Reactor系列(七)flatMap映射

#java##reactor##flatMap#

視頻講解: https://www.bilibili.com/video/av79582009/

FluxMonoTestCase.java

package com.example.reactor;

import lombok.extern.slf4j.Slf4j;
import org.junit.jupiter.api.Test;
import reactor.core.publisher.Flux;

@Slf4j
public class FluxMonoTestCase extends BaseTestCase {
    @Test
    public void flatMap(){
        Flux<String> stringFlux1 = Flux.just("a","b","c","d","e","f","g","h","i");
        //嵌套Flux
        Flux<Flux<String>> stringFlux2 = stringFlux1.window(2);
        stringFlux2.flatMap(flux1 ->flux1.map(word ->word.toUpperCase()))
                .subscribe(System.out::println);
        //從嵌套Flux還原字符串Flux
        Flux<String> stringFlux3 = stringFlux2.flatMap(flux1 ->flux1);
        // stringFlux1 等於 stringFlux3
        stringFlux3.subscribe(System.out::println);
    }
}

BaseTestCase.java

package com.example.reactor;

import java.util.Arrays;
import java.util.List;

public class BaseTestCase {
    protected static final List<Employee> list = Arrays.asList(
            new Employee(1, "Alex", 1000),
            new Employee(2, "Michael", 2000),
            new Employee(3, "Jack", 1500),
            new Employee(4, "Owen", 1500),
            new Employee(5, "Denny", 2000));
}

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