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107 lines
3.2 KiB
C++
107 lines
3.2 KiB
C++
/* -------------------------------------------------------------------------- */
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/* Copyright 2002-2023, OpenNebula Project, OpenNebula Systems */
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/* */
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/* Licensed under the Apache License, Version 2.0 (the "License"); you may */
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/* not use this file except in compliance with the License. You may obtain */
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/* a copy of the License at */
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/* */
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/* http://www.apache.org/licenses/LICENSE-2.0 */
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/* */
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/* Unless required by applicable law or agreed to in writing, software */
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/* distributed under the License is distributed on an "AS IS" BASIS, */
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/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
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/* See the License for the specific language governing permissions and */
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/* limitations under the License. */
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/* -------------------------------------------------------------------------- */
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#ifndef SQLITE_DB_H_
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#define SQLITE_DB_H_
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#include <string>
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#include <sstream>
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#include <stdexcept>
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#include "SqlDB.h"
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#include "ObjectSQL.h"
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#ifdef SQLITE_DB
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#include <sqlite3.h>
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/**
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* SqliteDB class. Provides a wrapper to the sqlite3 database interface. It also
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* provides "global" synchronization mechanism to use it in a multithread
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* environment.
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*/
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class SqliteDB : public SqlDB
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{
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public:
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SqliteDB(const std::string& db_name, int timeout);
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~SqliteDB();
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/**
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* This function returns a legal SQL string that can be used in an SQL
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* statement.
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* @param str the string to be escaped
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* @return a valid SQL string or NULL in case of failure
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*/
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char * escape_str(const std::string& str) const override;
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/**
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* Frees a previously scaped string
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* @param str pointer to the str
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*/
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void free_str(char * str) const override;
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protected:
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/**
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* Wraps the sqlite3_exec function call, and locks the DB mutex.
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* @param sql_cmd the SQL command
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* @param callbak function to execute on each data returned, watch the
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* mutex you block in the callback.
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* @param arg to pass to the callback function
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* @return 0 on success
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*/
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int exec_ext(std::ostringstream& cmd, Callbackable *obj, bool quiet) override;
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private:
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/**
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* Fine-grain mutex for DB access
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*/
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std::mutex _mutex;
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/**
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* Pointer to the database.
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*/
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sqlite3 * db;
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};
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#else
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//CLass stub
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class SqliteDB : public SqlDB
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{
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public:
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SqliteDB(const std::string& db_name, int timeout)
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{
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throw std::runtime_error("Aborting oned, Sqlite support not compiled!");
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}
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~SqliteDB() = default;
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char * escape_str(const std::string& str) const override { return 0; }
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void free_str(char * str) const override {};
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protected:
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int exec_ext(std::ostringstream& cmd, Callbackable *obj, bool quiet) override
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{
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return -1;
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}
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};
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#endif
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#endif /*SQLITE_DB_H_*/
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