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
|
/**
* Copyright (C) 2012-2014 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 "mongo/base/string_data.h"
#include "mongo/db/catalog/database.h"
#include "mongo/db/namespace_string.h"
#include "mongo/util/string_map.h"
namespace mongo {
/**
* Registry of opened databases.
*/
class DatabaseHolder {
typedef StringMap<Database*> DBs;
// todo: we want something faster than this if called a lot:
mutable SimpleMutex _m;
DBs _dbs;
public:
DatabaseHolder() : _m("dbholder") { }
Database* get(OperationContext* txn,
const StringData& ns) const;
Database* getOrCreate(OperationContext* txn,
const StringData& ns,
bool& justCreated);
void close(OperationContext* txn, const StringData& ns);
/** @param force - force close even if something underway - use at shutdown */
bool closeAll(OperationContext* txn,
BSONObjBuilder& result,
bool force);
/**
* need some lock
*/
void getAllShortNames( std::set<std::string>& all ) const {
SimpleMutex::scoped_lock lk(_m);
for( DBs::const_iterator j=_dbs.begin(); j!=_dbs.end(); ++j ) {
all.insert( j->first );
}
}
private:
static StringData _todb( const StringData& ns ) {
StringData d = __todb( ns );
uassert(13280, "invalid db name: " + ns.toString(), NamespaceString::validDBName(d));
return d;
}
static StringData __todb( const StringData& ns ) {
size_t i = ns.find( '.' );
if ( i == std::string::npos ) {
uassert( 13074 , "db name can't be empty" , ns.size() );
return ns;
}
uassert( 13075 , "db name can't be empty" , i > 0 );
return ns.substr( 0 , i );
}
};
DatabaseHolder& dbHolder();
}
|
