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#pragma once
#include "utils.h"
#include <library/cpp/retry/protos/retry_options.pb.h>
#include <util/datetime/base.h>
#include <util/generic/maybe.h>
#include <util/generic/typetraits.h>
#include <util/generic/yexception.h>
#include <functional>
struct TRetryOptions {
ui32 RetryCount;
// TotalDuration = SleepDuration +/- SleepRandomDelta + (attempt * SleepIncrement) + (2**attempt * SleepExponentialMultiplier)
TDuration SleepDuration;
TDuration SleepRandomDelta;
TDuration SleepIncrement;
TDuration SleepExponentialMultiplier;
std::function<void(TDuration)> SleepFunction;
TRetryOptions(ui32 retryCount = 3, TDuration sleepDuration = TDuration::Seconds(1), TDuration sleepRandomDelta = TDuration::Zero(),
TDuration sleepIncrement = TDuration::Zero(), TDuration sleepExponentialMultiplier = TDuration::Zero(),
std::function<void(TDuration)> sleepFunction = [](TDuration d) { Sleep(d); }) // can't use Sleep itself due to Win compilation error
: RetryCount(retryCount)
, SleepDuration(sleepDuration)
, SleepRandomDelta(sleepRandomDelta)
, SleepIncrement(sleepIncrement)
, SleepExponentialMultiplier(sleepExponentialMultiplier)
, SleepFunction(sleepFunction)
{
}
TRetryOptions& WithCount(ui32 retryCount) {
RetryCount = retryCount;
return *this;
}
TRetryOptions& WithSleep(TDuration sleepDuration) {
SleepDuration = sleepDuration;
return *this;
}
TRetryOptions& WithRandomDelta(TDuration sleepRandomDelta) {
SleepRandomDelta = sleepRandomDelta;
return *this;
}
TRetryOptions& WithIncrement(TDuration sleepIncrement) {
SleepIncrement = sleepIncrement;
return *this;
}
TRetryOptions& WithExponentialMultiplier(TDuration sleepExponentialMultiplier) {
SleepExponentialMultiplier = sleepExponentialMultiplier;
return *this;
}
TRetryOptions& WithSleepFunction(std::function<void(TDuration)> sleepFunction) {
SleepFunction = sleepFunction;
return *this;
}
// for compatibility attempt == 0 by default
TDuration GetTimeToSleep(ui32 attempt = 0) const {
return SleepDuration + NRetryPrivate::AddRandomDelta(SleepRandomDelta) + NRetryPrivate::AddIncrement(attempt, SleepIncrement) + NRetryPrivate::AddExponentialMultiplier(attempt, SleepExponentialMultiplier);
}
static TRetryOptions Count(ui32 retryCount) {
return TRetryOptions(retryCount);
}
static TRetryOptions Default() {
return TRetryOptions();
}
static TRetryOptions NoRetry() {
return TRetryOptions(0);
}
};
template <typename TResult, typename TException = yexception>
TMaybe<TResult> DoWithRetry(std::function<TResult()> func, std::function<void(const TException&)> onFail, TRetryOptions retryOptions, bool throwLast) {
for (ui32 attempt = 0; attempt <= retryOptions.RetryCount; ++attempt) {
try {
return func();
} catch (TException& ex) {
onFail(ex);
if (attempt == retryOptions.RetryCount) {
if (throwLast) {
throw;
}
} else {
auto sleep = retryOptions.SleepFunction;
sleep(retryOptions.GetTimeToSleep(attempt));
}
}
}
return Nothing();
}
template <typename TResult, typename TException = yexception>
TMaybe<TResult> DoWithRetry(std::function<TResult()> func, TRetryOptions retryOptions, bool throwLast) {
return DoWithRetry<TResult, TException>(func, [](const TException&){}, retryOptions, throwLast);
}
template <typename TException = yexception>
bool DoWithRetry(std::function<void()> func, std::function<void(const TException&)> onFail, TRetryOptions retryOptions, bool throwLast) {
auto f = [&]() {
func();
return nullptr;
};
return DoWithRetry<void*, TException>(f, onFail, retryOptions, throwLast).Defined();
}
template <typename TException = yexception>
bool DoWithRetry(std::function<void()> func, TRetryOptions retryOptions, bool throwLast) {
auto f = [&]() {
func();
return nullptr;
};
return DoWithRetry<void*, TException>(f, [](const TException&){}, retryOptions, throwLast).Defined();
}
void DoWithRetry(std::function<void()> func, TRetryOptions retryOptions);
bool DoWithRetryOnRetCode(std::function<bool()> func, TRetryOptions retryOptions);
Y_DECLARE_PODTYPE(TRetryOptions);
TRetryOptions MakeRetryOptions(const NRetry::TRetryOptionsPB& retryOptions);
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