TQueue: second commit

GitOrigin-RevId: b9c1ffbbf8d0c62755c8d151c61588cd15a66ea0
This commit is contained in:
Arseny Smirnov 2019-08-06 17:30:15 +03:00
parent 3b1eeb001b
commit 892d8b8351

View File

@ -12,50 +12,153 @@
#include "td/utils/HashMap.h"
#include "td/utils/misc.h"
#include "td/utils/tests.h"
#include "td/utils/tl_storers.h"
#include "td/utils/tl_parsers.h"
#include "td/utils/tl_helpers.h"
#include <map>
#include <set>
#include "td/db/binlog/Binlog.h"
#include "td/db/binlog/BinlogEvent.h"
#include "td/db/binlog/BinlogHelper.h"
namespace td {
using EventId = int32;
class EventId {
public:
constexpr static int32 MAX_ID = 2000000000;
EventId() = default;
static Result<EventId> from_int32(int32 id) {
if (!is_valid(id)) {
return Status::Error("Invalid id");
}
return EventId(id);
}
static EventId create_random() {
return from_int32(Random::fast_uint32() % (MAX_ID / 2) + 10).move_as_ok();
}
int32 value() const {
return id_;
}
Result<EventId> next() const {
return from_int32(id_ + 1);
}
Result<EventId> advance(size_t offset) const {
TRY_RESULT(new_id, narrow_cast_safe<int32>(id_ + offset));
return from_int32(new_id);
}
bool empty() const {
return id_ == 0;
}
bool operator==(const EventId &other) const {
return id_ == other.id_;
}
friend StringBuilder &operator<<(StringBuilder &sb, const EventId id) {
return sb << "EventId{" << id.value() << "}";
}
private:
int32 id_{0};
explicit EventId(int32 id) : id_(id) {
CHECK(is_valid(id));
}
static bool is_valid(int32 id) {
return 0 <= id && id < MAX_ID;
}
};
using TQueueId = int64;
class TQueue {
public:
struct Event {
EventId id;
Slice data;
double expire_at;
};
class TQueue {
struct RawEvent {
int64 logevent_id{0};
EventId event_id;
string data;
double expire_at{0};
};
class Callback {
public:
EventId push(TQueueId queue_id, Slice data, double expire_at) {
auto &q = queues_[queue_id];
if (q.events.empty()) {
q.head_id = 1;
using RawEvent = TQueue::RawEvent;
virtual ~Callback() {
}
EventId event_id = narrow_cast<EventId>(q.head_id + q.events.size());
q.events.push<RawEvent>({data.str(), expire_at});
virtual int64 push(TQueueId queue_id, const RawEvent &event) = 0;
virtual void pop(int64 logevent_id) = 0;
};
void set_callback(unique_ptr<Callback> callback) {
callback_ = std::move(callback);
}
unique_ptr<Callback> extract_callback() {
return std::move(callback_);
}
void do_push(TQueueId queue_id, RawEvent &&raw_event) {
CHECK(!raw_event.event_id.empty());
if (callback_ && raw_event.logevent_id == 0) {
raw_event.logevent_id = callback_->push(queue_id, raw_event);
}
auto &q = queues_[queue_id];
q.tail_id = raw_event.event_id.next().move_as_ok();
q.events.push(std::move(raw_event));
}
void on_pop(int64 logevent_id) {
if (callback_) {
callback_->pop(logevent_id);
}
}
EventId push(TQueueId queue_id, string data, double expire_at, EventId new_id = EventId()) {
auto &q = queues_[queue_id];
EventId event_id;
while (true) {
if (q.events.empty()) {
q.tail_id = new_id.empty() ? EventId::create_random() : new_id;
}
event_id = q.tail_id;
CHECK(!event_id.empty());
if (event_id.next().is_ok()) {
break;
}
confirm_read(q, event_id);
}
RawEvent raw_event;
raw_event.event_id = event_id;
raw_event.data = data;
raw_event.expire_at = expire_at;
do_push(queue_id, std::move(raw_event));
return event_id;
}
EventId get_head(TQueueId queue_id) {
EventId get_head(TQueueId queue_id) const {
auto it = queues_.find(queue_id);
if (it == queues_.end()) {
return 0;
return EventId();
}
auto &q = it->second;
if (q.events.empty()) {
return 0;
return EventId();
}
return q.head_id;
return q.events.front().event_id;
}
Result<EventId> get_tail(TQueueId queue_id) {
EventId get_tail(TQueueId queue_id) const {
auto it = queues_.find(queue_id);
if (it == queues_.end()) {
return 0;
return EventId();
}
auto &q = it->second;
if (q.events.empty()) {
return 0;
return EventId();
}
return narrow_cast<EventId>(q.head_id + q.events.size() - 1);
return q.tail_id;
}
Result<size_t> get(TQueueId queue_id, EventId from_id, double now, MutableSpan<Event> events) {
@ -64,10 +167,8 @@ class TQueue {
return 0;
}
auto &q = it->second;
while (!q.events.empty() && q.head_id < from_id) {
q.head_id++;
q.events.pop();
}
//TODO: sanity check for from_id
confirm_read(q, from_id);
if (q.events.empty()) {
return 0;
}
@ -77,12 +178,13 @@ class TQueue {
for (size_t i = 0; i < from_events.size(); i++) {
auto &from = from_events[i];
if (from.expire_at < now) {
//TODO: pop this element
continue;
}
auto &to = events[res_n];
to.data = from.data;
to.id = narrow_cast<EventId>(q.head_id + i);
to.id = from.event_id;
to.expire_at = from.expire_at;
res_n++;
@ -93,31 +195,228 @@ class TQueue {
return res_n;
}
struct RawEvent {
string data;
double expire_at{0};
};
private:
struct Queue {
EventId head_id{0};
EventId tail_id;
VectorQueue<RawEvent> events;
};
HashMap<TQueueId, Queue> queues_;
unique_ptr<Callback> callback_;
void confirm_read(Queue &q, EventId till_id) {
while (!q.events.empty() && q.events.front().event_id.value() < till_id.value()) {
on_pop(q.events.front().logevent_id);
q.events.pop();
}
}
};
template <class BinlogT>
class TQueueBinlog : public TQueue::Callback {
public:
struct LogEvent : public Storer {
LogEvent() = default;
int32 queue_id;
int32 event_id;
int32 expire_at;
Slice data;
template <class StorerT>
void store(StorerT &&storer) const {
using td::store;
store(queue_id, storer);
store(event_id, storer);
store(expire_at, storer);
store(data, storer);
}
template <class ParserT>
void parse(ParserT &&parser) {
parse(queue_id, parser);
parse(event_id, parser);
parse(expire_at, parser);
parse(data, parser);
}
size_t size() const override {
TlStorerCalcLength storer;
store(storer);
return storer.get_length();
}
size_t store(uint8 *ptr) const override {
TlStorerUnsafe storer(ptr);
store(storer);
return static_cast<size_t>(storer.get_buf() - ptr);
}
};
int64 push(TQueueId queue_id, const RawEvent &event) override {
LogEvent log_event;
log_event.queue_id = queue_id;
log_event.event_id = event.event_id.value();
log_event.expire_at = static_cast<int32>(event.expire_at);
log_event.data = event.data;
return binlog_->add(magic_, log_event);
}
void pop(int64 logevent_id) override {
binlog_->erase(binlog_, logevent_id);
}
Status replay(const BinlogEvent &binlog_event, TQueue &q) {
LogEvent event;
TlParser parser(binlog_event.data_);
event.parse(parser);
TRY_STATUS(parser.get_status());
TRY_RESULT(event_id, EventId::from_int32(event.event_id));
RawEvent raw_event;
raw_event.logevent_id = binlog_event.id_;
raw_event.event_id = event_id;
raw_event.expire_at = event.expire_at;
raw_event.data = event.data.str();
q.do_push(event.queue_id, std::move(raw_event));
return Status::OK();
}
void set_binlog(std::shared_ptr<BinlogT> binlog) {
binlog_ = std::move(binlog);
}
private:
std::shared_ptr<BinlogT> binlog_;
int32 magic_{0};
};
class MemoryStorage : public TQueue::Callback {
public:
int64 push(TQueueId queue_id, const RawEvent &event) override {
auto logevent_id = next_logevent_id_++;
events_[logevent_id] = std::make_pair(queue_id, event);
return logevent_id;
}
void pop(int64 logevent_id) override {
events_.erase(logevent_id);
}
void replay(TQueue &q) {
LOG(ERROR) << events_.size();
for (auto e : events_) {
auto x = e.second;
x.second.logevent_id = e.first;
q.do_push(x.first, std::move(x.second));
}
}
private:
int64 next_logevent_id_{1};
std::map<int64, std::pair<TQueueId, RawEvent>> events_;
};
struct Step {
std::function<void()> func;
td::uint32 weight;
};
class RandomSteps {
public:
RandomSteps(std::vector<Step> steps) : steps_(std::move(steps)) {
for (auto &step : steps_) {
steps_sum_ += step.weight;
}
}
template <class Random>
void step(Random &rnd) {
auto w = rnd() % steps_sum_;
for (auto &step : steps_) {
if (w < step.weight) {
step.func();
break;
}
w -= step.weight;
}
}
private:
std::vector<Step> steps_;
td::int32 steps_sum_ = 0;
};
TEST(TQueue, hands) {
Event events[100];
auto events_span = MutableSpan<Event>(events, 100);
TQueue::Event events[100];
auto events_span = MutableSpan<TQueue::Event>(events, 100);
TQueue tqueue;
auto qid = 12;
ASSERT_EQ(0, tqueue.get_head(qid));
ASSERT_EQ(0, tqueue.get_tail(qid));
ASSERT_EQ(true, tqueue.get_head(qid).empty());
ASSERT_EQ(true, tqueue.get_tail(qid).empty());
tqueue.push(qid, "hello", 0);
auto head = tqueue.get_head(qid);
ASSERT_EQ(head, tqueue.get_tail(qid));
ASSERT_EQ(1, tqueue.get(qid, head, 0, events_span).move_as_ok());
ASSERT_EQ(head.next().ok(), tqueue.get_tail(qid));
ASSERT_EQ(1u, tqueue.get(qid, head, 0, events_span).move_as_ok());
}
TEST(TQueue, random) {
// Just do random ops with one queue
auto qid = 12;
EventId first_id = EventId::from_int32(EventId::MAX_ID - 100).move_as_ok();
//first_id = {};
TQueue tqueue_memory;
//auto memory_storage = td::make_unique<MemoryStorage>();
//auto memory_storage_ptr = memory_storage.get();
//tqueue_memory.set_callback(std::move(memory_storage));
TQueue tqueue_binlog;
auto binlog_storage = td::make_unique<MemoryStorage>();
auto binlog_storage_ptr = binlog_storage.get();
tqueue_binlog.set_callback(std::move(binlog_storage));
Random::Xorshift128plus rnd(123);
auto push_event = [&] {
auto data = PSTRING() << rnd();
tqueue_memory.push(qid, data, 0, first_id);
tqueue_binlog.push(qid, data, 0, first_id);
};
auto get_head = [&] { ASSERT_EQ(tqueue_memory.get_head(qid), tqueue_binlog.get_head(qid)); };
auto get_tail = [&] { ASSERT_EQ(tqueue_memory.get_tail(qid), tqueue_binlog.get_tail(qid)); };
TQueue::Event events_a[100];
auto events_span_a = MutableSpan<TQueue::Event>(events_a, 100);
TQueue::Event events_b[100];
auto events_span_b = MutableSpan<TQueue::Event>(events_b, 100);
auto get = [&] {
auto a_from = tqueue_memory.get_head(qid);
auto b_from = tqueue_binlog.get_head(qid);
ASSERT_EQ(a_from, b_from);
auto tmp = a_from.advance(rnd.fast(-10, 10));
if (tmp.is_ok()) {
a_from = tmp.move_as_ok();
}
auto a_size = tqueue_memory.get(qid, a_from, 0, events_span_a).move_as_ok();
auto b_size = tqueue_binlog.get(qid, a_from, 0, events_span_b).move_as_ok();
ASSERT_EQ(a_size, b_size);
for (size_t i = 0; i < a_size; i++) {
ASSERT_EQ(events_span_a[i].id, events_span_b[i].id);
ASSERT_EQ(events_span_a[i].data, events_span_b[i].data);
}
};
auto restart = [&] {
tqueue_binlog.extract_callback().release();
binlog_storage = unique_ptr<MemoryStorage>(binlog_storage_ptr);
tqueue_binlog = TQueue();
binlog_storage->replay(tqueue_binlog);
tqueue_binlog.set_callback(std::move(binlog_storage));
};
RandomSteps steps({{push_event, 100}, {get_head, 10}, {get_tail, 10}, {get, 40}, {restart, 1}});
for (int i = 0; i < 1000000; i++) {
steps.step(rnd);
}
}
} // namespace td