GearmanClient::addTask

(PECL gearman >= 0.5.0)

GearmanClient::addTask — Add a task to be run in parallel

说明

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

Adds a 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. Note that enough workers need to be available for the tasks to all run in parallel.

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 Basic submission of two tasks


<?php

# Create our gearman client
$gmclient= new GearmanClient(); 

# add the default job server
$gmclient->addServer(); 

# set a function to be called when the work is complete
$gmclient->setCompleteCallback("complete"); 

# add a task to perform the "reverse" function on the string "Hello World!"
$gmclient->addTask("reverse", "Hello World!", null, "1"); 

# add another task to perform the "reverse" function on the string "!dlroW olleH"
$gmclient->addTask("reverse", "!dlroW olleH", null, "2"); 

# run the tasks
$gmclient->runTasks(); 

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

?>

以上例程的输出类似于：

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

Example #2 Basic submission of two tasks with passing application context


<?php

$client = new GearmanClient();
$client->addServer();

# set a function to be called when the work is complete
$client->setCompleteCallback("reverse_complete");

# Add some tasks for a placeholder of where to put the results
$results = array();
$client->addTask("reverse", "Hello World!", &$results, "t1");
$client->addTask("reverse", "!dlroW olleH", &$results, "t2");

$client->runTasks();

# The results should now be filled in from the callbacks
foreach ($results as $id => $result)
   echo $id . ": " . $result['handle'] . ", " . $result['data'] . "\n";


function reverse_complete($task, $results)
{
   $results[$task->unique()] = array("handle"=>$task->jobHandle(), "data"=>$task->data());
}

?>

以上例程的输出类似于：

t2: H.foo:21, Hello World!
t1: H:foo:22, !dlroW olleH

参见

GearmanClient::addTaskHigh() - Add a high priority task to 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