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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include <list>
#include <memory>
#include "mongo/base/status_with.h"
#include "mongo/executor/task_executor.h"
#include "mongo/platform/mutex.h"
#include "mongo/stdx/condition_variable.h"
namespace mongo {
namespace executor {
struct ConnectionPoolStats;
class ThreadPoolTaskExecutor;
/**
* Implementation of a TaskExecutor that uses ThreadPoolTaskExecutor to submit tasks and allows to
* override methods if needed.
*/
class ShardingTaskExecutor final : public TaskExecutor {
ShardingTaskExecutor(const ShardingTaskExecutor&) = delete;
ShardingTaskExecutor& operator=(const ShardingTaskExecutor&) = delete;
public:
ShardingTaskExecutor(std::unique_ptr<ThreadPoolTaskExecutor> executor);
void startup() override;
void shutdown() override;
void join() override;
SharedSemiFuture<void> joinAsync() override;
bool isShuttingDown() const override;
void appendDiagnosticBSON(BSONObjBuilder* builder) const override;
Date_t now() override;
StatusWith<EventHandle> makeEvent() override;
void signalEvent(const EventHandle& event) override;
StatusWith<CallbackHandle> onEvent(const EventHandle& event, CallbackFn&& work) override;
void waitForEvent(const EventHandle& event) override;
StatusWith<stdx::cv_status> waitForEvent(OperationContext* opCtx,
const EventHandle& event,
Date_t deadline) override;
StatusWith<CallbackHandle> scheduleWork(CallbackFn&& work) override;
StatusWith<CallbackHandle> scheduleWorkAt(Date_t when, CallbackFn&& work) override;
StatusWith<CallbackHandle> scheduleRemoteCommandOnAny(
const RemoteCommandRequestOnAny& request,
const RemoteCommandOnAnyCallbackFn& cb,
const BatonHandle& baton = nullptr) override;
StatusWith<CallbackHandle> scheduleExhaustRemoteCommandOnAny(
const RemoteCommandRequestOnAny& request,
const RemoteCommandOnAnyCallbackFn& cb,
const BatonHandle& baton = nullptr) override;
bool hasTasks() override;
void cancel(const CallbackHandle& cbHandle) override;
void wait(const CallbackHandle& cbHandle,
Interruptible* interruptible = Interruptible::notInterruptible()) override;
void appendConnectionStats(ConnectionPoolStats* stats) const override;
void appendNetworkInterfaceStats(BSONObjBuilder&) const override;
void dropConnections(const HostAndPort& hostAndPort) override;
private:
std::unique_ptr<ThreadPoolTaskExecutor> _executor;
};
} // namespace executor
} // namespace mongo
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