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 2014-2016 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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using namespace arangodb;
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using namespace arangodb::aql;
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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(aql::Collection* collection) {
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TRI_voc_cid_t cid = resolver()->getCollectionId(collection->getName());
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return addCollection(cid, collection->getName().c_str(),
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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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arangodb::LogicalCollection const* col =
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resolver()->getCollectionStruct(collection->getName());
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/*if (col == nullptr) {
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auto startTime = TRI_microtime();
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auto endTime = startTime + 60.0;
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do {
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usleep(10000);
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if (TRI_microtime() > endTime) {
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break;
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}
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col = this->resolver()->getCollectionStruct(collection->getName());
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} while (col == nullptr);
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}
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*/
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if (col != nullptr) {
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cid = col->cid();
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}
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Result res = addCollection(cid, collection->getName(), collection->accessType);
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if (res.ok() && col != nullptr) {
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collection->setCollection(const_cast<arangodb::LogicalCollection*>(col));
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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() {
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return state()->lockCollections();
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}
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