GearmanClient::setCompleteCallback

(PECL gearman >= 0.5.0)

GearmanClient::setCompleteCallback — Set a function to be called on task completion

Description

public GearmanClient::setCompleteCallback(callable $callback): bool

Use to set a callback function to be called when a GearmanTask is completed, or when GearmanJob::sendComplete() is invoked by a worker (whichever happens first).

This callback executes only when executing a GearmanTask using GearmanClient::runTasks(). It is not used for individual jobs.

Note:
The callback will only be triggered for tasks that are added (e.g. by calling GearmanClient::addTask()) after calling this method.

Parameters

callback

A function or method to call. It should return a valid Gearman return value.

If no return statement is present, it defaults to GEARMAN_SUCCESS.

callback(GearmanTask $task, mixed $context): int

task: The task this callback is called for.
context: Whatever has been passed to GearmanClient::addTask() (or equivalent method) as context.

Return Values

Returns true on success or false on failure.

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User Contributed Notes

Justas Butkus

13 years ago

One shall note, that callback function MUST either return a valid Gearman status code, or return nothing (do not return).

I.e. these are valid complete callbacks:

<?php
function goodCallbackOne(GearmanTask $task)
{
    print_r($task);
}
?>

<?php
function goodCallbackTwo(GearmanTask $task)
{
    print_r($task);
    return GEARMAN_SUCCESS;
}
?>

While following is NOT, unless you want your client code to fail with Gearman error 'german wait:no active file descriptors':

<?php
function badCallbackTwo(GearmanTask $task)
{
    print_r($task);
    return true;
}
?>