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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* Fluent Bit
* ==========
* Copyright (C) 2019-2021 The Fluent Bit Authors
* Copyright (C) 2015-2018 Treasure Data Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "fluent-bit/flb_config.h"
#include "fluent-bit/flb_mem.h"
#include "fluent-bit/flb_str.h"
#include "fluent-bit/flb_utils.h"
#include "monkey/mk_core/mk_list.h"
#include <fluent-bit/flb_kafka.h>
#include <fluent-bit/flb_kv.h>
#include <rdkafka.h>
rd_kafka_conf_t *flb_kafka_conf_create(struct flb_kafka *kafka,
struct mk_list *properties,
int with_group_id)
{
struct mk_list *head;
struct flb_kv *kv;
const char *conf;
rd_kafka_conf_t *kafka_cfg;
char errstr[512];
kafka_cfg = rd_kafka_conf_new();
if (!kafka_cfg) {
flb_error("[flb_kafka] Could not initialize kafka config object");
goto err;
}
conf = flb_config_prop_get("client_id", properties);
if (!conf) {
conf = "fluent-bit";
}
if (rd_kafka_conf_set(kafka_cfg, "client.id", conf,
errstr, sizeof(errstr)) != RD_KAFKA_CONF_OK) {
flb_error("[flb_kafka] cannot configure client id: %s", errstr);
}
if (with_group_id) {
conf = flb_config_prop_get("group_id", properties);
if (!conf) {
conf = "fluent-bit";
}
if (rd_kafka_conf_set(kafka_cfg, "group.id", conf,
errstr, sizeof(errstr)) != RD_KAFKA_CONF_OK) {
flb_error("[flb_kafka] cannot configure group id: %s", errstr);
}
}
conf = flb_config_prop_get("brokers", properties);
if (conf) {
if (rd_kafka_conf_set(kafka_cfg, "bootstrap.servers", conf,
errstr, sizeof(errstr)) != RD_KAFKA_CONF_OK) {
flb_error("[flb_kafka] failed to configure brokers: %s", errstr);
goto err;
}
kafka->brokers = flb_strdup(conf);
}
else {
flb_error("config: no brokers defined");
goto err;
}
/* Iterate custom rdkafka properties */
mk_list_foreach(head, properties) {
kv = mk_list_entry(head, struct flb_kv, _head);
if (strncasecmp(kv->key, "rdkafka.", 8) == 0 &&
flb_sds_len(kv->key) > 8) {
if (rd_kafka_conf_set(kafka_cfg, kv->key + 8, kv->val,
errstr, sizeof(errstr)) != RD_KAFKA_CONF_OK) {
flb_error("[flb_kafka] cannot configure '%s' property", kv->key + 8);
}
}
}
return kafka_cfg;
err:
if (kafka_cfg) {
flb_free(kafka_cfg);
}
return NULL;
}
static int add_topic_partitions(rd_kafka_topic_partition_list_t *list,
const char *topic_str,
const char *partitions_str)
{
int ret = -1;
struct mk_list *split;
char *str, *end;
int start, stop;
size_t len;
split = flb_utils_split(partitions_str, '-', -1);
if (!split) {
flb_error("[flb_kafka] Failed to split partitions string");
goto end;
}
len = mk_list_size(split);
if (len == 1) {
str = mk_list_entry(split->next, struct flb_split_entry, _head)->value;
start = strtol(str, &end, 10);
if (end == str || *end != '\0') {
flb_error("[flb_kafka] invalid partition \"%s\"", str);
goto end;
}
// single partition
rd_kafka_topic_partition_list_add(list, topic_str, start);
} else if (len == 2) {
str = mk_list_entry(split->next, struct flb_split_entry, _head)->value;
start = strtol(str, &end, 10);
if (end == str || *end != '\0') {
flb_error("[flb_kafka] invalid partition \"%s\"", str);
goto end;
}
str = mk_list_entry(split->next->next, struct flb_split_entry, _head)->value;
stop = strtol(str, &end, 10);
if (end == str || *end != '\0') {
flb_error("[flb_kafka] invalid partition \"%s\"", str);
goto end;
}
rd_kafka_topic_partition_list_add_range(list, topic_str, start, stop);
} else {
flb_error("[flb_kafka] invalid partition range string \"%s\"", partitions_str);
goto end;
}
ret = 0;
end:
if (split) {
flb_utils_split_free(split);
}
return ret;
}
rd_kafka_topic_partition_list_t *flb_kafka_parse_topics(const char *topics_str)
{
rd_kafka_topic_partition_list_t *ret;
struct mk_list *split = NULL;
struct mk_list *partitions = NULL;
struct mk_list *curr;
struct flb_split_entry *entry;
struct flb_split_entry *topic_entry;
struct flb_split_entry *partitions_entry;
size_t len;
ret = rd_kafka_topic_partition_list_new(1);
if (!ret) {
flb_error("[flb_kafka] Failed to allocate topic list");
goto err;
}
split = flb_utils_split(topics_str, ',', -1);
if (!split) {
flb_error("[flb_kafka] Failed to split topics string");
goto err;
}
mk_list_foreach(curr, split) {
entry = mk_list_entry(curr, struct flb_split_entry, _head);
partitions = flb_utils_split(entry->value, ':', -1);
if (!partitions) {
flb_error("[flb_kafka] Failed to split topic string");
goto err;
}
len = mk_list_size(partitions);
if (len == 1) {
rd_kafka_topic_partition_list_add(ret, entry->value, 0);
} else if (len == 2) {
topic_entry = mk_list_entry(
partitions->next, struct flb_split_entry, _head);
partitions_entry = mk_list_entry(
partitions->next->next, struct flb_split_entry, _head);
if (add_topic_partitions(ret, topic_entry->value, partitions_entry->value)) {
goto err;
}
} else {
flb_error("[flb_kafka] Failed to parse topic/partition string");
goto err;
}
flb_utils_split_free(partitions);
}
flb_utils_split_free(split);
return ret;
err:
if (ret) {
rd_kafka_topic_partition_list_destroy(ret);
}
if (split) {
flb_utils_split_free(split);
}
if (partitions) {
flb_utils_split_free(partitions);
}
return NULL;
}
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