Adds a low priority background task to be run in parallel with other tasks. Call this method for all the tasks to be run in parallel, then call GearmanClient::runTasks() to perform the work. Tasks with a low priority will be selected from the queue after those of normal or low priority.
A registered function the worker is to execute
Serialized data to be processed
Application context to associate with a task
A unique ID used to identify a particular task
A GearmanTask object or FALSE
if the task could not be added.
A low priority task is included among two other tasks. A single worker is available, so that tasks are run one at a time, with the low priority task run last.
<?php # create the gearman client $gmc= new GearmanClient(); # add the default job server $gmc->addServer(); # set the callback for when the job is complete $gmc->setCompleteCallback("reverse_complete"); # add tasks, one of which is low priority $task= $gmc->addTask("reverse", "Hello World!", null, "1"); $task= $gmc->addTaskLow("reverse", "!dlroW olleH", null, "2"); $task= $gmc->addTask("reverse", "Hello World!", null, "3"); if (! $gmc->runTasks()) { echo "ERROR " . $gmc->error() . "\n"; exit; } echo "DONE\n"; function reverse_complete($task) { echo "COMPLETE: " . $task->unique() . ", " . $task->data() . "\n"; } ?>
The above example will output something similar to:
COMPLETE: 3, !dlroW olleH COMPLETE: 1, !dlroW olleH COMPLETE: 2, Hello World! DONE
GearmanClient::addTaskHigh() -
GearmanClient::addTaskBackground() -
GearmanClient::addTaskHighBackground() -
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