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141 lines
4.5 KiB
C++
141 lines
4.5 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 <string>
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#include <sstream>
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#include <map>
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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
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{
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public:
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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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private:
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// -------------------------------------------------------------------------
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// Friends
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// -------------------------------------------------------------------------
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friend class HostPool;
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/* ---------------------------------------------------------------------- */
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/* Attributes */
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/* ---------------------------------------------------------------------- */
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/**
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* This map stores the clusters
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*/
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map<int, string> cluster_names;
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/* ---------------------------------------------------------------------- */
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/* Methods for cluster management */
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/* ---------------------------------------------------------------------- */
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/**
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* Returns true if the clid is an id for an existing cluster
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* @param clid ID of the cluster
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*
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* @return true if the clid is an id for an existing cluster
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*/
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bool exists(int clid)
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{
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return cluster_names.count(clid) > 0;
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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 * clid, string name, SqlDB *db, string& error_str);
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/**
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* Returns the xml representation of the given cluster
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* @param clid ID of the cluster
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*
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* @return the xml representation of the given cluster
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*/
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string info(int clid);
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/**
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* Removes the given cluster from the pool and the DB
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* @param clid ID of the cluster
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*
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* @return 0 on success
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*/
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int drop(int clid, SqlDB *db);
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/**
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* Dumps the cluster pool in XML format.
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* @param oss the output stream to dump the pool contents
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*
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* @return 0 on success
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*/
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int dump(ostringstream& oss);
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/**
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* Bootstraps the database table(s) associated to the Cluster
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*/
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static void bootstrap(SqlDB * db)
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{
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ostringstream oss(ClusterPool::db_bootstrap);
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db->exec(oss);
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};
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/**
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* Function to insert new Cluster in the pool
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* @param oid the id assigned to the Cluster
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* @param name the Cluster's name
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* @return 0 on success, -1 in case of failure
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*/
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int insert (int oid, string name, SqlDB *db);
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/**
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* Formats as XML the given id and name.
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* @param oss the output stream to dump the pool contents
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*
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* @return 0 on success
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*/
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void dump_cluster(ostringstream& oss, int id, string name);
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/* ---------------------------------------------------------------------- */
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/* DB manipulation */
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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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#endif /*CLUSTER_POOL_H_*/
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