| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| **/ |
| |
| #ifndef QUICKSTEP_STORAGE_DATA_PROVIDER_THREAD_HPP_ |
| #define QUICKSTEP_STORAGE_DATA_PROVIDER_THREAD_HPP_ |
| |
| #include <cstddef> |
| |
| #include "query_execution/QueryExecutionTypedefs.hpp" |
| #include "storage/StorageConfig.h" |
| #include "threading/Thread.hpp" |
| #include "utility/Macros.hpp" |
| |
| #include "tmb/native_net_client_message_bus.h" |
| |
| namespace quickstep { |
| |
| class CatalogDatabase; |
| class CatalogRelation; |
| class QueryProcessor; |
| class StorageManager; |
| |
| /** \addtogroup Storage |
| * @{ |
| */ |
| |
| /** |
| * @brief A thread that provides access to query results (e.g. storage blocks), |
| * to Quickstep clients. |
| **/ |
| class DataProviderThread : public Thread { |
| public: |
| /** |
| * @brief Constructor. |
| * |
| * @param database The CatalogDatabase. |
| * @param query_processor The QueryProcessor object. |
| * @param storage_manager The storage manager. |
| * @param bus The TMB. |
| * @param cpu_id The ID of the CPU to affinitize this thread to, or -1 to |
| * indicate no affinity. |
| **/ |
| DataProviderThread(CatalogDatabase *database, |
| QueryProcessor *query_processor, |
| StorageManager *storage_manager, |
| tmb::MessageBus *bus, |
| const int cpu_id = -1) |
| : database_(database), |
| query_processor_(query_processor), |
| storage_manager_(storage_manager), |
| bus_(bus), |
| cpu_id_(cpu_id), |
| dpt_client_id_(bus_->Connect()) { |
| bus_->RegisterClientAsReceiver(dpt_client_id_, kPoisonMessage); |
| bus_->RegisterClientAsReceiver(dpt_client_id_, kBlockRequestMessage); |
| bus_->RegisterClientAsReceiver(dpt_client_id_, kFinishReadingRelationMessage); |
| bus_->RegisterClientAsSender(dpt_client_id_, kBlockResponseMessage); |
| } |
| |
| ~DataProviderThread() override { |
| } |
| |
| tmb::client_id getTMBClientID() const { |
| return dpt_client_id_; |
| } |
| |
| protected: |
| void run() override; |
| |
| private: |
| CatalogDatabase *database_; |
| QueryProcessor *query_processor_; |
| StorageManager *storage_manager_; |
| tmb::MessageBus *bus_; |
| |
| const int cpu_id_; |
| |
| tmb::client_id dpt_client_id_; |
| |
| DISALLOW_COPY_AND_ASSIGN(DataProviderThread); |
| }; |
| |
| /** @} */ |
| |
| } // namespace quickstep |
| |
| #endif // QUICKSTEP_STORAGE_DATA_PROVIDER_THREAD_HPP_ |