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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 "BrokerHandler.h"
#include "qpid/framing/ClusterMessageRoutingBody.h"
#include "qpid/framing/ClusterMessageRoutedBody.h"
#include "qpid/framing/ClusterMessageEnqueueBody.h"
#include "qpid/sys/Thread.h"
#include "qpid/broker/QueuedMessage.h"
#include "qpid/broker/Queue.h"
#include "qpid/framing/Buffer.h"
#include "qpid/log/Statement.h"
namespace qpid {
namespace cluster {
using namespace framing;
using namespace broker;
namespace {
// noReplicate means the current thread is handling a message
// received from the cluster so it should not be replciated.
QPID_TSS bool noReplicate = false;
// Sequence number of the message currently being routed.
// 0 if we are not currently routing a message.
QPID_TSS SequenceNumber routeSeq = 0;
}
BrokerHandler::ScopedSuppressReplication::ScopedSuppressReplication() {
assert(!noReplicate);
noReplicate = true;
}
BrokerHandler::ScopedSuppressReplication::~ScopedSuppressReplication() {
assert(noReplicate);
noReplicate = false;
}
BrokerHandler::BrokerHandler(Core& c) : core(c) {}
SequenceNumber BrokerHandler::nextSequenceNumber() {
SequenceNumber s = ++sequence;
if (!s) s = ++sequence; // Avoid 0 on wrap-around.
return s;
}
void BrokerHandler::routing(const boost::intrusive_ptr<Message>&) { }
bool BrokerHandler::enqueue(Queue& queue, const boost::intrusive_ptr<Message>& msg)
{
if (noReplicate) return true;
if (!routeSeq) { // This is the first enqueue, so send the message
routeSeq = nextSequenceNumber();
// FIXME aconway 2010-10-20: replicate message in fixed size buffers.
std::string data(msg->encodedSize(),char());
framing::Buffer buf(&data[0], data.size());
msg->encode(buf);
core.mcast(ClusterMessageRoutingBody(ProtocolVersion(), routeSeq, data));
core.getRoutingMap().put(routeSeq, msg);
}
core.mcast(ClusterMessageEnqueueBody(ProtocolVersion(), routeSeq, queue.getName()));
// TODO aconway 2010-10-21: configable option for strict (wait
// for CPG deliver to do local deliver) vs. loose (local deliver
// immediately).
return false;
}
void BrokerHandler::routed(const boost::intrusive_ptr<Message>&) {
if (routeSeq) { // we enqueued at least one message.
core.mcast(ClusterMessageRoutedBody(ProtocolVersion(), routeSeq));
// Note: routingMap is cleaned up on CPG delivery in MessageHandler.
routeSeq = 0;
}
}
}} // namespace qpid::cluster
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