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Run a task in the background


GearmanClient::doBackground

(PECL gearman >= 0.5.0)

GearmanClient::doBackgroundRun a task in the background

Description

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

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

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

Return Values

The job handle for the submitted task.

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! 

See Also



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