I'm using Spring.NET to connect to ActiveMQ and do some fairly simple pub sub routing. Everything works fine when my selector is a simple expression like Car='Honda' but if I try a compound expression like Car='Honda' AND Make='Pilot' I never get any matches on my subscription.

Here's the code to generate the subscription, does anyone see where I might be doing something wrong?

public bool AddSubscription(string topicName, Dictionary<string,string> selectorList, GDException exp)
        {
            try
            {
                ActiveMQTopic topic = new ActiveMQTopic(topicName);
                string selectorString = "";

                if (selectorList.Keys.Count == 0)
                {
                    // Select all items for this topic
                    selectorString = "2>1";
                }
                else
                {
                    foreach (string key in selectorList.Keys)
                    {
                        selectorString += key + " = '" + selectorList[key] + "'" + " AND ";
                    }
                    selectorString = selectorString.Remove(selectorString.Length - 5, 5);
                }

                IMessageConsumer consumer = this._subSession.CreateConsumer(topic, selectorString, false);
                if (consumer != null)
                {
                    _consumers.Add(consumer);
                    consumer.Listener += new MessageListener(HandleRecieveMessage);
                    return true;
                }
                else
                {
                    exp.SetValues("Error adding subscription, null consumer returned");
                    return false;
                }
            }
            catch (Exception ex)
            {
                exp.SetValues(ex);
                return false;
            }
        }

And then the code to send the message, which seems simple enough to me

public void SendMessage(GDPubSubMessage messageToSend)
        {
            if (!this.isDisposed)
            {
                if (_producers.ContainsKey(messageToSend.Topic))
                {
                    IBytesMessage bytesMessage = this._pubSession.CreateBytesMessage(messageToSend.Payload);
                    foreach (string key in messageToSend.MessageProperties.Keys)
                    {
                        bytesMessage.Properties.SetString(key, messageToSend.MessageProperties[key]);
                    }

                    _producers[messageToSend.Topic].Send(bytesMessage, false, (byte)255, TimeSpan.FromSeconds(1));
                }
                else
                {
                    ActiveMQTopic topic = new ActiveMQTopic(messageToSend.Topic);
                    _producers.Add(messageToSend.Topic, this._pubSession.CreateProducer(topic));
                    IBytesMessage bytesMessage = this._pubSession.CreateBytesMessage(messageToSend.Payload);
                    foreach (string key in messageToSend.MessageProperties.Keys)
                    {
                        bytesMessage.Properties.SetString(key, messageToSend.MessageProperties[key]);
                    }

                    _producers[messageToSend.Topic].Send(bytesMessage);
                }
            }
            else
            {
                throw new ObjectDisposedException(this.GetType().FullName);
            }
        }

07/102009: Update

Ok, found the problem

bytesMessage.Properties.SetString(key, messageToSend.MessageProperties[key]);

This justs sets a single property, so my messages are only being tagged with a single property, hence the combo subscription never gets hit. Anyone know how to add more properties? You'd think bytesMessage.Properties would have a Add method, but it doesn't.