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
175
176
177
178
179
180
181
|
/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
#include "ConnectionImpl.h"
#include "SessionImpl.h"
#include "qpid/messaging/Session.h"
#include "qpid/client/PrivateImplRef.h"
#include "qpid/log/Statement.h"
#include <boost/intrusive_ptr.hpp>
namespace qpid {
namespace client {
namespace amqp0_10 {
using qpid::messaging::Variant;
using namespace qpid::sys;
template <class T> void setIfFound(const Variant::Map& map, const std::string& key, T& value)
{
Variant::Map::const_iterator i = map.find(key);
if (i != map.end()) {
value = (T) i->second;
}
}
void convert(const Variant::Map& from, ConnectionSettings& to)
{
setIfFound(from, "username", to.username);
setIfFound(from, "password", to.password);
setIfFound(from, "sasl-mechanism", to.mechanism);
setIfFound(from, "sasl-service", to.service);
setIfFound(from, "sasl-min-ssf", to.minSsf);
setIfFound(from, "sasl-max-ssf", to.maxSsf);
setIfFound(from, "heartbeat", to.heartbeat);
setIfFound(from, "tcp-nodelay", to.tcpNoDelay);
setIfFound(from, "locale", to.locale);
setIfFound(from, "max-channels", to.maxChannels);
setIfFound(from, "max-frame-size", to.maxFrameSize);
setIfFound(from, "bounds", to.bounds);
}
ConnectionImpl::ConnectionImpl(const std::string& u, const Variant::Map& options) :
url(u), reconnectionEnabled(true), timeout(-1),
minRetryInterval(1), maxRetryInterval(30)
{
QPID_LOG(debug, "Opening connection to " << url << " with " << options);
convert(options, settings);
setIfFound(options, "reconnection-enabled", reconnectionEnabled);
setIfFound(options, "reconnection-timeout", timeout);
setIfFound(options, "min-retry-interval", minRetryInterval);
setIfFound(options, "max-retry-interval", maxRetryInterval);
connection.open(url, settings);
}
void ConnectionImpl::close()
{
qpid::sys::Mutex::ScopedLock l(lock);
connection.close();
}
boost::intrusive_ptr<SessionImpl> getImplPtr(qpid::messaging::Session& session)
{
return boost::dynamic_pointer_cast<SessionImpl>(
qpid::client::PrivateImplRef<qpid::messaging::Session>::get(session)
);
}
void ConnectionImpl::closed(SessionImpl& s)
{
qpid::sys::Mutex::ScopedLock l(lock);
for (Sessions::iterator i = sessions.begin(); i != sessions.end(); ++i) {
if (getImplPtr(*i).get() == &s) {
sessions.erase(i);
break;
}
}
}
qpid::messaging::Session ConnectionImpl::newSession()
{
qpid::messaging::Session impl(new SessionImpl(*this));
{
qpid::sys::Mutex::ScopedLock l(lock);
sessions.push_back(impl);
}
try {
getImplPtr(impl)->setSession(connection.newSession());
} catch (const TransportFailure&) {
reconnect();
}
return impl;
}
void ConnectionImpl::reconnect()
{
AbsTime start = now();
ScopedLock<Semaphore> l(semaphore);
if (!connection.isOpen()) connect(start);
}
bool expired(const AbsTime& start, int timeout)
{
if (timeout == 0) return true;
if (timeout < 0) return false;
Duration used(start, now());
Duration allowed = timeout * TIME_SEC;
return allowed > used;
}
void ConnectionImpl::connect(const AbsTime& started)
{
for (int i = minRetryInterval; !tryConnect(); i = std::min(i * 2, maxRetryInterval)) {
if (expired(started, timeout)) throw TransportFailure();
else qpid::sys::sleep(i);
}
}
bool ConnectionImpl::tryConnect()
{
if (tryConnect(url) || tryConnect(connection.getKnownBrokers())) {
return resetSessions();
} else {
return false;
}
}
bool ConnectionImpl::tryConnect(const Url& u)
{
try {
QPID_LOG(info, "Trying to connect to " << url << "...");
connection.open(u, settings);
return true;
} catch (const Exception& e) {
//TODO: need to fix timeout on open so that it throws TransportFailure
QPID_LOG(info, "Failed to connect to " << u << ": " << e.what());
}
return false;
}
bool ConnectionImpl::tryConnect(const std::vector<Url>& urls)
{
for (std::vector<Url>::const_iterator i = urls.begin(); i != urls.end(); ++i) {
if (tryConnect(*i)) return true;
}
return false;
}
bool ConnectionImpl::resetSessions()
{
try {
qpid::sys::Mutex::ScopedLock l(lock);
for (Sessions::iterator i = sessions.begin(); i != sessions.end(); ++i) {
getImplPtr(*i)->setSession(connection.newSession());
}
return true;
} catch (const TransportFailure&) {
QPID_LOG(debug, "Connection failed while re-inialising sessions");
return false;
}
}
}}} // namespace qpid::client::amqp0_10
|
