mirror of
https://github.com/OpenNebula/one.git
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135 lines
3.6 KiB
C++
135 lines
3.6 KiB
C++
/* -------------------------------------------------------------------------- */
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/* Copyright 2002-2015, 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 <sys/time.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "NebulaLog.h"
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#include "SqlDB.h"
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#include "ObjectSQL.h"
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using namespace std;
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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(string& db_name);
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~SqliteDB();
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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(ostringstream& cmd, Callbackable* obj=0, bool quiet=false);
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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 string& str);
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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);
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/**
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* Returns true if the syntax INSERT VALUES (data), (data), (data)
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* is supported
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*
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* @return true if supported
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*/
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bool multiple_values_support();
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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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pthread_mutex_t 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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* Function to lock the DB
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*/
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void lock()
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{
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pthread_mutex_lock(&mutex);
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};
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/**
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* Function to unlock the DB
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*/
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void unlock()
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{
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pthread_mutex_unlock(&mutex);
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};
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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(string& db_name)
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{
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throw runtime_error("Aborting oned, Sqlite support not compiled!");
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};
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~SqliteDB(){};
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int exec(ostringstream& cmd, Callbackable* obj=0, bool quiet=false){return -1;};
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char * escape_str(const string& str){return 0;};
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void free_str(char * str){};
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bool multiple_values_support(){return true;};
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};
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#endif
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#endif /*SQLITE_DB_H_*/
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