Spark Streaming---WindowBasedTopWord(java)

package com.spark.streaming;import org.apache.spark.SparkConf;import org.apache.spark.api.java.function.Function;import org.apache.spark.api.java.function.Function2;import org.apache.spark.api.java.function.PairFunction;import org.apache.spark.streaming.Durations;import org.apache.spark.streaming.api.java.JavaDStream;import org.apache.spark.streaming.api.java.JavaPairDStream;import org.apache.spark.streaming.api.java.JavaReceiverInputDStream;import org.apache.spark.streaming.api.java.JavaStreamingContext;import scala.Tuple2;public class WindowBasedTopWord {    public static void main(String[] args) {        SparkConf conf = new SparkConf().setAppName("WindowBasedTopWOrd").setMaster("local[2]")                .set("spark.default.parallelism", "100");        JavaStreamingContext jssc = new JavaStreamingContext(conf, Durations.seconds(5));        // 这里叫log日志, yasaka hello , xuruyun world        JavaReceiverInputDStream<String> log = jssc.socketTextStream("node15", 8888);        JavaDStream<String> searchWord = log.map(new Function<String, String>() {            private static final long serialVersionUID = 1L;            @Override            public String call(String searchLog) throws Exception {                return searchLog.split(" ")[1];            }        });        JavaPairDStream<String, Integer> pairs = searchWord.mapToPair(new PairFunction<String, String, Integer>() {            private static final long serialVersionUID = 1L;            @Override            public Tuple2<String, Integer> call(String word) throws Exception {                return new Tuple2<String, Integer>(word ,1);            }        });        JavaPairDStream<String, Integer> wordcounts = pairs.reduceByKeyAndWindow(                new Function2<Integer, Integer, Integer>() {            private static final long serialVersionUID = 1L;            @Override            public Integer call(Integer v1, Integer v2) throws Exception {                return v1 + v2;            }        },Durations.seconds(60), Durations.seconds(10));        wordcounts.print();        jssc.start();        jssc.awaitTermination();        jssc.close();    }}