mirror of https://gitee.com/bigwinds/arangodb
116 lines
4.1 KiB
C++
116 lines
4.1 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 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 "AqlTransaction.h"
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#include "Logger/Logger.h"
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#include "StorageEngine/TransactionCollection.h"
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#include "StorageEngine/TransactionState.h"
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#include "Utils/CollectionNameResolver.h"
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#include "VocBase/LogicalCollection.h"
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#ifdef USE_ENTERPRISE
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#include "Enterprise/Transaction/IgnoreNoAccessAqlTransaction.h"
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#endif
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using namespace arangodb;
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using namespace arangodb::aql;
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AqlTransaction* AqlTransaction::create(
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std::shared_ptr<transaction::Context> const& transactionContext,
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std::map<std::string, aql::Collection*> const* collections,
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transaction::Options const& options, bool isMainTransaction,
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std::unordered_set<std::string> inaccessibleCollections) {
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#ifdef USE_ENTERPRISE
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if (options.skipInaccessibleCollections) {
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return new transaction::IgnoreNoAccessAqlTransaction(
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transactionContext, collections, options, isMainTransaction,
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inaccessibleCollections);
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}
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#endif
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return new AqlTransaction(transactionContext, collections, options,
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isMainTransaction);
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}
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/// @brief clone, used to make daughter transactions for parts of a
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/// distributed AQL query running on the coordinator
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transaction::Methods* AqlTransaction::clone(
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transaction::Options const& options) const {
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auto ctx = transaction::StandaloneContext::Create(vocbase());
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return new AqlTransaction(ctx, &_collections, options, false);
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}
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/// @brief add a collection to the transaction
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Result AqlTransaction::processCollection(aql::Collection* collection) {
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if (ServerState::instance()->isCoordinator()) {
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return processCollectionCoordinator(collection);
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}
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return processCollectionNormal(collection);
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}
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/// @brief add a coordinator collection to the transaction
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Result AqlTransaction::processCollectionCoordinator(
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aql::Collection* collection) {
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TRI_voc_cid_t cid = resolver()->getCollectionId(collection->name());
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return addCollection(cid, collection->name(), collection->accessType());
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}
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/// @brief add a regular collection to the transaction
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Result AqlTransaction::processCollectionNormal(aql::Collection* collection) {
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TRI_voc_cid_t cid = 0;
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auto col = resolver()->getCollectionStruct(collection->name());
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if (col != nullptr) {
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cid = col->id();
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} else {
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cid = resolver()->getCollectionId(collection->name());
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}
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Result res =
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addCollection(cid, collection->name(), collection->accessType());
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if (res.ok() && col != nullptr) {
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collection->setCollection(col.get());
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}
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return res;
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}
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LogicalCollection* AqlTransaction::documentCollection(TRI_voc_cid_t cid) {
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TransactionCollection* trxColl = this->trxCollection(cid);
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TRI_ASSERT(trxColl != nullptr);
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return trxColl->collection();
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}
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/// @brief lockCollections, this is needed in a corner case in AQL: we need
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/// to lock all shards in a controlled way when we set up a distributed
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/// execution engine. To this end, we prevent the standard mechanism to
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/// lock collections on the DBservers when we instantiate the query. Then,
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/// in a second round, we need to lock the shards in exactly the right
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/// order via an HTTP call. This method is used to implement that HTTP action.
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int AqlTransaction::lockCollections() { return state()->lockCollections(); }
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