GEARMAN_CLIENT_DO_LOW(3)

NAME
gearman_client_do_low - Gearmand Documentation, https://gearman.org/gearmand/

SYNOPSIS

#include <libgearman/gearman.h>

void *gearman_client_do(gearman_client_st *client, const char *function_name, const char *unique, const void *workload, size_t workload_size, size_t *result_size, gearman_return_t *ret_ptr)

    Changed in version 0.21: GEARMAN_PAUSE will no longer be returned. A do operation will now run till completion or error.

void *gearman_client_do_high(gearman_client_st *client, const char *function_name, const char *unique, const void *workload, size_t workload_size, size_t *result_size, gearman_return_t *ret_ptr)

void *gearman_client_do_low(gearman_client_st *client, const char *function_name, const char *unique, const void *workload, size_t workload_size, size_t *result_size, gearman_return_t *ret_ptr)

DESCRIPTION

gearman_client_do() executes a single request to the gearmand server and waits for a reply.

gearman_client_do_high() and gearman_client_do_low() are identical to gearman_client_do(), only they set the priority to either high or low.

Job assignment priority is global across registered functions. A high priority job for any function is assigned before normal or low priority jobs for other functions.

All of the functions will block until either a response or an error is returned.

RETURN VALUE

gearman_client_do() returns a pointer to a value that the caller must release. If ret_ptr is provided any errors that have occurred will be stored in it. Since a NULL/zero value is a valid value, you will always need to check ret_ptr if you are concerned with errors.

EXAMPLE

    /*
    # Gearman server and library
    # Copyright (C) 2012 Data Differential, http://datadifferential.com/
    # All rights reserved.
    #
    # Use and distribution licensed under the BSD license.  See
    # the COPYING file in this directory for full text.
    */
    #include <string.h>
    #include <stdlib.h>
    #include <libgearman/gearman.h>
    int main(void)
    {
      gearman_client_st *client= gearman_client_create(NULL);
      gearman_return_t ret= gearman_client_add_server(client, "localhost", 0);
      if (gearman_failed(ret))
      {
        return EXIT_FAILURE;
      }
      size_t result_size;
      gearman_return_t rc;
      void *value= gearman_client_do(client, "reverse_function", "unique_value",
                                     "my string to reverse", strlen("my string to reverse"),
                                     &result_size, &rc);
      if (gearman_success(rc))
      {
        // Make use of value
      }
      free(value);
      gearman_client_free(client);
      return 0;
    }

HOME

To find out more information please check: https://gearman.org/gearmand/

SEE ALSO: gearmand(8) libgearman(3) gearman_strerror(3)

AUTHOR
Data Differential http://www.datadifferential.com/

COPYRIGHT
2011-2014, Data Differential, http://www.datadifferential.com/