Flink基于集合的Source

Flink基于集合的Source

基于集合的Source，该类Source通常就是为了做测试或实验的，不用于生产环境

import org.apache.flink.streaming.api.datastream.DataStreamSource;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import java.util.Arrays;
import java.util.List;

public class CollectionSource {
    public static void main(String[] args) throws Exception{
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        List nums = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
        DataStreamSource numStream = env.fromCollection(nums);
        System.out.println("fromCollection创建的DataStreamSource的并行度为：" + numStream.getParallelism());
        numStream.print();
        env.execute();
    }
}