private void init(string host, int port)
{
ReceivedNumber = 0;
isFinished = false;
ReceivedMessages = new List<string>();
ListionTopics = new List<string>();
Uri uriSample = new Uri("activemq:tcp://" + host + ":" + port);
ConnectionFactory confSample = new ConnectionFactory(uriSample);
connection = (Connection)confSample.CreateConnection();
connection.Start();
session = (Session)connection.CreateSession();
}