mirror of https://gitee.com/bigwinds/arangodb
100 lines
3.3 KiB
C++
100 lines
3.3 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 Simon Grätzer
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////////////////////////////////////////////////////////////////////////////////
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#include "WalAccess.h"
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#include "Basics/ScopeGuard.h"
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#include "Replication/common-defines.h"
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#include "RestServer/DatabaseFeature.h"
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#include "VocBase/LogicalCollection.h"
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using namespace arangodb;
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/// @brief check if db should be handled, might already be deleted
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bool WalAccessContext::shouldHandleDB(TRI_voc_tick_t dbid) const {
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return _filter.vocbase == 0 || _filter.vocbase == dbid;
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}
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/// @brief check if view should be handled, might already be deleted
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bool WalAccessContext::shouldHandleView(TRI_voc_tick_t dbid, TRI_voc_cid_t vid) const {
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if (dbid == 0 || vid == 0 || !shouldHandleDB(dbid)) {
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return false;
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}
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if (_filter.vocbase == 0 ||
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(_filter.vocbase == dbid && (_filter.collection == 0 || _filter.collection == vid))) {
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return true;
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}
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return false;
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}
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/// @brief Check if collection is in filter, will load collection
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bool WalAccessContext::shouldHandleCollection(TRI_voc_tick_t dbid, TRI_voc_cid_t cid) {
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if (dbid == 0 || cid == 0 || !shouldHandleDB(dbid)) {
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return false;
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}
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if (_filter.vocbase == 0 ||
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(_filter.vocbase == dbid && (_filter.collection == 0 || _filter.collection == cid))) {
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LogicalCollection* collection = loadCollection(dbid, cid);
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if (collection == nullptr) {
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return false;
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}
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return !TRI_ExcludeCollectionReplication(collection->name(),
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_filter.includeSystem,
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_filter.includeFoxxQueues);
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}
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return false;
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}
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/// @brief try to get collection, may return null
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TRI_vocbase_t* WalAccessContext::loadVocbase(TRI_voc_tick_t dbid) {
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TRI_ASSERT(dbid != 0);
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auto const& it = _vocbases.find(dbid);
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if (it == _vocbases.end()) {
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TRI_vocbase_t* vocbase = DatabaseFeature::DATABASE->useDatabase(dbid);
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if (vocbase != nullptr) {
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TRI_DEFER(vocbase->release());
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_vocbases.try_emplace(dbid, *vocbase);
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}
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return vocbase;
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} else {
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return &(it->second.database());
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}
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}
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LogicalCollection* WalAccessContext::loadCollection(TRI_voc_tick_t dbid, TRI_voc_cid_t cid) {
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TRI_ASSERT(dbid != 0);
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TRI_ASSERT(cid != 0);
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TRI_vocbase_t* vocbase = loadVocbase(dbid);
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if (vocbase != nullptr) {
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try {
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auto it = _collectionCache.try_emplace(cid, CollectionGuard(vocbase, cid)).first;
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return it->second.collection();
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} catch (...) {
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// weglaecheln
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}
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}
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return nullptr;
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}
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