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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 "qpid/log/Statement.h"
#include "qpid/broker/FedOps.h"
#include "qpid/broker/Queue.h"
#include "qpid/broker/DirectExchange.h"
#include <iostream>
using namespace qpid::broker;
using namespace qpid::framing;
using namespace qpid::sys;
using qpid::management::Manageable;
namespace _qmf = qmf::org::apache::qpid::broker;
namespace
{
const std::string qpidExclusiveBinding("qpid.exclusive-binding");
}
DirectExchange::DirectExchange(const string& _name, Manageable* _parent, Broker* b) : Exchange(_name, _parent, b)
{
if (mgmtExchange != 0)
mgmtExchange->set_type(typeName);
}
DirectExchange::DirectExchange(const string& _name, bool _durable,
const FieldTable& _args, Manageable* _parent, Broker* b) :
Exchange(_name, _durable, _args, _parent, b)
{
if (mgmtExchange != 0)
mgmtExchange->set_type(typeName);
}
bool DirectExchange::bind(Queue::shared_ptr queue, const string& routingKey, const FieldTable* args)
{
string fedOp(fedOpBind);
string fedTags;
string fedOrigin;
bool exclusiveBinding = false;
if (args) {
fedOp = args->getAsString(qpidFedOp);
fedTags = args->getAsString(qpidFedTags);
fedOrigin = args->getAsString(qpidFedOrigin);
exclusiveBinding = args->get(qpidExclusiveBinding); // only direct exchanges take exclusive bindings
}
bool propagate = false;
if (args == 0 || fedOp.empty() || fedOp == fedOpBind) {
Mutex::ScopedLock l(lock);
Binding::shared_ptr b(new Binding(routingKey, queue, this, FieldTable(), fedOrigin));
BoundKey& bk = bindings[routingKey];
if (exclusiveBinding) bk.queues.clear();
QPID_LOG(debug, "Bind key [" << routingKey << "] to queue " << queue->getName()
<< " (origin=" << fedOrigin << ")");
if (bk.queues.add_unless(b, MatchQueue(queue))) {
b->startManagement();
propagate = bk.fedBinding.addOrigin(queue->getName(), fedOrigin);
if (mgmtExchange != 0) {
mgmtExchange->inc_bindingCount();
}
} else {
// queue already present - still need to track fedOrigin
bk.fedBinding.addOrigin(queue->getName(), fedOrigin);
return false;
}
} else if (fedOp == fedOpUnbind) {
Mutex::ScopedLock l(lock);
BoundKey& bk = bindings[routingKey];
QPID_LOG(debug, "Bind - fedOpUnbind key [" << routingKey << "] queue " << queue->getName()
<< " (origin=" << fedOrigin << ")" << " (count=" << bk.fedBinding.count() << ")");
propagate = bk.fedBinding.delOrigin(queue->getName(), fedOrigin);
if (bk.fedBinding.countFedBindings(queue->getName()) == 0)
unbind(queue, routingKey, args);
} else if (fedOp == fedOpReorigin) {
/** gather up all the keys that need rebinding in a local vector
* while holding the lock. Then propagate once the lock is
* released
*/
std::vector<std::string> keys2prop;
{
Mutex::ScopedLock l(lock);
for (Bindings::iterator iter = bindings.begin();
iter != bindings.end(); iter++) {
const BoundKey& bk = iter->second;
if (bk.fedBinding.hasLocal()) {
keys2prop.push_back(iter->first);
}
}
} /* lock dropped */
for (std::vector<std::string>::const_iterator key = keys2prop.begin();
key != keys2prop.end(); key++) {
propagateFedOp( *key, string(), fedOpBind, string());
}
}
routeIVE();
if (propagate)
propagateFedOp(routingKey, fedTags, fedOp, fedOrigin);
return true;
}
bool DirectExchange::unbind(Queue::shared_ptr queue, const string& routingKey, const FieldTable* args)
{
string fedOrigin(args ? args->getAsString(qpidFedOrigin) : "");
bool propagate = false;
QPID_LOG(debug, "Unbinding key [" << routingKey << "] from queue " << queue->getName()
<< " on exchange " << getName() << " origin=" << fedOrigin << ")" );
{
Mutex::ScopedLock l(lock);
BoundKey& bk = bindings[routingKey];
if (bk.queues.remove_if(MatchQueue(queue))) {
propagate = bk.fedBinding.delOrigin(queue->getName(), fedOrigin);
if (mgmtExchange != 0) {
mgmtExchange->dec_bindingCount();
}
} else {
return false;
}
}
// If I delete my local binding, propagate this unbind to any upstream brokers
if (propagate)
propagateFedOp(routingKey, string(), fedOpUnbind, string());
return true;
}
void DirectExchange::route(Deliverable& msg, const string& routingKey, const FieldTable* /*args*/)
{
PreRoute pr(msg, this);
ConstBindingList b;
{
Mutex::ScopedLock l(lock);
b = bindings[routingKey].queues.snapshot();
}
doRoute(msg, b);
}
bool DirectExchange::isBound(Queue::shared_ptr queue, const string* const routingKey, const FieldTable* const)
{
Mutex::ScopedLock l(lock);
if (routingKey) {
Bindings::iterator i = bindings.find(*routingKey);
if (i == bindings.end())
return false;
if (!queue)
return true;
Queues::ConstPtr p = i->second.queues.snapshot();
return p && std::find_if(p->begin(), p->end(), MatchQueue(queue)) != p->end();
} else if (!queue) {
//if no queue or routing key is specified, just report whether any bindings exist
return bindings.size() > 0;
} else {
for (Bindings::iterator i = bindings.begin(); i != bindings.end(); i++) {
Queues::ConstPtr p = i->second.queues.snapshot();
if (p && std::find_if(p->begin(), p->end(), MatchQueue(queue)) != p->end()) return true;
}
return false;
}
return false;
}
DirectExchange::~DirectExchange() {}
const std::string DirectExchange::typeName("direct");
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