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GearmanClient::addTaskHigh

(PECL gearman >= 0.5.0)

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

说明

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

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.

参数

function_name

由程序自动执行的已注册函数。

workload

被处理的序列化数据。

context

与任务关联的应用程序上下文。

unique

用于标识特定任务的唯一性 ID。

返回值

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

范例

示例 #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";
}

?>

以上例程的输出类似于:

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

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