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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 "qpid/broker/amqp/Topic.h"
#include "qpid/broker/Broker.h"
#include "qpid/management/ManagementAgent.h"
namespace _qmf = qmf::org::apache::qpid::broker;
namespace qpid {
namespace broker {
namespace amqp {
namespace {
const std::string TOPIC("topic");
const std::string EXCHANGE("exchange");
const std::string DURABLE("durable");
const std::string ALTERNATE_EXCHANGE("alternate-exchange");
const std::string EMPTY;
std::string getProperty(const std::string& k, const qpid::types::Variant::Map& m)
{
qpid::types::Variant::Map::const_iterator i = m.find(k);
if (i == m.end()) return EMPTY;
else return i->second;
}
bool testProperty(const std::string& k, const qpid::types::Variant::Map& m)
{
qpid::types::Variant::Map::const_iterator i = m.find(k);
if (i == m.end()) return false;
else return i->second;
}
qpid::types::Variant::Map filter(const qpid::types::Variant::Map& properties, bool queue)
{
qpid::types::Variant::Map filtered = properties;
filtered.erase(DURABLE);
filtered.erase(EXCHANGE);
if (queue) filtered.erase(ALTERNATE_EXCHANGE);
return filtered;
}
}
Topic::Topic(Broker& broker, const std::string& n, boost::shared_ptr<Exchange> e, const qpid::types::Variant::Map& properties)
: PersistableObject(n, TOPIC, properties), name(n), durable(testProperty(DURABLE, properties)), exchange(e),
alternateExchange(getProperty(ALTERNATE_EXCHANGE, properties))
{
if (exchange->getName().empty()) throw qpid::Exception("Exchange must be specified.");
if (durable && !exchange->isDurable()) throw qpid::Exception("Durable topic must be backed by durable exchange");
qpid::types::Variant::Map unused;
qpid::types::Variant::Map filtered = filter(properties, true);
policy.populate(filtered, unused);
qpid::management::ManagementAgent* agent = broker.getManagementAgent();
if (agent != 0) {
topic = _qmf::Topic::shared_ptr(new _qmf::Topic(agent, this, name, exchange->GetManagementObject()->getObjectId(), durable));
topic->set_properties(filter(properties, false));
agent->addObject(topic);
}
}
bool Topic::isDurable() const
{
return durable;
}
Topic::~Topic()
{
if (topic != 0) topic->resourceDestroy();
}
boost::shared_ptr<qpid::management::ManagementObject> Topic::GetManagementObject() const
{
return topic;
}
const QueueSettings& Topic::getPolicy() const
{
return policy;
}
boost::shared_ptr<Exchange> Topic::getExchange()
{
return exchange;
}
const std::string& Topic::getName() const
{
return name;
}
const std::string& Topic::getAlternateExchange() const
{
return alternateExchange;
}
boost::shared_ptr<Topic> TopicRegistry::createTopic(Broker& broker, const std::string& name, boost::shared_ptr<Exchange> exchange, const qpid::types::Variant::Map& properties)
{
boost::shared_ptr<Topic> topic(new Topic(broker, name, exchange, properties));
add(topic);
topic->getExchange()->setDeletionListener(name, boost::bind(&TopicRegistry::remove, this, name));
return topic;
}
boost::shared_ptr<Topic> TopicRegistry::declare(Broker& broker, const std::string& name, boost::shared_ptr<Exchange> exchange, const qpid::types::Variant::Map& properties)
{
qpid::sys::Mutex::ScopedLock l(lock);
Topics::const_iterator i = topics.find(name);
if (i == topics.end()) {
boost::shared_ptr<Topic> topic(new Topic(broker, name, exchange, properties));
topics.insert(Topics::value_type(name, topic));
topic->getExchange()->setDeletionListener(name, boost::bind(&TopicRegistry::remove, this, name));
return topic;
} else {
return i->second;
}
}
bool TopicRegistry::createObject(Broker& broker, const std::string& type, const std::string& name, const qpid::types::Variant::Map& props,
const std::string& /*userId*/, const std::string& /*connectionId*/)
{
if (type == TOPIC) {
boost::shared_ptr<Topic> topic = createTopic(broker, name, broker.getExchanges().get(getProperty(EXCHANGE, props)), props);
if (topic->isDurable()) broker.getStore().create(*topic);
return true;
} else {
return false;
}
}
bool TopicRegistry::deleteObject(Broker& broker, const std::string& type, const std::string& name, const qpid::types::Variant::Map& /*properties*/,
const std::string& /*userId*/, const std::string& /*connectionId*/)
{
if (type == TOPIC) {
boost::shared_ptr<Topic> topic = remove(name);
if (topic) {
if (topic->isDurable()) broker.getStore().destroy(*topic);
return true;
} else {
return false;
}
} else {
return false;
}
}
bool TopicRegistry::recoverObject(Broker& broker, const std::string& type, const std::string& name, const qpid::types::Variant::Map& properties,
uint64_t persistenceId)
{
if (type == TOPIC) {
boost::shared_ptr<Topic> topic = createTopic(broker, name, broker.getExchanges().get(getProperty(EXCHANGE, properties)), properties);
topic->setPersistenceId(persistenceId);
return true;
} else {
return false;
}
}
bool TopicRegistry::add(boost::shared_ptr<Topic> topic)
{
qpid::sys::Mutex::ScopedLock l(lock);
Topics::const_iterator i = topics.find(topic->getName());
if (i == topics.end()) {
topics.insert(Topics::value_type(topic->getName(), topic));
return true;
} else {
throw qpid::types::Exception(QPID_MSG("A topic named " << topic->getName() << " already exists"));
}
}
boost::shared_ptr<Topic> TopicRegistry::remove(const std::string& name)
{
boost::shared_ptr<Topic> result;
qpid::sys::Mutex::ScopedLock l(lock);
Topics::iterator i = topics.find(name);
if (i != topics.end()) {
result = i->second;
topics.erase(i);
result->getExchange()->unsetDeletionListener(name);
}
return result;
}
boost::shared_ptr<Topic> TopicRegistry::get(const std::string& name)
{
qpid::sys::Mutex::ScopedLock l(lock);
Topics::const_iterator i = topics.find(name);
if (i == topics.end()) {
return boost::shared_ptr<Topic>();
} else {
return i->second;
}
}
}}} // namespace qpid::broker::amqp
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