mirror of https://gitee.com/bigwinds/arangodb
206 lines
7.4 KiB
C++
206 lines
7.4 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 "RocksDBPrimaryIndex.h"
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#include "Aql/AstNode.h"
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#include "Basics/Exceptions.h"
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#include "Basics/StaticStrings.h"
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#include "Indexes/SimpleAttributeEqualityMatcher.h"
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#include "Transaction/Helpers.h"
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#include "Transaction/Methods.h"
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#include "Transaction/Context.h"
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#include "VocBase/LogicalCollection.h"
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#include <velocypack/Builder.h>
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#include <velocypack/Collection.h>
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#include <velocypack/Slice.h>
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#include <velocypack/velocypack-aliases.h>
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using namespace arangodb;
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/// @brief hard-coded vector of the index attributes
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/// note that the attribute names must be hard-coded here to avoid an init-order
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/// fiasco with StaticStrings::FromString etc.
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static std::vector<std::vector<arangodb::basics::AttributeName>> const IndexAttributes
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{{arangodb::basics::AttributeName("_id", false)},
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{arangodb::basics::AttributeName("_key", false)}};
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RocksDBPrimaryIndexIterator::RocksDBPrimaryIndexIterator(LogicalCollection* collection,
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transaction::Methods* trx,
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ManagedDocumentResult* mmdr,
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RocksDBPrimaryIndex const* index,
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std::unique_ptr<VPackBuilder>& keys)
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: IndexIterator(collection, trx, mmdr, index),
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_index(index),
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_keys(keys.get()),
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_iterator(_keys->slice()) {
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keys.release(); // now we have ownership for _keys
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TRI_ASSERT(_keys->slice().isArray());
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}
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RocksDBPrimaryIndexIterator::~RocksDBPrimaryIndexIterator() {
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if (_keys != nullptr) {
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// return the VPackBuilder to the transaction context
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_trx->transactionContextPtr()->returnBuilder(_keys.release());
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}
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}
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bool RocksDBPrimaryIndexIterator::next(TokenCallback const& cb, size_t limit) {
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THROW_ARANGO_NOT_YET_IMPLEMENTED();
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return false;
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}
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void RocksDBPrimaryIndexIterator::reset() { _iterator.reset(); }
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RocksDBAllIndexIterator::RocksDBAllIndexIterator(LogicalCollection* collection,
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transaction::Methods* trx,
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ManagedDocumentResult* mmdr,
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RocksDBPrimaryIndex const* index,
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bool reverse)
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: IndexIterator(collection, trx, mmdr, index), _reverse(reverse), _total(0) {}
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bool RocksDBAllIndexIterator::next(TokenCallback const& cb, size_t limit) {
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// TODO
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return false;
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}
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void RocksDBAllIndexIterator::reset() {
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// TODO
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}
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RocksDBAnyIndexIterator::RocksDBAnyIndexIterator(LogicalCollection* collection, transaction::Methods* trx,
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ManagedDocumentResult* mmdr,
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RocksDBPrimaryIndex const* index)
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: IndexIterator(collection, trx, mmdr, index) {}
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bool RocksDBAnyIndexIterator::next(TokenCallback const& cb, size_t limit) {
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THROW_ARANGO_NOT_YET_IMPLEMENTED();
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return true;
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}
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void RocksDBAnyIndexIterator::reset() {
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THROW_ARANGO_NOT_YET_IMPLEMENTED();
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}
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RocksDBPrimaryIndex::RocksDBPrimaryIndex(arangodb::LogicalCollection* collection)
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: Index(0, collection,
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std::vector<std::vector<arangodb::basics::AttributeName>>(
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{{arangodb::basics::AttributeName(StaticStrings::KeyString, false)}}),
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true, false) {
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}
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RocksDBPrimaryIndex::~RocksDBPrimaryIndex() {}
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/// @brief return the number of documents from the index
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size_t RocksDBPrimaryIndex::size() const {
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// TODO
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return 0;
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}
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/// @brief return the memory usage of the index
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size_t RocksDBPrimaryIndex::memory() const {
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return 0; // TODO
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}
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/// @brief return a VelocyPack representation of the index
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void RocksDBPrimaryIndex::toVelocyPack(VPackBuilder& builder, bool withFigures) const {
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Index::toVelocyPack(builder, withFigures);
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// hard-coded
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builder.add("unique", VPackValue(true));
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builder.add("sparse", VPackValue(false));
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}
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/// @brief return a VelocyPack representation of the index figures
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void RocksDBPrimaryIndex::toVelocyPackFigures(VPackBuilder& builder) const {
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Index::toVelocyPackFigures(builder);
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// TODO: implement
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}
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int RocksDBPrimaryIndex::insert(transaction::Methods*, TRI_voc_rid_t, VPackSlice const&, bool) {
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#ifdef ARANGODB_ENABLE_MAINTAINER_MODE
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LOG_TOPIC(WARN, arangodb::Logger::FIXME) << "insert() called for primary index";
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#endif
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THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_INTERNAL, "insert() called for primary index");
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}
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int RocksDBPrimaryIndex::remove(transaction::Methods*, TRI_voc_rid_t, VPackSlice const&, bool) {
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#ifdef ARANGODB_ENABLE_MAINTAINER_MODE
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LOG_TOPIC(WARN, arangodb::Logger::FIXME) << "remove() called for primary index";
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#endif
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THROW_ARANGO_EXCEPTION_MESSAGE(TRI_ERROR_INTERNAL, "remove() called for primary index");
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}
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/// @brief unload the index data from memory
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int RocksDBPrimaryIndex::unload() {
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// nothing to do
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return TRI_ERROR_NO_ERROR;
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}
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/// @brief checks whether the index supports the condition
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bool RocksDBPrimaryIndex::supportsFilterCondition(
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arangodb::aql::AstNode const* node,
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arangodb::aql::Variable const* reference, size_t itemsInIndex,
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size_t& estimatedItems, double& estimatedCost) const {
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SimpleAttributeEqualityMatcher matcher(IndexAttributes);
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return matcher.matchOne(this, node, reference, itemsInIndex, estimatedItems,
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estimatedCost);
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}
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/// @brief creates an IndexIterator for the given Condition
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IndexIterator* RocksDBPrimaryIndex::iteratorForCondition(
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transaction::Methods* trx,
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ManagedDocumentResult* mmdr,
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arangodb::aql::AstNode const* node,
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arangodb::aql::Variable const* reference, bool reverse) const {
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THROW_ARANGO_NOT_YET_IMPLEMENTED();
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return nullptr;
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}
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/// @brief specializes the condition for use with the index
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arangodb::aql::AstNode* RocksDBPrimaryIndex::specializeCondition(
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arangodb::aql::AstNode* node,
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arangodb::aql::Variable const* reference) const {
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SimpleAttributeEqualityMatcher matcher(IndexAttributes);
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return matcher.specializeOne(this, node, reference);
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}
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/// @brief request an iterator over all elements in the index in
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/// a sequential order.
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IndexIterator* RocksDBPrimaryIndex::allIterator(transaction::Methods* trx,
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ManagedDocumentResult* mmdr,
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bool reverse) const {
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return new RocksDBAllIndexIterator(_collection, trx, mmdr, this, reverse);
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}
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/// @brief request an iterator over all elements in the index in
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/// a random order. It is guaranteed that each element is found
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/// exactly once unless the collection is modified.
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IndexIterator* RocksDBPrimaryIndex::anyIterator(transaction::Methods* trx,
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ManagedDocumentResult* mmdr) const {
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return new RocksDBAnyIndexIterator(_collection, trx, mmdr, this);
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}
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