GearmanClient::do

(PECL gearman >= 0.5.0)

GearmanClient::doRun a single task and return a result [deprecated]

Descrizione

public GearmanClient::do(string $function_name, string $workload, string $unique = ?): string

The GearmanClient::do() method is deprecated as of pecl/gearman 1.0.0. Use GearmanClient::doNormal().

Elenco dei parametri

function_name

La funzione che il worker deve eseguire

workload

I dati serializzati da processare

unique

Un ID unico che identifica un particolare task

Valori restituiti

A string representing the results of running a task.

Esempi

Example #1 Simple job submission with immediate return

<?php

# Client code

echo "Starting\n";

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

# Add default server (localhost).
$gmclient->addServer();

echo
"Sending job\n";

$result = $gmclient->doNormal("reverse", "Hello!");

echo
"Success: $result\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($job)
{
return
strrev($job->workload());
}

?>

Il precedente esempio visualizzerĂ  qualcosa simile a:

Starting
Sending job
Success: !olleH

Example #2 Submitting a job and retrieving incremental status

A job is submitted and the script loops to retrieve status information. The worker has an artificial delay which results in a long running job and sends status and data as processing occurs. Each subsequent call to GearmanClient::do() produces status information on the running job.

<?php

# Client code

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

# Add default server (localhost).
$gmclient->addServer();

echo
"Sending job\n";

# Send reverse job
do
{
$result = $gmclient->doNormal("reverse", "Hello!");
# Check for various return packets and errors.

switch($gmclient->returnCode())
{
case
GEARMAN_WORK_DATA:
echo
"Data: $result\n";
break;
case
GEARMAN_WORK_STATUS:
list(
$numerator, $denominator)= $gmclient->doStatus();
echo
"Status: $numerator/$denominator complete\n";
break;
case
GEARMAN_WORK_FAIL:
echo
"Failed\n";
exit;
case
GEARMAN_SUCCESS:
break;
default:
echo
"RET: " . $gmclient->returnCode() . "\n";
echo
"Error: " . $gmclient->error() . "\n";
echo
"Errno: " . $gmclient->getErrno() . "\n";
exit;
}
}
while(
$gmclient->returnCode() != GEARMAN_SUCCESS);

echo
"Success: $result\n";

?>
<?php

# Worker code

echo "Starting\n";

# Create our worker object.
$gmworker= new GearmanWorker();

# Add default server (localhost).
$gmworker->addServer();

# Register function "reverse" with the server.
$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;
}

?>

Il precedente esempio visualizzerĂ  qualcosa simile a:

Worker output:

Starting
Waiting for job...
Received job: H:foo.local:106
Workload: Hello! (6)
1/6 complete
2/6 complete
3/6 complete
4/6 complete
5/6 complete
6/6 complete
Result: !olleH

Client output:

Starting
Sending job
Status: 1/6 complete
Data: H
Status: 2/6 complete
Data: e
Status: 3/6 complete
Data: l
Status: 4/6 complete
Data: l
Status: 5/6 complete
Data: o
Status: 6/6 complete
Data: !
Success: !olleH

Vedere anche:

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User Contributed Notes 1 note

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0
Shane Harter
14 years ago
Note that this isn't blocking -- that do() will return as soon as the job is accepted by the Gearman jobserver.

That lets you do..while until the return code is success or failure as you see in the examples.
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