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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
/*
*
* 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 "BackupConnectionExcluder.h"
#include "ConnectionObserver.h"
#include "HaBroker.h"
#include "IdSetter.h"
#include "Primary.h"
#include "QueueReplicator.h"
#include "ReplicatingSubscription.h"
#include "Settings.h"
#include "StandAlone.h"
#include "QueueSnapshot.h"
#include "qpid/amqp_0_10/Codecs.h"
#include "qpid/assert.h"
#include "qpid/Exception.h"
#include "qpid/broker/Broker.h"
#include "qpid/broker/BrokerObserver.h"
#include "qpid/broker/Link.h"
#include "qpid/broker/Queue.h"
#include "qpid/broker/SignalHandler.h"
#include "qpid/framing/FieldTable.h"
#include "qpid/management/ManagementAgent.h"
#include "qpid/sys/SystemInfo.h"
#include "qpid/types/Uuid.h"
#include "qpid/framing/Uuid.h"
#include "qmf/org/apache/qpid/ha/Package.h"
#include "qmf/org/apache/qpid/ha/ArgsHaBrokerReplicate.h"
#include "qmf/org/apache/qpid/ha/ArgsHaBrokerSetBrokersUrl.h"
#include "qmf/org/apache/qpid/ha/ArgsHaBrokerSetPublicUrl.h"
#include "qpid/log/Statement.h"
#include <boost/shared_ptr.hpp>
namespace qpid {
namespace ha {
namespace _qmf = ::qmf::org::apache::qpid::ha;
using namespace management;
using namespace std;
using types::Variant;
using types::Uuid;
using sys::Mutex;
using boost::shared_ptr;
using boost::dynamic_pointer_cast;
// In a HaBroker we always need to add QueueSnapshot and IdSetter to each queue
// because we don't know in advance which queues might be used for stand-alone
// replication.
//
// TODO aconway 2013-12-13: Can we restrict this to queues identified as replicated?
//
class HaBroker::BrokerObserver : public broker::BrokerObserver {
public:
BrokerObserver(const LogPrefix& lp) : logPrefix(lp) {}
void queueCreate(const boost::shared_ptr<broker::Queue>& q) {
q->getObservers().add(boost::shared_ptr<QueueSnapshot>(new QueueSnapshot));
q->getMessageInterceptors().add(
boost::shared_ptr<IdSetter>(new IdSetter(logPrefix, q->getName())));
}
private:
const LogPrefix& logPrefix;
};
// Called in Plugin::earlyInitialize
HaBroker::HaBroker(broker::Broker& b, const Settings& s)
: systemId(b.getSystem()->getSystemId().data()),
settings(s),
userId(s.username+"@"+b.getRealm()),
broker(b),
observer(new ConnectionObserver(*this, systemId)),
role(new StandAlone),
membership(BrokerInfo(systemId, STANDALONE), *this), // Sets logPrefix
failoverExchange(new FailoverExchange(*b.GetVhostObject(), b))
{
// If we are joining a cluster we must start excluding clients now,
// otherwise there's a window for a client to connect before we get to
// initialize()
if (settings.cluster) {
shared_ptr<broker::ConnectionObserver> excluder(new BackupConnectionExcluder(logPrefix));
observer->setObserver(excluder);
broker.getConnectionObservers().add(observer);
broker.getExchanges().registerExchange(failoverExchange);
}
broker.getBrokerObservers().add(boost::shared_ptr<BrokerObserver>(new BrokerObserver(logPrefix)));
}
namespace {
const std::string NONE("none");
bool isNone(const std::string& x) { return x.empty() || x == NONE; }
}
// Called in Plugin::initialize
void HaBroker::initialize() {
if (settings.cluster) {
QPID_LOG(info, logPrefix << "Starting HA broker");
membership.setStatus(JOINING);
}
// Set up the management object.
ManagementAgent* ma = broker.getManagementAgent();
if (settings.cluster && !ma)
throw Exception("Cannot start HA: management is disabled");
_qmf::Package packageInit(ma);
mgmtObject = _qmf::HaBroker::shared_ptr(new _qmf::HaBroker(ma, this, "ha-broker"));
mgmtObject->set_replicateDefault(settings.replicateDefault.str());
mgmtObject->set_systemId(systemId);
ma->addObject(mgmtObject);
membership.setMgmtObject(mgmtObject);
// Register a factory for replicating subscriptions.
broker.getConsumerFactories().add(
shared_ptr<ReplicatingSubscription::Factory>(
new ReplicatingSubscription::Factory(*this)));
// If we are in a cluster, start as backup in joining state.
if (settings.cluster) {
assert(membership.getStatus() == JOINING);
role.reset(new Backup(*this, settings));
broker.getKnownBrokers = boost::bind(&HaBroker::getKnownBrokers, this);
if (!isNone(settings.publicUrl)) setPublicUrl(Url(settings.publicUrl));
if (!isNone(settings.brokerUrl)) setBrokerUrl(Url(settings.brokerUrl));
}
}
HaBroker::~HaBroker() {
broker.getConnectionObservers().remove(observer);
}
Manageable::status_t HaBroker::ManagementMethod (uint32_t methodId, Args& args, string&) {
switch (methodId) {
case _qmf::HaBroker::METHOD_PROMOTE: {
Role* r = role->promote();
if (r) role.reset(r);
break;
}
case _qmf::HaBroker::METHOD_SETBROKERSURL: {
setBrokerUrl(Url(dynamic_cast<_qmf::ArgsHaBrokerSetBrokersUrl&>(args).i_url));
break;
}
case _qmf::HaBroker::METHOD_SETPUBLICURL: {
setPublicUrl(Url(dynamic_cast<_qmf::ArgsHaBrokerSetPublicUrl&>(args).i_url));
break;
}
case _qmf::HaBroker::METHOD_REPLICATE: {
_qmf::ArgsHaBrokerReplicate& bq_args =
dynamic_cast<_qmf::ArgsHaBrokerReplicate&>(args);
QPID_LOG(debug, logPrefix << "Replicate individual queue "
<< bq_args.i_queue << " from " << bq_args.i_broker);
shared_ptr<broker::Queue> queue = broker.getQueues().get(bq_args.i_queue);
Url url(bq_args.i_broker);
string protocol = url[0].protocol.empty() ? "tcp" : url[0].protocol;
Uuid uuid(true);
std::pair<broker::Link::shared_ptr, bool> result = broker.getLinks().declare(
broker::QPID_NAME_PREFIX + string("ha.link.") + uuid.str(),
url[0].host, url[0].port, protocol,
false, // durable
settings.mechanism, settings.username, settings.password,
false); // no amq.failover - don't want to use client URL.
shared_ptr<broker::Link> link = result.first;
link->setUrl(url);
// Create a queue replicator
shared_ptr<QueueReplicator> qr(QueueReplicator::create(*this, queue, link));
broker.getExchanges().registerExchange(qr);
break;
}
default:
return Manageable::STATUS_UNKNOWN_METHOD;
}
return Manageable::STATUS_OK;
}
void HaBroker::setPublicUrl(const Url& url) {
Mutex::ScopedLock l(lock);
publicUrl = url;
mgmtObject->set_publicUrl(url.str());
knownBrokers.clear();
knownBrokers.push_back(url);
vector<Url> urls(1, url);
failoverExchange->updateUrls(urls);
QPID_LOG(debug, logPrefix << "Public URL set to: " << url);
}
void HaBroker::setBrokerUrl(const Url& url) {
{
Mutex::ScopedLock l(lock);
brokerUrl = url;
mgmtObject->set_brokersUrl(brokerUrl.str());
QPID_LOG(info, logPrefix << "Brokers URL set to: " << url);
}
role->setBrokerUrl(url); // Oustside lock
}
std::vector<Url> HaBroker::getKnownBrokers() const {
Mutex::ScopedLock l(lock);
return knownBrokers;
}
void HaBroker::shutdown(const std::string& message) {
QPID_LOG(critical, logPrefix << "Shutting down: " << message);
broker.shutdown();
throw Exception(message);
}
BrokerStatus HaBroker::getStatus() const {
return membership.getStatus();
}
void HaBroker::setAddress(const Address& a) {
QPID_LOG(info, logPrefix << "Set self address to: " << a);
membership.setSelfAddress(a);
}
boost::shared_ptr<QueueReplicator> HaBroker::findQueueReplicator(const std::string& queueName) {
return boost::dynamic_pointer_cast<QueueReplicator>(
broker.getExchanges().find(QueueReplicator::replicatorName(queueName)));
}
}} // namespace qpid::ha
|
