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
|
/*
*
* 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 "Backup.h"
#include "Settings.h"
#include "BrokerReplicator.h"
#include "ReplicatingSubscription.h"
#include "ConnectionExcluder.h"
#include "qpid/Url.h"
#include "qpid/amqp_0_10/Codecs.h"
#include "qpid/broker/Bridge.h"
#include "qpid/broker/Broker.h"
#include "qpid/broker/SessionHandler.h"
#include "qpid/broker/Link.h"
#include "qpid/framing/AMQP_ServerProxy.h"
#include "qpid/framing/AMQFrame.h"
#include "qpid/framing/FieldTable.h"
#include "qpid/framing/MessageTransferBody.h"
#include "qpid/types/Variant.h"
namespace qpid {
namespace ha {
using namespace framing;
using namespace broker;
using types::Variant;
using std::string;
Backup::Backup(broker::Broker& b, const Settings& s) :
broker(b), settings(s), excluder(new ConnectionExcluder())
{
// Empty brokerUrl means delay initialization until setUrl() is called.
if (!s.brokerUrl.empty()) initialize(Url(s.brokerUrl));
}
void Backup::initialize(const Url& url) {
assert(!url.empty());
QPID_LOG(notice, "Ha: Backup started: " << url);
string protocol = url[0].protocol.empty() ? "tcp" : url[0].protocol;
// Declare the link
std::pair<Link::shared_ptr, bool> result = broker.getLinks().declare(
url[0].host, url[0].port, protocol,
false, // durable
settings.mechanism, settings.username, settings.password);
assert(result.second); // FIXME aconway 2011-11-23: error handling
link = result.first;
link->setUrl(url);
replicator.reset(new BrokerReplicator(link));
broker.getExchanges().registerExchange(replicator);
broker.getConnectionObservers().add(excluder);
}
void Backup::setBrokerUrl(const Url& url) {
// Ignore empty URLs seen during start-up for some tests.
if (url.empty()) return;
sys::Mutex::ScopedLock l(lock);
if (link) { // URL changed after we initialized.
QPID_LOG(info, "HA: Backup failover URL set to " << url);
link->setUrl(url);
}
else {
initialize(url); // Deferred initialization
}
}
Backup::~Backup() {
if (link) link->close();
if (replicator.get()) broker.getExchanges().destroy(replicator->getName());
broker.getConnectionObservers().remove(excluder); // This allows client connections.
}
}} // namespace qpid::ha
|
