flink读取kafka写入es

package com.zjl.flink;


import org.apache.flink.api.common.functions.RuntimeContext;
import org.apache.flink.api.common.serialization.DeserializationSchema;
import org.apache.flink.api.common.serialization.SimpleStringSchema;

import org.apache.flink.streaming.api.datastream.DataStreamSource;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.connectors.elasticsearch.ElasticsearchSinkFunction;
import org.apache.flink.streaming.connectors.elasticsearch.RequestIndexer;
import org.apache.flink.streaming.connectors.elasticsearch6.ElasticsearchSink;
import org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer;
import org.apache.http.HttpHost;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.client.Requests;



import java.util.*;

public class kafka {

    public static void main(String[] args) throws Exception{
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        env.enableCheckpointing(500);
        //kafka
        Properties properties = new Properties();
        properties.setProperty( "bootstrap.servers","192.168.70.86:9092" );
        properties.setProperty( "group.id","zjl" );
        DeserializationSchema deserializationSchema = new SimpleStringSchema();
        String topic = "zjl";
        FlinkKafkaConsumer text1 = new FlinkKafkaConsumer(topic,deserializationSchema,properties  );
        text1.setStartFromLatest();
        DataStreamSource test = env.addSource( text1 );
        //es
        List esserver = new ArrayList<>();
        esserver.add( new HttpHost( "192.168.70.9",9200,"http" ) );
        ElasticsearchSink.Builder essink = new ElasticsearchSink.Builder<>(
                esserver,
                new ElasticsearchSinkFunction() {
                    @Override
                    public void process(String s, RuntimeContext runtimeContext, RequestIndexer requestIndexer) {
                        Map json = new HashMap<>();
                        json.put( "message",s );
                        System.out.println(json);
                        IndexRequest indexRequest = Requests.indexRequest()
                                .index("flink")
                                .type("_doc")
                                .source(json);
                        requestIndexer.add( indexRequest );
                    }
                }
        );
        essink.setBulkFlushMaxActions( 1 );
        essink.setBulkFlushMaxSizeMb( 500 );
        essink.setBulkFlushInterval( 5000 );
        test.addSink( essink.build() );
        //test.print();
        env.execute("Flink-kafka demo");
    }
    }