1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
// kv_storage_engine.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 <map>
#include <string>
#include "mongo/db/storage/kv/kv_catalog.h"
#include "mongo/db/storage/record_store.h"
#include "mongo/db/storage/storage_engine.h"
#include "mongo/stdx/mutex.h"
namespace mongo {
class KVCatalog;
class KVEngine;
class KVDatabaseCatalogEntry;
struct KVStorageEngineOptions {
KVStorageEngineOptions()
: directoryPerDB(false), directoryForIndexes(false), forRepair(false) {}
bool directoryPerDB;
bool directoryForIndexes;
bool forRepair;
};
class KVStorageEngine : public StorageEngine {
public:
/**
* @param engine - owneership passes to me
*/
KVStorageEngine(KVEngine* engine,
const KVStorageEngineOptions& options = KVStorageEngineOptions());
virtual ~KVStorageEngine();
virtual void finishInit();
virtual RecoveryUnit* newRecoveryUnit();
virtual void listDatabases(std::vector<std::string>* out) const;
virtual DatabaseCatalogEntry* getDatabaseCatalogEntry(OperationContext* opCtx, StringData db);
virtual bool supportsDocLocking() const {
return _supportsDocLocking;
}
virtual Status closeDatabase(OperationContext* txn, StringData db);
virtual Status dropDatabase(OperationContext* txn, StringData db);
virtual int flushAllFiles(bool sync);
virtual bool isDurable() const;
virtual Status repairRecordStore(OperationContext* txn, const std::string& ns);
virtual void cleanShutdown();
// ------ kv ------
KVEngine* getEngine() {
return _engine.get();
}
const KVEngine* getEngine() const {
return _engine.get();
}
KVCatalog* getCatalog() {
return _catalog.get();
}
const KVCatalog* getCatalog() const {
return _catalog.get();
}
private:
class RemoveDBChange;
KVStorageEngineOptions _options;
// This must be the first member so it is destroyed last.
std::unique_ptr<KVEngine> _engine;
const bool _supportsDocLocking;
std::unique_ptr<RecordStore> _catalogRecordStore;
std::unique_ptr<KVCatalog> _catalog;
typedef std::map<std::string, KVDatabaseCatalogEntry*> DBMap;
DBMap _dbs;
mutable stdx::mutex _dbsLock;
};
}
|
