GEARMAN_WORKER_DEFINE_FUNCTION(3) Gearmand GEARMAN_WORKER_DEFINE_FUNCTION(3)NAMEgearman_worker_define_function - Gearmand Documentation, http://gear‐
man.info/
SYNOPSIS
#include <libgearman/gearman.h>
gearman_return_t gearman_worker_define_function(gear‐
man_worker_st *worker, const char *function_name, const size_t func‐
tion_name_length, const gearman_function_t function, const
uint32_t timeout, void *context)
gearman_function_fn
gearman_aggregator_fn
Link with -lgearman
DESCRIPTIONgearman_worker_define_function() defines functions for a worker.
The interface is callback by design. When the server has a job for the
worker, gearman_function_fn is evoked with a gearman_job_st represent‐
ing the job, and the context that was defined originally when the func‐
tion was defined.
Results are sent back to the client by invoking gear‐
man_job_send_data().
If the client specified an reducer function, then the output of the
gearman_function_fn will be sent to that function. You can split the
work out to the reducer function by sending data multiple times with
gearman_job_send_data().
If any errors are detected then the entire job is cancelled. The
gearman_aggregator_fn will be called when all mapped jobs have com‐
pleted. The result of this function will be what is returned to the
client.
The callback function needs to return one of the following errors:
GEARMAN_SUCCESS
The function was successful.
GEARMAN_FATAL
An error has occurred, the job we not processed, and the worker cannot
continue.
GEARMAN_ERROR
A transient error has occurred, like a network failure, and the job can
be restarted.
If a value other then the above are returned it is converted to a GEAR‐
MAN_FATAL and gearman_worker_work() returns GEARMAN_INVALID_ARGUMENT.
gearman_job_send_complete() and gearman_job_send_fail() cannot be used
with any functions created with gearman_worker_define_function().
RETURN VALUE
gearman_return_t
HOME
To find out more information please check: http://gearman.info/
SEE ALSOgearmand(8)libgearman(3)gearman_strerror(3) gearman_client_error
gearman_client_execute_reduce
AUTHOR
Data Differential http://datadifferential.com/
COPYRIGHT
2011, Data Differential, http://datadifferential.com/
0.23 June 29, 201GEARMAN_WORKER_DEFINE_FUNCTION(3)
