[CAMEL-1048] allow routes to easily be enabled/disabled based on an external predicate such as queue size

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.1.0
• Assignee: Claus Ibsen
• Reporter: James Strachan
• Created: 03/Nov/08 18:21
• Updated: 07/Feb/10 09:54
• Resolved: 02/Nov/09 12:58

Description

For example we may want to do this route...

<route>
  <requires>
    <el>${broker2.queueSize('AnotherQueue') == 0}</el>
  </requires>
  <from uri="broker1:MyQueue"/>
  <to uri="broker2:AnotherQueue"/>
</route>

i.e. only implement a specific route while some predicate is true (e.g. only route while a condition is met; disable when its not met).

Maybe we need to allow endpoints to define if they are ready yet? e.g. only send to a certain queue if its got capacity?

Issue Links

• depends upon: CAMEL-1004 make it easy to start/stop routes by their definition (RouteBuilder or Route class)
• is depended upon by: CAMEL-2047 camel-jms async consumer needs dynamic mechanism to throttle message consumption
• is depended upon by: CAMEL-2048 camel-file async consumer needs dynamic mechanism to throttle message consumption