void KaaChannelManager::onServerFailed(ITransportConnectionInfoPtr connectionInfo) {
if (isShutdown_) {
KAA_LOG_WARN("Can't update server. Channel manager is down");
return;
}
if (!connectionInfo) {
KAA_LOG_WARN("Failed to process server failure: bad input data")
throw KaaException("empty connection info pointer");
}
if (connectionInfo->isFailedState()) {
KAA_LOG_DEBUG("Connection already failed. Ignoring connection failover!");
return;
} else {
connectionInfo->setFailedState();
}
if (connectionInfo->getServerType() == ServerType::BOOTSTRAP) {
ITransportConnectionInfoPtr nextConnectionInfo = getNextBootstrapServer(connectionInfo->getTransportId(), false);
if (nextConnectionInfo) {
onTransportConnectionInfoUpdated(nextConnectionInfo);
} else {
FailoverStrategyDecision decision = failoverStrategy_->onFailover(Failover::BOOTSTRAP_SERVERS_NA);
switch (decision.getAction()) {
case FailoverStrategyAction::NOOP:
KAA_LOG_WARN("No operation is performed according to failover strategy decision.");
break;
case FailoverStrategyAction::RETRY:
{
std::size_t period = decision.getRetryPeriod();
KAA_LOG_WARN(boost::format("Attempt to reconnect to first bootstrap server will be made in %1% secs "
"according to failover strategy decision.") % period);
bsTransportId_ = connectionInfo->getTransportId();
retryTimer_.stop();
retryTimer_.start(period, [&]
{
onTransportConnectionInfoUpdated(getNextBootstrapServer(bsTransportId_, true));
});
break;
}
case FailoverStrategyAction::STOP_APP:
KAA_LOG_WARN("Stopping application according to failover strategy decision!");
exit(EXIT_FAILURE);
break;
default:
break;
}
}
} else {
bootstrapManager_.useNextOperationsServer(connectionInfo->getTransportId());
}
}
void KaaChannelManager::onTransportConnectionInfoUpdated(ITransportConnectionInfoPtr connectionInfo) {
if (isShutdown_) {
KAA_LOG_WARN("Can't update server. Channel manager is down");
return;
}
if (!connectionInfo) {
KAA_LOG_WARN("Failed to update connection info: bad input data")
throw KaaException("empty connection info pointer");
}
connectionInfo->resetFailedState();
TransportProtocolId protocolId = connectionInfo->getTransportId();
if (connectionInfo->getServerType() == ServerType::OPERATIONS) {
KAA_MUTEX_LOCKING("lastOpsServersGuard_");
KAA_MUTEX_UNIQUE_DECLARE(lastOpsServers_Lock, lastOpsServersGuard_);
KAA_MUTEX_LOCKED("lastOpsServersGuard_");
lastOpsServers_[protocolId] = connectionInfo;
}
KAA_MUTEX_LOCKING("channelGuard_");
KAA_R_MUTEX_UNIQUE_DECLARE(channelLock, channelGuard_);
KAA_MUTEX_LOCKED("channelGuard_");
for (auto& channel : channels_) {
if (channel->getServerType() == connectionInfo->getServerType() && channel->getTransportProtocolId() == protocolId) {
KAA_LOG_DEBUG(boost::format("Setting a new connection data for channel \"%1%\" %2%")
% channel->getId() % LoggingUtils::TransportProtocolIdToString(protocolId));
channel->setServer(connectionInfo);
}
}
}
void DefaultOperationTcpChannel::setServer(ITransportConnectionInfoPtr server)
{
KAA_MUTEX_LOCKING("channelGuard_");
KAA_MUTEX_UNIQUE_DECLARE(lock, channelGuard_);
KAA_MUTEX_LOCKED("channelGuard_");
if (isShutdown_) {
KAA_LOG_WARN(boost::format("Channel [%1%] ignore new server: channel is shut down") % getId());
return;
}
if (server->getTransportId() != getTransportProtocolId()) {
KAA_LOG_WARN(boost::format("Channel [%1%] ignore new server: unsupported transport %2%")
% getId()
% LoggingUtils::toString(server->getTransportId()));
return;
}
KAA_LOG_TRACE(boost::format("Channel [%1%] preparing to use new server %2%")
% getId()
% LoggingUtils::toString(*server));
currentServer_ = std::make_shared<IPTransportInfo>(server);
encDec_ = std::make_shared<RsaEncoderDecoder>(clientKeys_.getPublicKey(),
clientKeys_.getPrivateKey(),
currentServer_->getPublicKey(),
context_);
isFailoverInProgress_ = false;
if (!isPaused_) {
KAA_MUTEX_UNLOCKING("channelGuard_");
KAA_UNLOCK(lock);
KAA_MUTEX_UNLOCKED("channelGuard_");
closeConnection();
KAA_LOG_TRACE(boost::format("Channel [%1%] scheduling open connection")
% getId());
io_.post(std::bind(&DefaultOperationTcpChannel::openConnection, this));
}
}
IPTransportInfo::IPTransportInfo(ITransportConnectionInfoPtr connectionInfo)
: GenericTransportInfo(connectionInfo->getServerType(), ProtocolMetaData())
{
if (!connectionInfo || connectionInfo->getConnectionInfo().empty()) {
KAA_LOG_ERROR("Failed to create IP transport data: bad input data");
throw KaaException("Bad connection data");
}
serverType_ = connectionInfo->getServerType();
connectionData_ = connectionInfo->getConnectionInfo();
accessPointId_ = connectionInfo->getAccessPointId();
protocolId_ = connectionInfo->getTransportId();
std::uint8_t *data = connectionData_.data();
std::int32_t publicKeyLength = boost::asio::detail::socket_ops::network_to_host_long(*((int32_t *)data));
data += sizeof(std::int32_t);
publicKey_ = PublicKey(data, publicKeyLength);
data += publicKeyLength;
std::int32_t hostLength = boost::asio::detail::socket_ops::network_to_host_long(*((int32_t *)data));
data += sizeof(std::int32_t);
host_.assign(data, data + hostLength);
data += hostLength;
port_ = boost::asio::detail::socket_ops::network_to_host_long(*((int32_t *)data));
std::ostringstream ss;
ss << "http://" << host_ << ":" << port_;
url_.assign(ss.str());
if ((3 * sizeof(std::int32_t) + publicKeyLength + hostLength) > connectionData_.size()) {
KAA_LOG_ERROR("Failed to create IP transport data: less size of input data than needed");
throw KaaException("Bad connection data");
}
KAA_LOG_TRACE(boost::format("Create IP transport data: host=%1%, port=%2%, publicKeyLength=%3%") % host_% port_ % publicKey_.size());
}
void AbstractHttpChannel::setServer(ITransportConnectionInfoPtr server)
{
if (server->getTransportId() != getTransportProtocolId()) {
KAA_LOG_ERROR(boost::format("Channel [%1%] ignored invalid server info") % getId());
return;
}
KAA_MUTEX_LOCKING("channelGuard_");
KAA_MUTEX_UNIQUE_DECLARE(lock, channelGuard_);
KAA_MUTEX_LOCKED("channelGuard_");
KAA_LOG_TRACE(boost::format("Channel [%1%] preparing to use new server %2%")
% getId()
% LoggingUtils::toString(*server));
currentServer_ = std::make_shared<IPTransportInfo>(server);
httpDataProcessor_.setEncoderDecoder(
std::make_shared<RsaEncoderDecoder>(clientKeys_.getPublicKey(),
clientKeys_.getPrivateKey(),
currentServer_->getPublicKey(),
context_));
}