void Cluster::configChange(const MemberId&,
const std::string& membersStr,
const std::string& leftStr,
const std::string& joinedStr,
Lock& l)
{
if (state == LEFT) return;
MemberSet members = decodeMemberSet(membersStr);
MemberSet left = decodeMemberSet(leftStr);
MemberSet joined = decodeMemberSet(joinedStr);
QPID_LOG(notice, *this << " configuration change: " << members);
QPID_LOG_IF(notice, !left.empty(), *this << " Members left: " << left);
QPID_LOG_IF(notice, !joined.empty(), *this << " Members joined: " << joined);
// If we are still joining, make sure there is someone to give us an update.
elders = intersection(elders, members);
if (elders.empty() && INIT < state && state < CATCHUP) {
QPID_LOG(critical, "Cannot update, all potential updaters left the cluster.");
leave(l);
return;
}
bool memberChange = map.configChange(members);
// Update initital status for members joining or leaving.
initMap.configChange(members);
if (initMap.isResendNeeded()) {
mcast.mcastControl(
ClusterInitialStatusBody(
ProtocolVersion(), CLUSTER_VERSION, state > INIT, clusterId,
store.getState(), store.getShutdownId(),
initMap.getFirstConfigStr(),
vectorToUrlArray(getUrls(l))
),
self);
}
if (initMap.transitionToComplete()) initMapCompleted(l);
if (state >= CATCHUP && memberChange) {
memberUpdate(l);
if (elders.empty()) becomeElder(l);
}
updateMgmtMembership(l); // Update on every config change for consistency
}
void Cluster::processFrame(const EventFrame& e, Lock& l) {
if (e.isCluster()) {
QPID_LOG_IF(trace, loggable(e.frame), *this << " DLVR: " << e);
ClusterDispatcher dispatch(*this, e.connectionId.getMember(), l);
if (!framing::invoke(dispatch, *e.frame.getBody()).wasHandled())
throw Exception(QPID_MSG("Invalid cluster control"));
}
else if (state >= CATCHUP) {
map.incrementFrameSeq();
ConnectionPtr connection = getConnection(e, l);
if (connection) {
QPID_LOG_IF(trace, loggable(e.frame),
*this << " DLVR " << map.getFrameSeq() << ": " << e);
connection->deliveredFrame(e);
}
else
throw Exception(QPID_MSG("Unknown connection: " << e));
}
else // Drop connection frames while state < CATCHUP
QPID_LOG_IF(trace, loggable(e.frame), *this << " DROP (joining): " << e);
}
void Cluster::initialStatus(const MemberId& member, uint32_t version, bool active,
const framing::Uuid& id,
framing::cluster::StoreState store,
const framing::Uuid& shutdownId,
const std::string& firstConfig,
const framing::Array& urls,
Lock& l)
{
if (version != CLUSTER_VERSION) {
QPID_LOG(critical, *this << " incompatible cluster versions " <<
version << " != " << CLUSTER_VERSION);
leave(l);
return;
}
QPID_LOG_IF(debug, state == PRE_INIT, *this
<< " received initial status from " << member);
initMap.received(
member,
ClusterInitialStatusBody(ProtocolVersion(), version, active, id,
store, shutdownId, firstConfig, urls)
);
if (initMap.transitionToComplete()) initMapCompleted(l);
}
Exception::Exception(const std::string& msg) throw() : message(msg) {
QPID_LOG_IF(debug, !msg.empty(), "Exception constructed: " << message);
}
