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GearmanClient::addTaskStatus

Contents

(PECL gearman >= 0.5.0)

GearmanClient::addTaskStatus — Add a task to get status

Description

public GearmanClient::addTaskStatus ( string $job_handle [, string &$context ] ) : GearmanTask

Used to request status information from the Gearman server, which will call the specified status callback (set using GearmanClient::setStatusCallback()).

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Parameters

job_handle

The job handle for the task to get status for

context

Data to be passed to the status callback, generally a reference to an array or object

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Examples

Example #1 Monitor completion of multiple background tasks

An artificial delay is introduced in the worker in this example to simulate a long running process. There is only one worker running for this example.

<?php

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

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

/* start some background jobs and save the handles */
$handles = array();
$handles[0] = $gmclient->doBackground("reverse", "Hello World!");
$handles[1] = $gmclient->doBackground("reverse", "!dlroW olleH");

$gmclient->setStatusCallback("reverse_status");

/* Poll the server to see when those background jobs finish; */
/* a better method would be to use event callbacks */
do
{
   /* Use the context variable to track how many tasks have completed */
   $done = 0;
   $gmclient->addTaskStatus($handles[0], &$done);
   $gmclient->addTaskStatus($handles[1], &$done);
   $gmclient->runTasks();
   echo "Done: $done\n";
   sleep(1);
}
while ($done != 2);

function reverse_status($task, $done)
{
   if (!$task->isKnown())
      $done++;
}

?>

The above example will output something similar to:

Done: 0
Done: 0
Done: 0
Done: 0
Done: 0
Done: 0
Done: 0
Done: 0
Done: 0
Done: 0
Done: 0
Done: 0
Done: 1
Done: 1
Done: 1
Done: 1
Done: 1
Done: 1
Done: 1
Done: 1
Done: 1
Done: 1
Done: 1
Done: 1
Done: 2

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Document created the 30/01/2003, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/php-rf-gearmanclient.addtaskstatus.html

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References

  1. View the html document Language of the document:fr Manuel PHP : http://php.net

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