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146 lines
4.4 KiB
C++
146 lines
4.4 KiB
C++
/* ------------------------------------------------------------------------ */
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/* Copyright 2002-2012, OpenNebula Project Leads (OpenNebula.org) */
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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 DATASTORE_H_
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#define DATASTORE_H_
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#include "PoolSQL.h"
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#include "ObjectCollection.h"
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#include "DatastoreTemplate.h"
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/**
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* The Datastore class.
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*/
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class Datastore : public PoolObjectSQL, ObjectCollection
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{
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public:
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/**
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* Function to print the Datastore object into a string in XML format
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* @param xml the resulting XML string
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* @return a reference to the generated string
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*/
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string& to_xml(string& xml) const;
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/**
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* Rebuilds the object from an xml formatted string
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* @param xml_str The xml-formatted string
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*
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* @return 0 on success, -1 otherwise
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*/
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int from_xml(const string &xml_str);
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/**
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* Adds this image's ID to the set.
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* @param id of the image to be added to the Datastore
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* @return 0 on success
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*/
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int add_image(int id)
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{
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return add_collection_id(id);
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}
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/**
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* Deletes this image's ID from the set.
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* @param id of the image to be deleted from the Datastore
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* @return 0 on success
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*/
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int del_image(int id)
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{
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return del_collection_id(id);
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}
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private:
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// -------------------------------------------------------------------------
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// Friends
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// -------------------------------------------------------------------------
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friend class DatastorePool;
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// *************************************************************************
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// Datastore Private Attributes
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// *************************************************************************
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/**
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* Type of driver
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*/
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string type;
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/**
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* Base path for the storage
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*/
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string base_path;
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// *************************************************************************
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// Constructor
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// *************************************************************************
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Datastore(int id, DatastoreTemplate* ds_template);
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virtual ~Datastore(){};
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// *************************************************************************
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// DataBase implementation (Private)
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// *************************************************************************
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static const char * db_names;
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static const char * db_bootstrap;
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static const char * table;
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/**
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* Execute an INSERT or REPLACE Sql query.
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* @param db The SQL DB
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* @param replace Execute an INSERT or a REPLACE
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* @param error_str Returns the error reason, if any
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* @return 0 one success
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*/
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int insert_replace(SqlDB *db, bool replace, string& error_str);
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/**
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* Bootstraps the database table(s) associated to the Datastore
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* @return 0 on success
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*/
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static int bootstrap(SqlDB * db)
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{
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ostringstream oss(Datastore::db_bootstrap);
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return db->exec(oss);
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};
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/**
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* Writes the Datastore in the database.
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* @param db pointer to the db
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* @return 0 on success
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*/
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int insert(SqlDB *db, string& error_str);
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/**
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* Writes/updates the Datastore's data fields in the database.
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* @param db pointer to the db
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* @return 0 on success
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*/
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int update(SqlDB *db)
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{
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string error_str;
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return insert_replace(db, true, error_str);
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}
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};
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#endif /*DATASTORE_H_*/
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