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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 "DumpClient.h"
#include "Cluster.h"
#include "ClusterMap.h"
#include "Connection.h"
#include "qpid/client/SessionBase_0_10Access.h"
#include "qpid/client/ConnectionAccess.h"
#include "qpid/broker/Broker.h"
#include "qpid/broker/Queue.h"
#include "qpid/broker/QueueRegistry.h"
#include "qpid/broker/Message.h"
#include "qpid/broker/Exchange.h"
#include "qpid/broker/ExchangeRegistry.h"
#include "qpid/broker/SessionHandler.h"
#include "qpid/broker/SessionState.h"
#include "qpid/framing/MessageTransferBody.h"
#include "qpid/framing/ClusterConnectionMembershipBody.h"
#include "qpid/framing/ClusterConnectionShadowReadyBody.h"
#include "qpid/framing/enum.h"
#include "qpid/framing/ProtocolVersion.h"
#include "qpid/log/Statement.h"
#include "qpid/Url.h"
#include <boost/bind.hpp>
namespace qpid {
namespace cluster {
using broker::Broker;
using broker::Exchange;
using broker::Queue;
using broker::QueueBinding;
using broker::Message;
using namespace framing;
namespace arg=client::arg;
using client::SessionBase_0_10Access;
struct ClusterConnectionProxy : public AMQP_AllProxy::ClusterConnection {
ClusterConnectionProxy(client::Connection& c) :
AMQP_AllProxy::ClusterConnection(*client::ConnectionAccess::getImpl(c)) {}
};
struct ClusterProxy : public AMQP_AllProxy::Cluster {
ClusterProxy(client::Connection& c) :
AMQP_AllProxy::Cluster(*client::ConnectionAccess::getImpl(c)) {}
};
// Create a connection with special version that marks it as a catch-up connection.
client::Connection catchUpConnection() {
client::Connection c;
client::ConnectionAccess::setVersion(c, ProtocolVersion(0x80 , 0x80 + 10));
return c;
}
// Send a control body directly to the session.
void send(client::Session& s, const AMQBody& body) {
client::SessionBase_0_10Access sb(s);
sb.get()->send(body);
}
// TODO aconway 2008-09-24: optimization: dump connections/sessions in parallel.
DumpClient::DumpClient(const MemberId& from, const MemberId& to, const Url& url,
broker::Broker& broker, const ClusterMap& m, const Cluster::Connections& cons,
const boost::function<void()>& ok,
const boost::function<void(const std::exception&)>& fail)
: dumperId(to), dumpeeId(from), dumpeeUrl(url), dumperBroker(broker), map(m), connections(cons),
connection(catchUpConnection()), shadowConnection(catchUpConnection()),
done(ok), failed(fail)
{
connection.open(url);
session = connection.newSession("dump_shared");
}
DumpClient::~DumpClient() {}
// Catch-up exchange name: an illegal AMQP exchange name to avoid clashes.
static const char CATCH_UP_CHARS[] = "\000qpid-dump-exchange";
static const std::string CATCH_UP(CATCH_UP_CHARS, sizeof(CATCH_UP_CHARS));
void DumpClient::dump() {
QPID_LOG(debug, dumperId << " dumping state to " << dumpeeId << " at " << dumpeeUrl);
Broker& b = dumperBroker;
b.getExchanges().eachExchange(boost::bind(&DumpClient::dumpExchange, this, _1));
// Catch-up exchange is used to route messages to the proper queue without modifying routing key.
session.exchangeDeclare(arg::exchange=CATCH_UP, arg::type="fanout", arg::autoDelete=true);
b.getQueues().eachQueue(boost::bind(&DumpClient::dumpQueue, this, _1));
session.sync();
session.close();
std::for_each(connections.begin(), connections.end(), boost::bind(&DumpClient::dumpConnection, this, _1));
AMQFrame frame(map.asMethodBody());
client::ConnectionAccess::getImpl(connection)->handle(frame);
connection.close();
QPID_LOG(debug, dumperId << " dumped state to " << dumpeeId << " at " << dumpeeUrl);
}
void DumpClient::run() {
try {
dump();
done();
} catch (const std::exception& e) {
failed(e);
}
delete this;
}
void DumpClient::dumpExchange(const boost::shared_ptr<Exchange>& ex) {
session.exchangeDeclare(
ex->getName(), ex->getType(),
ex->getAlternate() ? ex->getAlternate()->getName() : std::string(),
arg::passive=false,
arg::durable=ex->isDurable(),
arg::autoDelete=false,
arg::arguments=ex->getArgs());
}
void DumpClient::dumpQueue(const boost::shared_ptr<Queue>& q) {
session.queueDeclare(
q->getName(),
q->getAlternateExchange() ? q->getAlternateExchange()->getName() : std::string(),
arg::passive=false,
arg::durable=q->isDurable(),
arg::exclusive=q->hasExclusiveConsumer(),
arg::autoDelete=q->isAutoDelete(),
arg::arguments=q->getSettings());
session.exchangeBind(q->getName(), CATCH_UP, std::string());
q->eachMessage(boost::bind(&DumpClient::dumpMessage, this, _1));
session.exchangeUnbind(q->getName(), CATCH_UP, std::string());
q->eachBinding(boost::bind(&DumpClient::dumpBinding, this, q->getName(), _1));
}
void DumpClient::dumpMessage(const broker::QueuedMessage& message) {
SessionBase_0_10Access sb(session);
framing::MessageTransferBody transfer(
framing::ProtocolVersion(), CATCH_UP, message::ACCEPT_MODE_NONE, message::ACQUIRE_MODE_PRE_ACQUIRED);
sb.get()->send(transfer, message.payload->getFrames());
}
void DumpClient::dumpBinding(const std::string& queue, const QueueBinding& binding) {
session.exchangeBind(queue, binding.exchange, binding.key, binding.args);
}
void DumpClient::dumpConnection(const boost::intrusive_ptr<Connection>& dumpConnection) {
QPID_LOG(debug, dumperId << " dumping connection " << *dumpConnection);
shadowConnection = catchUpConnection();
broker::Connection& bc = dumpConnection->getBrokerConnection();
// FIXME aconway 2008-09-19: Open with identical settings to dumpConnection: password, vhost, frame size,
// authentication etc. See ConnectionSettings.
shadowConnection.open(dumpeeUrl, bc.getUserId());
dumpConnection->getBrokerConnection().eachSessionHandler(boost::bind(&DumpClient::dumpSession, this, _1));
ClusterConnectionProxy(shadowConnection).shadowReady(
dumpConnection->getId().getMember(),
reinterpret_cast<uint64_t>(dumpConnection->getId().getPointer()));
shadowConnection.close();
QPID_LOG(debug, dumperId << " dumped connection " << *dumpConnection);
}
void DumpClient::dumpSession(broker::SessionHandler& sh) {
QPID_LOG(debug, dumperId << " dumping session " << &sh.getConnection() << "[" << sh.getChannel() << "] = "
<< sh.getSession()->getId());
broker::SessionState* ss = sh.getSession();
if (!ss) return; // no session.
// Create a client session to dump session state.
boost::shared_ptr<client::ConnectionImpl> cimpl = client::ConnectionAccess::getImpl(shadowConnection);
boost::shared_ptr<client::SessionImpl> simpl = cimpl->newSession(ss->getId().getName(), ss->getTimeout(), sh.getChannel());
client::SessionBase_0_10Access(shadowSession).set(simpl);
AMQP_AllProxy::ClusterConnection proxy(simpl->out);
// Re-create session state on remote connection.
// For reasons unknown, boost::bind does not work here with boost 1.33.
ss->eachConsumer(std::bind1st(std::mem_fun(&DumpClient::dumpConsumer),this));
// FIXME aconway 2008-09-19: update remaining session state.
// Reset command-sequence state.
proxy.sessionState(
ss->senderGetReplayPoint().command,
ss->senderGetCommandPoint().command,
ss->senderGetIncomplete(),
ss->receiverGetExpected().command,
ss->receiverGetReceived().command,
ss->receiverGetUnknownComplete(),
ss->receiverGetIncomplete()
);
// FIXME aconway 2008-09-23: update session replay list.
QPID_LOG(debug, dumperId << " dumped session " << sh.getSession()->getId());
}
void DumpClient::dumpConsumer(broker::SemanticState::ConsumerImpl* ci) {
QPID_LOG(debug, dumperId << " dumping consumer " << ci->getName() << " on " << shadowSession.getId());
using namespace message;
shadowSession.messageSubscribe(
arg::queue = ci->getQueue()->getName(),
arg::destination = ci->getName(),
arg::acceptMode = ci->isAckExpected() ? ACCEPT_MODE_EXPLICIT : ACCEPT_MODE_NONE,
arg::acquireMode = ci->isAcquire() ? ACQUIRE_MODE_PRE_ACQUIRED : ACQUIRE_MODE_NOT_ACQUIRED,
arg::exclusive = false , // FIXME aconway 2008-09-23: duplicate from consumer
// TODO aconway 2008-09-23: remaining args not used by current broker.
// Update this code when they are.
arg::resumeId=std::string(),
arg::resumeTtl=0,
arg::arguments=FieldTable()
);
shadowSession.messageSetFlowMode(ci->getName(), ci->isWindowing() ? FLOW_MODE_WINDOW : FLOW_MODE_CREDIT);
shadowSession.messageFlow(ci->getName(), CREDIT_UNIT_MESSAGE, ci->getMsgCredit());
shadowSession.messageFlow(ci->getName(), CREDIT_UNIT_BYTE, ci->getByteCredit());
// FIXME aconway 2008-09-23: need to replicate ConsumerImpl::blocked and notifyEnabled?
QPID_LOG(debug, dumperId << " dumped consumer " << ci->getName() << " on " << shadowSession.getId());
}
}} // namespace qpid::cluster
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