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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
/**
* Copyright (C) 2009-2015 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 <string>
#include <vector>
#include "mongo/base/status_with.h"
#include "mongo/base/string_data.h"
#include "mongo/stdx/mutex.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/net/hostandport.h"
namespace mongo {
class DBClientBase;
/**
* ConnectionString handles parsing different ways to connect to mongo and determining method
* samples:
* server
* server:port
* foo/server:port,server:port SET
* server,server,server SYNC
* Warning - you usually don't want "SYNC", it's used
* for some special things such as sharding config servers.
* See syncclusterconnection.h for more info.
*
* Typical use:
*
* ConnectionString cs(uassertStatusOK(ConnectionString::parse(url)));
* std::string errmsg;
* DBClientBase * conn = cs.connect( errmsg );
*/
class ConnectionString {
public:
enum ConnectionType { INVALID, MASTER, SET, SYNC, CUSTOM };
ConnectionString() = default;
/**
* Constructs a connection string representing a replica set.
*/
static ConnectionString forReplicaSet(StringData setName, std::vector<HostAndPort> servers);
/**
* Creates a MASTER connection string with the specified server.
*/
explicit ConnectionString(const HostAndPort& server);
/**
* Creates a connection string from an unparsed list of servers, type, and setName.
*/
ConnectionString(ConnectionType type, const std::string& s, const std::string& setName);
/**
* Creates a connection string from a pre-parsed list of servers, type, and setName.
*/
ConnectionString(ConnectionType type,
std::vector<HostAndPort> servers,
const std::string& setName);
ConnectionString(const std::string& s, ConnectionType favoredMultipleType);
bool isValid() const {
return _type != INVALID;
}
const std::string& toString() const {
return _string;
}
const std::string& getSetName() const {
return _setName;
}
const std::vector<HostAndPort>& getServers() const {
return _servers;
}
ConnectionType type() const {
return _type;
}
/**
* This returns true if this and other point to the same logical entity.
* For single nodes, thats the same address.
* For replica sets, thats just the same replica set name.
* For pair (deprecated) or sync cluster connections, that's the same hosts in any ordering.
*/
bool sameLogicalEndpoint(const ConnectionString& other) const;
DBClientBase* connect(std::string& errmsg, double socketTimeout = 0) const;
static StatusWith<ConnectionString> parse(const std::string& url);
static std::string typeToString(ConnectionType type);
//
// Allow overriding the default connection behavior
// This is needed for some tests, which otherwise would fail because they are unable to contact
// the correct servers.
//
class ConnectionHook {
public:
virtual ~ConnectionHook() {}
// Returns an alternative connection object for a string
virtual DBClientBase* connect(const ConnectionString& c,
std::string& errmsg,
double socketTimeout) = 0;
};
static void setConnectionHook(ConnectionHook* hook) {
stdx::lock_guard<stdx::mutex> lk(_connectHookMutex);
_connectHook = hook;
}
static ConnectionHook* getConnectionHook() {
stdx::lock_guard<stdx::mutex> lk(_connectHookMutex);
return _connectHook;
}
// Allows ConnectionStrings to be stored more easily in sets/maps
bool operator<(const ConnectionString& other) const {
return _string < other._string;
}
private:
/**
* Creates a SET connection string with the specified set name and servers.
*/
ConnectionString(StringData setName, std::vector<HostAndPort> servers);
void _fillServers(std::string s);
void _finishInit();
ConnectionType _type{INVALID};
std::vector<HostAndPort> _servers;
std::string _string;
std::string _setName;
static stdx::mutex _connectHookMutex;
static ConnectionHook* _connectHook;
};
} // namespace mongo
|
