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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* Fluent Bit
* ==========
* Copyright (C) 2015-2022 The Fluent Bit Authors
*
* 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_mem.h>
#include <fluent-bit/flb_str.h>
#include <fluent-bit/flb_log.h>
#include <fluent-bit/flb_sqldb.h>
/*
* Open or create a new database. Note that this function will always try to
* use an open database and share it handler in as a new context.
*/
struct flb_sqldb *flb_sqldb_open(const char *path, const char *desc,
struct flb_config *config)
{
int ret;
struct mk_list *head;
struct flb_sqldb *db_temp = NULL;
struct flb_sqldb *db;
sqlite3 *sdb = NULL;
db = flb_malloc(sizeof(struct flb_sqldb));
if (!db) {
flb_errno();
return NULL;
}
db->parent = NULL;
db->shared = FLB_FALSE;
db->users = 0;
/*
* The database handler can be shared across different instances of
* Fluent Bit. Before to open a new one, try to find a database that
* is already open.
*/
mk_list_foreach(head, &config->sqldb_list) {
db_temp = mk_list_entry(head, struct flb_sqldb, _head);
/* Only lookup for original database, not contexts already shared */
if (db_temp->shared == FLB_TRUE) {
continue;
}
if (strcmp(db_temp->path, path) == 0) {
break;
}
db_temp = NULL;
}
/* Found a database that can be shared */
if (db_temp) {
/* Increase users counter */
db_temp->users++;
/* Setup the new context */
db->handler = db_temp->handler;
db->shared = FLB_TRUE;
db->parent = db_temp;
}
else {
ret = sqlite3_open(path, &sdb);
if (ret) {
flb_error("[sqldb] cannot open database %s", path);
flb_free(db);
return NULL;
}
db->handler = sdb;
}
db->path = flb_strdup(path);
db->desc = flb_strdup(desc);
mk_list_add(&db->_head, &config->sqldb_list);
return db;
}
int flb_sqldb_close(struct flb_sqldb *db)
{
struct flb_sqldb *parent;
if (db->shared == FLB_TRUE) {
parent = db->parent;
parent->users--;
}
else {
sqlite3_close(db->handler);
}
mk_list_del(&db->_head);
flb_free(db->path);
flb_free(db->desc);
flb_free(db);
return 0;
}
int flb_sqldb_query(struct flb_sqldb *db, const char *sql,
int (*callback) (void *, int, char **, char **),
void *data)
{
int ret;
char *err_msg = NULL;
ret = sqlite3_exec(db->handler, sql, callback, data, &err_msg);
if (ret != SQLITE_OK) {
flb_error("[sqldb] error=%s", err_msg);
sqlite3_free(err_msg);
return FLB_ERROR;
}
return FLB_OK;
}
int64_t flb_sqldb_last_id(struct flb_sqldb *db)
{
return sqlite3_last_insert_rowid(db->handler);
}
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