client.cpp

这是广泛使用的通信开源项目,对于大容量,高并发的通讯要求完全能够胜任,他广泛可用于网络游戏医学图像网关的高qos要求.更详细的内容可阅读相应的材料

// client.cpp,v 1.4 2003/11/22 23:21:31 parsons Exp

// ============================================================================
//
// = LIBRARY
//    TAO/examples/Advanced/ch_12
//
// = FILENAME
//    client.cpp
//
// = AUTHORS
//   Source code used in TAO has been modified and adapted from the code
//   provided in the book, "Advanced CORBA Programming with C++" by Michi
//   Henning and Steve Vinoski. Copyright 1999. Addison-Wesley, Reading,
//   MA.
//
//   Modified for TAO by Mike Moran <[e-mail]>
//
// ============================================================================

#include    "CCSC.h"        // ORB-specific
#include    <iostream>
// #include    <fstream.h>

using namespace std;

//----------------------------------------------------------------

// Generic ostream inserter for exceptions. Inserts the exception
// name, if available, and the repository ID otherwise.

#if 0   // This inserter is not needed for TAO.

static ostream &
operator<<(ostream & os, const CORBA::Exception & e)
{
    CORBA::Any tmp;
    tmp <<= e;

    CORBA::TypeCode_var tc = tmp.type();
    const char * p = tc->name();
    if (*p != '\0')
        os << p;
    else
        os << tc->id();
    return os;
}

#endif

//----------------------------------------------------------------

// Show the details for a thermometer or thermostat.

static ostream &
operator<<(ostream &os, CCS::Thermometer_ptr t)
{
    // Check for nil.
    if (CORBA::is_nil(t)) {
        os << "Cannot show state for nil reference." << endl;
        return os;
    }
    
    // Try to narrow and print what kind of device it is.
    CCS::Thermostat_var tmstat = CCS::Thermostat::_narrow(t);
    os << (CORBA::is_nil(tmstat.in()) ? "Thermometer:" : "Thermostat:")
       << endl;

    // Show attribute values.
    CCS::ModelType_var model = t->model();
    CCS::LocType_var location = t->location();
    os << "\tAsset number: " << t->asset_num() << endl;
    os << "\tModel       : " << model.in() << endl;
    os << "\tLocation    : " << location.in() << endl;
    os << "\tTemperature : " << t->temperature() << endl;

    // If device is a thermostat, show nominal temperature.
    if (!CORBA::is_nil(tmstat.in()))
        os << "\tNominal temp: " << tmstat->get_nominal() << endl;
    return os;
}

//----------------------------------------------------------------

// Show the information in a BtData struct.

static ostream &
operator<<(ostream &os, const CCS::Thermostat::BtData &btd)
{
    os << "CCS::Thermostat::BtData details:" << endl;
    os << "\trequested    : " << btd.requested << endl;
    os << "\tmin_permitted: " << btd.min_permitted << endl;
    os << "\tmax_permitted: " << btd.max_permitted << endl;
    os << "\terror_msg    : " << btd.error_msg << endl;
    return os;
}

//----------------------------------------------------------------

// Loop over the sequence of records in an EChange exception and
// show the details of each record.

static ostream &
operator<<(ostream &os, const CCS::Controller::EChange &ec)
{
    for (CORBA::ULong i = 0; i < ec.errors.length(); i++) {
        os << "Change failed:" << endl;
        os << ec.errors[i].tmstat_ref.in(); // Overloaded <<
        os << ec.errors[i].info << endl;    // Overloaded <<
    }
    return os;
}

//----------------------------------------------------------------

// Change the temperature of a thermostat.

static void
set_temp(CCS::Thermostat_ptr tmstat, CCS::TempType new_temp)
{
    if (CORBA::is_nil(tmstat))  // Don't call via nil reference
        return;

    CCS::AssetType anum = tmstat->asset_num();
    try {
        cout << "Setting thermostat " << anum
             << " to " << new_temp << " degrees." << endl;
        CCS::TempType old_nominal = tmstat->set_nominal(new_temp);
        cout << "Old nominal temperature was: "
             << old_nominal << endl;
        cout << "New nominal temperature is: "
             << tmstat->get_nominal() << endl;
    } catch (const CCS::Thermostat::BadTemp &bt) {
        cerr << "Setting of nominal temperature failed." << endl;
        cerr << bt.details << endl;             // Overloaded <<
    }
}

//----------------------------------------------------------------

int
main(int argc, char * argv[])
{
    try {
        // Initialize the ORB
        CORBA::ORB_var orb = CORBA::ORB_init(argc, argv);

        // Check arguments
        if (argc != 2) {
            cerr << "Usage: client IOR_string" << endl;
            throw 0;
        }

        // Get controller reference from argv
        // and convert to object.
        CORBA::Object_var obj = orb->string_to_object(argv[1]);
        if (CORBA::is_nil(obj.in())) {
            cerr << "Nil controller reference" << endl;
            throw 0;
        }

        // Try to narrow to CCS::Controller.
        CCS::Controller_var ctrl;
        try {
            ctrl = CCS::Controller::_narrow(obj.in());
        } catch (const CORBA::SystemException &se) {
            cerr << "Cannot narrow controller reference: "
                 << se << endl;
            throw 0;
        }
        if (CORBA::is_nil(ctrl.in())) {
            cerr << "Wrong type for controller ref." << endl;
            throw 0;
        }

        // Get list of devices
        CCS::Controller::ThermometerSeq_var list = ctrl->list();

        // Show number of devices.
        CORBA::ULong len = list->length();
        cout << "Controller has " << len << " device";
        if (len != 1)
            cout << "s";
        cout << "." << endl;

        CCS::Thermometer_var t = ctrl->create_thermometer(27, "Room 1");
        CCS::Thermostat_var ts = ctrl->create_thermostat(28, "Room 2", 48);
        CCS::Thermostat_var ts2 = ctrl->create_thermostat(30, "Room 3", 48);
        CCS::Thermostat_var ts3 = ctrl->create_thermostat(32, "Room 3", 68);
        CCS::Thermostat_var ts4 = ctrl->create_thermostat(34, "Room 3", 68);
        CCS::Thermostat_var ts5 = ctrl->create_thermostat(36, "Room 3", 48);
        cout << t->location() << endl;
        cout << ts->location() << endl;
        cout << ts2->location() << endl;
        t->remove();

        list = ctrl->list();
        // Show details for each device.
        for (CORBA::ULong i = 0; i < list->length(); i++)
            cout << list[i];
        cout << endl;
        
        // Change the location of first device in the list
        CCS::AssetType anum = list[0U]->asset_num();
        cout << "Changing location of device "
             << anum << "." << endl;
        list[0U]->location("Earth");
        // Check that the location was updated
        cout << "New details for device "
             << anum << " are:" << endl;
        cout << list[0U] << endl;

        // Find first thermostat in list.
        CCS::Thermostat_var tmstat;
        for (   CORBA::ULong i = 0;
                i < list->length() && CORBA::is_nil(tmstat.in());
                i++) {
            tmstat = CCS::Thermostat::_narrow(list[i]);
        }

        // Check that we found a thermostat on the list.
        if (CORBA::is_nil(tmstat.in())) {
            cout << "No thermostat devices in list." << endl;
        } else {
            // Set temperature of thermostat to
            // 50 degrees (should work).
            set_temp(tmstat.inout(), 50);
            cout << endl;

            // Set temperature of thermostat to
            // -10 degrees (should fail).
            set_temp(tmstat.inout(), -10);
        }

        // Look for device in Rooms Earth and HAL. This must
        // locate at least one device because we earlier changed
        // the location of the first device to Room Earth.
        cout << "Looking for devices in Earth and HAL." << endl;
        CCS::Controller::SearchSeq ss;
        ss.length(2);
        ss[0].key.loc(CORBA::string_dup("Earth"));
        ss[1].key.loc(CORBA::string_dup("HAL"));
        ctrl->find(ss);

        // Show the devices found in that room.
        for (CORBA::ULong i = 0; i < ss.length(); i++)
            cout << ss[i].device.in();          // Overloaded <<
        cout << endl;
        
        // Increase the temperature of all thermostats
        // by 40 degrees. First, make a new list (tss)
        // containing only thermostats.
        cout << "Increasing thermostats by 40 degrees." << endl;
        CCS::Controller::ThermostatSeq tss;
        for (CORBA::ULong i = 0; i < list->length(); i++) {
            tmstat = CCS::Thermostat::_narrow(list[i]);
            if (CORBA::is_nil(tmstat.in()))
                continue;                   // Skip thermometers
            len = tss.length();
            tss.length(len + 1);
            tss[len] = tmstat;
        }

        // Try to change all thermostats.
        try {
            ctrl->change(tss, 40);
        } catch (const CCS::Controller::EChange &ec) {
            cerr << ec;                     // Overloaded <<
        }
    } catch (const CORBA::Exception & e) {
        cerr << "Uncaught CORBA exception: " << e << endl;
        return 1;
    } catch (...) {
        return 1;
    }
    return 0;
}