Php/docs/gearmanclient.addtasklow
GearmanClient::addTaskLow
(PECL gearman >= 0.5.0)
GearmanClient::addTaskLow — Add a low priority task to run in parallel
Description
public GearmanClient::addTaskLow
( string $function_name
, string $workload
[, mixed &$context
[, string $unique
]] ) : GearmanTask
Adds a low priority background task to be run in parallel with other tasks. Call this method for all the tasks to be run in parallel, then call GearmanClient::runTasks() to perform the work. Tasks with a low priority will be selected from the queue after those of normal or low priority.
Parameters
function_name- A registered function the worker is to execute
workload- Serialized data to be processed
context- Application context to associate with a task
unique- A unique ID used to identify a particular task
Examples
Example #1 A low priority task along with two normal tasks
A low priority task is included among two other tasks. A single worker is available, so that tasks are run one at a time, with the low priority task run last.
<?php# create the gearman client$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
See Also
- GearmanClient::addTask() - Add a task to be run in parallel
- GearmanClient::addTaskHigh() - Add a high priority task to run in parallel
- GearmanClient::addTaskBackground() - Add a background task to be run in parallel
- GearmanClient::addTaskHighBackground() - Add a high priority background task to be run in parallel
- GearmanClient::addTaskLowBackground() - Add a low priority background task to be run in parallel
- GearmanClient::runTasks() - Run a list of tasks in parallel
