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/*
*
* Copyright (c) 2006 The Apache Software Foundation
*
* Licensed 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 "Connection.h"
#include "ConnectionCodec.h"
#include "qpid/cluster/Cluster.h"
#include "qpid/cluster/ConnectionCodec.h"
#include "qpid/cluster/UpdateClient.h"
#include "qpid/broker/Broker.h"
#include "qpid/Plugin.h"
#include "qpid/Options.h"
#include "qpid/shared_ptr.h"
#include "qpid/sys/AtomicValue.h"
#include "qpid/log/Statement.h"
#include "qpid/management/ManagementBroker.h"
#include "qpid/management/IdAllocator.h"
#include "qpid/broker/Exchange.h"
#include "qpid/broker/Queue.h"
#include "qpid/broker/SessionState.h"
#include <boost/utility/in_place_factory.hpp>
#include <boost/scoped_ptr.hpp>
namespace qpid {
namespace cluster {
using namespace std;
using broker::Broker;
using management::IdAllocator;
using management::ManagementAgent;
using management::ManagementBroker;
struct ClusterValues {
string name;
string url;
bool quorum;
size_t readMax, writeEstimate;
ClusterValues() : quorum(false), readMax(10), writeEstimate(64) {}
Url getUrl(uint16_t port) const {
if (url.empty()) return Url::getIpAddressesUrl(port);
return Url(url);
}
};
/** Note separating options from values to work around boost version differences.
* Old boost takes a reference to options objects, but new boost makes a copy.
* New boost allows a shared_ptr but that's not compatible with old boost.
*/
struct ClusterOptions : public Options {
ClusterValues& values;
ClusterOptions(ClusterValues& v) : Options("Cluster Options"), values(v) {
addOptions()
("cluster-name", optValue(values.name, "NAME"), "Name of cluster to join")
("cluster-url", optValue(values.url,"URL"),
"URL of this broker, advertized to the cluster.\n"
"Defaults to a URL listing all the local IP addresses\n")
#if HAVE_LIBCMAN
("cluster-cman", optValue(values.quorum), "Integrate with Cluster Manager (CMAN) cluster.")
#endif
("cluster-read-max", optValue(values.readMax,"N"),
"Experimental: Limit per-client-connection queue of read buffers. 0=no limit.")
("cluster-write-estimate", optValue(values.writeEstimate, "Kb"),
"Experimental: initial estimate for connection write rate per multicast cycle");
}
};
struct UpdateClientIdAllocator : management::IdAllocator
{
qpid::sys::AtomicValue<uint64_t> sequence;
UpdateClientIdAllocator() : sequence(0x4000000000000000LL) {}
uint64_t getIdFor(management::Manageable* m)
{
if (isUpdateQueue(m) || isUpdateExchange(m) || isUpdateSession(m) || isUpdateBinding(m)) {
return ++sequence;
} else {
return 0;
}
}
bool isUpdateQueue(management::Manageable* manageable)
{
qpid::broker::Queue* queue = dynamic_cast<qpid::broker::Queue*>(manageable);
return queue && queue->getName() == UpdateClient::UPDATE;
}
bool isUpdateExchange(management::Manageable* manageable)
{
qpid::broker::Exchange* exchange = dynamic_cast<qpid::broker::Exchange*>(manageable);
return exchange && exchange->getName() == UpdateClient::UPDATE;
}
bool isUpdateSession(management::Manageable* manageable)
{
broker::SessionState* session = dynamic_cast<broker::SessionState*>(manageable);
return session && session->getId().getName() == UpdateClient::UPDATE;
}
bool isUpdateBinding(management::Manageable* manageable)
{
broker::Exchange::Binding* binding = dynamic_cast<broker::Exchange::Binding*>(manageable);
return binding && binding->queue->getName() == UpdateClient::UPDATE;
}
};
struct ClusterPlugin : public Plugin {
ClusterValues values;
ClusterOptions options;
Cluster* cluster;
boost::scoped_ptr<ConnectionCodec::Factory> factory;
ClusterPlugin() : options(values), cluster(0) {}
Options* getOptions() { return &options; }
void earlyInitialize(Plugin::Target& target) {
if (values.name.empty()) return; // Only if --cluster-name option was specified.
Broker* broker = dynamic_cast<Broker*>(&target);
if (!broker) return;
cluster = new Cluster(
values.name,
values.url.empty() ? Url() : Url(values.url),
*broker,
values.quorum,
values.readMax, values.writeEstimate*1024
);
broker->setConnectionFactory(
boost::shared_ptr<sys::ConnectionCodec::Factory>(
new ConnectionCodec::Factory(broker->getConnectionFactory(), *cluster)));
broker->getExchanges().registerExchange(cluster->getFailoverExchange());
ManagementBroker* mgmt = dynamic_cast<ManagementBroker*>(ManagementAgent::Singleton::getInstance());
if (mgmt) {
std::auto_ptr<IdAllocator> allocator(new UpdateClientIdAllocator());
mgmt->setAllocator(allocator);
}
}
void initialize(Plugin::Target& target) {
Broker* broker = dynamic_cast<Broker*>(&target);
if (broker && cluster)
cluster->initialize();
}
};
static ClusterPlugin instance; // Static initialization.
}} // namespace qpid::cluster
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