessBulkResultsWithNullObject() {
long total = 0;
final List<Tuple2<MapReduce.NullObject, Long>> numbers = new ArrayList<>();
for (long i = 0; i < 5000000; i++) {
total = total + i;
numbers.add(new Tuple2<>(MapReduce.NullObject.instance(), i));
}
final CombineIterator<MapReduce.NullObject, Long, MapReduce.NullObject, Long> combineIterator = new CombineIterator<>(new MapReduceB(), numbers.iterator());
assertTrue(combineIterator.hasNext());
final Tuple2<MapReduce.NullObject, Long> tuple = combineIterator.next();
assertFalse(combineIterator.hasNext());
assertEquals(MapReduce.NullObject.instance(), tuple._1());
assertEquals(total, tuple._2().longValue());
}
示例2: combine
import org.apache.tinkerpop.gremlin.process.computer.MapReduce; //导入方法依赖的package包/类
@Override
public void combine(final MapReduce.NullObject key, final Iterator<Long> values, final ReduceEmitter<MapReduce.NullObject, Long> emitter) {
long counter = 0;
while (values.hasNext()) {
counter = counter + values.next();
}
emitter.emit(key, counter);
}
示例3: getNullObjectWritable
import org.apache.tinkerpop.gremlin.process.computer.MapReduce; //导入方法依赖的package包/类
public static ObjectWritable<MapReduce.NullObject> getNullObjectWritable() {
return NULL_OBJECT_WRITABLE;
}
示例4: generateFinalResult
import org.apache.tinkerpop.gremlin.process.computer.MapReduce; //导入方法依赖的package包/类
@Override
public Long generateFinalResult(final Iterator<KeyValue<MapReduce.NullObject, Long>> keyValues) {
return keyValues.next().getValue();
}