c->add_callback(new_connection,bind(&command_client::read_hello, boost::ref(*this)));
// don't expect hello from an always closed connection (like dummy_client_connection)
- if (!c->is_closed())
- read_hello();
+ if (!is_connection_closed())
+ {
+ try
+ {
+ read_hello();
+ }
+ catch (t2n_communication_error &e)
+ {
+ c->close();
+
+ // store a copy of the exception that you can find out details about the error later
+ std::auto_ptr<t2n_exception> tmp(e.clone());
+ constructorException=tmp;
+ }
+ catch (...)
+ {
+ throw;
+ }
+ }
}
/** @brief replace the connection currently in use with a new one
-
@param _c pointer to the new connection
@note the old connection must still be valid when this method is called,
read_hello();
}
+/** @brief return a complete packet
+ @param usec_timeout maximum microseconds to wait until the packet is complete
+ @retval packet data as std::string
+
+ @note throws a t2n_transfer_error if the timeout is exceeded
+*/
std::string command_client::read_packet(const long long &usec_timeout)
{
string resultpacket;
return resultpacket;
}
+/** @brief read and check the hello message at the beginning of a connection
+
+ @note throws exceptions if something went wrong
+*/
void command_client::read_hello()
{
string resultpacket;
throw t2n_version_mismatch("illegal hello received (incomplete): "+resultpacket);
}
-bool command_client::check_hello(const string& hellostr)
+/** @brief check if a hello message is valid
+ @param hellostr std::string with the message to check
+ @retval true if the hello is good and complete
+
+ @note you can check incomplete hellos. you will get a false return value
+ but no exception. throws exceptions as soon as something is wrong.
+*/
+bool command_client::check_hello(const std::string& hellostr)
{
istringstream hello(hellostr);
return true;
}
+/** @brief send a command to the server and store the result
+ @param cmd pointer to a command-object
+ @param[out] res result container to store the result in
+
+ @note you can check incomplete hellos. you will get a false return value
+ but no exception. throws exceptions as soon as something is wrong.
+*/
void command_client::send_command(command* cmd, result_container &res)
{
ostringstream ofs;
command_container cc(cmd);
boost::archive::binary_oarchive oa(ofs);
+ if (is_connection_closed())
+ throw t2n_transfer_error("connection to server is closed");
+
try
{
oa << cc;