lsst::ctrl::events::Host Class Reference

This object represents the host that is being used to transmit events, giving quick access to often-used host information. More...

#include <Host.h>

Public Member Functions
unsigned int const	getIPAddress ()
	get the IP address More...
std::string const &	getHostName ()
	get the host name More...

Static Public Member Functions
static Host const &	getHost ()
	get the Host object, which can access the host and ip address. More...

Static Protected Attributes
static Host *	thisHost = 0
static std::string	_hostname
static unsigned int	_IPAddr = 0

Detailed Description

This object represents the host that is being used to transmit events, giving quick access to often-used host information.

Definition at line 48 of file Host.h.

Member Function Documentation

Host const & lsst::ctrl::events::Host::getHost ( )

static

get the Host object, which can access the host and ip address.

Returns

The Host object

Definition at line 49 of file Host.cc.

                          {
    if (thisHost == 0) {

        // create the _IPAddr here, rather than
        // reconstructing it every time we create an
        // identificationId

        long int host_len = sysconf(_SC_HOST_NAME_MAX)+1; // add one for the null

        std::vector<char> vec;
        vec.resize(host_len);

        struct hostent *ent;
        unsigned char a,b,c,d;

        if (gethostname(vec.data(), vec.size()) == 0) {
            _hostname = std::string(vec.data());
        } else {
            std::string msg("call to gethostname() failed");
            throw LSST_EXCEPT(pexExceptions::RuntimeError, msg);
        }

        ent = (struct hostent *)gethostbyname(_hostname.c_str());
        if (ent == NULL) {
            std::string msg("call to gethostbyname() failed");
            throw LSST_EXCEPT(pexExceptions::RuntimeError, msg);
        }

        a = ent->h_addr_list[0][0] & 0xFF;
        b = ent->h_addr_list[0][1] & 0xFF;
        c = ent->h_addr_list[0][2] & 0xFF;
        d = ent->h_addr_list[0][3] & 0xFF;

        _IPAddr = (a << 24) | (b << 16) | (c << 8) | d;
  
        // create the default EventSystem object
        thisHost = new Host();
    }
    return *thisHost;

}

std::string const & lsst::ctrl::events::Host::getHostName

(

)

get the host name

Returns

a std::string containing the name of the hsot

Definition at line 99 of file Host.cc.

                                   {
    return _hostname;
}

unsigned int const lsst::ctrl::events::Host::getIPAddress

(

)

get the IP address

Returns

an integer representing the IP address

Definition at line 95 of file Host.cc.

                                      {
    return _IPAddr;
}

Member Data Documentation

std::string lsst::ctrl::events::Host::_hostname

staticprotected

Definition at line 72 of file Host.h.

unsigned int lsst::ctrl::events::Host::_IPAddr = 0

staticprotected

Definition at line 73 of file Host.h.

Host * lsst::ctrl::events::Host::thisHost = 0

staticprotected

Definition at line 70 of file Host.h.

---

The documentation for this class was generated from the following files:

• /home/lsstsw/stack/Linux64/ctrl_events/11.0-2-g68503cd/include/lsst/ctrl/events/Host.h
• /home/lsstsw/stack/Linux64/ctrl_events/11.0-2-g68503cd/src/Host.cc