spark straming basis

code/spark/spark-streaming-basis/src/main/java/com/heibaiying/JedisPoolUtils.scala

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+package com.heibaiying
+
+import redis.clients.jedis.{Jedis, JedisPool, JedisPoolConfig}
+
+object JedisPoolUtils {
+
+  /*创建Jedis连接池*/
+  val config = new JedisPoolConfig
+  config.setMaxTotal(30)
+  config.setMaxIdle(10)
+  val jedisPool = new JedisPool(config, "localhost", 6379)
+
+
+  def getConnection: Jedis = {
+    jedisPool.getResource
+  }
+
+}

code/spark/spark-streaming-basis/src/main/java/com/heibaiying/NetworkWordCount.scala

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+package com.heibaiying
+
+import org.apache.spark.SparkConf
+import org.apache.spark.streaming.{Seconds, StreamingContext}
+
+/**
+  *
+  */
+object NetworkWordCount {
+
+
+  def main(args: Array[String]) {
+
+    val sparkConf = new SparkConf().setAppName("NetworkWordCount").setMaster("local[2]")
+    /*指定时间间隔*/
+    val ssc = new StreamingContext(sparkConf, Seconds(1))
+
+    val lines = ssc.socketTextStream("hadoop001", 9999)
+    lines.flatMap(_.split(" ")).map(x => (x, 1)).reduceByKey(_ + _).print()
+
+    /*启动服务*/
+    ssc.start()
+
+    /*等待服务结束*/
+    ssc.awaitTermination()
+
+  }
+}

code/spark/spark-streaming-basis/src/main/java/com/heibaiying/NetworkWordCountToRedis.scala

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+package com.heibaiying
+
+import org.apache.spark.SparkConf
+import org.apache.spark.streaming.{Seconds, StreamingContext}
+
+/**
+  * 词频统计
+  */
+object NetworkWordCountV2 {
+
+
+  def main(args: Array[String]) {
+
+    /*
+     * 本地测试时最好指定hadoop用户名,否则会默认使用本地电脑的用户名,
+     * 此时在HDFS上创建目录时可能会抛出权限不足的异常
+     */
+    System.setProperty("HADOOP_USER_NAME", "root")
+
+    /*指定时间间隔为5s*/
+    val sparkConf = new SparkConf().setAppName("NetworkWordCount").setMaster("local[2]")
+    val ssc = new StreamingContext(sparkConf, Seconds(5))
+
+    /*必须要设置检查点*/
+    ssc.checkpoint("hdfs://192.168.200.229:8020/spark-streaming")
+
+    /*创建文本输入流,并进行词频统计*/
+    val lines = ssc.socketTextStream("192.168.200.229", 9999)
+    lines.flatMap(_.split(" ")).map(x => (x, 1))
+      .updateStateByKey((values: Seq[Int], state: Option[Int]) => {
+        val currentCount: Int = values.sum
+        val lastCount: Int = state.getOrElse(0)
+        Some(currentCount + lastCount)
+      })
+      .print()
+
+    /*启动服务*/
+    ssc.start()
+    /*等待服务结束*/
+    ssc.awaitTermination()
+
+  }
+}

code/spark/spark-streaming-basis/src/main/java/com/heibaiying/NetworkWordCountV2.scala

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+package com.heibaiying
+
+import org.apache.spark.SparkConf
+import org.apache.spark.streaming.{Seconds, StreamingContext}
+
+/**
+  * 词频统计
+  */
+object NetworkWordCountV2 {
+
+
+  def main(args: Array[String]) {
+
+    /*指定时间间隔为5s*/
+    val sparkConf = new SparkConf().setAppName("NetworkWordCount").setMaster("local[2]")
+    val ssc = new StreamingContext(sparkConf, Seconds(5))
+
+    /*创建文本输入流,并进行词频统计*/
+    val lines = ssc.socketTextStream("192.168.200.229", 9999)
+    lines.flatMap(_.split(" ")).map(x => (x, 1)).reduceByKey(_ + _).print()
+
+    /*启动服务*/
+    ssc.start()
+    /*等待服务结束*/
+    ssc.awaitTermination()
+
+  }
+}

code/spark/spark-streaming-basis/src/main/java/com/heibaiying/utils/JedisPoolUtil.java

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+package com.heibaiying.utils;
+
+import redis.clients.jedis.JedisPool;
+import redis.clients.jedis.JedisPoolConfig;
+
+public class JedisPoolUtil {
+
+    // 必须要声明为 volatile 防止指令重排序
+    private static volatile JedisPool JedisPool = null;
+
+    private JedisPoolUtil() {
+        if (JedisPool != null) {
+            throw new RuntimeException("单例模式禁止反射调用!");
+        }
+    }
+
+    public static JedisPool getConnect() {
+        if (JedisPool == null) {
+            synchronized (JedisPoolUtil.class) {
+                if (JedisPool != null) {
+                    JedisPoolConfig config = new JedisPoolConfig();
+                    config.setMaxTotal(30);
+                    config.setMaxIdle(10);
+                    JedisPool jedisPool = new JedisPool(config, "localhost", 6379);
+                }
+            }
+        }
+        return JedisPool;
+    }
+}

code/spark/spark-streaming-basis/src/main/java/com/heibaiying/utils/JedisPoolUtil.scala

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+package com.heibaiying.utils
+
+import redis.clients.jedis.{Jedis, JedisPool, JedisPoolConfig}
+
+object JedisPoolUtil {
+
+  /*创建Jedis连接池*/
+  val config = new JedisPoolConfig
+  config.setMaxTotal(30)
+  config.setMaxIdle(10)
+  val jedisPool = new JedisPool(config, "localhost", 6379)
+
+
+  def getConnection: Jedis = {
+    jedisPool.getResource
+  }
+
+}