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199 lines (159 loc) · 6.67 KB
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#include "ClientSession.h"
#include <cassert>
#include <iterator>
#include <iomanip>
#include "comms/process.h"
#include "comms/iterator.h"
#include "comms/units.h"
namespace cc_tutorial
{
void ClientSession::handle(Msg1& msg)
{
std::cout << "Received \"" << msg.doName() << "\" with ID=" << (unsigned)msg.doGetId() << '\n' <<
'\t' << msg.field_f1().name() << " = " << std::fixed << msg.field_f1().getScaled<float>() <<
" (orig = " << msg.field_f1().value() << ")\n" <<
'\t' << msg.field_f2().name() << " = " << std::fixed << msg.field_f2().getScaled<double>() <<
" (orig = " << msg.field_f2().value() << ")\n" <<
std::endl;
doNextStage();
}
void ClientSession::handle(Msg2& msg)
{
// Compile time checks could be used before third party units conversions (like Boost.Units)
static_assert(comms::units::isSeconds<Msg2::Field_f1>(), "Unexpected units");
static_assert(comms::units::isMillimeters<Msg2::Field_f2>(), "Unexpected units");
std::cout << "Received \"" << msg.doName() << "\" with ID=" << (unsigned)msg.doGetId() << '\n' <<
'\t' << msg.field_f1().name() << " = " << msg.field_f1().value() << '\n' <<
"\t\t= " << comms::units::getMicroseconds<std::uintmax_t>(msg.field_f1()) << " us\n" <<
"\t\t= " << comms::units::getMilliseconds<unsigned>(msg.field_f1()) << " ms\n" <<
"\t\t= " << comms::units::getSeconds<unsigned>(msg.field_f1()) << " s\n" <<
"\t\t= " << std::fixed << comms::units::getMinutes<float>(msg.field_f1()) << " min\n" <<
"\t\t= " << std::fixed << comms::units::getHours<double>(msg.field_f1()) << " h\n" <<
'\t' << msg.field_f2().name() << " = " << std::fixed << msg.field_f2().value() << '\n' <<
"\t\t= " << std::fixed << comms::units::getMicrometers<double>(msg.field_f2()) << " um\n" <<
"\t\t= " << std::fixed << comms::units::getMillimeters<double>(msg.field_f2()) << " mm\n" <<
"\t\t= " << std::fixed << comms::units::getMeters<double>(msg.field_f2()) << " m\n" <<
std::endl;
if (m_currentStage != CommsStage_Msg2) {
std::cerr << "ERROR: Unexpected message received" << std::endl;
return;
}
doNextStage();
}
void ClientSession::handle(Msg3& msg)
{
std::cout << "Received \"" << msg.doName() << "\" with ID=" << (unsigned)msg.doGetId() << '\n' <<
'\t' << msg.field_f1().name() << " = " << msg.field_f1().value() << '\n' <<
"\t\t= " << std::fixed << comms::units::getMicrometers<double>(msg.field_f1()) << " um\n" <<
"\t\t= " << std::fixed << comms::units::getMillimeters<double>(msg.field_f1()) << " mm\n" <<
"\t\t= " << std::fixed << comms::units::getCentimeters<double>(msg.field_f1()) << " cm\n" <<
"\t\t= " << std::fixed << comms::units::getMeters<double>(msg.field_f1()) << " m\n" <<
std::endl;
if (m_currentStage != CommsStage_Msg3) {
std::cerr << "ERROR: Unexpected message received: " << std::endl;
return;
}
doNextStage();
}
void ClientSession::handle(Message& msg)
{
// The statement below uses polymorphic message name and ID retrievals.
std::cout << "ERROR: Received unexpected message \"" << msg.name() << "\" with ID=" <<
(unsigned)msg.getId() << std::endl;
}
bool ClientSession::startImpl()
{
doNextStage();
return true;
}
std::size_t ClientSession::processInputImpl(const std::uint8_t* buf, std::size_t bufLen)
{
std::cout << "Processing input: " << std::hex;
std::copy_n(buf, bufLen, std::ostream_iterator<unsigned>(std::cout, " "));
std::cout << std::dec << std::endl;
// Process reported input, create relevant message objects and
// dispatch all the created messages
// to this object for handling (appropriate handle() member function will be called)
auto result = comms::processAllWithDispatch(buf, bufLen, m_frame, *this);
if (result < bufLen) {
std::cout << "Processed only " << result << " bytes." << std::endl;
}
return result;
}
void ClientSession::sendMessage(const Message& msg)
{
std::cout << "Sending message \"" << msg.name() << "\" with ID=" << (unsigned)msg.getId() << std::endl;
// The statement below uses polymorphic message name and ID retrievals.
std::vector<std::uint8_t> output;
// Use polymorphic serialization length calculation to reserve
// needed capacity
output.reserve(m_frame.length(msg));
// Serialize message into the buffer (including framing)
// The serialization uses polymorphic write functionality.
auto writeIter = std::back_inserter(output);
// The frame will use polymorphic message ID retrieval to
// prefix message payload with message ID
auto es = m_frame.write(msg, writeIter, output.max_size());
if (es != comms::ErrorStatus::Success) {
assert(!"Write operation failed unexpectedly");
return;
}
// Send serialized message back
sendOutput(&output[0], output.size());
}
void ClientSession::doNextStage()
{
do {
if (CommsStage_NumOfValues <= m_currentStage) {
// Happens in first cycle
m_currentStage = static_cast<decltype(m_currentStage)>(0);
break;
}
m_currentStage =
static_cast<decltype(m_currentStage)>(
static_cast<unsigned>(m_currentStage) + 1);
if (m_currentStage < CommsStage_NumOfValues) {
break;
}
// Client execution is complete
getIo().stop();
return;
} while (false);
using NextSendFunc = void (ClientSession::*)();
static const NextSendFunc Map[] = {
/* CommsStage_Msg1 */ &ClientSession::sendMsg1,
/* CommsStage_Msg2 */ &ClientSession::sendMsg2,
/* CommsStage_Msg3 */ &ClientSession::sendMsg3,
};
static const std::size_t MapSize = std::extent<decltype(Map)>::value;
static_assert(MapSize == CommsStage_NumOfValues, "Invalid Map");
auto func = Map[m_currentStage];
(this->*func)(); // Call appropriate sending function
}
void ClientSession::sendMsg1()
{
Msg1 msg;
msg.field_f1().setScaled(1.234f);
assert(msg.field_f1().value() == 1234);
msg.field_f2().setScaled(12.345678);
assert(msg.field_f2().value() == 12345678);
sendMessage(msg);
}
void ClientSession::sendMsg2()
{
Msg2 msg;
comms::units::setMinutes(msg.field_f1(), 1.5);
comms::units::setMeters(msg.field_f2(), 1.2);
sendMessage(msg);
}
void ClientSession::sendMsg3()
{
Msg3 msg;
comms::units::setMillimeters(msg.field_f1(), 123.45678);
sendMessage(msg);
}
SessionPtr Session::createClient(boost_wrap::io& io)
{
return SessionPtr(new ClientSession(io));
}
} // namespace cc_tutorial