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/**
* collectd - src/write_redis.c
* Copyright (C) 2010 Florian Forster
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Authors:
* Florian Forster <ff at octo.it>
**/
#include "collectd.h"
#include "plugin.h"
#include "common.h"
#include "configfile.h"
#include <pthread.h>
#include <credis.h>
struct wr_node_s
{
char name[DATA_MAX_NAME_LEN];
char *host;
int port;
int timeout;
REDIS conn;
pthread_mutex_t lock;
};
typedef struct wr_node_s wr_node_t;
/*
* Functions
*/
static int wr_write (const data_set_t *ds, /* {{{ */
const value_list_t *vl,
user_data_t *ud)
{
wr_node_t *node = ud->data;
char ident[512];
char key[512];
char value[512];
size_t value_size;
char *value_ptr;
int status;
int i;
status = FORMAT_VL (ident, sizeof (ident), vl);
if (status != 0)
return (status);
ssnprintf (key, sizeof (key), "collectd/%s", ident);
memset (value, 0, sizeof (value));
value_size = sizeof (value);
value_ptr = &value[0];
#define APPEND(...) do { \
status = snprintf (value_ptr, value_size, __VA_ARGS__); \
if (((size_t) status) > value_size) \
{ \
value_ptr += value_size; \
value_size = 0; \
} \
else \
{ \
value_ptr += status; \
value_size -= status; \
} \
} while (0)
APPEND ("%lu", (unsigned long) vl->time);
for (i = 0; i < ds->ds_num; i++)
{
if (ds->ds[i].type == DS_TYPE_COUNTER)
APPEND ("%llu", vl->values[i].counter);
else if (ds->ds[i].type == DS_TYPE_GAUGE)
APPEND ("%g", vl->values[i].gauge);
else if (ds->ds[i].type == DS_TYPE_DERIVE)
APPEND ("%"PRIi64, vl->values[i].derive);
else if (ds->ds[i].type == DS_TYPE_ABSOLUTE)
APPEND ("%"PRIu64, vl->values[i].absolute);
else
assert (23 == 42);
}
#undef APPEND
pthread_mutex_lock (&node->lock);
if (node->conn == NULL)
{
node->conn = credis_connect (node->host, node->port, node->timeout);
if (node->conn == NULL)
{
ERROR ("write_redis plugin: Connecting to host \"%s\" (port %i) failed.",
(node->host != NULL) ? node->host : "localhost",
(node->port != 0) ? node->port : 6379);
pthread_mutex_unlock (&node->lock);
return (-1);
}
}
/* "credis_zadd" doesn't handle a NULL pointer gracefully, so I'd rather
* have a meaningful assertion message than a normal segmentation fault. */
assert (node->conn != NULL);
status = credis_zadd (node->conn, key, (double) vl->time, value);
credis_sadd (node->conn, "collectd/values", ident);
pthread_mutex_unlock (&node->lock);
return (0);
} /* }}} int wr_write */
static void wr_config_free (void *ptr) /* {{{ */
{
wr_node_t *node = ptr;
if (node == NULL)
return;
if (node->conn != NULL)
{
credis_close (node->conn);
node->conn = NULL;
}
sfree (node->host);
sfree (node);
} /* }}} void wr_config_free */
static int wr_config_node (oconfig_item_t *ci) /* {{{ */
{
wr_node_t *node;
int status;
int i;
node = malloc (sizeof (*node));
if (node == NULL)
return (ENOMEM);
memset (node, 0, sizeof (*node));
node->host = NULL;
node->port = 0;
node->timeout = 1000;
node->conn = NULL;
pthread_mutex_init (&node->lock, /* attr = */ NULL);
status = cf_util_get_string_buffer (ci, node->name, sizeof (node->name));
if (status != 0)
{
sfree (node);
return (status);
}
for (i = 0; i < ci->children_num; i++)
{
oconfig_item_t *child = ci->children + i;
if (strcasecmp ("Host", child->key) == 0)
status = cf_util_get_string (child, &node->host);
else if (strcasecmp ("Port", child->key) == 0)
{
status = cf_util_get_port_number (child);
if (status > 0)
{
node->port = status;
status = 0;
}
}
else if (strcasecmp ("Timeout", child->key) == 0)
status = cf_util_get_int (child, &node->timeout);
else
WARNING ("write_redis plugin: Ignoring unknown config option \"%s\".",
child->key);
if (status != 0)
break;
} /* for (i = 0; i < ci->children_num; i++) */
if (status == 0)
{
char cb_name[DATA_MAX_NAME_LEN];
user_data_t ud;
ssnprintf (cb_name, sizeof (cb_name), "write_redis/%s", node->name);
ud.data = node;
ud.free_func = wr_config_free;
status = plugin_register_write (cb_name, wr_write, &ud);
}
if (status != 0)
wr_config_free (node);
return (status);
} /* }}} int wr_config_node */
static int wr_config (oconfig_item_t *ci) /* {{{ */
{
int i;
for (i = 0; i < ci->children_num; i++)
{
oconfig_item_t *child = ci->children + i;
if (strcasecmp ("Node", child->key) == 0)
wr_config_node (child);
else
WARNING ("write_redis plugin: Ignoring unknown "
"configuration option \"%s\" at top level.", child->key);
}
return (0);
} /* }}} int wr_config */
void module_register (void)
{
plugin_register_complex_config ("write_redis", wr_config);
}
/* vim: set sw=2 sts=2 tw=78 et fdm=marker : */
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