(PECL gearman >= 0.5.0)
GearmanClient::addTask — Add a task to be run in parallel
$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.
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。
A GearmanTask object or FALSE if the task could not be added.
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
sfinktah at php dot spamtrak dot org (2011-04-05 18:04:49)
To create a matching worker, capable of executing multiple jobs simultaneously, I came up with this. It's a slight hack, but it works.
<?php
do {
$pid = false;
$gmw= new GearmanWorker();
$gmw->addServer("");
$gmw->addFunction("lookup7", "lookup7_fast", $args);
@$gmw->work();
} while ($pid);
function lookup7_fast($job) {
global $pid;
if ($pid = pcntl_fork()) {
return $job->setReturn(GEARMAN_WORK_STATUS);
}
return do_work($job->workload());
};
?>