void Dispatcher::handleRequestReceived(const JoynrMessage& message)
{
std::string senderId = message.getHeaderFrom();
std::string receiverId = message.getHeaderTo();
// json request
// lookup necessary data
std::string jsonRequest = message.getPayload();
std::shared_ptr<RequestCaller> caller = requestCallerDirectory.lookup(receiverId);
if (caller == nullptr) {
JOYNR_LOG_ERROR(
logger,
"caller not found in the RequestCallerDirectory for receiverId {}, ignoring",
receiverId);
return;
}
std::string interfaceName = caller->getInterfaceName();
// Get the request interpreter that has been registered with this interface name
std::shared_ptr<IRequestInterpreter> requestInterpreter =
InterfaceRegistrar::instance().getRequestInterpreter(interfaceName);
// deserialize json
try {
Request request = JsonSerializer::deserialize<Request>(jsonRequest);
std::string requestReplyId = request.getRequestReplyId();
JoynrTimePoint requestExpiryDate = message.getHeaderExpiryDate();
std::function<void(std::vector<Variant>)> onSuccess =
[requestReplyId, requestExpiryDate, this, senderId, receiverId](
std::vector<Variant> returnValueVar) {
Reply reply;
reply.setRequestReplyId(requestReplyId);
reply.setResponse(std::move(returnValueVar));
// send reply back to the original sender (ie. sender and receiver ids are reversed
// on
// purpose)
JOYNR_LOG_DEBUG(logger,
"Got reply from RequestInterpreter for requestReplyId {}",
requestReplyId);
JoynrTimePoint now = std::chrono::time_point_cast<std::chrono::milliseconds>(
std::chrono::system_clock::now());
std::int64_t ttl = std::chrono::duration_cast<std::chrono::milliseconds>(
requestExpiryDate - now).count();
messageSender->sendReply(receiverId, // receiver of the request is sender of reply
senderId, // sender of request is receiver of reply
MessagingQos(ttl),
reply);
};
std::function<void(const exceptions::JoynrException&)> onError =
[requestReplyId, requestExpiryDate, this, senderId, receiverId](
const exceptions::JoynrException& exception) {
Reply reply;
reply.setRequestReplyId(requestReplyId);
reply.setError(joynr::exceptions::JoynrExceptionUtil::createVariant(exception));
JOYNR_LOG_DEBUG(logger,
"Got error reply from RequestInterpreter for requestReplyId {}",
requestReplyId);
JoynrTimePoint now = std::chrono::time_point_cast<std::chrono::milliseconds>(
std::chrono::system_clock::now());
std::int64_t ttl = std::chrono::duration_cast<std::chrono::milliseconds>(
requestExpiryDate - now).count();
messageSender->sendReply(receiverId, // receiver of the request is sender of reply
senderId, // sender of request is receiver of reply
MessagingQos(ttl),
reply);
};
// execute request
requestInterpreter->execute(caller,
request.getMethodName(),
request.getParams(),
request.getParamDatatypes(),
onSuccess,
onError);
} catch (const std::invalid_argument& e) {
JOYNR_LOG_ERROR(logger,
"Unable to deserialize request object from: {} - error: {}",
jsonRequest,
e.what());
return;
}
}
