apps/tutorials/vostut7server.cc

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/* Seventh VOS tutorial.  Creating your own MetaObjects

   This tutorial covers:
   - Using our Hello metaobject
   - The VOS logging facility

   This file (vostut7server.cc) is released into the public domain.  No
   restrictions are placed on its use, distribution or inclusion into
   other works.
*/

// Bring in the definitions of various "Hello" metaobject classes.
#include "vostut7hello.hh"

int main(int, char**)
{
    cout << "VOS Tutorial 7 Server\n\n";

    Hello::registerExtenders();

    LocalSocketSite site(&NoAccessControl::static_);
    site.setTimeoutOnSelect(-1);


    /* The preferred way to write out logging messages for debugging
       and user notification is to use the VOS logging facility.  This
       facility allows for many separate logging channels which can be
       individually adjusted to be more or less verbose.  The way this
       works is simple: each log message consists of the log channel,
       the log level, and the message itself.  The log level of the
       statement is compared against the channel log level, and if the
       statement level is equal to or lower than the current level it
       is printed out.  The log levels run from 0 to 5, where level 0
       is reserved for only the absolutely most important messages and
       5 is used for debugging that will quickly spam your display
       with junk.  The default level is 2.  Debugging statements
       should generally be at level 3 or 4.

       Note that if the message doesn't have a good enough log level,
       the actual output (eg foo << bar << baz) will never be never
       executed, so disabled logging statement are efficiently
       overlooked.
     */
    LOG("helloserver", 1, "started server at " << site.getURL().getString());


    vRef<MetaObject> mobj = site.createMetaObject("hello", typeid(Hello).name(), 0);


    // Extract the "Hello" interface

    Hello& h = MetaObject::meta_cast<Hello&>(*mobj);


    // Now call the hello() method (same as in the client!)

    string s = h.hello("I feel like I'm talking to myself.");


    LOG("helloserver", 1, "Called hello locally and got this back: '" << s  << "'");

    while(true) {
        site.flushIncomingBuffers();
    }
}

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