本文整理了Java中org.apache.spark.api.java.JavaPairRDD.keyBy()方法的一些代码示例，展示了JavaPairRDD.keyBy()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。JavaPairRDD.keyBy()方法的具体详情如下：
包路径：org.apache.spark.api.java.JavaPairRDD
类名称：JavaPairRDD
方法名：keyBy

JavaPairRDD.keyBy介绍

暂无

代码示例

代码示例来源：origin: org.apache.spark/spark-core_2.11

@SuppressWarnings("unchecked")
@Test
public void keyByOnPairRDD() {
 // Regression test for SPARK-4459
 JavaRDD<Integer> rdd = sc.parallelize(Arrays.asList(1, 1, 2, 3, 5, 8, 13));
 Function<Tuple2<Integer, Integer>, String> sumToString = x -> String.valueOf(x._1() + x._2());
 JavaPairRDD<Integer, Integer> pairRDD = rdd.zip(rdd);
 JavaPairRDD<String, Tuple2<Integer, Integer>> keyed = pairRDD.keyBy(sumToString);
 assertEquals(7, keyed.count());
 assertEquals(1, (long) keyed.lookup("2").get(0)._1());
}

代码示例来源：origin: org.apache.spark/spark-core_2.10

@SuppressWarnings("unchecked")
@Test
public void keyByOnPairRDD() {
 // Regression test for SPARK-4459
 JavaRDD<Integer> rdd = sc.parallelize(Arrays.asList(1, 1, 2, 3, 5, 8, 13));
 Function<Tuple2<Integer, Integer>, String> sumToString = x -> String.valueOf(x._1() + x._2());
 JavaPairRDD<Integer, Integer> pairRDD = rdd.zip(rdd);
 JavaPairRDD<String, Tuple2<Integer, Integer>> keyed = pairRDD.keyBy(sumToString);
 assertEquals(7, keyed.count());
 assertEquals(1, (long) keyed.lookup("2").get(0)._1());
}

代码示例来源：origin: org.apache.spark/spark-core

@SuppressWarnings("unchecked")
@Test
public void keyByOnPairRDD() {
 // Regression test for SPARK-4459
 JavaRDD<Integer> rdd = sc.parallelize(Arrays.asList(1, 1, 2, 3, 5, 8, 13));
 Function<Tuple2<Integer, Integer>, String> sumToString = x -> String.valueOf(x._1() + x._2());
 JavaPairRDD<Integer, Integer> pairRDD = rdd.zip(rdd);
 JavaPairRDD<String, Tuple2<Integer, Integer>> keyed = pairRDD.keyBy(sumToString);
 assertEquals(7, keyed.count());
 assertEquals(1, (long) keyed.lookup("2").get(0)._1());
}