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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 "StatusCheck.h"
#include "ConnectionObserver.h"
#include "HaBroker.h"
#include "qpid/broker/Broker.h"
#include "qpid/log/Statement.h"
#include "qpid/messaging/Address.h"
#include "qpid/messaging/Connection.h"
#include "qpid/messaging/Message.h"
#include "qpid/messaging/Receiver.h"
#include "qpid/messaging/Sender.h"
#include "qpid/messaging/Session.h"
#include "qpid/types/Variant.h"
namespace qpid {
namespace ha {
using namespace qpid::messaging;
using namespace qpid::types;
using namespace std;
using namespace sys;
const string HA_BROKER = "org.apache.qpid.ha:habroker:ha-broker";
class StatusCheckThread : public sys::Runnable {
public:
StatusCheckThread(StatusCheck& sc, const qpid::Address& addr)
: url(addr), statusCheck(sc) {}
void run();
private:
Url url;
StatusCheck& statusCheck;
};
void StatusCheckThread::run() {
string logPrefix("Status check " + url.str() + ": ");
Connection c;
try {
// Check for self connections
Variant::Map options, clientProperties;
clientProperties[ConnectionObserver::ADMIN_TAG] = 1; // Allow connection to backups
clientProperties[ConnectionObserver::ADDRESS_TAG] = url.str();
clientProperties[ConnectionObserver::BACKUP_TAG] = statusCheck.brokerInfo.asMap();
// Set connection options
const Settings& settings = statusCheck.settings;
if (settings.username.size()) options["username"] = settings.username;
if (settings.password.size()) options["password"] = settings.password;
if (settings.mechanism.size()) options["sasl_mechanisms"] = settings.mechanism;
options["client-properties"] = clientProperties;
options["heartbeat"] = statusCheck.heartbeat/sys::TIME_SEC;
c = Connection(url.str(), options);
c.open();
Session session = c.createSession();
messaging::Address responses("#;{create:always,node:{x-declare:{exclusive:True,auto-delete:True,arguments:{'qpid.replicate':none}}}}");
Receiver r = session.createReceiver(responses);
Sender s = session.createSender("qmf.default.direct/broker");
Message request;
request.setReplyTo(responses);
request.setContentType("amqp/map");
request.setProperty("x-amqp-0-10.app-id", "qmf2");
request.setProperty("qmf.opcode", "_query_request");
Variant::Map oid;
oid["_object_name"] = HA_BROKER;
Variant::Map content;
content["_what"] = "OBJECT";
content["_object_id"] = oid;
encode(content, request);
s.send(request);
messaging::Duration timeout(statusCheck.heartbeat/sys::TIME_MSEC);
Message response = r.fetch(timeout);
session.acknowledge();
Variant::List contentIn;
decode(response, contentIn);
if (contentIn.size() == 1) {
Variant::Map details = contentIn.front().asMap()["_values"].asMap();
string status = details["status"].getString();
QPID_LOG(debug, logPrefix << status);
if (status != "joining") {
statusCheck.setPromote(false);
QPID_LOG(info, logPrefix << "Joining established cluster");
}
}
else
QPID_LOG(error, logPrefix << "Invalid response " << response.getContent());
} catch(...) {}
try { c.close(); } catch(...) {}
delete this;
}
// Note: Don't use hb outside of the constructor, it may be deleted.
StatusCheck::StatusCheck(HaBroker& hb) :
promote(true),
settings(hb.getSettings()),
heartbeat(hb.getBroker().getLinkHeartbeatInterval()),
brokerInfo(hb.getBrokerInfo())
{}
StatusCheck::~StatusCheck() {
// Join any leftovers
for (size_t i = 0; i < threads.size(); ++i) threads[i].join();
}
void StatusCheck::setUrl(const Url& url) {
Mutex::ScopedLock l(lock);
for (size_t i = 0; i < url.size(); ++i)
threads.push_back(Thread(new StatusCheckThread(*this, url[i])));
}
bool StatusCheck::canPromote() {
Mutex::ScopedLock l(lock);
while (!threads.empty()) {
Thread t = threads.back();
threads.pop_back();
Mutex::ScopedUnlock u(lock);
t.join();
}
return promote;
}
void StatusCheck::setPromote(bool p) {
Mutex::ScopedLock l(lock);
promote = p;
}
}} // namespace qpid::ha
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