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
|
/* Copyright 2009 10gen 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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kNetwork
#include "mongo/platform/basic.h"
#include "mongo/client/connection_string.h"
#include <list>
#include <memory>
#include "mongo/client/dbclient_rs.h"
#include "mongo/client/mongo_uri.h"
#include "mongo/stdx/memory.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/log.h"
namespace mongo {
stdx::mutex ConnectionString::_connectHookMutex;
ConnectionString::ConnectionHook* ConnectionString::_connectHook = NULL;
std::unique_ptr<DBClientBase> ConnectionString::connect(StringData applicationName,
std::string& errmsg,
double socketTimeout,
const MongoURI* uri) const {
MongoURI newURI{};
if (uri) {
newURI = *uri;
}
switch (_type) {
case MASTER: {
for (const auto& server : _servers) {
auto c = stdx::make_unique<DBClientConnection>(true, 0, newURI);
c->setSoTimeout(socketTimeout);
LOG(1) << "creating new connection to:" << server;
if (!c->connect(server, applicationName, errmsg)) {
continue;
}
LOG(1) << "connected connection!";
return std::move(c);
}
return nullptr;
}
case SET: {
auto set = stdx::make_unique<DBClientReplicaSet>(
_setName, _servers, applicationName, socketTimeout, std::move(newURI));
if (!set->connect()) {
errmsg = "connect failed to replica set ";
errmsg += toString();
return nullptr;
}
return std::move(set);
}
case CUSTOM: {
// Lock in case other things are modifying this at the same time
stdx::lock_guard<stdx::mutex> lk(_connectHookMutex);
// Allow the replacement of connections with other connections - useful for testing.
uassert(16335,
"custom connection to " + this->toString() +
" specified with no connection hook",
_connectHook);
// Double-checked lock, since this will never be active during normal operation
auto replacementConn = _connectHook->connect(*this, errmsg, socketTimeout);
log() << "replacing connection to " << this->toString() << " with "
<< (replacementConn ? replacementConn->getServerAddress() : "(empty)");
return replacementConn;
}
case LOCAL:
case INVALID:
MONGO_UNREACHABLE;
}
MONGO_UNREACHABLE;
}
} // namepspace mongo
|
