In this example, the basic reverse client extended to run two tasks in parallel.
The reverse worker is unchanged except to add sending of data back during processing.
<?php
# create the gearman client
$gmc= new GearmanClient();
# add the default server (localhost)
$gmc->addServer();
# register some callbacks
$gmc->setCreatedCallback("reverse_created");
$gmc->setDataCallback("reverse_data");
$gmc->setStatusCallback("reverse_status");
$gmc->setCompleteCallback("reverse_complete");
$gmc->setFailCallback("reverse_fail");
# set some arbitrary application data
$data['foo'] = 'bar';
# add two tasks
$task= $gmc->addTask("reverse", "foo", $data);
$task2= $gmc->addTaskLow("reverse", "bar", NULL);
# run the tasks in parallel (assuming multiple workers)
if (! $gmc->runTasks())
{
echo "ERROR " . $gmc->error() . "\n";
exit;
}
echo "DONE\n";
function reverse_created($task)
{
echo "CREATED: " . $task->jobHandle() . "\n";
}
function reverse_status($task)
{
echo "STATUS: " . $task->jobHandle() . " - " . $task->taskNumerator() .
"/" . $task->taskDenominator() . "\n";
}
function reverse_complete($task)
{
echo "COMPLETE: " . $task->jobHandle() . ", " . $task->data() . "\n";
}
function reverse_fail($task)
{
echo "FAILED: " . $task->jobHandle() . "\n";
}
function reverse_data($task)
{
echo "DATA: " . $task->data() . "\n";
}
?>
<?php
echo "Starting\n";
# Create our worker object.
$gmworker= new GearmanWorker();
# Add default server (localhost).
$gmworker->addServer();
# Register function "reverse" with the server. Change the worker function to
# "reverse_fn_fast" for a faster worker with no output.
$gmworker->addFunction("reverse", "reverse_fn");
print "Waiting for job...\n";
while($gmworker->work())
{
if ($gmworker->returnCode() != GEARMAN_SUCCESS)
{
echo "return_code: " . $gmworker->returnCode() . "\n";
break;
}
}
function reverse_fn($job)
{
echo "Received job: " . $job->handle() . "\n";
$workload = $job->workload();
$workload_size = $job->workloadSize();
echo "Workload: $workload ($workload_size)\n";
# This status loop is not needed, just showing how it works
for ($x= 0; $x < $workload_size; $x++)
{
echo "Sending status: " . ($x + 1) . "/$workload_size complete\n";
$job->sendStatus($x+1, $workload_size);
$job->sendData(substr($workload, $x, 1));
sleep(1);
}
$result= strrev($workload);
echo "Result: $result\n";
# Return what we want to send back to the client.
return $result;
}
# A much simpler and less verbose version of the above function would be:
function reverse_fn_fast($job)
{
return strrev($job->workload());
}
?>
Il precedente esempio visualizzerà
qualcosa simile a:
% php reverse_worker.php
Starting
Waiting for job...
Received job: H:foo.local:45
Workload: foo (3)
1/3 complete
2/3 complete
3/3 complete
Result: oof
Received job: H:foo.local:44
Workload: bar (3)
1/3 complete
2/3 complete
3/3 complete
Result: rab
% php reverse_client_task.php
CREATED: H:foo.local:44
CREATED: H:foo.local:45
STATUS: H:foo.local:45 - 1/3
DATA: f
STATUS: H:foo.local:45 - 2/3
DATA: o
STATUS: H:foo.local:45 - 3/3
DATA: o
COMPLETE: H:foo.local:45, oof
STATUS: H:foo.local:44 - 1/3
DATA: b
STATUS: H:foo.local:44 - 2/3
DATA: a
STATUS: H:foo.local:44 - 3/3
DATA: r
COMPLETE: H:foo.local:44, rab
DONE