mirror of https://gitee.com/bigwinds/arangodb
115 lines
3.6 KiB
C++
115 lines
3.6 KiB
C++
////////////////////////////////////////////////////////////////////////////////
|
|
/// DISCLAIMER
|
|
///
|
|
/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
|
|
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
|
|
///
|
|
/// Licensed under the Apache License, Version 2.0 (the "License");
|
|
/// you may not use this file except in compliance with the License.
|
|
/// You may obtain a copy of the License at
|
|
///
|
|
/// http://www.apache.org/licenses/LICENSE-2.0
|
|
///
|
|
/// Unless required by applicable law or agreed to in writing, software
|
|
/// distributed under the License is distributed on an "AS IS" BASIS,
|
|
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
/// See the License for the specific language governing permissions and
|
|
/// limitations under the License.
|
|
///
|
|
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
|
|
///
|
|
/// @author Michael Hackstein
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#ifndef ARANGOD_AQL_ENGINE_INFO_CONTAINER_COORDINATOR_H
|
|
#define ARANGOD_AQL_ENGINE_INFO_CONTAINER_COORDINATOR_H 1
|
|
|
|
#include "Basics/Common.h"
|
|
|
|
#include "Aql/types.h"
|
|
#include "Cluster/ClusterInfo.h"
|
|
|
|
#include <stack>
|
|
namespace arangodb {
|
|
|
|
namespace aql {
|
|
|
|
class ExecutionEngine;
|
|
class ExecutionEngineResult;
|
|
class ExecutionNode;
|
|
class Query;
|
|
class QueryRegistry;
|
|
|
|
class EngineInfoContainerCoordinator {
|
|
private:
|
|
struct EngineInfo {
|
|
public:
|
|
EngineInfo(QueryId id, size_t idOfRemoteNode);
|
|
~EngineInfo();
|
|
#if (_MSC_VER != 0)
|
|
#pragma warning(disable : 4521) // stfu wintendo.
|
|
#endif
|
|
EngineInfo(EngineInfo&) = delete;
|
|
EngineInfo(EngineInfo const& other) = delete;
|
|
EngineInfo(EngineInfo const&& other);
|
|
|
|
void addNode(ExecutionNode* en);
|
|
|
|
Result buildEngine(Query* query, QueryRegistry* queryRegistry, std::string const& dbname,
|
|
std::unordered_set<std::string> const& restrictToShards,
|
|
MapRemoteToSnippet const& dbServerQueryIds,
|
|
std::vector<uint64_t>& coordinatorQueryIds) const;
|
|
|
|
QueryId queryId() const { return _id; }
|
|
|
|
private:
|
|
// The generated id how we can find this query part
|
|
// in the coordinators registry.
|
|
QueryId const _id;
|
|
|
|
// The nodes belonging to this plan.
|
|
std::vector<ExecutionNode*> _nodes;
|
|
|
|
// id of the remote node this plan collects data from
|
|
size_t _idOfRemoteNode;
|
|
};
|
|
|
|
public:
|
|
EngineInfoContainerCoordinator();
|
|
|
|
~EngineInfoContainerCoordinator();
|
|
|
|
// Insert a new node into the last engine on the stack
|
|
void addNode(ExecutionNode* node);
|
|
|
|
// Open a new snippet, which is connected to the given remoteNode id
|
|
void openSnippet(size_t idOfRemoteNode);
|
|
|
|
// Close the currently open snippet.
|
|
// This will finallizes the EngineInfo from the given information
|
|
// This will intentionally NOT insert the Engines into the query
|
|
// registry for easier cleanup
|
|
// Returns the queryId of the closed snippet
|
|
QueryId closeSnippet();
|
|
|
|
// Build the Engines on the coordinator
|
|
// * Creates the ExecutionBlocks
|
|
// * Injects all Parts but the First one into QueryRegistery
|
|
// Return the first engine which is not added in the Registry
|
|
ExecutionEngineResult buildEngines(Query* query, QueryRegistry* registry,
|
|
std::string const& dbname,
|
|
std::unordered_set<std::string> const& restrictToShards,
|
|
MapRemoteToSnippet const& dbServerQueryIds) const;
|
|
|
|
private:
|
|
// @brief List of EngineInfos to distribute accross the cluster
|
|
std::vector<EngineInfo> _engines;
|
|
|
|
std::stack<size_t> _engineStack;
|
|
};
|
|
|
|
} // namespace aql
|
|
} // namespace arangodb
|
|
|
|
#endif
|