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/* Copyright (c) 2017-2018 Dovecot authors, see the included COPYING file */
#include "stats-common.h"
#include "array.h"
#include "str.h"
#include "stats-dist.h"
#include "strescape.h"
#include "connection.h"
#include "ostream.h"
#include "master-service.h"
#include "stats-metrics.h"
#include "stats-settings.h"
#include "client-reader.h"
#include "client-writer.h"
struct reader_client {
struct connection conn;
};
static struct connection_list *reader_clients = NULL;
void client_reader_create(int fd)
{
struct reader_client *client;
client = i_new(struct reader_client, 1);
connection_init_server(reader_clients, &client->conn,
"stats-reader", fd, fd);
}
static void reader_client_destroy(struct connection *conn)
{
connection_deinit(conn);
i_free(conn);
master_service_client_connection_destroyed(master_service);
}
static void reader_client_dump_stats(string_t *str, struct stats_dist *stats,
const char *const *fields)
{
for (unsigned int i = 0; fields[i] != NULL; i++) {
const char *field = fields[i];
str_append_c(str, '\t');
if (strcmp(field, "count") == 0)
str_printfa(str, "%u", stats_dist_get_count(stats));
else if (strcmp(field, "sum") == 0)
str_printfa(str, "%"PRIu64, stats_dist_get_sum(stats));
else if (strcmp(field, "min") == 0)
str_printfa(str, "%"PRIu64, stats_dist_get_min(stats));
else if (strcmp(field, "max") == 0)
str_printfa(str, "%"PRIu64, stats_dist_get_max(stats));
else if (strcmp(field, "avg") == 0)
str_printfa(str, "%.02f", stats_dist_get_avg(stats));
else if (strcmp(field, "median") == 0)
str_printfa(str, "%"PRIu64, stats_dist_get_median(stats));
else if (strcmp(field, "variance") == 0)
str_printfa(str, "%.02f", stats_dist_get_variance(stats));
else if (field[0] == '%') {
str_printfa(str, "%"PRIu64,
stats_dist_get_percentile(stats, strtod(field+1, NULL)/100.0));
} else {
/* return unknown fields as empty */
}
}
}
static void reader_client_dump_metric(string_t *str, const struct metric *metric,
const char *const *fields)
{
reader_client_dump_stats(str, metric->duration_stats, fields);
for (unsigned int i = 0; i < metric->fields_count; i++) {
str_append_c(str, '\t');
str_append_tabescaped(str, metric->fields[i].field_key);
reader_client_dump_stats(str, metric->fields[i].stats, fields);
}
str_append_c(str, '\n');
}
static void
reader_client_append_sub_name(string_t *str, const char *sub_name)
{
for (; *sub_name != '\0'; sub_name++) {
switch (*sub_name) {
case '\t':
case '\n':
case '\r':
case ' ':
str_append_c(str, '_');
break;
default:
str_append_c(str, *sub_name);
}
}
}
static void
reader_client_dump_sub_metrics(struct ostream *output, const struct metric *metric,
const char *sub_name, const char *const *fields)
{
size_t root_pos, name_pos;
struct metric *const *sub_metrics;
if (!array_is_created(&metric->sub_metrics))
return;
string_t *str = t_str_new(128);
reader_client_append_sub_name(str, sub_name);
str_append_c(str, '_');
root_pos = str->used;
array_foreach(&metric->sub_metrics, sub_metrics) {
str_truncate(str, root_pos);
reader_client_append_sub_name(str, (*sub_metrics)->sub_name);
name_pos = str->used;
reader_client_dump_metric(str, *sub_metrics, fields);
o_stream_nsend(output, str_data(str), str_len(str));
str_truncate(str, name_pos);
reader_client_dump_sub_metrics(output, *sub_metrics,
str_c(str), fields);
}
}
static int
reader_client_input_dump(struct reader_client *client, const char *const *args)
{
struct stats_metrics_iter *iter;
const struct metric *metric;
o_stream_cork(client->conn.output);
iter = stats_metrics_iterate_init(stats_metrics);
while ((metric = stats_metrics_iterate(iter)) != NULL) T_BEGIN {
string_t *str = t_str_new(128);
str_append_tabescaped(str, metric->name);
reader_client_dump_metric(str, metric, args);
o_stream_nsend(client->conn.output, str_data(str), str_len(str));
reader_client_dump_sub_metrics(client->conn.output, metric,
metric->name, args);
} T_END;
o_stream_nsend(client->conn.output, "\n", 1);
stats_metrics_iterate_deinit(&iter);
o_stream_uncork(client->conn.output);
return 1;
}
static int
reader_client_input_dump_reset(struct reader_client *client,
const char *const *args)
{
(void)reader_client_input_dump(client, args);
stats_metrics_reset(stats_metrics);
return 1;
}
static int
reader_client_input_metrics_add(struct reader_client *client,
const char *const *args)
{
const char *error;
if (str_array_length(args) < 7) {
e_error(client->conn.event, "METRICS-ADD: Not enough parameters");
return -1;
}
struct stats_metric_settings set = {
.metric_name = args[0],
.description = args[1],
.fields = args[2],
.group_by = args[3],
.filter = args[4],
.exporter = args[5],
.exporter_include = args[6],
};
o_stream_cork(client->conn.output);
if (stats_metrics_add_dynamic(stats_metrics, &set, &error)) {
client_writer_update_connections();
o_stream_nsend(client->conn.output, "+", 1);
} else {
o_stream_nsend(client->conn.output, "-", 1);
o_stream_nsend_str(client->conn.output, "METRICS-ADD: ");
o_stream_nsend_str(client->conn.output, error);
}
o_stream_nsend(client->conn.output, "\n", 1);
o_stream_uncork(client->conn.output);
return 1;
}
static int
reader_client_input_metrics_remove(struct reader_client *client,
const char *const *args)
{
if (str_array_length(args) < 1) {
e_error(client->conn.event, "METRICS-REMOVE: Not enough parameters");
return -1;
}
if (stats_metrics_remove_dynamic(stats_metrics, args[0])) {
client_writer_update_connections();
o_stream_nsend(client->conn.output, "+\n", 2);
} else {
o_stream_nsend_str(client->conn.output,
t_strdup_printf("-metrics '%s' not found\n", args[0]));
}
return 1;
}
static int
reader_client_input_args(struct connection *conn, const char *const *args)
{
struct reader_client *client = (struct reader_client *)conn;
const char *cmd = args[0];
if (cmd == NULL) {
i_error("Client sent empty line");
return 1;
}
args++;
if (strcmp(cmd, "DUMP") == 0)
return reader_client_input_dump(client, args);
else if (strcmp(cmd, "METRICS-ADD") == 0)
return reader_client_input_metrics_add(client, args);
else if (strcmp(cmd, "METRICS-REMOVE") == 0)
return reader_client_input_metrics_remove(client, args);
else if (strcmp(cmd, "DUMP-RESET") == 0)
return reader_client_input_dump_reset(client, args);
return 1;
}
static struct connection_settings client_set = {
.service_name_in = "stats-reader-client",
.service_name_out = "stats-reader-server",
.major_version = 2,
.minor_version = 0,
.input_max_size = 1024,
.output_max_size = SIZE_MAX,
.client = FALSE,
};
static const struct connection_vfuncs client_vfuncs = {
.destroy = reader_client_destroy,
.input_args = reader_client_input_args,
};
void client_readers_init(void)
{
reader_clients = connection_list_init(&client_set, &client_vfuncs);
}
void client_readers_deinit(void)
{
connection_list_deinit(&reader_clients);
}
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