(PECL gearman >= 0.5.0)
GearmanClient::addTaskHigh — Add a high priority task to run in parallel
Adds a high priority task to be run in parallel with other tasks. Call this method for all the high priority tasks to be run in parallel, then call GearmanClient::runTasks() to perform the work. Tasks with a high priority will be selected from the queue before 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.
Exemplo #1 A high priority task along with two normal tasks
A high priority task is included among two other tasks. A single worker is available, so that tasks are run one at a time, with the high priority task run first.
# 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 high priority
$task= $gmc->addTask("reverse", "Hello World!", null, "1");
$task= $gmc->addTaskHigh("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";
O exemplo acima irá imprimir algo similar à:
COMPLETE: 2, Hello World! COMPLETE: 3, !dlroW olleH COMPLETE: 1, !dlroW olleH DONE