GearmanClient::addTaskHigh

(PECL gearman >= 0.5.0)

GearmanClient::addTaskHigh — Add a high priority task to run in parallel

说明

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.

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

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" ;
}

 ?>

以上例程的输出类似于：

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

参见

GearmanClient::addTask() - Add a task to be run in parallel
GearmanClient::addTaskLow() - Add a low 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