Callback based on multiple wireTaps?

[jasonnh]

Hi,

I am trying to acheive something like the following:

But the trouble with that is the end result is dependent on destination1 and destination2 completing not just destination2.

Using onCompletion does not seem to help as that does not allow for the async WireTap.

It feels as if I need a callback based on the completion of both the wiretapped destination1 and desintation2.

Any ideas how to achieve this?

Thanks.

[davsclaus]

So the route "direct:destination3" should wait until the 2 previous routes has completed?

You could possible store a AtomicInteger as a header, which will then get copied when tapped. And then when an exchange complete it can count down the integer.

When it reaches zero they are complete and you can continue.

There may be more elegant ways, but my morning coffee isn't working at full strength yet.

[davsclaus]

You could also use a java bean to send the messages using a ProducerTemplate

http://camel.apache.org/maven/current/camel-core/apidocs/org/apache/camel/ProducerTemplate.html

It has some async methods with on completion callbacks (and a Future returned). Then you can use that to known when the message is complete. And therefore only send the messages to the 3rd destination when the previous 2 is done.