private string[] _GetPeers(Global global, string sService, string sVariable)
{
string[] sPeerAddresses = null;
if (global.bP2PMaster)
{
// this is P2P master => call directly GetPeers
sPeerAddresses = global.GetPeers(sService, sVariable);
}
else
{
// ask P2P master for all peers publishing variable
try
{
// initialize service proxy
HermesMiddleware.DataAcquisitionServiceProxy.DataAcquisitionService serviceProxy = new HermesMiddleware.DataAcquisitionServiceProxy.DataAcquisitionService();
serviceProxy.Url = "http://" + global.sP2PMaster + ":" + global.portNumber + global.sVirtRoot + global.sASMX;
// call service proxy
sPeerAddresses = serviceProxy.GetPeers(sService, sVariable);
}
catch (Exception exp)
{
Console.WriteLine(exp);
}
}
return(sPeerAddresses);
}
public override HermesMiddleware.DataAcquisitionServiceServer.SensorData[] Query(string service, [System.Xml.Serialization.XmlElementAttribute("expressions")] HermesMiddleware.DataAcquisitionServiceServer.ExpressionType[] expressions, bool delegateCall)
{
ArrayList sensorDataArray = new ArrayList();
if (expressions == null || expressions.Length == 0 || expressions[0].Items == null)
{
return(null);
}
// get global stuff (cross-application-domain)
Global global = (Global)Global.GetObject(Global.sClassName, Global.port);
// get addresses of peers publishing the variable
string[] sPeerAddresses = _GetPeers(global, service, expressions[0].Items[0].variable);
if (expressions[0].Items[0].variable == "x" || expressions[0].Items[0].variable == "y" || expressions[0].Items[0].variable == "z")
{
sPeerAddresses = _GetPeers(global, service, "Position");
}
if (sPeerAddresses != null)
{
foreach (string sPeerAddress in sPeerAddresses)
{
// get first part of name (e.g. PCC085C.us008.siemens.net)
string[] sParts = sPeerAddress.Split('.');
if (String.Compare(sParts[0], Environment.MachineName, true) == 0)
{
// peer is this machine => perform query
global.Query(service, expressions, ref sensorDataArray);
}
else
{
if (delegateCall)
{
try
{
// peer is different machine => delegate it to its DataAcquisitionService
// initialize service proxy
HermesMiddleware.DataAcquisitionServiceProxy.DataAcquisitionService serviceProxy = new HermesMiddleware.DataAcquisitionServiceProxy.DataAcquisitionService();
serviceProxy.Url = "http://" + sPeerAddress + ":" + global.portNumber + global.sVirtRoot + global.sASMX;
HermesMiddleware.DataAcquisitionServiceProxy.ExpressionType[] tmpExpressions = new HermesMiddleware.DataAcquisitionServiceProxy.ExpressionType[expressions.Length];
for (int i = 0; i < expressions.Length; i++)
{
tmpExpressions[i] = ConvertServer2Proxy(expressions[i]);
}
// call query (false = do not delegate further)
HermesMiddleware.DataAcquisitionServiceProxy.SensorData[] sensorDataProxy = serviceProxy.Query(service, tmpExpressions, false);
HermesMiddleware.DataAcquisitionServiceServer.SensorData[] tmpSensorData = this.ConvertProxy2Server(sensorDataProxy);
if (tmpSensorData != null && tmpSensorData.Length > 0)
{
// add data to array
foreach (HermesMiddleware.DataAcquisitionServiceServer.SensorData data in tmpSensorData)
{
sensorDataArray.Add(data);
}
}
}
catch (Exception exp)
{
Console.WriteLine(exp);
}
}
}
}
}
// copy result to simple array
HermesMiddleware.DataAcquisitionServiceServer.SensorData[] sensorData = new HermesMiddleware.DataAcquisitionServiceServer.SensorData[sensorDataArray.Count];
for (int i = 0; i < sensorDataArray.Count; i++)
{
sensorData[i] = (HermesMiddleware.DataAcquisitionServiceServer.SensorData)sensorDataArray[i];
}
return(sensorData);
}
public override void Unsubscribe(string service, [System.Xml.Serialization.XmlElementAttribute("subscriptions")] HermesMiddleware.DataAcquisitionServiceServer.Subscription[] subscriptions, bool delegateCall)
{
// get global stuff (cross-application-domain)
Global global = (Global)Global.GetObject(Global.sClassName, Global.port);
// get addresses of peers (variable is null => we want all peers for given service)
string[] sPeerAddresses = _GetPeers(global, service, null);
if (sPeerAddresses != null)
{
foreach (string sPeerAddress in sPeerAddresses)
{
// get first part of name (e.g. PCC085C.us008.siemens.net)
string[] sParts = sPeerAddress.Split('.');
if (String.Compare(sParts[0], Environment.MachineName, true) == 0)
{
// peer is this machine => remove subscriptions
foreach (HermesMiddleware.DataAcquisitionServiceServer.Subscription subscription in subscriptions)
{
// remove subscriber
global.RemoveSubscriber(subscription.GUID);
}
}
else
{
if (delegateCall)
{
try
{
// peer is different machine => delegate it to its DataAcquisitionService
// initialize service proxy
HermesMiddleware.DataAcquisitionServiceProxy.DataAcquisitionService serviceProxy = new HermesMiddleware.DataAcquisitionServiceProxy.DataAcquisitionService();
serviceProxy.Url = "http://" + sPeerAddress + ":" + global.portNumber + global.sVirtRoot + global.sASMX;
HermesMiddleware.DataAcquisitionServiceProxy.Subscription[] tmpSubscriptions = new HermesMiddleware.DataAcquisitionServiceProxy.Subscription[subscriptions.Length];
for (int i = 0; i < subscriptions.Length; i++)
{
tmpSubscriptions[i] = ConvertServer2Proxy(subscriptions[i]);
}
// unsubscribe
serviceProxy.Unsubscribe(service, tmpSubscriptions, false);
}
catch (Exception exp)
{
Console.WriteLine(exp);
}
}
}
}
}
}
