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/*-
* Public Domain 2014-present MongoDB, Inc.
* Public Domain 2008-2014 WiredTiger, Inc.
*
* This is free and unencumbered software released into the public domain.
*
* Anyone is free to copy, modify, publish, use, compile, sell, or
* distribute this software, either in source code form or as a compiled
* binary, for any purpose, commercial or non-commercial, and by any
* means.
*
* In jurisdictions that recognize copyright laws, the author or authors
* of this software dedicate any and all copyright interest in the
* software to the public domain. We make this dedication for the benefit
* of the public at large and to the detriment of our heirs and
* successors. We intend this dedication to be an overt act of
* relinquishment in perpetuity of all present and future rights to this
* software under copyright law.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef WORKLOAD_GENERATOR_H
#define WORKLOAD_GENERATOR_H
#include <algorithm>
#include <atomic>
#include <functional>
#include <map>
#include "core/throttle.h"
#include "workload/database_model.h"
#include "workload/database_operation.h"
#include "workload/random_generator.h"
#include "workload/workload_tracking.h"
namespace test_harness {
/*
* Helper class to enable scalable operation types in the database_operation.
*/
class operation_config {
public:
operation_config(configuration *config, thread_type type)
: config(config), type(type), thread_count(config->get_int(THREAD_COUNT))
{
}
/* Returns a function pointer to the member function of the supplied database operation. */
std::function<void(test_harness::thread_context *)>
get_func(database_operation *dbo)
{
switch (type) {
case thread_type::INSERT:
return (std::bind(&database_operation::insert_operation, dbo, std::placeholders::_1));
case thread_type::READ:
return (std::bind(&database_operation::read_operation, dbo, std::placeholders::_1));
case thread_type::UPDATE:
return (std::bind(&database_operation::update_operation, dbo, std::placeholders::_1));
default:
/* This may cause a separate testutil_die in type_string but that should be okay. */
testutil_die(EINVAL, "unexpected thread_type: %s", type_string(type).c_str());
}
}
configuration *config;
const thread_type type;
const int64_t thread_count;
};
/*
* Class that can execute operations based on a given configuration.
*/
class workload_generator : public component {
public:
workload_generator(configuration *configuration, database_operation *db_operation,
timestamp_manager *timestamp_manager, workload_tracking *tracking, database &database)
: component("workload_generator", configuration), _database(database),
_database_operation(db_operation), _timestamp_manager(timestamp_manager),
_tracking(tracking)
{
}
~workload_generator()
{
for (auto &it : _workers)
delete it;
}
/* Delete the copy constructor and the assignment operator. */
workload_generator(const workload_generator &) = delete;
workload_generator &operator=(const workload_generator &) = delete;
/* Do the work of the main part of the workload. */
void
run() override final
{
configuration *populate_config;
std::vector<operation_config> operation_configs;
uint64_t thread_id = 0;
/* Retrieve useful parameters from the test configuration. */
operation_configs.push_back(
operation_config(_config->get_subconfig(INSERT_CONFIG), thread_type::INSERT));
operation_configs.push_back(
operation_config(_config->get_subconfig(READ_CONFIG), thread_type::READ));
operation_configs.push_back(
operation_config(_config->get_subconfig(UPDATE_CONFIG), thread_type::UPDATE));
populate_config = _config->get_subconfig(POPULATE_CONFIG);
/* Populate the database. */
_database_operation->populate(_database, _timestamp_manager, populate_config, _tracking);
_db_populated = true;
delete populate_config;
/* Generate threads to execute read operations on the collections. */
for (auto &it : operation_configs) {
debug_print("Workload_generator: Creating " + std::to_string(it.thread_count) + " " +
type_string(it.type) + " threads.",
DEBUG_INFO);
for (size_t i = 0; i < it.thread_count && _running; ++i) {
thread_context *tc = new thread_context(
thread_id++, it.type, it.config, _timestamp_manager, _tracking, _database);
_workers.push_back(tc);
_thread_manager.add_thread(it.get_func(_database_operation), tc);
}
/*
* Don't forget to delete the config we created earlier. While we do pass the config
* into the thread context it is not saved, so we are safe to do this.
*/
delete it.config;
}
}
void
finish() override final
{
component::finish();
for (const auto &it : _workers)
it->finish();
_thread_manager.join();
debug_print("Workload generator: run stage done", DEBUG_TRACE);
}
database &
get_database()
{
return (_database);
}
bool
db_populated() const
{
return (_db_populated);
}
private:
database &_database;
database_operation *_database_operation;
thread_manager _thread_manager;
timestamp_manager *_timestamp_manager;
workload_tracking *_tracking;
std::vector<thread_context *> _workers;
bool _db_populated = false;
};
} // namespace test_harness
#endif
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