Callbacks for Messages Addressed to Handlers

After the ToolTalk service determines the receiver for a message addressed to a handler, it matches the message against any patterns registered by the receiver. (Messages explicitly addressed to handlers are point-to-point messages and do not use pattern matching.)

• If the message does not match a pattern, the message is delivered in the normal manner.

• If the message is matched to a pattern, any callbacks attached to the pattern are run.