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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2022
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#pragma once
#include "td/actor/actor.h"
#include "td/actor/PromiseFuture.h"
#include "td/utils/common.h"
#include "td/utils/Promise.h"
#include "td/utils/Status.h"
namespace td {
class MultiPromiseInterface {
public:
virtual void add_promise(Promise<> &&promise) = 0;
virtual Promise<> get_promise() = 0;
virtual size_t promise_count() const = 0;
virtual void set_ignore_errors(bool ignore_errors) = 0;
MultiPromiseInterface() = default;
MultiPromiseInterface(const MultiPromiseInterface &) = delete;
MultiPromiseInterface &operator=(const MultiPromiseInterface &) = delete;
MultiPromiseInterface(MultiPromiseInterface &&) = default;
MultiPromiseInterface &operator=(MultiPromiseInterface &&) = default;
virtual ~MultiPromiseInterface() = default;
};
class MultiPromise final : public MultiPromiseInterface {
public:
void add_promise(Promise<> &&promise) final {
impl_->add_promise(std::move(promise));
}
Promise<> get_promise() final {
return impl_->get_promise();
}
size_t promise_count() const final {
return impl_->promise_count();
}
void set_ignore_errors(bool ignore_errors) final {
impl_->set_ignore_errors(ignore_errors);
}
MultiPromise() = default;
explicit MultiPromise(unique_ptr<MultiPromiseInterface> impl) : impl_(std::move(impl)) {
}
private:
unique_ptr<MultiPromiseInterface> impl_;
};
class MultiPromiseActor final
: public Actor
, public MultiPromiseInterface {
public:
explicit MultiPromiseActor(string name) : name_(std::move(name)) {
}
void add_promise(Promise<Unit> &&promise) final;
Promise<Unit> get_promise() final;
void set_ignore_errors(bool ignore_errors) final;
size_t promise_count() const final;
private:
void set_result(Result<Unit> &&result);
string name_;
vector<Promise<Unit>> promises_; // promises waiting for result
vector<FutureActor<Unit>> futures_; // futures waiting for result of the queries
size_t received_results_ = 0;
bool ignore_errors_ = false;
Result<Unit> result_;
void raw_event(const Event::Raw &event) final;
void tear_down() final;
void on_start_migrate(int32) final {
UNREACHABLE();
}
void on_finish_migrate() final {
UNREACHABLE();
}
};
template <>
class ActorTraits<MultiPromiseActor> {
public:
static constexpr bool need_context = false;
static constexpr bool need_start_up = true;
};
class MultiPromiseActorSafe final : public MultiPromiseInterface {
public:
void add_promise(Promise<Unit> &&promise) final;
Promise<Unit> get_promise() final;
void set_ignore_errors(bool ignore_errors) final;
size_t promise_count() const final;
explicit MultiPromiseActorSafe(string name) : multi_promise_(td::make_unique<MultiPromiseActor>(std::move(name))) {
}
MultiPromiseActorSafe(const MultiPromiseActorSafe &other) = delete;
MultiPromiseActorSafe &operator=(const MultiPromiseActorSafe &other) = delete;
MultiPromiseActorSafe(MultiPromiseActorSafe &&other) = delete;
MultiPromiseActorSafe &operator=(MultiPromiseActorSafe &&other) = delete;
~MultiPromiseActorSafe() final;
private:
unique_ptr<MultiPromiseActor> multi_promise_;
};
} // namespace td
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