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one/include/QuotaDatastore.h
2013-01-24 16:18:30 +01:00

86 lines
3.0 KiB
C++

/* -------------------------------------------------------------------------- */
/* Copyright 2002-2013, OpenNebula Project (OpenNebula.org), C12G Labs */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); you may */
/* not use this file except in compliance with the License. You may obtain */
/* a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
/* See the License for the specific language governing permissions and */
/* limitations under the License. */
/* -------------------------------------------------------------------------- */
#ifndef QUOTA_DATASTORE_H_
#define QUOTA_DATASTORE_H_
#include "Quota.h"
/**
* DataStore Quotas, defined as:
* DATASTORE = [
* ID = <ID of the datastore>
* IMAGES = <Max. number of images allowed in the datastore>
* SIZE = <Max. number of MB used in the datastore>
* IMAGES_USED = Current number of images in the datastore
* SIZE_USED = Current storage capacity un the datastore
* ]
*
* 0 = unlimited, default if missing
*/
class QuotaDatastore : public Quota
{
public:
QuotaDatastore(bool is_default):
Quota("DATASTORE_QUOTA",
"DATASTORE",
DS_METRICS,
NUM_DS_METRICS,
is_default)
{};
~QuotaDatastore(){};
/**
* Check if the resource allocation will exceed the quota limits. If not
* the usage counters are updated
* @param tmpl template for the resource
* @param default_quotas Quotas that contain the default limits
* @param error string
* @return true if the operation can be performed
*/
bool check(Template* tmpl, Quotas& default_quotas, string& error);
/**
* Decrement usage counters when deallocating image
* @param tmpl template for the resource
*/
void del(Template* tmpl);
protected:
/**
* Gets the default quota identified by its ID.
*
* @param id of the quota
* @param default_quotas Quotas that contain the default limits
* @param va The quota, if it is found
*
* @return 0 on success, -1 if not found
*/
int get_default_quota(const string& id,
Quotas& default_quotas,
VectorAttribute **va);
static const char * DS_METRICS[];
static const int NUM_DS_METRICS;
};
#endif /*QUOTA_DATASTORE_H_*/