Yii2 队列 shmilyzxt/yii2-queue 简单概述

注释:在$queue->pop($queueName);是vendorshmilyzxtqueuequeuesDatabaseQueue.php方法内使用事务执行SQL,并且创建vendorshmilyzxtqueuejobsDatabaseJob.php的实例

 //取出一个任务
 public function pop($queue = null)
 {
 $queue = $this->getQueue($queue);
 if (!is_null($this->expire)) {
  //$this->releaseJobsThatHaveBeenReservedTooLong($queue);
 }
 $tran = $this->connector->beginTransaction();
 //判断是否有一个可用的任务需要执行
 if ($job = $this->getNextAvailableJob($queue)) {
  $this->markJobAsReserved($job->id);
  $tran->commit();
  $config = array_merge($this->jobEvent, [
  'class' => 'shmilyzxtqueuejobsDatabaseJob',
  'queue' => $queue,
  'job' => $job,
  'queueInstance' => $this,
  ]);
  return Yii::createObject($config);
 }
 $tran->commit();
 return false;
 }

至于:$job->execute();是DatabaseJob继承父类Job执行的,顺着代码找下去是yiibaseComponent trigger执行的事件,

/**
 * 执行任务
 */
public function execute()
{
 $this->trigger(self::EVENT_BEFORE_EXECUTE, new JobEvent(["job" => $this, 'payload' => $this->getPayload()]));//beforeExecute 执行任务之前的一个事件 在JobEvent中并没有什么可执行的代码
 $this->resolveAndFire();//真正执行的任务的方法
}
 /**
 * 真正任务执行方法（调用hander的handle方法）
 * @param array $payload
 * @return void
 */
 protected function resolveAndFire()
 {
  $payload = $this->getPayload();
  $payload = unserialize($payload); //反序列化数据
  $type = $payload['type'];
  $class = $payload['job'];
  if ($type == 'closure' && ($closure = (new Serializer())->unserialize($class[1])) instanceof Closure) {
   $this->handler = $this->getHander($class[0]);
   $this->handler->closure = $closure;
   $this->handler->handle($this, $payload['data']);
  } else if ($type == 'classMethod') {
   $payload['job'][0]->$payload['job'][1]($this, $payload['data']);
  } else if ($type == 'staticMethod') {
   $payload['job'][0]::$payload['job'][1]($this, $payload['data']);
  } else {//执行的`SendMail`类的`handle($job,$data)`方法
   $this->handler = $this->getHander($class);
   $this->handler->handle($this, $payload['data']);
  }
  //执行完任务后删除
  if (!$this->isDeletedOrReleased()) {
   $this->delete();
  }
 }

最后到了执行的SendMail类的handle($job,$data),在这里就是推送到队列的对象和数据,接着就是我们的处理逻辑了.

public function handle($job,$data)
 {
  if($job->getAttempts() > 3){
   $this->failed($job);
  }
  $payload = $job->getPayload();
  echo '<pre>';print_r($payload);
  //$payload即任务的数据，你拿到任务数据后就可以执行发邮件了
  //TODO 发邮件
 }

总结

以上所述是小编给大家介绍的Yii2 队列 shmilyzxt/yii2-queue简介，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对易采站长站网站的支持！