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// lasterror.h
/* Copyright 2009 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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 <string>
#include "mongo/db/client.h"
#include "mongo/db/jsobj.h"
namespace mongo {
class BSONObjBuilder;
static const char kUpsertedFieldName[] = "upserted";
class LastError {
public:
static const Client::Decoration<LastError> get;
/**
* Resets the object to a newly constructed state. If "valid" is true, marks the last-error
* object as "valid".
*/
void reset(bool valid = false);
/**
* when db receives a message/request, call this
*/
void startRequest();
/**
* Disables error recording for the current operation.
*/
void disable();
/**
* Sets the error information for the current operation, if error recording was not
* explicitly disabled via a call to disable() since the call to startRequest.
*/
void setLastError(int code, std::string msg);
void recordUpdate(bool updateObjects, long long nObjects, BSONObj upsertedId);
void recordDelete(long long nDeleted);
/**
* Writes the last-error state described by this object to "b".
*
* If "blankErr" is true, the "err" field will be explicitly set to null in the result
* instead of being omitted when the error string is empty.
*
* Returns true if there is a non-empty error message.
*/
bool appendSelf(BSONObjBuilder& b, bool blankErr) const;
bool isValid() const {
return _valid;
}
int getNPrev() const {
return _nPrev;
}
class Disabled {
public:
explicit Disabled(LastError* le) : _le(le), _prev(le->_disabled) {
_le->_disabled = true;
}
~Disabled() {
_le->_disabled = _prev;
}
private:
LastError* const _le;
const bool _prev;
};
static LastError noError;
private:
enum UpdatedExistingType { NotUpdate, True, False };
int _code = 0;
std::string _msg = {};
UpdatedExistingType _updatedExisting = NotUpdate;
// _id field value from inserted doc, returned as kUpsertedFieldName (above)
BSONObj _upsertedId = {};
long long _nObjects = 0;
int _nPrev = 1;
bool _valid = false;
bool _disabled = false;
};
} // namespace mongo
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