PHP Unconference Europe 2015

GearmanClient::addTaskHigh

(PECL gearman >= 0.5.0)

GearmanClient::addTaskHighAdd a high priority task to run in parallel

Descrierea

public GearmanTask GearmanClient::addTaskHigh ( string $function_name , string $workload [, mixed &$context [, string $unique ]] )

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.

Parametri

function_name

O funcție înregistrată pe care trebuie să o execute serverul executor

workload

Datele serializate pentru a fi procesate

context

Contextul aplicației pentru a fi asociat cu o sarcină

unique

Un ID unical utilizat pentru a identifica o anumită sarcină

Valorile întoarse

A GearmanTask object or FALSE if the task could not be added.

Exemple

Example #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.

<?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 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";
    exit;
}
echo 
"DONE\n";

function 
reverse_complete($task)
{
    echo 
"COMPLETE: " $task->unique() . ", " $task->data() . "\n";
}

?>

Exemplul de mai sus va afișa ceva similar cu:

COMPLETE: 2, Hello World!
COMPLETE: 3, !dlroW olleH
COMPLETE: 1, !dlroW olleH
DONE

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