mirror of
https://github.com/OpenNebula/one.git
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286 lines
8.0 KiB
C++
286 lines
8.0 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 HOST_POOL_H_
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#define HOST_POOL_H_
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#include "PoolSQL.h"
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#include "Host.h"
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#include "ClusterPool.h"
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#include <time.h>
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#include <sstream>
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#include <iostream>
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#include <vector>
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using namespace std;
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/**
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* The Host Pool class.
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*/
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class HostPool : public PoolSQL
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{
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public:
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HostPool(SqlDB * db);
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~HostPool(){};
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/**
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* Function to allocate a new Host object
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* @param oid the id assigned to the Host
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* @return the oid assigned to the object or -1 in case of failure
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*/
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int allocate (
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int * oid,
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const string& hostname,
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const string& im_mad_name,
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const string& vmm_mad_name,
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const string& tm_mad_name,
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string& error_str);
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/**
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* Function to get a Host 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 Host unique id
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* @param lock locks the Host mutex
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* @return a pointer to the Host, 0 if the Host could not be loaded
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*/
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Host * get(
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int oid,
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bool lock)
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{
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return static_cast<Host *>(PoolSQL::get(oid,lock));
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};
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/** Update a particular Host
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* @param host pointer to Host
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* @return 0 on success
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*/
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int update(Host * host)
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{
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return host->update(db);
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};
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/**
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* Bootstraps the database table(s) associated to the Host pool
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*/
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static void bootstrap(SqlDB *_db)
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{
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Host::bootstrap(_db);
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ClusterPool::bootstrap(_db);
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};
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/**
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* Get the least monitored hosts
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* @param discovered hosts, map to store the retrieved hosts hids and
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* hostnames
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* @param host_limit max. number of hosts to monitor at a time
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* @return int 0 if success
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*/
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int discover(map<int, string> * discovered_hosts, int host_limit);
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/**
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* Allocates a given capacity to the host
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* @param oid the id of the host to allocate the capacity
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* @param cpu amount of CPU
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* @param mem amount of main memory
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* @param disk amount of disk
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*/
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void add_capacity(int oid,int cpu, int mem, int disk)
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{
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Host * host = get(oid, true);
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if ( host != 0 )
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{
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host->add_capacity(cpu, mem, disk);
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update(host);
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host->unlock();
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}
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};
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/**
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* De-Allocates a given capacity to the host
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* @param oid the id of the host to allocate the capacity
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* @param cpu amount of CPU
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* @param mem amount of main memory
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* @param disk amount of disk
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*/
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void del_capacity(int oid,int cpu, int mem, int disk)
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{
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Host * host = get(oid, true);
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if ( host != 0 )
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{
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host->del_capacity(cpu, mem, disk);
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update(host);
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host->unlock();
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}
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};
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/**
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* Dumps the HOST 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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/* ---------------------------------------------------------------------- */
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/* Methods for cluster management */
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/* ---------------------------------------------------------------------- */
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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_cluster(int clid)
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{
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return cluster_pool.exists(clid);
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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_cluster(int * clid, const string& name, string& error_str)
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{
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return cluster_pool.allocate(clid, name, db, error_str);
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};
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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_cluster(int clid)
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{
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return cluster_pool.info(clid);
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};
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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_cluster(int clid);
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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_cluster(ostringstream& oss)
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{
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return cluster_pool.dump(oss);
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};
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/**
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* Assigns the host to the given cluster
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* @param host The host to assign
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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 set_cluster(Host* host, int clid)
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{
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map<int, string>::iterator it;
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it = cluster_pool.cluster_names.find(clid);
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if (it == cluster_pool.cluster_names.end())
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{
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return -1;
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}
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return host->set_cluster( it->second );
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};
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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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private:
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/**
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* ClusterPool, clusters defined and persistance functionality
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*/
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ClusterPool cluster_pool;
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/**
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* Factory method to produce Host objects
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* @return a pointer to the new Host
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*/
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PoolObjectSQL * create()
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{
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return new Host;
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};
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/**
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* Callback function to build the cluster pool
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* @param num the number of columns read from the DB
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* @param names the column names
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* @param vaues the column values
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* @return 0 on success
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*/
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int init_cb(void *nil, int num, char **values, char **names);
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/**
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* Callback function to get the IDs of the hosts to be monitored
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* (Host::discover)
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* @param num the number of columns read from the DB
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* @param names the column names
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* @param vaues the column values
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* @return 0 on success
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*/
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int discover_cb(void * _map, int num, char **values, char **names);
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/**
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* Callback function to get output the host pool in XML format
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* (Host::dump)
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* @param num the number of columns read from the DB
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* @param names the column names
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* @param vaues the column values
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* @return 0 on success
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*/
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int dump_cb(void * _oss, int num, char **values, char **names);
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};
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#endif /*HOST_POOL_H_*/
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