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/*
*
* 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 "Primary.h"
#include "QueueReplicator.h"
#include "ReplicatingSubscription.h"
#include "Settings.h"
#include "StandAlone.h"
#include "qpid/amqp_0_10/Codecs.h"
#include "qpid/Exception.h"
#include "qpid/broker/Broker.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;
// Called in Plugin::earlyInitialize
HaBroker::HaBroker(broker::Broker& b, const Settings& s)
: systemId(b.getSystem()->getSystemId().data()),
settings(s),
broker(b),
observer(new ConnectionObserver(*this, systemId)),
role(new StandAlone),
membership(BrokerInfo(systemId, STANDALONE), *this)
{
// 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) {
QPID_LOG(debug, "Broker startup, rejecting client connections.");
shared_ptr<broker::ConnectionObserver> excluder(new BackupConnectionExcluder);
observer->setObserver(excluder, "Backup: ");
broker.getConnectionObservers().add(observer);
}
}
namespace {
const std::string NONE("none");
bool isNone(const std::string& x) { return x.empty() || x == NONE; }
}
// Called in Plugin::initialize
void HaBroker::initialize() {
// FIXME aconway 2012-07-19: assumes there's a TCP transport with a meaningful port.
membership.add(
BrokerInfo(
membership.getSelf(),
settings.cluster ? JOINING : membership.getStatus(),
broker.getSystem()->getNodeName(),
broker.getPort(broker::Broker::TCP_TRANSPORT)
)
);
QPID_LOG(notice, "Initializing: " << membership.getInfo());
// 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()));
// 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() {
QPID_LOG(notice, role->getLogPrefix() << "Shut down");
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, role->getLogPrefix() << "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(
new QueueReplicator(*this, queue, link));
qr->activate();
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);
QPID_LOG(debug, role->getLogPrefix() << "Setting public URL to: " << url);
}
void HaBroker::setBrokerUrl(const Url& url) {
{
Mutex::ScopedLock l(lock);
brokerUrl = url;
mgmtObject->set_brokersUrl(brokerUrl.str());
QPID_LOG(info, role->getLogPrefix() << "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, message);
broker.shutdown();
throw Exception(message);
}
BrokerStatus HaBroker::getStatus() const {
return membership.getStatus();
}
}} // namespace qpid::ha
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