---

id: ‘doris’ title: ‘Apache Doris Connector’ original: true sidebar_position: 4

import Tabs from ‘@theme/Tabs’; import TabItem from ‘@theme/TabItem’;

Apache Doris Connector

Apache Doris is a high-performance, and real-time analytical database, which could support high-concurrent point query scenarios. Apache StreamPark encapsulates DoirsSink for writing data to Doris in real-time, based on its stream loads.

Write with Apache StreamPark™

DorisSink only supports JSON format (single-layer) writing currently, such as: {"id":1,"name":"streampark"} The example of the running program is Java, as follows:

Configuration list

doris.sink:
  fenodes:  127.0.0.1:8030    # doris fe http url
  database: test              # doris database
  table: test_tbl             # doris table
  user: root
  password: 123456
  batchSize: 100          # doris sink batch size per streamload
  intervalMs: 3000        # doris sink the time interval of each streamload
  maxRetries: 1           # stream load retries
  streamLoad:             # doris streamload own parameters
    format: json
    strip_outer_array: true
    max_filter_ratio: 1

Write data to Doris

package org.apache.streampark.test.flink.java.datastream;

import org.apache.streampark.flink.core.StreamEnvConfig;
import org.apache.streampark.flink.core.java.sink.doris.DorisSink;
import org.apache.streampark.flink.core.java.source.KafkaSource;
import org.apache.streampark.flink.core.scala.StreamingContext;
import org.apache.streampark.flink.core.scala.source.KafkaRecord;
import org.apache.flink.api.common.functions.MapFunction;
import org.apache.flink.streaming.api.datastream.DataStream;

public class DorisJavaApp {

    public static void main(String[] args) {
        StreamEnvConfig envConfig = new StreamEnvConfig(args, null);
        StreamingContext context = new StreamingContext(envConfig);
        DataStream<String> source = new KafkaSource<String>(context)
            .getDataStream()
            .map((MapFunction<KafkaRecord<String>, String>) KafkaRecord::value)
            .returns(String.class);

        new DorisSink<String>(context).sink(source);

        context.start();
    }
}

:::tip hint

It is recommended to set batchSize to insert data in batches to improve performance. At the same time, to improve real-time performance, intervalMs is supported for batch writing. The number of streamload retries can be increased by setting maxRetries.

:::