taskpool异步任务支持串行处理的方法

import taskpool from '@ohos.taskpool'
taskpool.Task
taskpool.execute

@Concurrent   
function inspectStatus(arg: number): number {   
  hilog.info(0x0000, 'testTag', 'start inspectStatus: %{public}d', arg);   
  // 2s sleep   
  let t: number = Date.now();   
  while (Date.now() - t < 2000) {   
    continue;   
  }   
  hilog.info(0x0000, 'testTag', 'end inspectStatus: %{public}d', arg);   
  return arg + 1;   
}   
   
let allCount = 3;   
for (let i: number = 0; i < allCount; i++) {   
  let task1: taskpool.Task = new taskpool.Task(inspectStatus, 100); // 100: test number   
  let task2: taskpool.Task = new taskpool.Task(inspectStatus, 200); // 200: test number   
  let task3: taskpool.Task = new taskpool.Task(inspectStatus, 300); // 300: test number   
  taskpool.execute(task1, taskpool.Priority.LOW);   
  taskpool.execute(task2, taskpool.Priority.MEDIUM);   
  taskpool.execute(task3, taskpool.Priority.HIGH);   
}

@Concurrent   
function testSerialHandle(arg: number): number {   
  hilog.info(0x0000, 'testTag', 'testSerialHandle: %{public}d', arg);   
  return arg + 1;   
}   
   
let task4: taskpool.Task = new taskpool.Task(testSerialHandle, 400); // 400: test number   
let task5: taskpool.Task = new taskpool.Task(testSerialHandle, 500); // 500: test number   
let task6: taskpool.Task = new taskpool.Task(testSerialHandle, 600); // 600: test number   
taskpool.execute(task4).then((value: number) => {   
  if (value == 401) {   
    taskpool.execute(task5).then((value2: number) => {   
      if (value2 == 501) {   
        taskpool.execute(task6);   
      }   
    });   
  }   
});