Routing

Routing patterns decide where an exchange goes next. They pick a destination, branch on content, fan out to several endpoints, or distribute load. They correspond to the Message Routing category in Hohpe and Woolf.

• Message Filter — pass or drop an exchange by predicate
• Content-Based Router — route an exchange to one of several destinations by predicate
• Dynamic Router — compute the destination at runtime from exchange content
• Recipient List — broadcast an exchange to a list of endpoints computed at runtime
• Routing Slip — attach a sequence of endpoints and route through each in order
• Scatter-Gather — broadcast to a fixed list of endpoints and collect the responses
• Wire Tap — send a copy of the exchange to a side endpoint without blocking the main flow
• Multicast — send the exchange to several destinations in parallel
• Load Balancer — distribute exchanges across destination endpoints by strategy

For the route structure that hosts these patterns, see Routes and pipelines.