namespace Environment {
+/* -------------------------------------------------------------------------------- */
+
+class LiveMetarProperties : public MetarProperties {
+public:
+ LiveMetarProperties( SGPropertyNode_ptr rootNode );
+ virtual ~LiveMetarProperties();
+ virtual void update( double dt );
+
+ virtual double getTimeToLive() const { return _timeToLive; }
+ virtual void setTimeToLive( double value ) { _timeToLive = value; }
+private:
+ double _timeToLive;
+
+};
+
+typedef SGSharedPtr<LiveMetarProperties> LiveMetarProperties_ptr;
+
+LiveMetarProperties::LiveMetarProperties( SGPropertyNode_ptr rootNode ) :
+ MetarProperties( rootNode ),
+ _timeToLive(0.0)
+{
+ _tiedProperties.Tie("time-to-live", &_timeToLive );
+}
+
+LiveMetarProperties::~LiveMetarProperties()
+{
+}
+
+void LiveMetarProperties::update( double dt )
+{
+ _timeToLive -= dt;
+ if( _timeToLive < 0.0 ) _timeToLive = 0.0;
+}
+
+/* -------------------------------------------------------------------------------- */
+
class BasicRealWxController : public RealWxController
{
public:
bool _enabled;
bool __enabled;
TiedPropertyList _tiedProperties;
- MetarProperties _metarProperties;
+ ; typedef std::vector<LiveMetarProperties_ptr> MetarPropertiesList;
+ MetarPropertiesList _metarProperties;
};
/* -------------------------------------------------------------------------------- */
_ground_elevation_n( fgGetNode( "/position/ground-elev-m", true )),
_max_age_n( fgGetNode( "/environment/params/metar-max-age-min", false ) ),
_enabled(true),
- __enabled(false),
- _metarProperties( fgGetNode( rootNode->getStringValue("metar", "/environment/metar"), true ) )
+ __enabled(false)
{
+ // at least instantiate MetarProperties for /environment/metar
+ _metarProperties.push_back( new LiveMetarProperties(
+ fgGetNode( rootNode->getStringValue("metar", "/environment/metar"), true ) ) );
+
+ PropertyList metars = rootNode->getChildren("metar");
+ for( PropertyList::size_type i = 1; i < metars.size(); i++ ) {
+ SG_LOG( SG_ALL, SG_INFO, "Adding metar properties at " << metars[i]->getStringValue() );
+ _metarProperties.push_back( new LiveMetarProperties(
+ fgGetNode( metars[i]->getStringValue(), true )));
+ }
}
BasicRealWxController::~BasicRealWxController()
void BasicRealWxController::update( double dt )
{
if( _enabled ) {
- update( !__enabled, dt );
+ bool firstIteration = !__enabled; // first iteration after being enabled?
+
+ // clock tick for every METAR in stock
+ for( MetarPropertiesList::iterator it = _metarProperties.begin();
+ it != _metarProperties.end(); it++ ) {
+ // first round? All received METARs are outdated
+ if( firstIteration ) (*it)->setTimeToLive( 0.0 );
+ (*it)->update(dt);
+ }
+
+ update( firstIteration, dt );
__enabled = true;
} else {
__enabled = false;
class MetarLoadRequest {
public:
- MetarLoadRequest( const string & stationId ) {
- _stationId = stationId;
- _proxyHost = fgGetNode("/sim/presets/proxy/host", true)->getStringValue();
- _proxyPort = fgGetNode("/sim/presets/proxy/port", true)->getStringValue();
- _proxyAuth = fgGetNode("/sim/presets/proxy/authentication", true)->getStringValue();
- }
+ MetarLoadRequest( const string & stationId ) :
+ _stationId(stationId),
+ _proxyHost(fgGetNode("/sim/presets/proxy/host", true)->getStringValue()),
+ _proxyPort(fgGetNode("/sim/presets/proxy/port", true)->getStringValue()),
+ _proxyAuth(fgGetNode("/sim/presets/proxy/authentication", true)->getStringValue())
+ {}
+ MetarLoadRequest( const MetarLoadRequest & other ) :
+ _stationId(other._stationId),
+ _proxyHost(other._proxyAuth),
+ _proxyPort(other._proxyPort),
+ _proxyAuth(other._proxyAuth)
+ {}
string _stationId;
string _proxyHost;
string _proxyPort;
string _proxyAuth;
private:
};
+
+ class MetarLoadResponse {
+ public:
+ MetarLoadResponse( const string & stationId, const string metar ) {
+ _stationId = stationId;
+ _metar = metar;
+ }
+ MetarLoadResponse( const MetarLoadResponse & other ) {
+ _stationId = other._stationId;
+ _metar = other._metar;
+ }
+ string _stationId;
+ string _metar;
+ };
private:
- double _metarTimeToLive;
double _positionTimeToLive;
- double _minimumRequestInterval;
-
- SGPropertyNode_ptr _metarDataNode;
- SGPropertyNode_ptr _metarValidNode;
- SGPropertyNode_ptr _metarStationIdNode;
-
+ double _requestTimer;
#if defined(ENABLE_THREADS)
class MetarLoadThread : public OpenThreads::Thread {
MetarLoadThread( long maxAge );
void requestMetar( const MetarLoadRequest & metarRequest, bool background = true );
bool hasMetar() { return _responseQueue.size() > 0; }
- string getMetar() { return _responseQueue.pop(); }
+ MetarLoadResponse getMetar() { return _responseQueue.pop(); }
virtual void run();
private:
void fetch( const MetarLoadRequest & );
long _maxAge;
+ long _minRequestInterval;
SGBlockingQueue <MetarLoadRequest> _requestQueue;
- SGBlockingQueue <string> _responseQueue;
+ SGBlockingQueue <MetarLoadResponse> _responseQueue;
};
MetarLoadThread * _metarLoadThread;
NoaaMetarRealWxController::NoaaMetarRealWxController( SGPropertyNode_ptr rootNode ) :
BasicRealWxController(rootNode),
- _metarTimeToLive(0.0),
_positionTimeToLive(0.0),
- _minimumRequestInterval(0.0),
- _metarDataNode(_metarProperties.get_root_node()->getNode("data",true)),
- _metarValidNode(_metarProperties.get_root_node()->getNode("valid",true)),
- _metarStationIdNode(_metarProperties.get_root_node()->getNode("station-id",true))
+ _requestTimer(0.0)
{
#if defined(ENABLE_THREADS)
_metarLoadThread = new MetarLoadThread(getMetarMaxAgeMin());
void NoaaMetarRealWxController::update( bool first, double dt )
{
- _metarTimeToLive -= dt;
_positionTimeToLive -= dt;
- _minimumRequestInterval -= dt;
-
- bool valid = _metarValidNode->getBoolValue();
- string stationId = valid ? _metarStationIdNode->getStringValue() : "";
+ _requestTimer -= dt;
- if( first ) _metarTimeToLive = 0.0;
-
- if( _metarTimeToLive <= 0.0 ) {
- valid = false;
- _metarTimeToLive = 900;
- _positionTimeToLive = 0;
- }
-
- if( _positionTimeToLive <= 0.0 || valid == false ) {
+ if( _positionTimeToLive <= 0.0 ) {
+ // check nearest airport
+ SG_LOG(SG_ALL, SG_INFO, "NoaaMetarRealWxController::update(): (re) checking nearby airport with METAR" );
_positionTimeToLive = 60.0;
SGGeod pos = SGGeod::fromDeg(_longitude_n->getDoubleValue(), _latitude_n->getDoubleValue());
return;
}
- if( stationId != nearestAirport->ident() ) {
- valid = false;
- stationId = nearestAirport->ident();
+ SG_LOG(SG_ALL, SG_INFO,
+ "NoaaMetarRealWxController::update(): nearest airport with METAR is: " << nearestAirport->ident() );
+
+ // if it has changed, invalidate the associated METAR
+ if( _metarProperties[0]->getStationId() != nearestAirport->ident() ) {
+ SG_LOG(SG_ALL, SG_INFO,
+ "NoaaMetarRealWxController::update(): nearest airport with METAR has changed. Old: '" <<
+ _metarProperties[0]->getStationId() <<
+ "', new: '" << nearestAirport->ident() << "'" );
+ _metarProperties[0]->setStationId( nearestAirport->ident() );
+ _metarProperties[0]->setTimeToLive( 0.0 );
}
-
}
-
- if( !valid ) {
- if( _minimumRequestInterval <= 0 && stationId.length() > 0 ) {
- MetarLoadRequest request( stationId );
- // load the first metar in the foreground to make sure a metar is received
- // before the automatic runway selection code runs. All subsequent calls
- // run in the background
- _metarLoadThread->requestMetar( request, !first );
- _minimumRequestInterval = 10;
+
+ if( _requestTimer <= 0.0 ) {
+ _requestTimer = 10.0;
+
+ for( MetarPropertiesList::iterator it = _metarProperties.begin();
+ it != _metarProperties.end(); it++ ) {
+
+ if( (*it)->getTimeToLive() > 0.0 ) continue;
+ const std::string & stationId = (*it)->getStationId();
+ if( stationId.empty() ) continue;
+
+ SG_LOG(SG_ALL, SG_INFO,
+ "NoaaMetarRealWxController::update(): spawning load request for station-id '" << stationId << "'" );
+
+ MetarLoadRequest request( stationId );
+ // load the metar for the neares airport in the foreground if the fdm is uninitialized
+ // to make sure a metar is received
+ // before the automatic runway selection code runs. All subsequent calls
+ // run in the background
+ bool background = fgGetBool("/sim/fdm-initialized", false ) || it != _metarProperties.begin();
+ _metarLoadThread->requestMetar( request, background );
}
}
- if( _metarLoadThread->hasMetar() ) {
- string metar = _metarLoadThread->getMetar();
- SG_LOG( SG_ALL, SG_ALERT, "NoaaMetarRwalWxController::update() received METAR " << metar );
- _metarDataNode->setStringValue( metar );
+ // pick all the received responses from the result queue and update the associated
+ // property tree
+ while( _metarLoadThread->hasMetar() ) {
+ MetarLoadResponse metar = _metarLoadThread->getMetar();
+ SG_LOG( SG_ALL, SG_INFO, "NoaaMetarRwalWxController::update() received METAR for " << metar._stationId << ": " << metar._metar );
+ for( MetarPropertiesList::iterator it = _metarProperties.begin();
+ it != _metarProperties.end(); it++ ) {
+ if( (*it)->getStationId() != metar._stationId )
+ continue;
+ (*it)->setTimeToLive(900);
+ (*it)->setMetar( metar._metar );
+ }
}
-
-
}
/* -------------------------------------------------------------------------------- */
#if defined(ENABLE_THREADS)
NoaaMetarRealWxController::MetarLoadThread::MetarLoadThread( long maxAge ) :
- _maxAge(maxAge)
+ _maxAge(maxAge),
+ _minRequestInterval(2000)
{
}
void NoaaMetarRealWxController::MetarLoadThread::run()
{
+ SGTimeStamp lastRun = SGTimeStamp::fromSec(0);
for( ;; ) {
+ SGTimeStamp dt = SGTimeStamp::now() - lastRun;
+
+ if( dt.getSeconds() * 1000 < _minRequestInterval )
+ microSleep( (_minRequestInterval - dt.getSeconds() * 1000 ) * 1000 );
+
+ lastRun = SGTimeStamp::now();
+
const MetarLoadRequest request = _requestQueue.pop();
if( request._stationId.size() == 0 )
break;
fetch( request );
+
}
}
try {
result = new FGMetar( request._stationId, request._proxyHost, request._proxyPort, request._proxyAuth );
+ _minRequestInterval = 2000;
} catch (const sg_io_exception& e) {
SG_LOG( SG_GENERAL, SG_WARN, "NoaaMetarRealWxController::fetchMetar(): can't get METAR for "
<< request._stationId << ":" << e.getFormattedMessage().c_str() );
+ _minRequestInterval += _minRequestInterval/2;
+ if( _minRequestInterval > 30000 )
+ _minRequestInterval = 30000;
return;
}
return;
}
- _responseQueue.push( metar );
+ MetarLoadResponse response( request._stationId, metar );
+ _responseQueue.push( response );
}
#endif
projects / flightgear.git / blobdiff