mirror of https://gitee.com/bigwinds/arangodb
137 lines
4.2 KiB
C++
137 lines
4.2 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2017 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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////////////////////////////////////////////////////////////////////////////////
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#include "RocksDBIndex.h"
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#include "Basics/VelocyPackHelper.h"
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#include "Cache/CacheManagerFeature.h"
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#include "Cache/Common.h"
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#include "Cache/Manager.h"
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#include "RocksDBEngine/RocksDBComparator.h"
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#include "RocksDBEngine/RocksDBEngine.h"
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#include "StorageEngine/EngineSelectorFeature.h"
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#include "VocBase/LogicalCollection.h"
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#include "VocBase/ticks.h"
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using namespace arangodb;
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RocksDBIndex::RocksDBIndex(
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TRI_idx_iid_t id, LogicalCollection* collection,
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std::vector<std::vector<arangodb::basics::AttributeName>> const& attributes,
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bool unique, bool sparse, uint64_t objectId)
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: Index(id, collection, attributes, unique, sparse),
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_objectId((objectId != 0) ? objectId : TRI_NewTickServer()),
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_cmp(static_cast<RocksDBEngine*>(EngineSelectorFeature::ENGINE)->cmp()),
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_cache(nullptr),
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_cachePresent(false),
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_useCache(false) {}
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RocksDBIndex::RocksDBIndex(TRI_idx_iid_t id, LogicalCollection* collection,
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VPackSlice const& info)
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: Index(id, collection, info),
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_objectId(basics::VelocyPackHelper::stringUInt64(info.get("objectId"))),
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_cmp(static_cast<RocksDBEngine*>(EngineSelectorFeature::ENGINE)->cmp()),
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_cache(nullptr),
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_cachePresent(false),
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_useCache(false) {
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if (_objectId == 0) {
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_objectId = TRI_NewTickServer();
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}
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}
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RocksDBIndex::~RocksDBIndex() {
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if (_useCache && _cachePresent) {
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try {
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TRI_ASSERT(_cache != nullptr);
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TRI_ASSERT(CacheManagerFeature::MANAGER != nullptr);
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CacheManagerFeature::MANAGER->destroyCache(_cache);
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} catch (...) {
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}
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}
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}
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void RocksDBIndex::load() {
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if (_useCache) {
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createCache();
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}
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}
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int RocksDBIndex::unload() {
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if (_useCache && _cachePresent) {
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disableCache();
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TRI_ASSERT(!_cachePresent);
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}
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return TRI_ERROR_NO_ERROR;
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}
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/// @brief return a VelocyPack representation of the index
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void RocksDBIndex::toVelocyPack(VPackBuilder& builder, bool withFigures,
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bool forPersistence) const {
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Index::toVelocyPack(builder, withFigures, forPersistence);
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if (forPersistence) {
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builder.add("objectId", VPackValue(std::to_string(_objectId)));
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}
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}
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void RocksDBIndex::createCache() {
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if (!_useCache || _cachePresent) {
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// we should not get here if we do not need the cache
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// or if cache already created
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return;
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}
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TRI_ASSERT(_cache.get() == nullptr);
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TRI_ASSERT(CacheManagerFeature::MANAGER != nullptr);
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_cache = CacheManagerFeature::MANAGER->createCache(cache::CacheType::Transactional);
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_cachePresent = (_cache.get() != nullptr);
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}
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void RocksDBIndex::disableCache() {
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if (!_cachePresent) {
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return;
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}
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TRI_ASSERT(CacheManagerFeature::MANAGER != nullptr);
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// must have a cache...
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TRI_ASSERT(_useCache);
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TRI_ASSERT(_cachePresent);
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TRI_ASSERT(_cache.get() != nullptr);
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CacheManagerFeature::MANAGER->destroyCache(_cache);
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_cache.reset();
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_cachePresent = false;
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}
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int RocksDBIndex::drop() {
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// Try to drop the cache as well.
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if (_cachePresent) {
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try {
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TRI_ASSERT(_cachePresent);
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TRI_ASSERT(CacheManagerFeature::MANAGER != nullptr);
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CacheManagerFeature::MANAGER->destroyCache(_cache);
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// Reset flag
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_cache.reset();
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_cachePresent = false;
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} catch (...) {
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}
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}
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return TRI_ERROR_NO_ERROR;
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}
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