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Flink sink doris案例

code • 2022-5-13 • java • 阅读 13

Flink sink doris案例,第1张

添加 flink-doris-connector 和必要的 Flink Maven 依赖

此处参考官网的配置
Flink 1.13.* 及以前的版本

<dependency>
    <groupId>org.apache.flinkgroupId>
    <artifactId>flink-javaartifactId>
    <version>${flink.version}version>
    <scope>providedscope>
dependency>
<dependency>
    <groupId>org.apache.flinkgroupId>
    <artifactId>flink-streaming-java_${scala.version}artifactId>
    <version>${flink.version}version>
    <scope>providedscope>
dependency>
<dependency>
    <groupId>org.apache.flinkgroupId>
    <artifactId>flink-clients_${scala.version}artifactId>
    <version>${flink.version}version>
    <scope>providedscope>
dependency>

<dependency>
    <groupId>org.apache.flinkgroupId>
    <artifactId>flink-table-commonartifactId>
    <version>${flink.version}version>
    <scope>providedscope>
dependency>
<dependency>
    <groupId>org.apache.flinkgroupId>
    <artifactId>flink-table-api-java-bridge_${scala.version}artifactId>
    <version>${flink.version}version>
    <scope>providedscope>
dependency>
<dependency>
    <groupId>org.apache.flinkgroupId>
    <artifactId>flink-table-planner-blink_${scala.version}artifactId>
    <version>${flink.version}version>
    <scope>providedscope>
dependency>

<dependency>
  <groupId>org.apache.dorisgroupId>
  <artifactId>flink-doris-connector-1.13_2.12artifactId>
  
  
  <version>1.0.3version>
dependency>

Flink 1.14.* 版本

<dependency>
    <groupId>org.apache.flinkgroupId>
    <artifactId>flink-javaartifactId>
    <version>${flink.version}version>
    <scope>providedscope>
dependency>
<dependency>
    <groupId>org.apache.flinkgroupId>
    <artifactId>flink-streaming-java_${scala.version}artifactId>
    <version>${flink.version}version>
    <scope>providedscope>
dependency>
<dependency>
    <groupId>org.apache.flinkgroupId>
    <artifactId>flink-clients_${scala.version}artifactId>
    <version>${flink.version}version>
    <scope>providedscope>
dependency>

<dependency>
    <groupId>org.apache.flinkgroupId>
    <artifactId>flink-table-planner_${scala.version}artifactId>
    <version>${flink.version}version>
    <scope>providedscope>
dependency>

<dependency>
  <groupId>org.apache.dorisgroupId>
  <artifactId>flink-doris-connector-1.14_2.12artifactId>
  <version>1.0.3version>
dependency>

案例是采用1.14版本的，就在今天Flink出了1.15 ，真快 我是紧赶慢赶啊

建表 
CREATE TABLE dbname.`worker` (
   `startTime` datetime NOT NULL ,
 `id` int NOT NULL,
 `name` varchar(255) DEFAULT NULL,
  `age` int DEFAULT NULL,
  `city` varchar(255) NOT NULL,
  `salary` int NOT NULL
)ENGINE=olap
DUPLICATE KEY(startTime,id,name)
PARTITION BY RANGE(startTime)()
distributed BY HASH(name)
PROPERTIES (
.......
);

记得要把分区完善，如果是空分区，会报错，无法导入数据的

模拟数据源

因为用Flink基本都是流式数据，又不想再写个kafka，所以就自己早了个数据源

class MyDataSource extends SourceFunction[String] {

  var runnning: Boolean = true

  override def run(sourceContext: SourceFunction.SourceContext[String]): Unit = {
    val random: Random = new Random()

    var id: Int = 0

    val nameList: util.ArrayList[String] = new util.ArrayList[String]()
    nameList.addAll(util.Arrays.asList("aa", "bb", "cc", "dd"))

    val cityList: util.ArrayList[String] = new util.ArrayList[String]()
    cityList.addAll(util.Arrays.asList("苏州", "无锡", "常州", "南京"))

    var age: Int = 0
    var salary: Int = 0
    var r:Int = 0
    var name:String = null
    var city :String = null

    while (runnning) {
      id = id + 1
      r = random.nextInt(10)%nameList.size()
      age = age+random.nextInt(20)
      salary = salary+random.nextInt(5000)+10000
      name = nameList.get(r)
      city = cityList.get(r)
//      val str: String = JSON.toJSONString(new worker(id, name, age, city, salary),JSON.DEFAULT_GENERATE_FEATURE)
      val str:String = "{\"startTime\":\"2022-05-06\","+"\"id\":"+id+",\"name\":\""+name+"\",\"age\":"+age+",\"city\":\""+city+"\",\"salary\":"+salary+"}"
      sourceContext.collect(str)
      Thread.sleep(1000L)
    }

  }

  override def cancel(): Unit = ???
}
sink到Doris 
 public static void main(String[] args) {
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

        Properties pro = new Properties();
        pro.setProperty("format", "json");
        pro.setProperty("strip_outer_array", "true");

        DataStreamSource<String> stream = env.addSource(new MyDataSource());
        stream.print();
        stream.addSink(
                        DorisSink.sink(
                                DorisReadOptions.builder().build(),
                                DorisExecutionOptions.builder()
                                        .setBatchSize(3)
                                        .setBatchIntervalMs(1L)
                                        .setMaxRetries(3)
                                        .setStreamLoadProp(pro).build(),
                                DorisOptions.builder()
                                        .setFenodes("xxx.xxx.xxx.xxx.xxx:8030")
                                        .setTableIdentifier("dbname.worker")
                                        .setUsername("username")
                                        .setPassword("password").build()
                        ));

        try {
            env.execute("Flink2Doris");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
封装一下

考虑到使用场景，我就封装了一下，用起来能方便一些

public class MySinkF {
    public SinkFunction<String> MySinkDoris(String tablename){
        Properties pro = new Properties();
        pro.setProperty("format", "json");
        pro.setProperty("strip_outer_array", "true");

        SinkFunction<String> sink = DorisSink.sink(
                DorisReadOptions.builder().build(),
                DorisExecutionOptions.builder()
                        .setBatchSize(3)
                        .setBatchIntervalMs(1L)
                        .setMaxRetries(3)
                        .setStreamLoadProp(pro).build(),
                DorisOptions.builder()
                        .setFenodes("xxx.xxx.xxx.xxx.xxx:8030")
                        .setTableIdentifier("dbname.worker")
                        .setUsername("username")
                        .setPassword("password").build()
        );
        return sink;
    }

}

原代码就可以简单一些了

stream.addSink(new MySinkF().MySinkDoris("worker"));
小升级一下

因为我的业务是用AGGREGATE类型，有些字段需要replace，所以我又试了一下，是否正常使用

重新建表 
CREATE TABLE test_db.`worker_replace` (
   `startTime` datetime NOT NULL ,
 `id` int NOT NULL,
 `name` varchar(255) DEFAULT NULL,
  `age` int DEFAULT NULL,
  `city` varchar(255) NOT NULL,
  `salary` int REPLACE NOT NULL
)ENGINE=olap
AGGREGATE KEY(startTime,id,name,age,city)
PARTITION BY RANGE(startTime)()
distributed BY HASH(name)
PROPERTIES (
......
);
数据源

直接从文件中拿了

{"startTime" : "2022-05-06 00:00:00","id" : 1,"name" : "dd","age" :14,"city" : "南京","salary" : 888}
{"startTime" : "2022-05-06 00:00:00","id" : 2,"name" : "dd","age" :14,"city" : "南京","salary" : 888}
{"startTime" : "2022-05-06 00:00:00","id" : 3,"name" : "dd","age" :14,"city" : "南京","salary" : 888}
{"startTime" : "2022-05-06 00:00:00","id" : 4,"name" : "dd","age" :14,"city" : "南京","salary" : 888}
{"startTime" : "2022-05-06 00:00:00","id" : 5,"name" : "dd","age" :14,"city" : "南京","salary" : 888}
{"startTime" : "2022-05-06 00:00:00","id" : 6,"name" : "dd","age" :14,"city" : "南京","salary" : 888}
{"startTime" : "2022-05-06 00:00:00","id" : 7,"name" : "dd","age" :14,"city" : "南京","salary" : 888}
{"startTime" : "2022-05-06 00:00:00","id" : 8,"name" : "dd","age" :14,"city" : "南京","salary" : 888}
{"startTime" : "2022-05-06 00:00:00","id" : 9,"name" : "dd","age" :14,"city" : "南京","salary" : 888}
{"startTime" : "2022-05-06 00:00:00","id" : 10,"name" : "dd","age" :14,"city" : "南京","salary" : 888}
{"startTime" : "2022-05-06 00:00:00","id" : 1,"name" : "dd","age" :14,"city" : "南京","salary" : 999}
{"startTime" : "2022-05-06 00:00:00","id" : 2,"name" : "dd","age" :14,"city" : "南京","salary" : 999}
{"startTime" : "2022-05-06 00:00:00","id" : 3,"name" : "dd","age" :14,"city" : "南京","salary" : 999}
{"startTime" : "2022-05-06 00:00:00","id" : 4,"name" : "dd","age" :14,"city" : "南京","salary" : 999}
最后代码 
    public static void main(String[] args) {
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

//设置并行为1 效果比较明显 
        DataStreamSource<String> data = env.readTextFile("your_path").setParallelism(1);
        data.print();
        data.addSink(new MySinkF().MySinkDoris("worker_replace"));


        try {
            env.execute("doris repalce");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

最后去观察表，确实和预期结果一样

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原文地址: https://outofmemory.cn/langs/871009.html

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