OpenHarmony应用开发-线程间通讯与任务管理

import emitter from "@ohos.events.emitter";

// 定义一个eventId为1的事件
let event = {
    eventId: 1
};

// 收到eventId为1的事件后执行该回调
let callback = (eventData) => {
    console.info('event callback');
};

// 订阅eventId为1的事件
emitter.on(event, callback);

import emitter from "@ohos.events.emitter";

// 定义一个eventId为1的事件，事件优先级为Low
let event = {
    eventId: 1,
    priority: emitter.EventPriority.LOW
};

let eventData = {
    data: {
        "content": "c",
        "id": 1,
        "isEmpty": false,
    }
};

// 发送eventId为1的事件，事件内容为eventData
emitter.emit(event, eventData);

  "buildOption": {
    "sourceOption": {
      "workers": [
        "./src/main/ets/workers/worker.ts"
      ]
    }
  }

import worker from '@ohos.worker';

let parent = worker.workerPort;

// 处理来自主线程的消息
parent.onmessage = function(message) {
    console.info("onmessage: " + message)
    // 发送消息到主线程
    parent.postMessage("message from worker thread.")
}

import worker from '@ohos.worker';

let wk = new worker.ThreadWorker("entry/ets/workers/worker.ts");

// 发送消息到worker线程
wk.postMessage("message from main thread.")

// 处理来自worker线程的消息
wk.onmessage = function(message) {
    console.info("message from worker: " + message)

    // 根据业务按需停止worker线程
    wk.terminate()
}

import worker from '@ohos.worker';

let wk = new worker.ThreadWorker("../workers/worker.ts");

// 发送消息到worker线程
wk.postMessage("message from main thread.")

// 处理来自worker线程的消息
wk.onmessage = function(message) {
    console.info("message from worker: " + message)

    // 根据业务按需停止worker线程
    wk.terminate()
}

import missionManager from '@ohos.app.ability.missionManager'

let listener = {
    // 任务创建
    onMissionCreated: function (mission) {
        console.info("--------onMissionCreated-------")
    },
    // 任务销毁
    onMissionDestroyed: function (mission) {
        console.info("--------onMissionDestroyed-------")
    },
    // 任务快照变化
    onMissionSnapshotChanged: function (mission) {
        console.info("--------onMissionSnapshotChanged-------")
    },
    // 任务被移动到前台
    onMissionMovedToFront: function (mission) {
        console.info("--------onMissionMovedToFront-------")
    },
    // 任务图标变化
    onMissionIconUpdated: function (mission, icon) {
        console.info("--------onMissionIconUpdated-------")
    },
    // 任务名称变化
    onMissionLabelUpdated: function (mission) {
        console.info("--------onMissionLabelUpdated-------")
    },
    // 任务实例被关闭
    onMissionClosed: function (mission) {
        console.info("--------onMissionClosed-------")
    }
};

// 1.注册任务变化通知
let listenerId = missionManager.on('mission', listener);

// 2.获取系统最近20个任务
missionManager.getMissionInfos("", 20, (error, missions) => {
    console.info("getMissionInfos is called, error.code = " + error.code);
    console.info("size = " + missions.length);
    console.info("missions = " + JSON.stringify(missions));
});

// 3.获取单个任务的详细信息()
let missionId = 11; // 11只是示例，实际是从系统中获取的任务id，下面类似
let mission = missionManager.getMissionInfo("", missionId).catch(function (err) {
    console.info(err);
});

// 4.获取任务快照
missionManager.getMissionSnapShot("", missionId, (error, snapshot) => {
    console.info("getMissionSnapShot is called, error.code = " + error.code);
    console.info("bundleName = " + snapshot.ability.bundleName);
})

// 5.获取低分辨任务快照
missionManager.getLowResolutionMissionSnapShot("", missionId, (error, snapshot) => {
    console.info("getLowResolutionMissionSnapShot is called, error.code = " + error.code);
    console.info("bundleName = " + snapshot.ability.bundleName);
})

// 6.加锁/解锁任务
missionManager.lockMission(missionId).then(() => {
    console.info("lockMission is called ");
});

missionManager.unlockMission(missionId).then(() => {
    console.info("unlockMission is called ");
});

// 7.把任务切到前台
missionManager.moveMissionToFront(missionId).then(() => {
    console.info("moveMissionToFront is called ");
});

// 8.删除单个任务
missionManager.clearMission(missionId).then(() => {
    console.info("clearMission is called ");
});

// 9.删除全部任务
missionManager.clearAllMissions().catch(function (err) {
    console.info(err);
});

// 10.解注册任务变化通知
missionManager.off('mission', listenerId, (error) => {
    console.info("unregisterMissionListener");
})