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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/client/FailoverListener.h"
#include "qpid/client/Session.h"
#include "qpid/framing/Uuid.h"
#include "qpid/log/Statement.h"
#include "qpid/log/Helpers.h"
namespace qpid {
namespace client {
const std::string FailoverListener::AMQ_FAILOVER("amq.failover");
FailoverListener::FailoverListener(Connection c) :
connection(c),
session(c.newSession(AMQ_FAILOVER+"."+framing::Uuid(true).str())),
subscriptions(session)
{ init(true); }
FailoverListener::FailoverListener(Connection c, bool useInitial) :
connection(c),
session(c.newSession(AMQ_FAILOVER+"."+framing::Uuid(true).str())),
subscriptions(session)
{ init(useInitial); }
void FailoverListener::init(bool useInitial) {
if (useInitial) knownBrokers = connection.getInitialBrokers();
if (session.exchangeQuery(arg::name=AMQ_FAILOVER).getNotFound()) {
session.close();
return;
}
std::string qname=session.getId().getName();
session.queueDeclare(arg::queue=qname, arg::exclusive=true, arg::autoDelete=true);
session.exchangeBind(arg::queue=qname, arg::exchange=AMQ_FAILOVER);
subscriptions.subscribe(*this, qname, SubscriptionSettings(FlowControl::unlimited(),
ACCEPT_MODE_NONE));
thread = sys::Thread(*this);
}
void FailoverListener::run() {
try {
subscriptions.run();
} catch(...) {}
}
FailoverListener::~FailoverListener() {
try {
subscriptions.stop();
thread.join();
if (connection.isOpen()) {
session.sync();
session.close();
}
} catch (...) {}
}
void FailoverListener::received(Message& msg) {
sys::Mutex::ScopedLock l(lock);
knownBrokers = getKnownBrokers(msg);
}
std::vector<Url> FailoverListener::getKnownBrokers() const {
sys::Mutex::ScopedLock l(lock);
return knownBrokers;
}
std::vector<Url> FailoverListener::getKnownBrokers(const Message& msg) {
std::vector<Url> knownBrokers;
framing::Array urlArray;
msg.getHeaders().getArray("amq.failover", urlArray);
for (framing::Array::ValueVector::const_iterator i = urlArray.begin();
i != urlArray.end();
++i )
knownBrokers.push_back(Url((*i)->get<std::string>()));
return knownBrokers;
}
}} // namespace qpid::client
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