> So the missing bit of functionality is to be able to mark operations
> on your bean as being asynchronous; so that the client side doesn't
> block waiting for the results.
No I'm not sure that's what I mean. I want the route to place onto the
2nd (or nth) JMS queue after a bean invocation, but not have the route
wait for the consumer of that JMS queue to return. So the placing on
the "to" is async not the consuming, or is this the same thing? Does
that seem like a reasonable thing to be trying to do?
So it would be something like:
from("test-jms:queue:test.queue")
.beanRef("tradingService", "trade")
.choice().when(header("distribute").isEqualTo(true)).to("test-jms:queue:data.distribution.queue",
ExchangePattern.InOnly) //PATTERN SPECIFIED HERE
.end();
from("test-jms:queue:data.distribution.queue")
.beanRef("distributionService", "distribute");
As this hasn't already been required by Camel developers I'm thinking
that maybe I am going about this the wrong way? I think what I am after
is just a routing slip, but some parts of the route are just drops onto
queues which are processed async without a reply. My use case is that a
queue consumer process trades and gives back a response (a buyer id and
price). Depending on the type of trade there may be a need to trasmit
data to an external client. As this is a long running process it should
not block, as the original caller is waiting for the trade result.
Ideally "tradingService" should not be aware of the different types of
trade outcomes, which is why I am attempting to use a choice based on
headers sent in.
I have also found that when using InOut and having both bean signatures
as 'void' then BOTH the client and server fail with:
2008-03-31 16:47:32,421 DEBUG
[org.apache.camel.component.jms.JmsProducer] Future timed out
I can see both bean consumers for each JMS queue are executing through
logging. The timeout makes sense as there is no Out to be sent back.
This seems like expected behavious (altough should this log statement's
level be debug?), so it would be nice if Camel could detect that you
have specified InOut on a route that cannot return.
Thank you for assisting me whilst I learn Camel.
Martin.
