双十一流式计算 购买

import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.api.common.functions.MapFunction;

public class StreamingJob {
    public static void main(String[] args) throws Exception {
        // 创建流处理环境
        final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

        // 从数据源获取数据流
        DataStream<String> text = env.socketTextStream("localhost", 9999);

        // 对数据流进行处理
        DataStream<Integer> counts = text.map(new MapFunction<String, Integer>() {
            public Integer map(String value) {
                return value.length();
            }
        });

        // 输出处理结果
        counts.print();

        // 执行任务
        env.execute("Streaming WordCount");
    }
}