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140 lines
4.4 KiB
C++
140 lines
4.4 KiB
C++
/* -------------------------------------------------------------------------- */
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/* Copyright 2002-2010, 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 CLUSTER_POOL_H_
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#define CLUSTER_POOL_H_
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#include "Cluster.h"
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#include "Host.h"
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#include "SqlDB.h"
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using namespace std;
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/**
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* A cluster helper class. It is not a normal PoolSQL,
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* but a series of static methods related to clusters.
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*/
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class ClusterPool : public PoolSQL
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{
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public:
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ClusterPool(SqlDB * db);
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~ClusterPool(){};
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/**
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* Removes the host from the given cluster setting the default one.
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* @param host The host to assign
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*
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* @return 0 on success
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*/
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int set_default_cluster(Host * host)
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{
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return host->set_cluster(ClusterPool::DEFAULT_CLUSTER_NAME);
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};
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/**
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* Cluster name for the default cluster
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*/
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static const string DEFAULT_CLUSTER_NAME;
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/* ---------------------------------------------------------------------- */
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/* Methods for DB management */
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/* ---------------------------------------------------------------------- */
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/**
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* Allocates a new cluster in the pool
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* @param clid the id assigned to the cluster
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* @return the id assigned to the cluster or -1 in case of failure
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*/
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int allocate(int * oid, string name, string& error_str);
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/**
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* Function to get a Cluster 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 Cluster unique id
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* @param lock locks the Cluster mutex
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* @return a pointer to the Cluster, 0 if the Cluster could not be loaded
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*/
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Cluster * get(int oid, bool lock)
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{
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return static_cast<Cluster *>(PoolSQL::get(oid,lock));
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};
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/**
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* Gets an object from the pool (if needed the object is loaded from the
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* database).
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* @param name of the object
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* @param lock locks the object if true
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*
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* @return a pointer to the object, 0 in case of failure
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*/
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Cluster * get(const string& name, bool lock)
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{
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return static_cast<Cluster *>(PoolSQL::get(name,-1,lock));
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};
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/** Update a particular Cluster
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* @param user pointer to Cluster
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* @return 0 on success
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*/
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int update(Cluster * cluster)
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{
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return cluster->update(db);
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};
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/**
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* Drops the Cluster from the data base. The object mutex SHOULD be
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* locked.
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* @param cluster a pointer to the object
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* @return 0 on success.
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*/
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int drop(Cluster * cluster);
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/**
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* Bootstraps the database table(s) associated to the Cluster pool
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*/
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static void bootstrap(SqlDB * _db)
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{
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Cluster::bootstrap(_db);
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};
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/**
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* Dumps the Cluster pool in XML format. A filter can be also added to the
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* query
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* @param oss the output stream to dump the pool contents
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* @param where filter for the objects, defaults to all
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*
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* @return 0 on success
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*/
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int dump(ostringstream& oss, const string& where)
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{
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return PoolSQL::dump(oss, "CLUSTER_POOL", Cluster::table, where);
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};
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private:
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/**
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* Factory method to produce objects
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* @return a pointer to the new object
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*/
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PoolObjectSQL * create()
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{
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return new Cluster(-1,"");
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};
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};
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#endif /*CLUSTER_POOL_H_*/
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