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134 lines
4.1 KiB
C++
134 lines
4.1 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_MACHINE_POOL_H_
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#define VIRTUAL_MACHINE_POOL_H_
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#include "PoolSQL.h"
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#include "VirtualMachine.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 Machine Pool class. ...
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*/
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class VirtualMachinePool : public PoolSQL
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{
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public:
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VirtualMachinePool(SqliteDB * db):PoolSQL(db,VirtualMachine::table){};
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~VirtualMachinePool(){};
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/**
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* Function to allocate a new VM object
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* @param uid user id (the owner of the VM)
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* @param stemplate a string describing the VM
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* @param oid the id assigned to the VM (output)
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* @param on_hold flag to submit on hold
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* @return 0 on success, -1 error inserting in DB or -2 error parsing
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* the 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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bool on_hold = false);
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/**
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* Function to get a VM from the pool, if the object is not in memory
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* it is loade from the DB
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* @param oid VM unique id
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* @param lock locks the VM mutex
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* @return a pointer to the VM, 0 if the VM could not be loaded
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*/
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VirtualMachine * get(
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int oid,
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bool lock)
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{
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return static_cast<VirtualMachine *>(PoolSQL::get(oid,lock));
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};
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/**
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* Function to get the IDs of running VMs
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* @param oids a vector that contains the IDs
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* @return 0 on success
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*/
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int get_running(
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vector<int>& oids);
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/**
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* Function to get the IDs of pending VMs
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* @param oids a vector that contains the IDs
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* @return 0 on success
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*/
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int get_pending(
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vector<int>& oids);
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//--------------------------------------------------------------------------
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// Virtual Machine DB access functions
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//--------------------------------------------------------------------------
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/**
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* Updates the history record of a VM, the lock of the vm SHOULD be locked
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* @param vm pointer to the virtual machine object
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* @return 0 on success
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*/
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int update_history(
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VirtualMachine * vm)
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{
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return vm->update_history(db);
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}
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/**
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* Get the ID of the previous host
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* @param vm pointer to the virtual machine object
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* @param hid the ID of the host
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* @return 0 on success
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*/
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int get_previous_hid(
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VirtualMachine * vm,
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int * hid)
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{
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return vm->get_previous_hid(db,hid);
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};
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/**
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* Bootstraps the database table(s) associated to the VirtualMachine pool
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*/
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void bootstrap()
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{
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VirtualMachine::bootstrap(db);
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};
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private:
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/**
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* Factory method to produce VM objects
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* @return a pointer to the new VM
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*/
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PoolObjectSQL * create()
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{
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return new VirtualMachine;
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};
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};
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#endif /*VIRTUAL_MACHINE_POOL_H_*/
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