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
123
124
125
126
127
128
129
130
131
132
133
134
135
|
// kv_catalog.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 <boost/scoped_ptr.hpp>
#include <boost/thread/mutex.hpp>
#include "mongo/base/string_data.h"
#include "mongo/db/catalog/collection_options.h"
#include "mongo/db/record_id.h"
#include "mongo/db/storage/bson_collection_catalog_entry.h"
namespace mongo {
class OperationContext;
class RecordStore;
class KVCatalog {
public:
/**
* @param rs - does NOT take ownership
*/
KVCatalog( RecordStore* rs,
bool isRsThreadSafe,
bool directoryPerDb,
bool directoryForIndexes );
~KVCatalog();
void init( OperationContext* opCtx );
void getAllCollections( std::vector<std::string>* out ) const;
/**
* @return error or ident for instance
*/
Status newCollection( OperationContext* opCtx,
const StringData& ns,
const CollectionOptions& options );
std::string getCollectionIdent( const StringData& ns ) const;
std::string getIndexIdent( OperationContext* opCtx,
const StringData& ns,
const StringData& idName ) const;
const BSONCollectionCatalogEntry::MetaData getMetaData( OperationContext* opCtx,
const StringData& ns );
void putMetaData( OperationContext* opCtx,
const StringData& ns,
BSONCollectionCatalogEntry::MetaData& md );
Status renameCollection( OperationContext* opCtx,
const StringData& fromNS,
const StringData& toNS,
bool stayTemp );
Status dropCollection( OperationContext* opCtx,
const StringData& ns );
std::vector<std::string> getAllIdentsForDB( const StringData& db ) const;
std::vector<std::string> getAllIdents( OperationContext* opCtx ) const;
bool isUserDataIdent( const StringData& ident ) const;
private:
class AddIdentChange;
class RemoveIdentChange;
BSONObj _findEntry( OperationContext* opCtx,
const StringData& ns,
RecordId* out=NULL ) const;
/**
* Generates a new unique identifier for a new "thing".
* @param ns - the containing ns
* @param kind - what this "thing" is, likely collection or index
*/
std::string _newUniqueIdent(const StringData& ns, const char* kind);
// Helpers only used by constructor and init(). Don't call from elsewhere.
static std::string _newRand();
bool _hasEntryCollidingWithRand() const;
RecordStore* _rs; // not owned
const bool _isRsThreadSafe;
const bool _directoryPerDb;
const bool _directoryForIndexes;
// These two are only used for ident generation inside _newUniqueIdent.
std::string _rand; // effectively const after init() returns
AtomicUInt64 _next;
struct Entry {
Entry(){}
Entry( std::string i, RecordId l )
: ident(i), storedLoc( l ) {}
std::string ident;
RecordId storedLoc;
};
typedef std::map<std::string,Entry> NSToIdentMap;
NSToIdentMap _idents;
mutable boost::mutex _identsLock;
};
}
|
