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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/QueueFactory.h"
#include "qpid/broker/Broker.h"
#include "qpid/broker/QueueSettings.h"
#include "qpid/broker/Queue.h"
#include "qpid/broker/LossyQueue.h"
#include "qpid/broker/Lvq.h"
#include "qpid/broker/Messages.h"
#include "qpid/broker/MessageDistributor.h"
#include "qpid/broker/MessageGroupManager.h"
#include "qpid/broker/Fairshare.h"
#include "qpid/broker/MessageDeque.h"
#include "qpid/broker/MessageMap.h"
#include "qpid/broker/PagedQueue.h"
#include "qpid/broker/PriorityQueue.h"
#include "qpid/broker/QueueFlowLimit.h"
#include "qpid/broker/SelfDestructQueue.h"
#include "qpid/broker/ThresholdAlerts.h"
#include "qpid/broker/FifoDistributor.h"
#include "qpid/log/Statement.h"
#include <map>
#include <memory>
namespace qpid {
namespace broker {
QueueFactory::QueueFactory() : broker(0), store(0), parent(0) {}
boost::shared_ptr<Queue> QueueFactory::create(const std::string& name, const QueueSettings& settings)
{
settings.validate();
boost::shared_ptr<QueueFlowLimit> flow_ptr(QueueFlowLimit::createLimit(name, settings));
//1. determine Queue type (i.e. whether we are subclassing Queue)
// -> if 'ring' policy is in use then subclass
boost::shared_ptr<Queue> queue;
if (settings.dropMessagesAtLimit) {
queue = boost::shared_ptr<Queue>(new LossyQueue(name, settings, settings.durable ? store : 0, parent, broker));
} else if (settings.selfDestructAtLimit) {
queue = boost::shared_ptr<Queue>(new SelfDestructQueue(name, settings, settings.durable ? store : 0, parent, broker));
} else if (settings.lvqKey.size()) {
std::auto_ptr<MessageMap> map(new MessageMap(settings.lvqKey));
queue = boost::shared_ptr<Queue>(new Lvq(name, map, settings, settings.durable ? store : 0, parent, broker));
} else {
queue = boost::shared_ptr<Queue>(new Queue(name, settings, settings.durable ? store : 0, parent, broker));
}
//2. determine Messages type (i.e. structure)
if (settings.priorities) {
if (settings.defaultFairshare || settings.fairshare.size()) {
queue->messages = Fairshare::create(settings);
} else {
queue->messages = std::auto_ptr<Messages>(new PriorityQueue(settings.priorities));
}
} else if (settings.paging) {
if (!broker) {
QPID_LOG(warning, "Cannot create paged queue without broker context");
} else if (!qpid::sys::MemoryMappedFile::isSupported()) {
QPID_LOG(warning, "Cannot create paged queue; memory mapped file support not available on this platform");
} else {
queue->messages = std::auto_ptr<Messages>(new PagedQueue(name, broker->getPagingDirectoryPath(),
settings.maxPages ? settings.maxPages : 4,
settings.pageFactor ? settings.pageFactor : 1,
broker->getProtocolRegistry(), broker->getExpiryPolicy()));
}
} else if (settings.lvqKey.empty()) {//LVQ already handled above
queue->messages = std::auto_ptr<Messages>(new MessageDeque());
}
//3. determine MessageDistributor type
if (settings.groupKey.size()) {
boost::shared_ptr<MessageGroupManager> mgm(MessageGroupManager::create( name, *(queue->messages), settings));
queue->allocator = mgm;
queue->getObservers().add(mgm);
} else {
queue->allocator = boost::shared_ptr<MessageDistributor>(new FifoDistributor( *(queue->messages) ));
}
//4. threshold event config
if (broker && broker->getManagementAgent()) {
ThresholdAlerts::observe(*queue, *(broker->getManagementAgent()), settings, broker->getOptions().queueThresholdEventRatio);
}
//5. flow control config
if (flow_ptr) {
flow_ptr->observe(*queue);
}
return queue;
}
void QueueFactory::setBroker(Broker* b)
{
broker = b;
}
Broker* QueueFactory::getBroker()
{
return broker;
}
void QueueFactory::setStore (MessageStore* s)
{
store = s;
}
MessageStore* QueueFactory::getStore() const
{
return store;
}
void QueueFactory::setParent(management::Manageable* p)
{
parent = p;
}
}} // namespace qpid::broker
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