GearmanClient::doBackground

(PECL gearman >= 0.5.0)

GearmanClient::doBackground — Run a task in the background

说明

public GearmanClient::doBackground ( string $function_name , string $workload [, string $unique ] ) : string

Runs a task in the background, returning a job handle which can be used to get the status of the running task.

参数

function_name: 由程序自动执行的已注册函数。
workload: 被处理的序列化数据。
unique: 用于标识特定任务的唯一性 ID。

返回值

The job handle for the submitted task.

范例

Example #1 Submit and monitor a background job

The worker in this example has an artificial delay introduced to mimic a long running job. The client script periodically checks the status of the running job.

 <?php

/* create our object */
$gmclient= new GearmanClient();

/* add the default server */
$gmclient->addServer();

/* run reverse client */
$job_handle = $gmclient->doBackground("reverse", "this is a test");

if ($gmclient->returnCode() != GEARMAN_SUCCESS)
{
  echo "bad return code\n";
  exit;
}

$done = false;
do
{
   sleep(3);
   $stat = $gmclient->jobStatus($job_handle);
   if (!$stat[0]) // the job is known so it is not done
      $done = true;
   echo "Running: " . ($stat[1] ? "true" : "false") . ", numerator: " . $stat[2] . ", denomintor: " . $stat[3] . "\n";
}
while(!$done);

echo "done!\n";

?>

以上例程的输出类似于：

Running: true, numerator: 3, denomintor: 14
Running: true, numerator: 6, denomintor: 14
Running: true, numerator: 9, denomintor: 14
Running: true, numerator: 12, denomintor: 14
Running: false, numerator: 0, denomintor: 0
done!

参见

GearmanClient::doNormal() - Run a single task and return a result
GearmanClient::doHigh() - Run a single high priority task
GearmanClient::doLow() - Run a single low priority task
GearmanClient::doHighBackground() - Run a high priority task in the background
GearmanClient::doLowBackground() - Run a low priority task in the background