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one/include/QuotasSQL.h

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/* -------------------------------------------------------------------------- */
2015-09-23 16:03:22 +03:00
/* Copyright 2002-2015, OpenNebula Project, OpenNebula Systems */
/* */
/* 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. */
/* -------------------------------------------------------------------------- */
#ifndef GROUP_QUOTAS_H_
#define GROUP_QUOTAS_H_
#include "Quotas.h"
#include "ObjectSQL.h"
class QuotasSQL : public Quotas, ObjectSQL
{
public:
/**
* Reads the ObjectSQL (identified with its OID) from the database.
* @param oid the Group/User oid
* @param db pointer to the db
* @return 0 on success
*/
int select(int _oid, SqlDB *db)
{
oid = _oid;
return select(db);
};
/**
* Writes the Quotas in the database.
* @param db pointer to the db
* @return 0 on success
*/
int insert(int _oid, SqlDB *db, string& error_str)
{
oid = _oid;
return insert(db, error_str);
};
/**
* Writes/updates the Quotas fields in the database.
* @param db pointer to the db
* @return 0 on success
*/
int update(int _oid, SqlDB *db)
{
oid = _oid;
return update(db);
}
/**
* Removes the Quotas from the database.
* @param db pointer to the db
* @return 0 on success
*/
int drop(SqlDB * db);
protected:
QuotasSQL(const char * ds_xpath,
const char * net_xpath,
const char * img_xpath,
const char * vm_xpath):
Quotas(ds_xpath, net_xpath, img_xpath, vm_xpath, false),
ObjectSQL(),
oid(-1){};
virtual ~QuotasSQL(){};
virtual const char * table() const = 0;
virtual const char * table_names() const = 0;
virtual const char * table_oid_column() const = 0;
int from_xml(const string& xml);
private:
/**
* User/Group oid. Must be set before a DB write operation
*/
int oid;
/**
* Reads the ObjectSQL (identified with its OID) from the database.
* @param db pointer to the db
* @return 0 on success
*/
int select(SqlDB * db);
/**
* Writes the Quotas in the database.
* @param db pointer to the db
* @return 0 on success
*/
int insert(SqlDB *db, string& error_str)
{
return insert_replace(db, false, error_str);
};
/**
* Writes/updates the Quotas fields in the database.
* @param db pointer to the db
* @return 0 on success
*/
int update(SqlDB *db)
{
string error_str;
return insert_replace(db, true, error_str);
}
/**
* Callback function to read a Quotas object (Quotas::select)
* @param num the number of columns read from the DB
* @para names the column names
* @para vaues the column values
* @return 0 on success
*/
int select_cb(void *nil, int num, char **values, char **names);
/**
* Execute an INSERT or REPLACE Sql query.
* @param db The SQL DB
* @param replace Execute an INSERT or a REPLACE
* @param error_str Returns the error reason, if any
* @return 0 one success
*/
int insert_replace(SqlDB *db, bool replace, string& error_str);
/**
* Generates a string representation of the quotas in XML format, enclosed
* in the QUOTAS tag
* @param xml the string to store the XML
* @return the same xml string to use it in << compounds
*/
string& to_xml_db(string& xml) const;
};
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
class GroupQuotas : public QuotasSQL
{
public:
GroupQuotas():QuotasSQL(
"/QUOTAS/DATASTORE_QUOTA",
"/QUOTAS/NETWORK_QUOTA",
"/QUOTAS/IMAGE_QUOTA",
"/QUOTAS/VM_QUOTA"){};
virtual ~GroupQuotas(){};
/**
* Bootstraps the database table for group quotas
* @return 0 on success
*/
static int bootstrap(SqlDB * db)
{
ostringstream oss_quota(GroupQuotas::db_bootstrap);
return db->exec(oss_quota);
};
protected:
const char * table() const
{
return db_table;
};
const char * table_names() const
{
return db_names;
};
const char * table_oid_column() const
{
return db_oid_column;
};
private:
friend class GroupPool;
// *************************************************************************
// DataBase implementation
// *************************************************************************
static const char * db_names;
static const char * db_bootstrap;
static const char * db_table;
static const char * db_oid_column;
};
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
class UserQuotas : public QuotasSQL
{
public:
UserQuotas():QuotasSQL(
"/QUOTAS/DATASTORE_QUOTA",
"/QUOTAS/NETWORK_QUOTA",
"/QUOTAS/IMAGE_QUOTA",
"/QUOTAS/VM_QUOTA"){};
/**
* Bootstraps the database table for user quotas
* @return 0 on success
*/
static int bootstrap(SqlDB * db)
{
ostringstream oss_quota(UserQuotas::db_bootstrap);
return db->exec(oss_quota);
};
protected:
const char * table() const
{
return db_table;
};
const char * table_names() const
{
return db_names;
};
const char * table_oid_column() const
{
return db_oid_column;
};
private:
friend class UserPool;
// *************************************************************************
// DataBase implementation
// *************************************************************************
static const char * db_names;
static const char * db_bootstrap;
static const char * db_table;
static const char * db_oid_column;
};
#endif /*QUOTAS_SQL_H_*/