static int value_list_to_json(char *buffer, size_t buffer_size, /* {{{ */
const data_set_t *ds, const value_list_t *vl,
int store_rates) {
char temp[512];
size_t offset = 0;
int status;
memset(buffer, 0, buffer_size);
#define BUFFER_ADD(...) \
do { \
status = ssnprintf(buffer + offset, buffer_size - offset, __VA_ARGS__); \
if (status < 1) \
return (-1); \
else if (((size_t)status) >= (buffer_size - offset)) \
return (-ENOMEM); \
else \
offset += ((size_t)status); \
} while (0)
/* All value lists have a leading comma. The first one will be replaced with
* a square bracket in `format_json_finalize'. */
BUFFER_ADD(",{");
status = values_to_json(temp, sizeof(temp), ds, vl, store_rates);
if (status != 0)
return (status);
BUFFER_ADD("\"values\":%s", temp);
status = dstypes_to_json(temp, sizeof(temp), ds);
if (status != 0)
return (status);
BUFFER_ADD(",\"dstypes\":%s", temp);
status = dsnames_to_json(temp, sizeof(temp), ds);
if (status != 0)
return (status);
BUFFER_ADD(",\"dsnames\":%s", temp);
BUFFER_ADD(",\"time\":%.3f", CDTIME_T_TO_DOUBLE(vl->time));
BUFFER_ADD(",\"interval\":%.3f", CDTIME_T_TO_DOUBLE(vl->interval));
#define BUFFER_ADD_KEYVAL(key, value) \
do { \
status = json_escape_string(temp, sizeof(temp), (value)); \
if (status != 0) \
return (status); \
BUFFER_ADD(",\"%s\":%s", (key), temp); \
} while (0)
BUFFER_ADD_KEYVAL("host", vl->host);
BUFFER_ADD_KEYVAL("plugin", vl->plugin);
BUFFER_ADD_KEYVAL("plugin_instance", vl->plugin_instance);
BUFFER_ADD_KEYVAL("type", vl->type);
BUFFER_ADD_KEYVAL("type_instance", vl->type_instance);
if (vl->meta != NULL) {
char meta_buffer[buffer_size];
memset(meta_buffer, 0, sizeof(meta_buffer));
status = meta_data_to_json(meta_buffer, sizeof(meta_buffer), vl->meta);
if (status != 0)
return (status);
BUFFER_ADD(",\"meta\":%s", meta_buffer);
} /* if (vl->meta != NULL) */
BUFFER_ADD("}");
#undef BUFFER_ADD_KEYVAL
#undef BUFFER_ADD
DEBUG("format_json: value_list_to_json: buffer = %s;", buffer);
return (0);
} /* }}} int value_list_to_json */
int value_list_to_json (char *buffer, size_t buffer_size, /* {{{ */
const data_set_t *ds, const value_list_t *vl, int store_rates)
{
char temp[512];
size_t offset = 0;
int status;
memset (buffer, 0, buffer_size);
#define BUFFER_ADD(...) do { \
status = ssnprintf (buffer + offset, buffer_size - offset, \
__VA_ARGS__); \
if (status < 1) \
return (-1); \
else if (((size_t) status) >= (buffer_size - offset)) \
return (-ENOMEM); \
else \
offset += ((size_t) status); \
} while (0)
BUFFER_ADD ("{");
status = values_to_json (temp, sizeof (temp), ds, vl, store_rates);
if (status != 0)
return (status);
BUFFER_ADD ("\"values\":%s", temp);
status = dstypes_to_json (temp, sizeof (temp), ds, vl);
if (status != 0)
return (status);
BUFFER_ADD (",\"dstypes\":%s", temp);
status = dsnames_to_json (temp, sizeof (temp), ds, vl);
if (status != 0)
return (status);
BUFFER_ADD (",\"dsnames\":%s", temp);
BUFFER_ADD (",\"time\":%lu", (unsigned long) vl->time);
BUFFER_ADD (",\"interval\":%i", vl->interval);
#define BUFFER_ADD_KEYVAL(key, value) do { \
status = escape_string (temp, sizeof (temp), (value)); \
if (status != 0) \
return (status); \
BUFFER_ADD (",\"%s\":%s", (key), temp); \
} while (0)
BUFFER_ADD_KEYVAL ("host", vl->host);
BUFFER_ADD_KEYVAL ("plugin", vl->plugin);
BUFFER_ADD_KEYVAL ("plugin_instance", vl->plugin_instance);
BUFFER_ADD_KEYVAL ("type", vl->type);
BUFFER_ADD_KEYVAL ("type_instance", vl->type_instance);
BUFFER_ADD ("}");
#undef BUFFER_ADD_KEYVAL
#undef BUFFER_ADD
DEBUG ("format_json: value_list_to_json: buffer = %s;", buffer);
return (0);
} /* }}} int value_list_to_json */
static int value_list_to_kairosdb(char *buffer, size_t buffer_size, /* {{{ */
const data_set_t *ds, const value_list_t *vl,
int store_rates,
char const *const *http_attrs,
size_t http_attrs_num, int data_ttl,
char const *metrics_prefix) {
char temp[512];
size_t offset = 0;
int status;
memset(buffer, 0, buffer_size);
#define BUFFER_ADD(...) \
do { \
status = snprintf(buffer + offset, buffer_size - offset, __VA_ARGS__); \
if (status < 1) \
return -1; \
else if (((size_t)status) >= (buffer_size - offset)) \
return -ENOMEM; \
else \
offset += ((size_t)status); \
} while (0)
#define BUFFER_ADD_KEYVAL(key, value) \
do { \
status = kairosdb_escape_string(temp, sizeof(temp), (value)); \
if (status != 0) \
return status; \
BUFFER_ADD(",\"%s\": %s", (key), temp); \
} while (0)
for (size_t i = 0; i < ds->ds_num; i++) {
/* All value lists have a leading comma. The first one will be replaced with
* a square bracket in `format_kairosdb_finalize'. */
BUFFER_ADD(",{\"name\":\"");
if (metrics_prefix != NULL) {
BUFFER_ADD("%s.", metrics_prefix);
}
BUFFER_ADD("%s", vl->plugin);
status = values_to_kairosdb(temp, sizeof(temp), ds, vl, store_rates, i);
if (status != 0)
return status;
BUFFER_ADD("\", \"datapoints\": %s", temp);
/*
* Now adds meta data to metric as tags
*/
memset(temp, 0, sizeof(temp));
if (data_ttl != 0)
BUFFER_ADD(", \"ttl\": %i", data_ttl);
BUFFER_ADD(", \"tags\":\{");
BUFFER_ADD("\"host\": \"%s\"", vl->host);
for (size_t j = 0; j < http_attrs_num; j += 2) {
BUFFER_ADD(", \"%s\":", http_attrs[j]);
BUFFER_ADD(" \"%s\"", http_attrs[j + 1]);
}
if (strlen(vl->plugin_instance))
BUFFER_ADD_KEYVAL("plugin_instance", vl->plugin_instance);
BUFFER_ADD_KEYVAL("type", vl->type);
if (strlen(vl->type_instance))
BUFFER_ADD_KEYVAL("type_instance", vl->type_instance);
if (ds->ds_num != 1)
BUFFER_ADD_KEYVAL("ds", ds->ds[i].name);
BUFFER_ADD("}}");
} /* for ds->ds_num */
#undef BUFFER_ADD_KEYVAL
#undef BUFFER_ADD
DEBUG("format_kairosdb: value_list_to_kairosdb: buffer = %s;", buffer);
return 0;
} /* }}} int value_list_to_kairosdb */
