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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 "BrokerContext.h"
#include "Core.h"
#include "MessageHolder.h"
#include "Multicaster.h"
#include "QueueContext.h"
#include "hash.h"
#include "qpid/framing/ClusterMessageEnqueueBody.h"
#include "qpid/framing/ClusterMessageRequeueBody.h"
#include "qpid/framing/ClusterWiringCreateQueueBody.h"
#include "qpid/framing/ClusterWiringCreateExchangeBody.h"
#include "qpid/framing/ClusterWiringDestroyQueueBody.h"
#include "qpid/framing/ClusterWiringDestroyExchangeBody.h"
#include "qpid/framing/ClusterWiringBindBody.h"
#include "qpid/framing/ClusterWiringUnbindBody.h"
#include "qpid/framing/ClusterQueueSubscribeBody.h"
#include "qpid/sys/Thread.h"
#include "qpid/broker/QueuedMessage.h"
#include "qpid/broker/Queue.h"
#include "qpid/broker/Exchange.h"
#include "qpid/framing/Buffer.h"
#include "qpid/log/Statement.h"
#include <boost/bind.hpp>
namespace qpid {
namespace cluster {
using namespace framing;
using namespace broker;
namespace {
const ProtocolVersion pv; // shorthand
// True means the current thread is handling a local event that should be replicated.
// False means we're handling a cluster event it should not be replicated.
QPID_TSS bool tssReplicate = true;
}
Multicaster& BrokerContext::mcaster(const broker::QueuedMessage& qm) {
return core.getGroup(hashof(qm)).getMulticaster();
}
Multicaster& BrokerContext::mcaster(const broker::Queue& q) {
return core.getGroup(hashof(q)).getMulticaster();
}
Multicaster& BrokerContext::mcaster(const std::string& name) {
return core.getGroup(hashof(name)).getMulticaster();
}
BrokerContext::ScopedSuppressReplication::ScopedSuppressReplication() {
assert(tssReplicate);
tssReplicate = false;
}
BrokerContext::ScopedSuppressReplication::~ScopedSuppressReplication() {
assert(!tssReplicate);
tssReplicate = true;
}
BrokerContext::BrokerContext(Core& c) : core(c) {}
BrokerContext::~BrokerContext() {}
namespace {
void sendFrame(Multicaster& mcaster, const AMQFrame& frame, uint16_t channel) {
AMQFrame copy(frame);
copy.setChannel(channel);
mcaster.mcast(copy);
}
}
bool BrokerContext::enqueue(Queue& queue, const boost::intrusive_ptr<Message>& msg)
{
if (!tssReplicate) return true;
Group& group = core.getGroup(hashof(queue));
MessageHolder::Channel channel =
group.getMessageHolder().sending(msg, queue.shared_from_this());
group.getMulticaster().mcast(ClusterMessageEnqueueBody(pv, queue.getName(), channel));
std::for_each(msg->getFrames().begin(), msg->getFrames().end(),
boost::bind(&sendFrame, boost::ref(mcaster(queue)), _1, channel));
msg->getIngressCompletion().startCompleter(); // Async completion
return false; // Strict order, wait for CPG self-delivery to enqueue.
}
// routing and routed are no-ops. They are needed to implement fanout
// optimization, which is currently not implemnted
void BrokerContext::routing(const boost::intrusive_ptr<broker::Message>&) {}
void BrokerContext::routed(const boost::intrusive_ptr<Message>&) {}
void BrokerContext::acquire(const broker::QueuedMessage& qm) {
if (tssReplicate) {
assert(!qm.queue->isConsumingStopped());
QueueContext::get(*qm.queue)->localAcquire(qm.position);
}
}
void BrokerContext::dequeue(const broker::QueuedMessage& qm) {
if (tssReplicate)
QueueContext::get(*qm.queue)->localDequeue(qm.position);
}
void BrokerContext::requeue(const broker::QueuedMessage& qm) {
if (tssReplicate)
mcaster(qm).mcast(ClusterMessageRequeueBody(
pv,
qm.queue->getName(),
qm.position,
qm.payload->getRedelivered()));
}
void BrokerContext::create(broker::Queue& q) {
if (!tssReplicate) return;
assert(!QueueContext::get(q));
new QueueContext(q, core.getGroup(q.getName()), core.getSettings().consumeTicks);
std::string data(q.encodedSize(), '\0');
framing::Buffer buf(&data[0], data.size());
q.encode(buf);
mcaster(q).mcast(ClusterWiringCreateQueueBody(pv, data));
// FIXME aconway 2011-07-29: Need asynchronous completion.
}
void BrokerContext::destroy(broker::Queue& q) {
if (!tssReplicate) return;
mcaster(q).mcast(ClusterWiringDestroyQueueBody(pv, q.getName()));
}
void BrokerContext::create(broker::Exchange& ex) {
if (!tssReplicate) return;
std::string data(ex.encodedSize(), '\0');
framing::Buffer buf(&data[0], data.size());
ex.encode(buf);
mcaster(ex.getName()).mcast(ClusterWiringCreateExchangeBody(pv, data));
}
void BrokerContext::destroy(broker::Exchange& ex) {
if (!tssReplicate) return;
mcaster(ex.getName()).mcast(
ClusterWiringDestroyExchangeBody(pv, ex.getName()));
}
void BrokerContext::bind(broker::Queue& q, broker::Exchange& ex,
const std::string& key, const framing::FieldTable& args)
{
if (!tssReplicate) return;
mcaster(q).mcast(ClusterWiringBindBody(pv, q.getName(), ex.getName(), key, args));
}
void BrokerContext::unbind(broker::Queue& q, broker::Exchange& ex,
const std::string& key, const framing::FieldTable& args)
{
if (!tssReplicate) return;
mcaster(q).mcast(ClusterWiringUnbindBody(pv, q.getName(), ex.getName(), key, args));
}
// n is the number of consumers including the one just added.
void BrokerContext::consume(broker::Queue& q, size_t n) {
QueueContext::get(q)->consume(n);
}
// n is the number of consumers after the cancel.
void BrokerContext::cancel(broker::Queue& q, size_t n) {
QueueContext::get(q)->cancel(n);
}
void BrokerContext::stopped(broker::Queue& q) {
QueueContext* qc = QueueContext::get(q);
// Don't forward the stopped call if the queue does not yet have a
// cluster context - this when the queue is first created locally.
if (qc) qc->stopped();
}
}} // namespace qpid::cluster
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