Making Periodic HTTP Request Using Timer

["ibcoleman@gmail.com" <ib...@gmail.com>]

I'm trying to do something which seems like it should be very simple, but
instead is turning out to be very difficult. 

I have a very straightforward REST URL that I want to poll periodically,
retrieve the JSON response, and then process that response. I managed to
successfully generate an http request based on the timer interval, but the
Message body is null when the Processor gets to it.

So I have an rsClient:




And following route:



I know I'm probably missing something simple, because almost all of the
documentation I've seen doesn't bother going into any detail, just saying,
"Client calls are trivial!"

Thanks for any help!

--Ian



--
View this message in context: http://camel.465427.n5.nabble.com/Making-Periodic-HTTP-Request-Using-Timer-tp5749336.html
Sent from the Camel - Users mailing list archive at Nabble.com.

Re: Making Periodic HTTP Request Using Timer

[Ian Coleman <ib...@gmail.com>]

On Tue, Mar 25, 2014 at 10:00 AM, Donald Whytock <dw...@apache.org>wrote:

> On Tue, Mar 25, 2014 at 7:32 AM, ibcoleman@gmail.com <ibcoleman@gmail.com
> >wrote:
>
> > I'm trying to do something which seems like it should be very simple, but
> > instead is turning out to be very difficult.
> >[...]
>


> Were you including images in that email?  Images and attachments often
> don't make it on the mailing list.
>
> Don
>

Hi Don,

Sorry, I think Nabble ate my code snippets because they were enclosed in
xml.  Let me try that again:

The client is:

<bean id="camelRouting"
class="com.wireandwheel.demonstrations.ws.routes.ServerRoutes"/>

    <cxf:rsClient id="wmataBusLineSvc"
address="http://api.wmata.com/Bus.svc/json/jRoutes?api_key=kfgpmgvfgacx98de9q3xazww"

serviceClass="com.wireandwheel.demonstrations.ws.service.RemoteService"
                  loggingFeatureEnabled="true" skipFaultLogging="true">
    </cxf:rsClient>

    <!-- The camel route context -->
    <camel:camelContext xmlns="http://camel.apache.org/schema/spring">
        <contextScan/>
        <camel:template id="camelTemplate"/>
        <camel:routeBuilder ref="camelRouting"/>
    </camel:camelContext>



And the route is:

        from("timer:aTimer?fixedRate=true&period=10s")
                .setHeader(Exchange.HTTP_METHOD, constant("GET"))
                .to("cxfrs://bean://wmataBusLineSvc")
                .to("bean:itemRetriever")
                .to("log:com.wireandwheel.demonstrations?level=INFO")
                .process(aProcessor);



I was able to get it working by switching from cxf to http4:

 from("timer:aTimer?fixedRate=true&period=10s")
                .setHeader(Exchange.HTTP_METHOD, constant("GET"))
                .to("http4://
api.wmata.com/Bus.svc/json/jRoutes?api_key=kfgpmgvfgacx98de9q3xazww")
                .unmarshal("json")
                .to("bean:wmataRoutes")
                .to("log:com.wireandwheel.demonstrations?level=INFO")
                .process(aProcessor);

Re: Making Periodic HTTP Request Using Timer

[Donald Whytock <dw...@apache.org>]

On Tue, Mar 25, 2014 at 7:32 AM, ibcoleman@gmail.com <ib...@gmail.com>wrote:

> I'm trying to do something which seems like it should be very simple, but
> instead is turning out to be very difficult.
>
> I have a very straightforward REST URL that I want to poll periodically,
> retrieve the JSON response, and then process that response. I managed to
> successfully generate an http request based on the timer interval, but the
> Message body is null when the Processor gets to it.
>
> So I have an rsClient:
>
>
>
>
> And following route:
>
>
>
> I know I'm probably missing something simple, because almost all of the
> documentation I've seen doesn't bother going into any detail, just saying,
> "Client calls are trivial!"
>
> Thanks for any help!
>
> --Ian
>

Were you including images in that email?  Images and attachments often
don't make it on the mailing list.

Don