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/*
Copyright (c) 2015, 2025, Oracle and/or its affiliates.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.
This program is designed to work with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation. The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have either included with
the program or referenced in the documentation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License, version 2.0, for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef OBJECT_QUEUE_INCLUDED
#define OBJECT_QUEUE_INCLUDED
#include <sys/types.h>
#include <atomic>
#include <functional>
#include <map>
#include <mutex>
#include <queue>
#include "client/base/abstract_program.h"
#include "client/dump/abstract_dump_task.h"
#include "client/dump/abstract_object_reader_wrapper.h"
#include "client/dump/i_object_reader.h"
#include "client/dump/thread_group.h"
#include "my_inttypes.h"
namespace Mysql {
namespace Tools {
namespace Dump {
/**
Wrapper to another Object Reader, adds all objects to read on queue. Allows
specified number of threads to dequeue and process objects.
*/
class Object_queue : public Abstract_object_reader_wrapper,
public I_object_reader {
public:
Object_queue(std::function<bool(const Mysql::Tools::Base::Message_data &)>
*message_handler,
Simple_id_generator *object_id_generator, uint threads_count,
std::function<void(bool)> *thread_callback,
Mysql::Tools::Base::Abstract_program *program);
~Object_queue() override;
void read_object(Item_processing_data *item_to_process) override;
// Fix "inherits ... via dominance" warnings
void register_progress_watcher(
I_progress_watcher *new_progress_watcher) override {
Abstract_chain_element::register_progress_watcher(new_progress_watcher);
}
// Fix "inherits ... via dominance" warnings
uint64 get_id() const override { return Abstract_chain_element::get_id(); }
void stop_queue();
protected:
// Fix "inherits ... via dominance" warnings
void item_completion_in_child_callback(
Item_processing_data *item_processed) override {
Abstract_chain_element::item_completion_in_child_callback(item_processed);
}
private:
void queue_thread();
void task_availability_callback(const Abstract_dump_task *available_task);
void add_ready_items_to_queue(
std::map<const I_dump_task *,
std::vector<Item_processing_data *> *>::iterator it);
/*
Group of threads to process objects on queue.
*/
my_boost::thread_group m_thread_group;
std::mutex m_queue_mutex;
/*
Maps task to all processing items that processes specified task.
*/
std::map<const I_dump_task *, std::vector<Item_processing_data *> *>
m_tasks_map;
std::queue<Item_processing_data *> m_items_ready_for_processing;
/*
Standard callback on task completion to run all possible dependent tasks.
*/
std::function<void(const Abstract_dump_task *)> m_task_availability_callback;
/*
Indicates if queue is running. If set to false, all pending and being
processed tasks should complete, then queue is ready to close.
*/
std::atomic<bool> m_is_queue_running;
/*
Callback called when created thread is starting or exiting. Call is done in
execution context of created thread. Parameter value
of true is used for thread start, false for thread exit.
*/
std::function<void(bool)> *m_thread_callback;
Mysql::Tools::Base::Abstract_program *m_program;
};
} // namespace Dump
} // namespace Tools
} // namespace Mysql
#endif
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