/// <summary>
/// Method for creating channel from Monitor to Service. Return if server is connected or is faild to create channel.
/// </summary>
/// <param name="endpointName"> Name from endpoint configuration</param>
/// <param name="serverState"> In wich state server need to be in moment of creating </param>
/// <param name="service"> Out parametar for service</param>
/// <returns> if service is created properly </returns>
static bool ConnectToService(string endpointName, ЕStateServer serverState, out IStateService service)
{
service = null;
try
{
ChannelFactory <IStateService> serviceFactory = new ChannelFactory <IStateService>(endpointName);
service = serviceFactory.CreateChannel();
service.SetState(serverState);
return(true);
}
catch (CommunicationException ex)
{
Console.WriteLine("Error [0]: {1}", endpointName, ex.Message);
return(false);
}
}
public ConfigurationService()
{
StateService = Properties.Settings.Default.StateServer;
Console.WriteLine("Current state of server is {0}", StateService);
}
public void SetState(ЕStateServer state)
{
config.StateService = state;
}
static void Main(string[] args)
{
IStateService serviceOne = null;
IStateService serviceTwo = null;
// set primary state
if (ConnectToService("first", ЕStateServer.Primary, out serviceOne))
{
ConnectToService("second", ЕStateServer.Secondary, out serviceTwo);
}
else
{
ConnectToService("second", ЕStateServer.Primary, out serviceTwo);
}
while (true)
{
ЕStateServer stateOne = ЕStateServer.Unknown;
ЕStateServer stateTwo = ЕStateServer.Unknown;
try
{
stateOne = serviceOne.GetState();
}
catch (Exception ex)
{
Console.WriteLine("Error [first] : {0}", ex.Message);
}
try
{
stateTwo = serviceTwo.GetState();
}
catch (Exception ex)
{
Console.WriteLine("Error [second] : {0}", ex.Message);
}
Console.WriteLine("States of services : ");
Console.WriteLine("Service one - {0}.", stateOne);
Console.WriteLine("Service two - {0}.", stateTwo);
// ako su oba servisa pokrenuta nema potreba da se bilo sta radi, samo u slucaju da je jedan od njih pao
if (stateOne == ЕStateServer.Unknown || stateTwo == ЕStateServer.Unknown)
{
if (stateOne.Equals(ЕStateServer.Primary)) // u slucaju da je sekundarni pao
{
ConnectToService("second", ЕStateServer.Secondary, out serviceTwo);
}
else if (stateTwo.Equals(ЕStateServer.Primary)) // u slucaju da je sekundarni pao
{
ConnectToService("first", ЕStateServer.Secondary, out serviceOne);
}
else if (stateTwo == ЕStateServer.Secondary) // u slucaju da je primarni pao sekundarni se svicuje da bude primarni
{
serviceTwo.SetState(ЕStateServer.Primary);
Console.WriteLine("Service two is now primary,");
ConnectToService("first", ЕStateServer.Secondary, out serviceOne);
}
else if (stateOne == ЕStateServer.Secondary) // u slucaju da je primarni pao sekundarni se svicuje da bude primarni
{
serviceOne.SetState(ЕStateServer.Primary);
Console.WriteLine("Service one is now primary,");
ConnectToService("second", ЕStateServer.Secondary, out serviceTwo);
}
else // u slucaju da su oba pala
{
if (ConnectToService("first", ЕStateServer.Primary, out serviceOne))
{
ConnectToService("second", ЕStateServer.Secondary, out serviceTwo);
}
else
{
ConnectToService("second", ЕStateServer.Primary, out serviceTwo);
}
}
}
Thread.Sleep(5000);
}
}
