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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 "BrokerContext.h"
#include "QueueContext.h"
#include "QueueHandler.h"
#include "qpid/framing/ClusterMessageRoutingBody.h"
#include "qpid/framing/ClusterMessageRoutedBody.h"
#include "qpid/framing/ClusterMessageEnqueueBody.h"
#include "qpid/framing/ClusterMessageAcquireBody.h"
#include "qpid/framing/ClusterMessageDequeueBody.h"
#include "qpid/framing/ClusterMessageReleaseBody.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"
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 tssNoReplicate = false;
// Routing ID of the message being routed in the current thread.
// 0 if we are not currently routing a message.
QPID_TSS RoutingId tssRoutingId = 0;
}
BrokerContext::ScopedSuppressReplication::ScopedSuppressReplication() {
assert(!tssNoReplicate);
tssNoReplicate = true;
}
BrokerContext::ScopedSuppressReplication::~ScopedSuppressReplication() {
assert(tssNoReplicate);
tssNoReplicate = false;
}
BrokerContext::BrokerContext(Core& c, boost::intrusive_ptr<QueueHandler> q)
: core(c), queueHandler(q) {}
RoutingId BrokerContext::nextRoutingId() {
RoutingId id = ++routingId;
if (id == 0) id = ++routingId; // Avoid 0 on wrap-around.
return id;
}
void BrokerContext::routing(const boost::intrusive_ptr<Message>&) { }
bool BrokerContext::enqueue(Queue& queue, const boost::intrusive_ptr<Message>& msg)
{
if (tssNoReplicate) return true;
if (!tssRoutingId) { // This is the first enqueue, so send the message
tssRoutingId = nextRoutingId();
// 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(), tssRoutingId, data));
core.getRoutingMap().put(tssRoutingId, msg);
}
core.mcast(ClusterMessageEnqueueBody(ProtocolVersion(), tssRoutingId, 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 BrokerContext::routed(const boost::intrusive_ptr<Message>&) {
if (tssRoutingId) { // we enqueued at least one message.
core.mcast(ClusterMessageRoutedBody(ProtocolVersion(), tssRoutingId));
// Note: routingMap is cleaned up on CPG delivery in MessageHandler.
tssRoutingId = 0;
}
}
void BrokerContext::acquire(const broker::QueuedMessage& qm) {
if (tssNoReplicate) return;
core.mcast(ClusterMessageAcquireBody(
ProtocolVersion(), qm.queue->getName(), qm.position));
}
// FIXME aconway 2011-05-24: need to handle acquire and release.
// Dequeue in the wrong place?
void BrokerContext::dequeue(const broker::QueuedMessage& qm) {
if (tssNoReplicate) return;
core.mcast(ClusterMessageDequeueBody(
ProtocolVersion(), qm.queue->getName(), qm.position));
}
void BrokerContext::release(const broker::QueuedMessage& ) {
// FIXME aconway 2011-05-24: TODO
}
// FIXME aconway 2011-06-08: should be be using shared_ptr to q here?
void BrokerContext::create(broker::Queue& q) {
if (tssNoReplicate) return; // FIXME aconway 2011-06-08: revisit
// FIXME aconway 2011-06-08: error handling- if already set...
// Create local context immediately, queue will be stopped until replicated.
boost::intrusive_ptr<QueueContext> context(
new QueueContext(q,core.getMulticaster()));
std::string data(q.encodedSize(), '\0');
framing::Buffer buf(&data[0], data.size());
q.encode(buf);
core.mcast(ClusterWiringCreateQueueBody(ProtocolVersion(), data));
QPID_LOG(critical, "FIXME BrokerContext create " << q.getName() << q.getClusterContext().get());
}
void BrokerContext::destroy(broker::Queue& q) {
if (tssNoReplicate) return;
core.mcast(ClusterWiringDestroyQueueBody(ProtocolVersion(), q.getName()));
}
void BrokerContext::create(broker::Exchange& ex) {
if (tssNoReplicate) return;
std::string data(ex.encodedSize(), '\0');
framing::Buffer buf(&data[0], data.size());
ex.encode(buf);
core.mcast(ClusterWiringCreateExchangeBody(ProtocolVersion(), data));
}
void BrokerContext::destroy(broker::Exchange& ex) {
if (tssNoReplicate) return;
core.mcast(ClusterWiringDestroyExchangeBody(ProtocolVersion(), ex.getName()));
}
void BrokerContext::bind(broker::Queue& q, broker::Exchange& ex,
const std::string& key, const framing::FieldTable& args)
{
if (tssNoReplicate) return;
core.mcast(ClusterWiringBindBody(
ProtocolVersion(), q.getName(), ex.getName(), key, args));
}
void BrokerContext::unbind(broker::Queue& q, broker::Exchange& ex,
const std::string& key, const framing::FieldTable& args)
{
if (tssNoReplicate) return;
core.mcast(ClusterWiringUnbindBody(
ProtocolVersion(), q.getName(), ex.getName(), key, args));
}
// n is the number of consumers including the one just added.
// FIXME aconway 2011-06-27: rename, conflicting terms.
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::empty(broker::Queue& ) {
// FIXME aconway 2011-06-28: is this needed?
}
void BrokerContext::stopped(broker::Queue& q) {
boost::intrusive_ptr<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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