mirror of https://gitee.com/bigwinds/arangodb
159 lines
6.0 KiB
C++
159 lines
6.0 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief list of collection keys dumps present in database
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2014 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain 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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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Jan Steemann
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/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
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/// @author Copyright 2012-2013, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGODB_ARANGO_COLLECTION_KEYS_REPOSITORY_H
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#define ARANGODB_ARANGO_COLLECTION_KEYS_REPOSITORY_H 1
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#include "Basics/Common.h"
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#include "Basics/Mutex.h"
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#include "Utils/CollectionKeys.h"
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#include "VocBase/voc-types.h"
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struct TRI_json_t;
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struct TRI_vocbase_t;
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namespace triagens {
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namespace arango {
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class CollectionKeys;
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// -----------------------------------------------------------------------------
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// --SECTION-- class CollectionKeysRepository
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// -----------------------------------------------------------------------------
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class CollectionKeysRepository {
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// -----------------------------------------------------------------------------
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// --SECTION-- constructors / destructors
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// -----------------------------------------------------------------------------
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public:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief create a collection keys repository
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////////////////////////////////////////////////////////////////////////////////
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explicit CollectionKeysRepository (TRI_vocbase_t*);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief destroy a collection keys repository
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////////////////////////////////////////////////////////////////////////////////
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~CollectionKeysRepository ();
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// -----------------------------------------------------------------------------
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// --SECTION-- public methods
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// -----------------------------------------------------------------------------
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public:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief stores collection keys in the repository
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////////////////////////////////////////////////////////////////////////////////
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void store (CollectionKeys*);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief remove a keys by id
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////////////////////////////////////////////////////////////////////////////////
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bool remove (CollectionKeysId);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief find an existing collection keys list by id
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/// if found, the keys will be returned with the usage flag set to true.
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/// it must be returned later using release()
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////////////////////////////////////////////////////////////////////////////////
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CollectionKeys* find (CollectionKeysId,
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bool&);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief return a cursor
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////////////////////////////////////////////////////////////////////////////////
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void release (CollectionKeys*);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief whether or not the repository contains used keys
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////////////////////////////////////////////////////////////////////////////////
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bool containsUsed ();
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////////////////////////////////////////////////////////////////////////////////
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/// @brief run a garbage collection on the data
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////////////////////////////////////////////////////////////////////////////////
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bool garbageCollect (bool);
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// -----------------------------------------------------------------------------
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// --SECTION-- private variables
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// -----------------------------------------------------------------------------
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private:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief vocbase
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////////////////////////////////////////////////////////////////////////////////
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TRI_vocbase_t* _vocbase;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief mutex for the repository
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////////////////////////////////////////////////////////////////////////////////
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triagens::basics::Mutex _lock;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief list of current keys
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////////////////////////////////////////////////////////////////////////////////
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std::unordered_map<CollectionKeysId, CollectionKeys*> _keys;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief maximum number of keys to garbage-collect in one go
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////////////////////////////////////////////////////////////////////////////////
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static size_t const MaxCollectCount;
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};
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}
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}
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#endif
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// -----------------------------------------------------------------------------
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// --SECTION-- END-OF-FILE
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// -----------------------------------------------------------------------------
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// Local Variables:
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// mode: outline-minor
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// outline-regexp: "/// @brief\\|/// {@inheritDoc}\\|/// @page\\|// --SECTION--\\|/// @\\}"
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// End:
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