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/* Gearman server and library
* Copyright (C) 2008 Brian Aker, Eric Day
* All rights reserved.
*
* Use and distribution licensed under the BSD license. See
* the COPYING file in the parent directory for full text.
*/
/**
* @file
* @brief Example Worker
*/
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <libgearman/gearman.h>
typedef enum
{
REVERSE_WORKER_OPTIONS_NONE= 0,
REVERSE_WORKER_OPTIONS_DATA= (1 << 0),
REVERSE_WORKER_OPTIONS_STATUS= (1 << 1),
REVERSE_WORKER_OPTIONS_UNIQUE= (1 << 2)
} reverse_worker_options_t;
static void *reverse(gearman_job_st *job, void *context,
size_t *result_size, gearman_return_t *ret_ptr);
static void usage(char *name);
int main(int argc, char *argv[])
{
int c;
uint32_t count= 0;
char *host= NULL;
in_port_t port= 0;
reverse_worker_options_t options= REVERSE_WORKER_OPTIONS_NONE;
int timeout= -1;
gearman_return_t ret;
gearman_worker_st worker;
while ((c = getopt(argc, argv, "c:dh:p:st:u")) != -1)
{
switch(c)
{
case 'c':
count= (uint32_t)atoi(optarg);
break;
case 'd':
options|= REVERSE_WORKER_OPTIONS_DATA;
break;
case 'h':
host= optarg;
break;
case 'p':
port= (in_port_t)atoi(optarg);
break;
case 's':
options|= REVERSE_WORKER_OPTIONS_STATUS;
break;
case 't':
timeout= atoi(optarg);
break;
case 'u':
options|= REVERSE_WORKER_OPTIONS_UNIQUE;
break;
default:
usage(argv[0]);
exit(1);
}
}
if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
{
fprintf(stderr, "signal:%d\n", errno);
exit(1);
}
if (gearman_worker_create(&worker) == NULL)
{
fprintf(stderr, "Memory allocation failure on worker creation\n");
exit(1);
}
if (options & REVERSE_WORKER_OPTIONS_UNIQUE)
gearman_worker_add_options(&worker, GEARMAN_WORKER_GRAB_UNIQ);
if (timeout >= 0)
gearman_worker_set_timeout(&worker, timeout);
ret= gearman_worker_add_server(&worker, host, port);
if (ret != GEARMAN_SUCCESS)
{
fprintf(stderr, "%s\n", gearman_worker_error(&worker));
exit(1);
}
ret= gearman_worker_add_function(&worker, "reverse", 0, reverse,
&options);
if (ret != GEARMAN_SUCCESS)
{
fprintf(stderr, "%s\n", gearman_worker_error(&worker));
exit(1);
}
while (1)
{
ret= gearman_worker_work(&worker);
if (ret != GEARMAN_SUCCESS)
{
fprintf(stderr, "%s\n", gearman_worker_error(&worker));
break;
}
if (count > 0)
{
count--;
if (count == 0)
break;
}
}
gearman_worker_free(&worker);
return 0;
}
static void *reverse(gearman_job_st *job, void *context,
size_t *result_size, gearman_return_t *ret_ptr)
{
reverse_worker_options_t options= *((reverse_worker_options_t *)context);
const uint8_t *workload;
uint8_t *result;
size_t x;
size_t y;
workload= gearman_job_workload(job);
*result_size= gearman_job_workload_size(job);
result= malloc(*result_size);
if (result == NULL)
{
fprintf(stderr, "malloc:%d\n", errno);
*ret_ptr= GEARMAN_WORK_FAIL;
return NULL;
}
for (y= 0, x= *result_size; x; x--, y++)
{
result[y]= ((uint8_t *)workload)[x - 1];
if (options & REVERSE_WORKER_OPTIONS_DATA)
{
*ret_ptr= gearman_job_send_data(job, &(result[y]), 1);
if (*ret_ptr != GEARMAN_SUCCESS)
{
free(result);
return NULL;
}
}
if (options & REVERSE_WORKER_OPTIONS_STATUS)
{
*ret_ptr= gearman_job_send_status(job, (uint32_t)y,
(uint32_t)*result_size);
if (*ret_ptr != GEARMAN_SUCCESS)
{
free(result);
return NULL;
}
sleep(1);
}
}
printf("Job=%s%s%s Workload=%.*s Result=%.*s\n", gearman_job_handle(job),
options & REVERSE_WORKER_OPTIONS_UNIQUE ? " Unique=" : "",
options & REVERSE_WORKER_OPTIONS_UNIQUE ? gearman_job_unique(job) : "",
(int)*result_size, workload, (int)*result_size, result);
*ret_ptr= GEARMAN_SUCCESS;
if (options & REVERSE_WORKER_OPTIONS_DATA)
{
*result_size= 0;
return NULL;
}
return result;
}
static void usage(char *name)
{
printf("\nusage: %s [-h <host>] [-p <port>]\n", name);
printf("\t-c <count> - number of jobs to run before exiting\n");
printf("\t-d - send result back in data chunks\n");
printf("\t-h <host> - job server host\n");
printf("\t-p <port> - job server port\n");
printf("\t-s - send status updates and sleep while running job\n");
printf("\t-t <timeout> - timeout in milliseconds\n");
printf("\t-u - when grabbing jobs, grab the uniqie id\n");
}
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