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Example #1 Basic Gearman client and worker
This example shows a very simple client and worker. The client sends a string to the job server, and the worker reverses the string and sends it back. The job is performed synchronously.
<?php
# Create our client object.
$gmclient = new GearmanClient ();
# Add default server (localhost).
$gmclient -> addServer ();
echo "Sending job\n" ;
# Send reverse job
do
{
$result = $gmclient -> do ( "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 :
echo "Success: $result \n" ;
break;
default:
echo "RET: " . $gmclient -> returnCode () . "\n" ;
exit;
}
}
while( $gmclient -> returnCode () != GEARMAN_SUCCESS );
?>
<?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 , $workload_size );
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 ());
}
?>
以上例程的输出类似于:
% php reverse_worker.php Starting Waiting for job... Received job: H:foo.local:36 Workload: Hello! (6) Sending status: 1/6 complete Sending status: 2/6 complete Sending status: 3/6 complete Sending status: 4/6 complete Sending status: 5/6 complete Sending status: 6/6 complete Result: !olleH
% php reverse_client.php Starting Sending job Status: 1/6 complete Status: 2/6 complete Status: 3/6 complete Status: 4/6 complete Status: 5/6 complete Status: 6/6 complete Success: !olleH