The Message Router component must have knowledge of all possible destination channels in order to send the message to the correct channel. If the list of possible destinations changes frequently, the Message Router can turn into a maintenance bottleneck. In those cases, it would be better to let the individual recipients decide which messages they are interested in. You can accomplish this by using a Publish-Subscribe Channel (106) and an array of Message Filters (237). We contrast these two alternatives by calling them predictive routing and reactive filtering
