PHP Unconference Europe 2015

GearmanClient::do

(PECL gearman >= 0.5.0)

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

Descrierea

public string GearmanClient::do ( string $function_name , string $workload [, string $unique ] )

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

Parametri

function_name

O funcție înregistrată pe care trebuie să o execute serverul executor

workload

Datele serializate pentru a fi procesate

unique

Un ID unical utilizat pentru a identifica o anumită sarcină

Valorile întoarse

A string representing the results of running a task.

Exemple

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());
}

?>

Exemplul de mai sus va afișa ceva similar cu:

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 ($x0$x $workload_size$x++)
  {
    echo 
"Sending status: " $x "/$workload_size complete\n";
    
$job->sendStatus($x+1$workload_size);
    
$job->sendData(substr($workload$x1));
    
sleep(1);
  }

  
$resultstrrev($workload);
  echo 
"Result: $result\n";

  
# Return what we want to send back to the client.
  
return $result;
}

?>

Exemplul de mai sus va afișa ceva similar cu:

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

Vedeți de asemenea

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User Contributed Notes 1 note

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1
Shane Harter
4 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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