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// wiredtiger_util.h
/**
* Copyright (C) 2014 MongoDB 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 <wiredtiger.h>
#include "mongo/base/disallow_copying.h"
#include "mongo/base/status.h"
#include "mongo/db/concurrency/write_conflict_exception.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/mongoutils/str.h"
#include "mongo/util/stacktrace.h"
namespace mongo {
class BSONObjBuilder;
inline bool wt_keeptxnopen() {
return false;
}
/**
* converts wiredtiger return codes to mongodb statuses.
*/
inline Status wtRCToStatus(int retCode) {
if (MONGO_likely(retCode == 0))
return Status::OK();
if ( retCode == WT_ROLLBACK ) {
//printStackTrace();
throw WriteConflictException();
}
// TODO convert specific codes rather than just using UNKNOWN_ERROR for everything.
return Status(ErrorCodes::UnknownError,
str::stream() << retCode << ": " << wiredtiger_strerror(retCode));
}
inline void invariantWTOK(int retCode) {
if (MONGO_likely(retCode == 0))
return;
fassertFailedWithStatus(28519, wtRCToStatus(retCode));
}
struct WiredTigerItem : public WT_ITEM {
WiredTigerItem(const void *d, size_t s) {
data = d;
size = s;
}
WiredTigerItem(const std::string &str) {
data = str.c_str();
size = str.size();
}
// NOTE: do not call Get() on a temporary.
// The pointer returned by Get() must not be allowed to live longer than *this.
WT_ITEM *Get() { return this; }
const WT_ITEM *Get() const { return this; }
};
class WiredTigerUtil {
MONGO_DISALLOW_COPYING(WiredTigerUtil);
private:
WiredTigerUtil();
public:
/**
* Reads contents of table using URI and exports all keys to BSON as string elements.
* Additional, adds 'uri' field to output document.
*/
static Status exportTableToBSON(WT_SESSION* s,
const std::string& uri, const std::string& config,
BSONObjBuilder* bob);
static int64_t getIdentSize(WT_SESSION* s,
const std::string& uri );
};
class WiredTigerConfigParser {
MONGO_DISALLOW_COPYING(WiredTigerConfigParser);
public:
WiredTigerConfigParser(const StringData& config) {
invariantWTOK(wiredtiger_config_parser_open(NULL, config.rawData(), config.size(),
&_parser));
}
WiredTigerConfigParser(const WT_CONFIG_ITEM& nested) {
invariant(nested.type == WT_CONFIG_ITEM::WT_CONFIG_ITEM_STRUCT);
invariantWTOK(wiredtiger_config_parser_open(NULL, nested.str, nested.len, &_parser));
}
~WiredTigerConfigParser() {
invariantWTOK(_parser->close(_parser));
}
int next(WT_CONFIG_ITEM* key, WT_CONFIG_ITEM* value) {
return _parser->next(_parser, key, value);
}
int get(const char* key, WT_CONFIG_ITEM* value) {
return _parser->get(_parser, key, value);
}
private:
WT_CONFIG_PARSER* _parser;
};
}
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