Pro BizTalk 2006

Chapter 3. Thinking Inside the Box

The BizTalk Messagebox is the core of the messaging subsystem. It has the responsibility of storing all message items within the product. The Message Bus subsystem queries the Messagebox and looks for messages that match a subscription. The BizTalk Message Bus is a publisher/subscriber model, or pub/sub. Simply stated, every message going into the Messagebox is "published" so that endpoints with matching message subscriptions can receive the message and send it to the appropriate orchestration or send port and finally to the corresponding adapter. Each BizTalk process that runs on a machine has something called the Message Agent, which is responsible for searching for messages that match subscriptions and routing ...