HarmonyOS 多线程数据互通问题

封装网络请求框架，当是在子线程发起的请求的时候，走到网络框架，需要增加公共参数（公共参数都在主线程初始化），这时候只能emit参数到主线程，有没有更好的处理方式？

HarmonyOS

zxjiu

2024-12-23 15:38:34

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回答 1

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回答 1

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put_get

可以使用sendable，参考文档：https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/arkts-sendable-V5

可参考如下代码：

// Sendable01.ets
@Sendable
export class Singleton {
  static instance: Singleton;
  private constructor() {
  }
  static getInstance(): Singleton {
    if(!Singleton.instance) {
      Singleton.instance = new Singleton();
    }
    return Singleton.instance;
  }

  printName(): void {
    console.info("Singleton name: " + this.name)
  }
  modifyName(name: string): void {
    this.name = name;
  }

  increase(): void {
    this.num++;
  }
  decrase(): void {
    this.num--;
  }
  printNum(): void {
    console.info("Singleton num: " + this.num)
  }

  private name: string = "test";
  private num: number = 0;
}

// concurrent.ets
import { Singleton } from "./Sendable01"

@Concurrent
export function testSingleton(arg: Singleton) {
  let obj2 = Singleton.getInstance();
  if (obj2 == arg) {
    console.info("Sendable class Singleton only one")
  } else {
    console.info("Test failed")
  }
  obj2.printName()
  obj2.printNum()
  obj2.increase()
  obj2.increase()
  obj2.modifyName("TestSingleton")
  return arg;
}

// index.ets
import { Singleton } from './Sendable01';
import { testSingleton } from "./concurrent"

let obj1 = Singleton.getInstance();
obj1.printName();
obj1.printNum();
obj1.increase();
obj1.increase();
obj1.modifyName("Singleton");
taskpool.execute(testSingleton, obj1).then((res)=>{
  let obj3 = res as Singleton;
  obj3.printName();
  obj3.printNum();
})