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// record_store_v1_capped.h
/**
* Copyright (C) 2014 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include "mongo/db/record_id.h"
namespace mongo {
class OperationContext;
class RecordData;
/**
* When a capped collection is modified (delete/insert/etc) then certain notifications need to
* be made, which this (pure virtual) interface exposes.
*/
class CappedCallback {
public:
virtual ~CappedCallback() {}
/**
* This will be called right before loc is deleted when wrapping.
* If data is unowned, it is only valid inside of this call. If implementations wish to
* stash a pointer, they must copy it.
*/
virtual Status aboutToDeleteCapped(OperationContext* txn,
const RecordId& loc,
RecordData data) = 0;
/**
* Used to notify any waiters when new documents may be visible in the capped collection.
*/
virtual void notifyCappedWaitersIfNeeded() = 0;
};
}
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