| /** |
| * 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. |
| **/ |
| |
| #ifndef QUICKSTEP_QUERY_EXECUTION_POLICY_ENFORCER_DISTRIBUTED_HPP_ |
| #define QUICKSTEP_QUERY_EXECUTION_POLICY_ENFORCER_DISTRIBUTED_HPP_ |
| |
| #include <cstddef> |
| #include <memory> |
| #include <vector> |
| |
| #include "query_execution/PolicyEnforcerBase.hpp" |
| #include "query_execution/ShiftbossDirectory.hpp" |
| #include "utility/Macros.hpp" |
| |
| #include "tmb/id_typedefs.h" |
| |
| namespace tmb { |
| class MessageBus; |
| class TaggedMessage; |
| } |
| |
| namespace quickstep { |
| |
| class CatalogDatabaseLite; |
| class QueryHandle; |
| class QueryManagerBase; |
| |
| namespace serialization { class WorkOrderMessage; } |
| |
| /** \addtogroup QueryExecution |
| * @{ |
| */ |
| |
| /** |
| * @brief A class that ensures that a high level policy is maintained |
| * in sharing resources among concurrent queries. |
| **/ |
| class PolicyEnforcerDistributed final : public PolicyEnforcerBase { |
| public: |
| /** |
| * @brief Constructor. |
| * |
| * @param foreman_client_id The TMB client ID of the Foreman. |
| * @param catalog_database The CatalogDatabase used. |
| * @param bus The TMB. |
| **/ |
| PolicyEnforcerDistributed(const tmb::client_id foreman_client_id, |
| CatalogDatabaseLite *catalog_database, |
| ShiftbossDirectory *shiftboss_directory, |
| tmb::MessageBus *bus, |
| const bool profile_individual_workorders = false) |
| : PolicyEnforcerBase(catalog_database, profile_individual_workorders), |
| foreman_client_id_(foreman_client_id), |
| shiftboss_directory_(shiftboss_directory), |
| bus_(bus) {} |
| |
| /** |
| * @brief Destructor. |
| **/ |
| ~PolicyEnforcerDistributed() override {} |
| |
| bool admitQuery(QueryHandle *query_handle) override; |
| |
| /** |
| * @brief Get work order messages to be dispatched. These messages come from |
| * the active queries. |
| * |
| * @param work_order_proto_messages The work order messages to be dispatched. |
| **/ |
| void getWorkOrderProtoMessages( |
| std::vector<std::unique_ptr<serialization::WorkOrderMessage>> *work_order_proto_messages); |
| |
| /** |
| * @brief Process the initiate rebuild work order response message. |
| * |
| * @param tagged_message The message. |
| **/ |
| void processInitiateRebuildResponseMessage(const tmb::TaggedMessage &tagged_message); |
| |
| private: |
| void decrementNumQueuedWorkOrders(const std::size_t shiftboss_index) override { |
| shiftboss_directory_->decrementNumQueuedWorkOrders(shiftboss_index); |
| } |
| |
| void onQueryCompletion(QueryManagerBase *query_manager) override; |
| |
| void initiateQueryInShiftboss(QueryHandle *query_handle); |
| |
| const tmb::client_id foreman_client_id_; |
| |
| ShiftbossDirectory *shiftboss_directory_; |
| |
| tmb::MessageBus *bus_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PolicyEnforcerDistributed); |
| }; |
| |
| /** @} */ |
| |
| } // namespace quickstep |
| |
| #endif // QUICKSTEP_QUERY_EXECUTION_POLICY_ENFORCER_DISTRIBUTED_HPP_ |