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// Copyright (c) 2018-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#pragma once
#include "monitoring/instrumented_mutex.h"
#include "options/db_options.h"
#include "rocksdb/listener.h"
#include "rocksdb/status.h"
namespace rocksdb {
class DBImpl;
class ErrorHandler {
public:
ErrorHandler(DBImpl* db, const ImmutableDBOptions& db_options,
InstrumentedMutex* db_mutex)
: db_(db),
db_options_(db_options),
bg_error_(Status::OK()),
recovery_error_(Status::OK()),
db_mutex_(db_mutex),
auto_recovery_(false),
recovery_in_prog_(false) {}
~ErrorHandler() {}
void EnableAutoRecovery() { auto_recovery_ = true; }
Status::Severity GetErrorSeverity(BackgroundErrorReason reason,
Status::Code code,
Status::SubCode subcode);
Status SetBGError(const Status& bg_err, BackgroundErrorReason reason);
Status GetBGError() { return bg_error_; }
Status GetRecoveryError() { return recovery_error_; }
Status ClearBGError();
bool IsDBStopped() {
return !bg_error_.ok() &&
bg_error_.severity() >= Status::Severity::kHardError;
}
bool IsBGWorkStopped() {
return !bg_error_.ok() &&
(bg_error_.severity() >= Status::Severity::kHardError ||
!auto_recovery_);
}
bool IsRecoveryInProgress() { return recovery_in_prog_; }
Status RecoverFromBGError(bool is_manual = false);
void CancelErrorRecovery();
private:
DBImpl* db_;
const ImmutableDBOptions& db_options_;
Status bg_error_;
// A separate Status variable used to record any errors during the
// recovery process from hard errors
Status recovery_error_;
InstrumentedMutex* db_mutex_;
// A flag indicating whether automatic recovery from errors is enabled
bool auto_recovery_;
bool recovery_in_prog_;
Status OverrideNoSpaceError(Status bg_error, bool* auto_recovery);
void RecoverFromNoSpace();
};
}
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