flink: 通过Sink把数据写入elasticsearch

<dependency>
            <groupId>org.apache.bahir</groupId>
            <artifactId>flink-connector-redis_2.12</artifactId>
            <version>1.1.0</version>
        </dependency>

        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-connector-elasticsearch7_2.12</artifactId>
            <version>1.10.1</version>
        </dependency>

package cn.edu.tju.demo;

import org.apache.flink.api.common.functions.*;
import org.apache.flink.api.common.serialization.SimpleStringSchema;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.streaming.api.collector.selector.OutputSelector;
import org.apache.flink.streaming.api.datastream.*;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.api.functions.co.CoMapFunction;
import org.apache.flink.streaming.api.functions.source.SourceFunction;
import org.apache.flink.streaming.connectors.elasticsearch.ElasticsearchSinkFunction;
import org.apache.flink.streaming.connectors.elasticsearch.RequestIndexer;
import org.apache.flink.streaming.connectors.elasticsearch7.ElasticsearchSink;
import org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer;
import org.apache.flink.streaming.connectors.redis.RedisSink;
import org.apache.flink.streaming.connectors.redis.common.config.FlinkJedisPoolConfig;
import org.apache.flink.streaming.connectors.redis.common.mapper.RedisCommand;
import org.apache.flink.streaming.connectors.redis.common.mapper.RedisCommandDescription;
import org.apache.flink.streaming.connectors.redis.common.mapper.RedisMapper;
import org.apache.flink.util.Collector;
import org.apache.http.HttpHost;
import org.apache.kafka.clients.consumer.ConsumerConfig;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.common.serialization.StringDeserializer;
import org.apache.kafka.common.serialization.StringSerializer;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.client.Requests;

import java.util.*;

public class Test15 {
    private static String ES_SERVER = "xx.xx.xx.xx";
    public static void main(String[] args) throws Exception {
        StreamExecutionEnvironment environment = StreamExecutionEnvironment
                .getExecutionEnvironment();
        
        //DataStreamSource<String> mySource = environment.addSource(new MySourceFunction());
        DataStream<String> mySource = environment.readTextFile("demo.txt");
        
        List<HttpHost> hostList = new LinkedList<>();
        hostList.add(new HttpHost(ES_SERVER,9200));

        mySource.addSink(new ElasticsearchSink.Builder<String>(hostList, new MyEsSinkFunction())
                .build());

        environment.execute("my job");

    }

    public static class MyEsSinkFunction implements ElasticsearchSinkFunction<String> {

        @Override
        public void process(String s, RuntimeContext runtimeContext, RequestIndexer requestIndexer) {


            HashMap<String, String> dataSource = new HashMap<>();
            dataSource.put("id", UUID.randomUUID().toString());
            dataSource.put("welcome", s);


            IndexRequest indexRequest = Requests.indexRequest().index("person")
                    .source(dataSource);
            requestIndexer.add(indexRequest);

        }
    }
    

}