public ServiceEnvironmentEventListener ListenForEvents(params ServiceEnvironmentEventType[] eventTypes)
{
ServiceEnvironmentEventListener listener = new ServiceEnvironmentEventListener(this, eventTypes);
RegisterEventListener(listener);
return(listener);
}
internal void UnregisterEventListener(ServiceEnvironmentEventListener listener)
{
var env = EnvironmentConfiguration;
using (var connection = new SqlConnection(env.ConnectionString))
{
connection.Open();
var command = new SqlCommand(env.SP_EnvironmentEventListenerUnregister, connection)
{
CommandType = CommandType.StoredProcedure
};
command.Parameters.AddWithValue("@listenerID", listener.ListenerID.ToString("N"));
command.ExecuteNonQuery();
}
}
internal void RegisterEventListener(ServiceEnvironmentEventListener listener)
{
var env = EnvironmentConfiguration;
using (var connection = new SqlConnection(env.ConnectionString))
{
connection.Open();
using (SqlTransaction transaction = connection.BeginTransaction())
{
try
{
var command = new SqlCommand(env.SP_EnvironmentEventListenerRegister, connection, transaction)
{
CommandType = CommandType.StoredProcedure
};
foreach (ServiceEnvironmentEventType eventType in listener.EventTypes)
{
command.Parameters.AddWithValue("@listenerID", listener.ListenerID.ToString("N"));
command.Parameters.AddWithValue("@eventType", eventType.ToString());
command.Parameters.AddWithValue("@endpointName", listener.WcfHost.Description.Endpoints.First(endpoint => endpoint.Name == typeof(ServiceEnvironmentEventListener).FullName).Name);
command.Parameters.AddWithValue("@endpointAddress", listener.WcfHost.Description.Endpoints.First(endpoint => endpoint.Name == typeof(ServiceEnvironmentEventListener).FullName).Address.ToString());
command.ExecuteNonQuery();
}
transaction.Commit();
}
catch (Exception ex)
{
try { transaction.Rollback(); }
catch { }
listener.Close(false);
throw new ServiceEnvironmentException("Could not register listener in environment database. The listener has been closed. See inner exception for details.", ex);
}
}
}
}
