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145 lines
4.5 KiB
C++
145 lines
4.5 KiB
C++
/* -------------------------------------------------------------------------- */
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/* Copyright 2002-2008, Distributed Systems Architecture Group, Universidad */
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/* Complutense de Madrid (dsa-research.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 VIRTUAL_NETWORK_POOL_H_
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#define VIRTUAL_NETWORK_POOL_H_
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#include "PoolSQL.h"
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#include "VirtualNetwork.h"
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#include <time.h>
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using namespace std;
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/**
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* The Virtual Network Pool class. ...
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*/
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class VirtualNetworkPool : public PoolSQL
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{
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public:
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VirtualNetworkPool(SqliteDB * db,
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const string& str_mac_prefix,
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int default_size);
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~VirtualNetworkPool(){};
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/**
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* Function to allocate a new VN object
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* @param uid user identifier
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* @param stemplate a string describing the VN
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* @param oid the id assigned to the VM (output)
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* @return 0 on success, -1 error inserting in DB,-2 error parsing
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* the template, -3 wrong attributes in template
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*/
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int allocate (
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int uid,
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const string& stemplate,
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int * oid);
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/**
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* Function to get a VN from the pool, if the object is not in memory
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* it is loaded from the DB
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* @param oid VN unique id
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* @param lock locks the VN mutex
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* @return a pointer to the VN, 0 if the VN could not be loaded
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*/
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VirtualNetwork * get(
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int oid,
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bool lock)
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{
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return static_cast<VirtualNetwork *>(PoolSQL::get(oid,lock));
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};
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/**
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* Function to get a VN from the pool using the network name
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* If the object is not in memory it is loaded from the DB
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* @param name VN unique name
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* @param lock locks the VN mutex
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* @return a pointer to the VN, 0 if the VN could not be loaded
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*/
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VirtualNetwork * get(
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const string& name,
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bool lock);
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//--------------------------------------------------------------------------
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// Virtual Network DB access functions
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//--------------------------------------------------------------------------
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/**
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* Updates the template of a VN, adding a new attribute (replacing it if
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* already defined), the VN's mutex SHOULD be locked
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* @param vn pointer to the virtual network object
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* @param name of the new attribute
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* @param value of the new attribute
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* @return 0 on success
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*/
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int update_template_attribute(
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VirtualNetwork * vn,
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string& name,
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string& value)
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{
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return vn->update_template_attribute(db,name,value);
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};
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/**
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* Bootstraps the database table(s) associated to the VirtualNetwork pool
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*/
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void bootstrap()
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{
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VirtualNetwork::bootstrap(db);
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};
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/** Drops a VN from the cache & DB, the VN mutex MUST BE locked
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* @param vn pointer to VN
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*/
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int drop(VirtualNetwork * vn)
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{
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int rc = vn->drop(db);
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if ( rc == 0)
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{
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remove(static_cast<PoolObjectSQL *>(vn));
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}
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return rc;
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};
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private:
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/**
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* Factory method to produce VN objects
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* @return a pointer to the new VN
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*/
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PoolObjectSQL * create()
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{
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return new VirtualNetwork(mac_prefix, default_size);
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};
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/**
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* Holds the system-wide MAC prefix
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*/
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unsigned int mac_prefix;
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/**
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* Default size for Virtual Networks
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*/
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unsigned int default_size;
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};
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#endif /*VIRTUAL_NETWORK_POOL_H_*/
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