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/* ------------------------------------------------------------------------ */
/* Copyright 2002-2012, OpenNebula Project Leads (OpenNebula.org) */
/* */
/* 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 CLUSTER_H_
#define CLUSTER_H_
#include "PoolSQL.h"
#include "ObjectCollection.h"
#include "DatastorePool.h"
using namespace std;
/**
* The Cluster class.
*/
class Cluster : public PoolObjectSQL
{
public:
// *************************************************************************
// Object Collections (Public)
// *************************************************************************
/**
* Adds this host ID to the set.
* @param id to be added to the cluster
* @param error_msg Error message, if any
* @return 0 on success
*/
int add_host(int id, string& error_msg)
{
int rc = hosts.add_collection_id(id);
if ( rc < 0 )
{
error_msg = "Host ID is already in the cluster set.";
}
return rc;
}
/**
* Deletes this host ID from the set.
* @param id to be deleted from the cluster
* @param error_msg Error message, if any
* @return 0 on success
*/
int del_host(int id, string& error_msg)
{
int rc = hosts.del_collection_id(id);
if ( rc < 0 )
{
error_msg = "Host ID is not part of the cluster set.";
}
return rc;
}
/**
* Adds this datastore ID to the set.
* @param id to be added to the cluster
* @param error_msg Error message, if any
* @return 0 on success
*/
int add_datastore(int id, string& error_msg)
{
if ( id == DatastorePool::SYSTEM_DS_ID )
{
ostringstream oss;
oss << "Datastore '"<< DatastorePool::SYSTEM_DS_NAME
<< "' cannot be added to any cluster.";
error_msg = oss.str();
return -1;
}
int rc = datastores.add_collection_id(id);
if ( rc < 0 )
{
error_msg = "Datastore ID is already in the cluster set.";
}
return rc;
}
/**
* Deletes this datastore ID from the set.
* @param id to be deleted from the cluster
* @param error_msg Error message, if any
* @return 0 on success
*/
int del_datastore(int id, string& error_msg)
{
int rc = datastores.del_collection_id(id);
if ( rc < 0 )
{
error_msg = "Datastore ID is not part of the cluster set.";
}
return rc;
}
/**
* Adds this vnet ID to the set.
* @param id to be added to the cluster
* @param error_msg Error message, if any
* @return 0 on success
*/
int add_vnet(int id, string& error_msg)
{
int rc = vnets.add_collection_id(id);
if ( rc < 0 )
{
error_msg = "Network ID is already in the cluster set.";
}
return rc;
}
/**
* Deletes this vnet ID from the set.
* @param id to be deleted from the cluster
* @param error_msg Error message, if any
* @return 0 on success
*/
int del_vnet(int id, string& error_msg)
{
int rc = vnets.del_collection_id(id);
if ( rc < 0 )
{
error_msg = "Network ID is not part of the cluster set.";
}
return rc;
}
// *************************************************************************
// DataBase implementation (Public)
// *************************************************************************
/**
* Function to print the Cluster object into a string in XML format
* @param xml the resulting XML string
* @return a reference to the generated string
*/
string& to_xml(string& xml) const;
/**
* Rebuilds the object from an xml formatted string
* @param xml_str The xml-formatted string
*
* @return 0 on success, -1 otherwise
*/
int from_xml(const string &xml_str);
private:
// -------------------------------------------------------------------------
// Friends
// -------------------------------------------------------------------------
friend class ClusterPool;
// *************************************************************************
// Constructor
// *************************************************************************
Cluster(int id, const string& name):
PoolObjectSQL(id,CLUSTER,name,-1,-1,"","",table),
hosts("HOSTS"),
datastores("DATASTORES"),
vnets("VNETS"){};
virtual ~Cluster(){};
// *************************************************************************
// Object Collections (Private)
// *************************************************************************
ObjectCollection hosts;
ObjectCollection datastores;
ObjectCollection vnets;
// *************************************************************************
// DataBase implementation (Private)
// *************************************************************************
static const char * db_names;
static const char * db_bootstrap;
static const char * table;
/**
* 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);
/**
* Bootstraps the database table(s) associated to the Cluster
* @return 0 on success
*/
static int bootstrap(SqlDB * db)
{
ostringstream oss(Cluster::db_bootstrap);
return db->exec(oss);
};
/**
* Writes the Cluster 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 Cluster's data 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);
}
/**
* Checks if all the collections are empty, and therefore this cluster
* can be dropped.
*
* @param error_msg Error message, if any.
* @return 0 if cluster can be dropped, -1 otherwise
*/
int check_drop(string& error_msg);
};
#endif /*CLUSTER_H_*/
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