Gearman::Task - a task in Gearman, from the point of view of a client
my $task = Gearman::Task->new("add", "1+2", { ... }); $taskset->add_task($task); $client->do_task($task); $client->dispatch_background($task);
Gearman::Task is a Gearman::Client's representation of a task to be done.
Creates a new Gearman::Task object, and returns the object.
$func is the function name to be run. (that you have a worker registered to process)
$arg is an opaque scalar or scalarref representing the argument(s) to pass to the distributed function. If you want to pass multiple arguments, you must encode them somehow into this one. That's up to you and your worker.
%options can contain:
uniq
A key which indicates to the server that other tasks with the same function name and key will be merged into one. That is, the task will be run just once, but all the listeners waiting on that job will get the response multiplexed back to them.
Uniq may also contain the magic value "-" (a single hyphen) which means the uniq key is the contents of the args.
on_complete
A subroutine reference to be invoked when the task is completed. The subroutine will be passed a reference to the return value from the worker process.
on_fail
A subroutine reference to be invoked when the task fails (or fails for the last time, if retries were specified). The reason could be passed to this callback as an argument. This callback won't be called after a failure if more retries are still possible.
on_retry
A subroutine reference to be invoked when the task fails, but is about to be retried.
Is passed one argument, what retry attempt number this is. (starts with 1)
on_status
A subroutine reference to be invoked if the task emits status updates. Arguments passed to the subref are ($numerator, $denominator), where those are left up to the client and job to determine.
retry_count
Number of times job will be retried if there are failures. Defaults to 0.
high_priority
Boolean, whether this job should take priority over other jobs already enqueued.
timeout
Automatically fail, calling your on_fail callback, after this many seconds have elapsed without an on_fail or on_complete being called. Defaults to 0, which means never. Bypasses any retry_count remaining.
try_timeout
Automatically fail, calling your on_retry callback (or on_fail if out of retries), after this many seconds have elapsed. Defaults to 0, which means never.
run a hook callback if defined
add a hook
return bool: whether or not task is totally done (on_failure or on_complete callback has been called)
getter
setter
return Gearman::Taskset
return undef on non-uniq packet, or the hash value (0-32767) if uniq
return Gearman::Util::pack_req_command(mode, func, uniq, argref)
run if !is_finished
on_post_hooks
$exc_ref may be a Storable serialized value
run on_exception if defined
$result a reference profided to on_complete cb
$result
setter for the fully-qualified handle of form "IP:port//shandle" where
shandle is an opaque handle specific to the job server running on IP:port
cleanup
hooks
return timeout
return mode in depends of background and hight_priority
To install Gearman::Job, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Gearman::Job
CPAN shell
perl -MCPAN -e shell install Gearman::Job
For more information on module installation, please visit the detailed CPAN module installation guide.