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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 "Core.h"
#include "MessageHandler.h"
#include "BrokerContext.h"
#include "QueueContext.h"
#include "EventHandler.h"
#include "PrettyId.h"
#include "qpid/broker/Message.h"
#include "qpid/broker/Broker.h"
#include "qpid/broker/QueueRegistry.h"
#include "qpid/broker/Queue.h"
#include "qpid/framing/AllInvoker.h"
#include "qpid/framing/Buffer.h"
#include "qpid/sys/Thread.h"
#include "qpid/log/Statement.h"
#include <boost/shared_ptr.hpp>
namespace qpid {
namespace cluster {
using namespace broker;
MessageHandler::MessageHandler(EventHandler& e, Core& c) :
HandlerBase(e),
broker(c.getBroker()),
core(c)
{}
bool MessageHandler::invoke(const framing::AMQBody& body) {
return framing::invoke(*this, body).wasHandled();
}
boost::shared_ptr<broker::Queue> MessageHandler::findQueue(
const std::string& q, const char* msg)
{
boost::shared_ptr<Queue> queue = broker.getQueues().find(q);
if (!queue) throw Exception(QPID_MSG(msg << ": unknown queue " << q));
return queue;
}
void MessageHandler::enqueue(const std::string& q, const std::string& message) {
boost::shared_ptr<Queue> queue = findQueue(q, "Cluster enqueue failed");
// FIXME aconway 2010-10-28: decode message by frame in bounded-size buffers.
// FIXME aconway 2011-09-28: don't re-decode my own messages
boost::intrusive_ptr<broker::Message> msg = new broker::Message();
framing::Buffer buf(const_cast<char*>(&message[0]), message.size());
msg->decodeHeader(buf);
msg->decodeContent(buf);
BrokerContext::ScopedSuppressReplication ssr;
queue->deliver(msg);
}
// FIXME aconway 2011-09-14: performance: pack acquires into a SequenceSet
// and scan queue once.
void MessageHandler::acquire(const std::string& q, uint32_t position) {
// FIXME aconway 2011-09-15: systematic logging across cluster module.
QPID_LOG(trace, "cluster message " << q << "[" << position
<< "] acquired by " << PrettyId(sender(), self()));
// Note acquires from other members. My own acquires were executed in
// the connection thread
if (sender() != self()) {
boost::shared_ptr<Queue> queue = findQueue(q, "Cluster acquire failed");
QueuedMessage qm;
BrokerContext::ScopedSuppressReplication ssr;
if (!queue->acquireMessageAt(position, qm))
throw Exception(QPID_MSG("Cluster acquire: message not found: "
<< q << "[" << position << "]"));
assert(qm.position.getValue() == position);
assert(qm.payload);
// Save on context for possible requeue if released/rejected.
QueueContext::get(*queue)->acquire(qm);
// FIXME aconway 2011-09-19: need to record by member-ID to
// requeue if member leaves.
}
}
void MessageHandler::dequeue(const std::string& q, uint32_t position) {
// FIXME aconway 2011-09-15: systematic logging across cluster module.
QPID_LOG(trace, "cluster message " << q << "[" << position
<< "] dequeued by " << PrettyId(sender(), self()));
// FIXME aconway 2010-10-28: for local dequeues, we should
// complete the ack that initiated the dequeue at this point, see
// BrokerContext::dequeue
// My own dequeues were processed in the connection thread before multicasting.
if (sender() != self()) {
boost::shared_ptr<Queue> queue = findQueue(q, "Cluster dequeue failed");
QueuedMessage qm = QueueContext::get(*queue)->dequeue(position);
BrokerContext::ScopedSuppressReplication ssr;
if (qm.queue) queue->dequeue(0, qm);
}
}
void MessageHandler::requeue(const std::string& q, uint32_t position, bool redelivered) {
if (sender() != self()) {
boost::shared_ptr<Queue> queue = findQueue(q, "Cluster requeue failed");
QueueContext::get(*queue)->requeue(position, redelivered);
}
}
}} // namespace qpid::cluster
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