/// <summary>
/// Creates an listener from the configuration.
/// </summary>
/// <param name="name">name of the instance to create</param>
/// <returns>the named instance if it exists within the configuration;
/// otherwise null</returns>
/// <remarks>Note that two subsequent calls to this method will return
/// two separate instances of the configured instance.</remarks>
public static IEventListener CreateFromConfig(string name)
{
LwesConfigurationSection config = LwesConfigurationSection.Current;
ListenerConfigurationSection namedConfig = config.Listeners[name];
if (namedConfig == null)
{
Traceable.TraceData(typeof(EventListener), TraceEventType.Verbose, () =>
{
return new object[] { String.Concat("EventListener - no configuration found for listener: ", name) };
});
return null;
}
Traceable.TraceData(typeof(EventListener), TraceEventType.Verbose, () =>
{
return new object[] { String.Concat("EventListener - configuration found for listener: ", name) };
});
if (namedConfig.UseMulticast)
{
MulticastEventListener mee = new MulticastEventListener();
mee.InitializeAll(EventTemplateDB.CreateDefault(),
IPAddress.Parse(namedConfig.AddressString),
namedConfig.Port,
namedConfig.UseParallelEmit,
namedConfig.GarbageHandling);
return mee;
}
else
{
UnicastEventListener uee = new UnicastEventListener();
uee.Initialize(EventTemplateDB.CreateDefault(),
IPAddress.Parse(namedConfig.AddressString),
namedConfig.Port,
namedConfig.UseParallelEmit,
namedConfig.GarbageHandling);
return uee;
}
}
private static IEventListener CreateFallbackListener()
{
Traceable.TraceData(typeof(EventListener), TraceEventType.Verbose, "EventListener - using fallback listener");
MulticastEventListener emitter = new MulticastEventListener();
emitter.InitializeAll(EventTemplateDB.CreateDefault()
, Constants.DefaultMulticastAddress
, Constants.CDefaultMulticastPort
, true
, ListenerGarbageHandling.Default);
return emitter;
}
