mirror of https://gitee.com/bigwinds/arangodb
287 lines
12 KiB
C++
287 lines
12 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 Max Neunhoeffer
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGOD_CLUSTER_CLUSTER_METHODS_H
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#define ARANGOD_CLUSTER_CLUSTER_METHODS_H 1
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#include "Basics/Common.h"
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#include "Basics/StringRef.h"
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#include <velocypack/Slice.h>
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#include <velocypack/velocypack-aliases.h>
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#include "Agency/AgencyComm.h"
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#include "Cluster/TraverserEngineRegistry.h"
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#include "Rest/HttpResponse.h"
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#include "VocBase/LogicalCollection.h"
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#include "VocBase/voc-types.h"
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namespace arangodb {
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namespace velocypack {
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template <typename T>
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class Buffer;
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class Builder;
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class Slice;
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}
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struct OperationOptions;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief creates a copy of all HTTP headers to forward
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////////////////////////////////////////////////////////////////////////////////
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std::unordered_map<std::string, std::string> getForwardableRequestHeaders(
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GeneralRequest*);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief check if a list of attributes have the same values in two vpack
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/// documents
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////////////////////////////////////////////////////////////////////////////////
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bool shardKeysChanged(std::string const& dbname, std::string const& collname,
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VPackSlice const& oldValue, VPackSlice const& newValue,
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bool isPatch);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief returns revision for a sharded collection
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////////////////////////////////////////////////////////////////////////////////
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int revisionOnCoordinator(std::string const& dbname,
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std::string const& collname, TRI_voc_rid_t&);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Warmup index caches on Shards
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////////////////////////////////////////////////////////////////////////////////
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int warmupOnCoordinator(std::string const& dbname,
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std::string const& cid);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief returns figures for a sharded collection
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////////////////////////////////////////////////////////////////////////////////
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int figuresOnCoordinator(std::string const& dbname, std::string const& collname,
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std::shared_ptr<arangodb::velocypack::Builder>&);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief counts number of documents in a coordinator, by shard
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////////////////////////////////////////////////////////////////////////////////
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int countOnCoordinator(std::string const& dbname, std::string const& collname,
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std::vector<std::pair<std::string, uint64_t>>& result,
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bool sendNoLockHeader);
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int selectivityEstimatesOnCoordinator(std::string const& dbname, std::string const& collname,
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std::unordered_map<std::string, double>& result);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief creates a document in a coordinator
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////////////////////////////////////////////////////////////////////////////////
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int createDocumentOnCoordinator(
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std::string const& dbname, std::string const& collname,
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OperationOptions const& options, arangodb::velocypack::Slice const& slice,
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arangodb::rest::ResponseCode& responseCode,
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std::unordered_map<int, size_t>& errorCounters,
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std::shared_ptr<arangodb::velocypack::Builder>& resultBody);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief delete a document in a coordinator
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////////////////////////////////////////////////////////////////////////////////
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int deleteDocumentOnCoordinator(
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std::string const& dbname, std::string const& collname,
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VPackSlice const slice, OperationOptions const& options,
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arangodb::rest::ResponseCode& responseCode,
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std::unordered_map<int, size_t>& errorCounters,
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std::shared_ptr<arangodb::velocypack::Builder>& resultBody);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief get a document in a coordinator
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////////////////////////////////////////////////////////////////////////////////
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int getDocumentOnCoordinator(
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std::string const& dbname, std::string const& collname,
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VPackSlice const slice, OperationOptions const& options,
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std::unique_ptr<std::unordered_map<std::string, std::string>>& headers,
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arangodb::rest::ResponseCode& responseCode,
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std::unordered_map<int, size_t>& errorCounter,
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std::shared_ptr<arangodb::velocypack::Builder>& resultBody);
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/// @brief fetch edges from TraverserEngines
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/// Contacts all TraverserEngines placed
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/// on the DBServers for the given list
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/// of vertex _id's.
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/// All non-empty and non-cached results
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/// of DBServers will be inserted in the
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/// datalake. Slices used in the result
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/// point to content inside of this lake
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/// only and do not run out of scope unless
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/// the lake is cleared.
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/// TraversalVariant
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int fetchEdgesFromEngines(
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std::string const&,
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std::unordered_map<ServerID, traverser::TraverserEngineID> const*,
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arangodb::velocypack::Slice vertexId, size_t,
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std::unordered_map<StringRef, arangodb::velocypack::Slice>&,
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std::vector<arangodb::velocypack::Slice>&,
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std::vector<std::shared_ptr<arangodb::velocypack::Builder>>&,
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arangodb::velocypack::Builder&, size_t&, size_t&);
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/// @brief fetch edges from TraverserEngines
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/// Contacts all TraverserEngines placed
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/// on the DBServers for the given list
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/// of vertex _id's.
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/// All non-empty and non-cached results
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/// of DBServers will be inserted in the
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/// datalake. Slices used in the result
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/// point to content inside of this lake
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/// only and do not run out of scope unless
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/// the lake is cleared.
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/// ShortestPathVariant
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int fetchEdgesFromEngines(
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std::string const& dbname,
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std::unordered_map<ServerID, traverser::TraverserEngineID> const* engines,
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arangodb::velocypack::Slice vertexId,
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bool backward,
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std::unordered_map<StringRef, arangodb::velocypack::Slice>& cache,
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std::vector<arangodb::velocypack::Slice>& result,
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std::vector<std::shared_ptr<arangodb::velocypack::Builder>>& datalake,
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arangodb::velocypack::Builder& builder, size_t& read);
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/// @brief fetch vertices from TraverserEngines
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/// Contacts all TraverserEngines placed
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/// on the DBServers for the given list
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/// of vertex _id's.
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/// If any server responds with a document
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/// it will be inserted into the result.
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/// If no server responds with a document
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/// a 'null' will be inserted into the result.
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void fetchVerticesFromEngines(
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std::string const&,
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std::unordered_map<ServerID, traverser::TraverserEngineID> const*,
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std::unordered_set<StringRef>&,
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std::unordered_map<StringRef, std::shared_ptr<arangodb::velocypack::Buffer<uint8_t>>>&,
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arangodb::velocypack::Builder&);
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/// @brief fetch vertices from TraverserEngines
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/// Contacts all TraverserEngines placed
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/// on the DBServers for the given list
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/// of vertex _id's.
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/// If any server responds with a document
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/// it will be inserted into the result.
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/// If no server responds with a document
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/// a 'null' will be inserted into the result.
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/// ShortestPath Variant
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void fetchVerticesFromEngines(
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std::string const&,
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std::unordered_map<ServerID, traverser::TraverserEngineID> const*,
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std::unordered_set<StringRef>&,
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std::unordered_map<StringRef, arangodb::velocypack::Slice>& result,
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std::vector<std::shared_ptr<arangodb::velocypack::Builder>>& datalake,
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arangodb::velocypack::Builder&);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief get a filtered set of edges on Coordinator.
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/// Also returns the result in VelocyPack
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////////////////////////////////////////////////////////////////////////////////
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int getFilteredEdgesOnCoordinator(
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std::string const& dbname, std::string const& collname,
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std::string const& vertex, TRI_edge_direction_e const& direction,
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arangodb::rest::ResponseCode& responseCode,
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arangodb::velocypack::Builder& result);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief modify a document in a coordinator
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////////////////////////////////////////////////////////////////////////////////
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int modifyDocumentOnCoordinator(
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std::string const& dbname, std::string const& collname,
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arangodb::velocypack::Slice const& slice, OperationOptions const& options,
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bool isPatch,
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std::unique_ptr<std::unordered_map<std::string, std::string>>& headers,
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arangodb::rest::ResponseCode& responseCode,
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std::unordered_map<int, size_t>& errorCounter,
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std::shared_ptr<arangodb::velocypack::Builder>& resultBody);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief truncate a cluster collection on a coordinator
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////////////////////////////////////////////////////////////////////////////////
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int truncateCollectionOnCoordinator(std::string const& dbname,
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std::string const& collname);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief flush Wal on all DBservers
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////////////////////////////////////////////////////////////////////////////////
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int flushWalOnAllDBServers(bool waitForSync, bool waitForCollector, double maxWaitTime = -1.0);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief rotate the active journals for the collection on all DBservers
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////////////////////////////////////////////////////////////////////////////////
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int rotateActiveJournalOnAllDBServers(std::string const& dbname,
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std::string const& collname);
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class ClusterMethods {
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public:
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// wrapper Class for static functions.
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// Cannot be instanciated.
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ClusterMethods() = delete;
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~ClusterMethods() = delete;
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// @brief Create a new collection on coordinator from a parameter VPack
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// Note that this returns a newly allocated object and ownership is
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// transferred
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// to the caller, which is expressed by the returned unique_ptr.
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static std::shared_ptr<LogicalCollection> createCollectionOnCoordinator(
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TRI_col_type_e collectionType,
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TRI_vocbase_t& vocbase,
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arangodb::velocypack::Slice parameters,
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bool ignoreDistributeShardsLikeErrors,
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bool waitForSyncReplication,
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bool enforceReplicationFactor
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);
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private:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Persist collection in Agency and trigger shard creation process
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////////////////////////////////////////////////////////////////////////////////
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static std::shared_ptr<LogicalCollection> persistCollectionInAgency(
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LogicalCollection* col, bool ignoreDistributeShardsLikeErrors,
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bool waitForSyncReplication, bool enforceReplicationFactor,
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arangodb::velocypack::Slice parameters);
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};
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} // namespace arangodb
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#endif
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