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GearmanClient::doBackground

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(PECL gearman >= 0.5.0)

GearmanClient::doBackground — Run a task in the background

Description

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.

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Parameters

function_name

A registered function the worker is to execute

workload

Serialized data to be processed

unique

A unique ID used to identify a particular task

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Return Values

The job handle for the submitted task.

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Examples

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";

?>

The above example will output something similar to:

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!

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See Also

Find a PHP function

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Document created the 30/01/2003, last modified the 26/10/2018
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References

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