【Flink】提交jar包到Flink集群并运行

场景:监听一个文本流端口进行数据的实时计算(字符出现的次数)

一、在liunx中开启一个端口

[root@sdata-sightwise03 ~]# nc -lk 7777

二、编写任务代码

public class Test {
    public static void main(String[] args) throws Exception {
        //创建执行环境
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        //获取程序入参
        ParameterTool tool = ParameterTool.fromArgs(args);
        String host = tool.get("host");
        Integer port = tool.getInt("port");
        //读取文本流
        DataStreamSource source = env.socketTextStream(host, port);
        SingleOutputStreamOperator> operator = source.flatMap(new FlatMapFunction>() {
            @Override
            public void flatMap(String s, Collector> collector) throws Exception {
                String[] splits = s.split(" ");
                for (String split : splits) {
                    collector.collect(new Tuple2<>(split, 1));
                }
            }
        }).filter(data -> StringUtils.isNotEmpty(data.f0)).keyBy(data -> data.f0).sum(1);
        //打印
        operator.print();
        //执行
        env.execute();
    }
}

三、打包并提交jar包

 在liunx窗口输入字符，查看flink日志已动态打印字符出现的次数