1GEARMAN_WORKER_DEFINE_FUNCTION(3)  Gearmand  GEARMAN_WORKER_DEFINE_FUNCTION(3)
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NAME

6       gearman_worker_define_function  -  Gearmand Documentation, http://gear‐
7       man.info/
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SYNOPSIS

10       #include <libgearman/gearman.h>
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12       gearman_function_t
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14       gearman_return_t                   gearman_worker_define_function(gear‐
15       man_worker_st *worker,  const  char *function_name,  const size_t func‐
16       tion_name_length,     const     gearman_function_t function,      const
17       uint32_t timeout, void *context)
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19       gearman_function_fn
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21       gearman_aggregator_fn
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23       Link with -lgearman
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DESCRIPTION

26       gearman_worker_define_function() defines functions for a worker.
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28       The  interface is callback by design. When the server has a job for the
29       worker, gearman_function_fn is evoked with a gearman_job_st  represent‐
30       ing the job, and the context that was defined originally when the func‐
31       tion was defined.
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33       Results   are   sent   back   to   the   client   by   invoking   gear‐
34       man_job_send_data().
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36       If  the  client  specified  an reducer function, then the output of the
37       gearman_function_fn will be sent to that function. You  can  split  the
38       work  out  to  the reducer function by sending data multiple times with
39       gearman_job_send_data().
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41       If any errors are detected then  the  entire  job  is  cancelled.   The
42       gearman_aggregator_fn  will  be  called  when all mapped jobs have com‐
43       pleted. The result of this function will be what  is  returned  to  the
44       client.
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46       The callback function needs to return one of the following errors:
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48       GEARMAN_SUCCESS
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50       The function was successful.
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52       GEARMAN_FAIL
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54       An  error has occurred, the job we not processed, and the worker cannot
55       continue.
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57       GEARMAN_ERROR
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59       A transient error has occurred, like a network failure, and the job can
60       be restarted.
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62       If a value other then the above are returned it is converted to a GEAR‐
63       MAN_FAIL and gearman_worker_work() returns GEARMAN_INVALID_ARGUMENT.
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65       gearman_job_send_complete() and gearman_job_send_fail() cannot be  used
66       with any functions created with gearman_worker_define_function().
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RETURN VALUE

69       gearman_return_t
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HOME

72       To find out more information please check: http://gearman.info/
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SEE ALSO

75       gearmand(8)   libgearman(3)   gearman_strerror(3)  gearman_client_error
76       gearman_client_execute_reduce
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AUTHOR

79       Data Differential http://www.datadifferential.com/
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82       2011-2014, Data Differential, http://www.datadifferential.com/
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871.1.19.1                         Feb 18, 2020GEARMAN_WORKER_DEFINE_FUNCTION(3)
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