void udp_listener::listen_handler_( buffer_type bt, const boost::system::error_code& error, const size_t bytes_received )
{
if ( error )
{
static const int NO_ENOUGHT_BUFFER = 234;
if ( error.value() == NO_ENOUGHT_BUFFER )
{
enlarge_buffer_( bt );
register_listen_( bt, bytes_received );
}
return;
}
if ( bytes_received == bt->size() && (*bt)[ bytes_received - 1 ] != '\0' )
{
enlarge_buffer_( bt );
register_listen_( bt, bytes_received );
}
else
{
message_type data( bt->begin(), bt->begin() + bytes_received );
message m;
m.data = data;
m.type_ = type_;
func_(m);
this->register_listen_( );
}
}
/// @pre `n <= buf_.size()`
static chunk_type get_chunk(buffer_type& buf, size_t n) {
CAF_LOG_TRACE(CAF_ARG(buf) << CAF_ARG(n));
chunk_type xs;
if (!buf.empty() && n > 0) {
xs.reserve(std::min(n, buf.size()));
if (n < buf.size()) {
auto first = buf.begin();
auto last = first + static_cast<ptrdiff_t>(n);
std::move(first, last, std::back_inserter(xs));
buf.erase(first, last);
} else {
std::move(buf.begin(), buf.end(), std::back_inserter(xs));
buf.clear();
}
}
return xs;
}
void Tourist::read(tcp::socket &socket, buffer_type &buffer, size_t n, rw_handler_method method) {
if (n > buffer.size()) {
LOG_ERROR << "Read " << n << " bytes into " << buffer.size() << "-byte buffer";
return;
}
std::shared_ptr<Tourist> p_this = shared_from_this();
boost::asio::async_read(socket, boost::asio::buffer(buffer, n),
[p_this, method, &socket, &buffer](const boost::system::error_code &error, size_t n) {
LOG_VERBOSE << "[" << p_this->id_ << "] " << "Read " << n << " bytes";
IF_LOG(plog::verbose) {
boost::algorithm::hex(buffer.begin(), buffer.begin() + n,
std::ostream_iterator<char>(std::cout));
std::cout << std::endl;
}
if (method) {
((*p_this).*method)(error, n);
}
});
void instance::write(buffer_type& buf,
message_type operation,
uint32_t* payload_len,
uint64_t operation_data,
const node_id& source_node,
const node_id& dest_node,
actor_id source_actor,
actor_id dest_actor,
payload_writer* pw) {
if (! pw) {
binary_serializer bs{std::back_inserter(buf), &get_namespace()};
source_node.serialize(bs);
dest_node.serialize(bs);
bs.write(source_actor)
.write(dest_actor)
.write(uint32_t{0})
.write(static_cast<uint32_t>(operation))
.write(operation_data);
} else {
// reserve space in the buffer to write the payload later on
auto wr_pos = static_cast<ptrdiff_t>(buf.size());
char placeholder[basp::header_size];
buf.insert(buf.end(), std::begin(placeholder), std::end(placeholder));
auto pl_pos = buf.size();
{ // lifetime scope of first serializer (write payload)
binary_serializer bs1{std::back_inserter(buf), &get_namespace()};
(*pw)(bs1);
}
// write broker message to the reserved space
binary_serializer bs2{buf.begin() + wr_pos, &get_namespace()};
auto plen = static_cast<uint32_t>(buf.size() - pl_pos);
source_node.serialize(bs2);
dest_node.serialize(bs2);
bs2.write(source_actor)
.write(dest_actor)
.write(plen)
.write(static_cast<uint32_t>(operation))
.write(operation_data);
if (payload_len)
*payload_len = plen;
}
}
const_iterator begin() const
{
return buf_.begin();
}
iterator begin()
{
return buf_.begin();
}
void reset()
{
cur_ = buf_.begin();
end_ = buf_.end();
}
buffer(Elem const* from, size_t length)
: buf_(static_cast<value_type const*>(from), static_cast<value_type const*>(from)+length)
, cur_(buf_.begin())
, end_(buf_.end())
{ }
buffer(InputIterator begin, InputIterator end)
: buf_(begin, end)
, cur_(buf_.begin())
, end_(buf_.end())
{ }
buffer(Source const& source)
: buf_(source.begin(), source.end())
, cur_(buf_.begin())
, end_(buf_.end())
{ }
buffer(buffer&& source)
: buf_(std::move(source.buf_))
, cur_(buf_.begin())
, end_(buf_.end())
{ }
buffer()
: buf_()
, cur_(buf_.begin())
, end_(buf_.end())
{ }
/// fills the buffer using the generator
void fill_buffer(buffer_type& buffer)
{
for (typename buffer_type::iterator it=buffer.begin();it!=buffer.end();++it)
*it=generator_();
}