1#include <Poco/Net/NetException.h>
2
3#include <IO/ReadBufferFromPocoSocket.h>
4#include <Common/Exception.h>
5#include <Common/NetException.h>
6#include <Common/Stopwatch.h>
7
8
9namespace ProfileEvents
10{
11 extern const Event NetworkReceiveElapsedMicroseconds;
12}
13
14
15namespace DB
16{
17
18namespace ErrorCodes
19{
20 extern const int NETWORK_ERROR;
21 extern const int SOCKET_TIMEOUT;
22 extern const int CANNOT_READ_FROM_SOCKET;
23}
24
25
26bool ReadBufferFromPocoSocket::nextImpl()
27{
28 ssize_t bytes_read = 0;
29 Stopwatch watch;
30
31 /// Add more details to exceptions.
32 try
33 {
34 bytes_read = socket.impl()->receiveBytes(internal_buffer.begin(), internal_buffer.size());
35 }
36 catch (const Poco::Net::NetException & e)
37 {
38 throw NetException(e.displayText() + ", while reading from socket (" + peer_address.toString() + ")", ErrorCodes::NETWORK_ERROR);
39 }
40 catch (const Poco::TimeoutException &)
41 {
42 throw NetException("Timeout exceeded while reading from socket (" + peer_address.toString() + ")", ErrorCodes::SOCKET_TIMEOUT);
43 }
44 catch (const Poco::IOException & e)
45 {
46 throw NetException(e.displayText() + ", while reading from socket (" + peer_address.toString() + ")", ErrorCodes::NETWORK_ERROR);
47 }
48
49 if (bytes_read < 0)
50 throw NetException("Cannot read from socket (" + peer_address.toString() + ")", ErrorCodes::CANNOT_READ_FROM_SOCKET);
51
52 /// NOTE: it is quite inaccurate on high loads since the thread could be replaced by another one
53 ProfileEvents::increment(ProfileEvents::NetworkReceiveElapsedMicroseconds, watch.elapsedMicroseconds());
54
55 if (bytes_read)
56 working_buffer.resize(bytes_read);
57 else
58 return false;
59
60 return true;
61}
62
63ReadBufferFromPocoSocket::ReadBufferFromPocoSocket(Poco::Net::Socket & socket_, size_t buf_size)
64 : BufferWithOwnMemory<ReadBuffer>(buf_size), socket(socket_), peer_address(socket.peerAddress())
65{
66}
67
68bool ReadBufferFromPocoSocket::poll(size_t timeout_microseconds)
69{
70 return offset() != buffer().size() || socket.poll(timeout_microseconds, Poco::Net::Socket::SELECT_READ | Poco::Net::Socket::SELECT_ERROR);
71}
72
73}
74