(PECL gearman >= 0.5.0)
GearmanClient::addTaskLow — Add a low priority task to run in parallel
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.
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.
# create the gearman client
$gmc= new GearmanClient();
# add the default job server
# set the callback for when the job is 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";
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