137 lines
4.0 KiB
C++
137 lines
4.0 KiB
C++
/* Copyright (c) 2018, 2021, Alibaba and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL/PolarDB-X Engine hereby grant you an
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additional permission to link the program and your derivative works with the
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separately licensed software that they have included with
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MySQL/PolarDB-X Engine.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#ifndef SQL_PACKAGE_PACKAGE_INCLUDED
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#define SQL_PACKAGE_PACKAGE_INCLUDED
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#include "sql/package/package_common.h"
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#include "sql/package/proc.h"
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#include "sql/psi_memory_key.h"
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/**
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Internal native mysql package.
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Package is the container of all native elements, so It's the singleton
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instance, and initilized when mysqld reboot.
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*/
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namespace im {
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/* Native procedures container */
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class Package : public PSI_memory_base {
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typedef Package_element_map<Proc> Proc_map;
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/* Type selector for element map */
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template <typename T>
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struct Type_selector {};
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public:
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explicit Package(PSI_memory_key key)
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: PSI_memory_base(key), m_proc_map(key) {}
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virtual ~Package();
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/* Disable copy and assign function */
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Package(const Package &) = delete;
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Package(const Package &&) = delete;
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Package &operator=(const Package &) = delete;
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/**
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Global singleton package container.
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@retval package instance
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*/
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static Package *instance();
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/**
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Register native element
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@param[in] schema_name Element schema.
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@param[in] element_name Element name
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@param[in] element Object instance
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@retval false Failure
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@retval true Success
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*/
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template <typename T>
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bool register_element(const std::string &schema_name,
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const std::string &element_name, T *element) {
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std::pair<typename Package_element_map<T>::iterator, bool> it;
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it = m_map<T>()->insert(typename Package_element_map<T>::value_type(
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typename Package_element_map<T>::key_type(schema_name, element_name),
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element));
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return it.second;
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}
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/**
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Lookup element
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@param[in] schema_name Element schema.
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@param[in] element_name Element name
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@retval element Object instance
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*/
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template <typename T>
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const T *lookup_element(const std::string &schema_name,
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const std::string &element_name) {
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typename Package_element_map<T>::const_iterator it;
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it = m_map<T>()->find(
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typename Package_element_map<T>::key_type(schema_name, element_name));
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if (it == m_map<T>()->end())
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return nullptr;
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else
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return it->second;
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}
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template <typename T>
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const Proc_map *get_all_element(){
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return m_map<T>();
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}
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private:
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/* Proc map getting */
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Proc_map *m_map(Type_selector<Proc>) { return &m_proc_map; }
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/* Template map getting */
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template <typename T>
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Package_element_map<T> *m_map() {
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return m_map(Type_selector<T>());
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}
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/* Clear all elements */
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void clear_elements() {
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for (auto it = m_proc_map.cbegin(); it != m_proc_map.cend(); ++it) {
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delete it->second;
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}
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m_proc_map.clear();
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}
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private:
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/* Native proc container */
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Proc_map m_proc_map;
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};
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} /* namespace im */
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#endif
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