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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 "FailoverExchange.h"
#include "Event.h"
#include "qpid/broker/amqp_0_10/MessageTransfer.h"
#include "qpid/broker/Message.h"
#include "qpid/broker/DeliverableMessage.h"
#include "qpid/broker/Queue.h"
#include "qpid/framing/MessageProperties.h"
#include "qpid/framing/AMQFrame.h"
#include "qpid/framing/AMQHeaderBody.h"
#include "qpid/framing/MessageTransferBody.h"
#include "qpid/log/Statement.h"
#include "qpid/framing/Array.h"
#include "qpid/RefCounted.h"
#include "qpid/UrlArray.h"
#include <boost/bind.hpp>
#include <algorithm>
namespace qpid {
namespace ha {
using namespace std;
using namespace broker;
using namespace framing;
using broker::amqp_0_10::MessageTransfer;
const string FailoverExchange::typeName("amq.failover");
namespace {
struct OstreamUrls {
OstreamUrls(const FailoverExchange::Urls& u) : urls(u) {}
FailoverExchange::Urls urls;
};
ostream& operator<<(ostream& o, const OstreamUrls& urls) {
ostream_iterator<qpid::Url> out(o, " ");
copy(urls.urls.begin(), urls.urls.end(), out);
return o;
}
}
FailoverExchange::FailoverExchange(management::Manageable& parent, Broker& b)
: Exchange(typeName, &parent, &b)
{
QPID_LOG(debug, typeName << " created.");
if (mgmtExchange != 0)
mgmtExchange->set_type(typeName);
}
void FailoverExchange::setUrls(const vector<Url>& u) {
QPID_LOG(debug, typeName << " URLs set to " << OstreamUrls(u));
Lock l(lock);
urls = u;
}
void FailoverExchange::updateUrls(const vector<Url>& u) {
QPID_LOG(debug, typeName << " Updating URLs " << OstreamUrls(u) << " to "
<< queues.size() << " subscribers.");
Lock l(lock);
urls=u;
if (!urls.empty() && !queues.empty()) {
for (Queues::const_iterator i = queues.begin(); i != queues.end(); ++i)
sendUpdate(*i, l);
}
}
string FailoverExchange::getType() const { return typeName; }
bool FailoverExchange::bind(Queue::shared_ptr queue, const string&,
const framing::FieldTable*) {
QPID_LOG(debug, typeName << " binding " << queue->getName());
Lock l(lock);
sendUpdate(queue, l);
return queues.insert(queue).second;
}
bool FailoverExchange::unbind(Queue::shared_ptr queue, const string&,
const framing::FieldTable*) {
QPID_LOG(debug, typeName << " un-binding " << queue->getName());
Lock l(lock);
return queues.erase(queue);
}
bool FailoverExchange::isBound(Queue::shared_ptr queue, const string* const,
const framing::FieldTable*) {
Lock l(lock);
return queues.find(queue) != queues.end();
}
void FailoverExchange::route(Deliverable&) {
QPID_LOG(warning, "Message received by exchange " << typeName << " ignoring");
}
void FailoverExchange::sendUpdate(const Queue::shared_ptr& queue, sys::Mutex::ScopedLock&) {
QPID_LOG(debug, typeName << " sending " << OstreamUrls(urls) << " to " << queue->getName());
if (urls.empty()) return;
framing::Array array = vectorToUrlArray(urls);
const ProtocolVersion v;
broker::Message message(makeMessage(std::string(), typeName, typeName));
MessageTransfer& transfer = MessageTransfer::get(message);
MessageProperties* props =
transfer.getFrames().getHeaders()->get<framing::MessageProperties>(true);
props->setContentLength(0);
props->getApplicationHeaders().setArray(typeName, array);
DeliverableMessage(message, 0).deliverTo(queue);
}
}} // namespace ha
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