GearmanClient::addTaskStatus
(PECL gearman >= 0.5.0)
GearmanClient::addTaskStatus — Add a task to get status
Description
Used to request status information from the Gearman server, which will call the specified status callback (set using GearmanClient::setStatusCallback()).
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
Return Values
A GearmanTask object.
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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