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jqv8gg681 at relay dot firefox dot com ¶
3 years ago
Combining recommendations from brainreflex and iloveapplepie, as well as hours of testing. This avoids some bugs in cross versions of gearman across platforms. 
It steps though the server list and fails if all are inaccessible.
I also use the same override as "class SmartGearmanClient extends GearmanClient" for the clients.

<?php // WORKER
class SmartGearmanWorker extends GearmanWorker
{
    public $server = false;
    public function connect($servers = array( array('host' => '127.0.0.1', 'port' => '4730') ))
    {
        $connected = false;
        foreach ($servers as $server) {
            $c = new GearmanClient();
            $c->addServer($server['host'], $server['port'], false);
    
            if (@$c->ping('ping')) {              
                $this->addServer($server['host'], $server['port']);
                $connected=true;
                $this->server = array(
                   'host'=>$server['host'],
                   'port'=>$server['port']
                );
                break; // Remove this to use last working server in list
            }
        }
        return $connected;
    }
}

echo "Starting\n";

# Add some servers
$servers = array(
    array('host' => '127.0.0.1', 'port' => '4730'),
    array('host' => '127.0.0.1', 'port' => '4731'),
    array('host' => '127.0.0.1', 'port' => '4732'),
    array('host' => '127.0.0.2', 'port' => '4730'),
    array('host' => '192.168.204.10', 'port' => '4730')
);

# Create our worker object.
$gmw= new SmartGearmanWorker();

if ($gmw->connect($servers)) {
    # Register function "reverseString" with the server. 
    $gmw->addFunction("reverseString", "reverseString_fn");

    print "Connected to {$gmw->server['host']}:{$gmw->server['port']}...\n";
    print "Waiting for jobs...\n";

    while ($gmw->work()) {
        if ($gmw->returnCode() != GEARMAN_SUCCESS) {
            echo "return_code: " . $gmw->returnCode() . "\n";
            break;
        }
    }

    echo "DONE\n";
} else {
    echo "Unable to connect to any gearman-job-servers.".PHP_EOL;
};

function reverseString_fn($job)
{
    echo "Received job: " . $job->handle() . "\n";
 
    $workload = $job->workload();
    $workload_size = $job->workloadSize();

    echo "Workload: $workload ($workload_size)\n";

    # Lets send some progress information
    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;
}
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