source: source/ariba/utility/bootstrap/modules/periodicbroadcast/PeriodicBroadcast.cpp @ 4934

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// Copyright (c) 2008-2009, Institute of Telematics, UniversitÀt Karlsruhe (TH)
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// Institute of Telematics
// UniversitÀt Karlsruhe (TH)
// Zirkel 2, 76128 Karlsruhe
// Germany
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of co// [License]
// The Ariba-Underlay Copyright
//
// Copyright (c) 2008-2009, Institute of Telematics, UniversitÀt Karlsruhe (TH)
//
// Institute of Telematics
// UniversitÀt Karlsruhe (TH)
// Zirkel 2, 76128 Karlsruhe
// Germany
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
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// [License]

#include "PeriodicBroadcast.h"

namespace ariba {
namespace utility {

use_logging_cpp(PeriodicBroadcast);
const long PeriodicBroadcast::timerinterval = 1000;
const long PeriodicBroadcast::servicetimeout = 3000;
const unsigned int PeriodicBroadcast::serverport_v4 = 5634;
const unsigned int PeriodicBroadcast::serverport_v6 = 5636;

PeriodicBroadcast::PeriodicBroadcast(BootstrapInformationCallback* _callback)
        : BootstrapModule(_callback),
        server(io_service, &newRemoteServices, &newRemoteServicesMutex) {

}

PeriodicBroadcast::~PeriodicBroadcast(){
}

void PeriodicBroadcast::threadFunc(PeriodicBroadcast* obj){
        obj->io_service.run();
}

string PeriodicBroadcast::getName(){
        return "PeriodicBroadcast";
}

string PeriodicBroadcast::getInformation(){
        return "periodic broadcasting of service information";
}

bool PeriodicBroadcast::isFunctional(){
        return true;
}

void PeriodicBroadcast::start(){
        io_service_thread = new boost::thread(
                        boost::bind(&PeriodicBroadcast::threadFunc, this) );

        Timer::setInterval( timerinterval );
        Timer::start();
}

void PeriodicBroadcast::stop(){
        io_service.stop();
        io_service_thread->join();
        delete io_service_thread;
        io_service_thread = NULL;

        Timer::stop();

        boost::mutex::scoped_lock lock( localServicesMutex );
        localServices.clear();
}

void PeriodicBroadcast::publishService(string name, string info1, string info2, string info3){
        Service service;

        service.name = name;
        service.info1 = info1;
        service.info2 = info2;
        service.info3 = info3;

        boost::mutex::scoped_lock lock( localServicesMutex );
        localServices.insert( std::make_pair(name, service) );
}

void PeriodicBroadcast::revokeService(string name){
        boost::mutex::scoped_lock lock( localServicesMutex );

        ServiceList::iterator i = localServices.find( name );
        if( i != localServices.end() ) localServices.erase( name );
}

void PeriodicBroadcast::eventFunction(){
        sendLocalServices();
        updateRemoteServices();
}

void PeriodicBroadcast::sendLocalServices(){
        boost::mutex::scoped_lock lock( localServicesMutex );

        ServiceList::iterator i = localServices.begin();
        ServiceList::iterator iend = localServices.end();

        for( ; i != iend; i++)
                server.sendservice( i->second );
}

void PeriodicBroadcast::updateRemoteServices(){

        // cleanup the services that timed out
        // so they are seen of as new after timeout
        {
                boost::mutex::scoped_lock lock( remoteServicesMutex );
                bool deleted;

                do {
                        deleted = false;

                        ServiceList::iterator i = remoteServices.begin();
                        ServiceList::iterator iend = remoteServices.end();

                        for( ; i != iend; i++ ){

                                if( time(NULL) > (i->second.lastseen + servicetimeout) ){
                                        remoteServices.erase( i );
                                        deleted = true;
                                        break;
                                }
                        }

                }while(deleted);
        }

        // check if we received new services:
        // check remoteServices against newRemoteServices
        {
                boost::mutex::scoped_lock lock( newRemoteServicesMutex );
                typedef std::pair<string,Service> mapitem;

                BOOST_FOREACH( mapitem item, newRemoteServices ){

                        string name = item.first;
                        Service service = item.second;

                        ServiceList::iterator i = remoteServices.find( name );
                        if( i != remoteServices.end() ) {
                                // update the item lastseen time
                                i->second.lastseen = service.lastseen;
                                continue;
                        }

                        {
                                // insert the new item as new, lastseen has been set in the
                                // receive function, as this timer only runs in intervals
                                boost::mutex::scoped_lock lock2( remoteServicesMutex );
                                remoteServices.insert( std::make_pair(name, service) );
                        }

                        callback->onBootstrapServiceFound(name, service.info1, service.info2, service.info3);
                }

                // we have checked and transfered all new items
                newRemoteServices.clear();
        }
}

}} //namespace ariba, utility