static void streamMetaInformationCb(hbm::streaming::StreamClient& stream, const std::string& method, const Json::Value& params)
{
if (method == hbm::streaming::META_METHOD_AVAILABLE) {
std::cout << "The following signal(s) are available : ";
// simply subscibe all signals that become available.
hbm::streaming::signalReferences_t signalReferences;
for (Json::ValueConstIterator iter = params.begin(); iter!= params.end(); ++iter) {
const Json::Value& element = *iter;
std::cout << element.asString() << ", ";
signalReferences.push_back(element.asString());
}
std::cout << std::endl << std::endl;
try {
stream.subscribe(signalReferences);
std::cout << "The following " << signalReferences.size() << " signal(s) were subscribed: ";
} catch(const std::runtime_error& e) {
std::cerr << "Error '" << e.what() << "' subscribing the following signal(s): ";
}
for(hbm::streaming::signalReferences_t::const_iterator iter=signalReferences.begin(); iter!=signalReferences.end(); ++iter) {
std::cout << "'" << *iter << "' ";
}
std::cout << std::endl << std::endl;
} else if(method==hbm::streaming::META_METHOD_UNAVAILABLE) {
std::cout << "The following signal(s) are not available anyore: ";
for (Json::ValueConstIterator iter = params.begin(); iter!= params.end(); ++iter) {
const Json::Value& element = *iter;
std::cout << element.asString() << ", ";
}
std::cout << std::endl << std::endl;
} else if(method==hbm::streaming::META_METHOD_ALIVE) {
// We do ignore this. We are using TCP keep alive in order to detect communication problems.
} else if(method==hbm::streaming::META_METHOD_FILL) {
if(params.empty()==false) {
unsigned int fill = params[0u].asUInt();
if(fill>25) {
std::cout << stream.address() << ": ring buffer fill level is " << params[0u].asUInt() << "%" << std::endl;
}
}
} else {
std::cout << "Meta information: " << method << " " << Json::FastWriter().write(params) << std::endl;
}
}
