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From: Quinn Stevenson <quinn@pronoia-solutions.com>
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Subject: Re: How to use the InOut (Request-Reply) pattern in combination with
 REST/Jetty?
Date: Mon, 28 Nov 2016 09:35:57 -0700
References: <583821AC.7080205@fau.de> <583BE1F6.8030301@fau.de>
To: users@camel.apache.org
In-Reply-To: <583BE1F6.8030301@fau.de>
Message-Id: <74AAD8A5-B797-456B-8D21-CEC02F2E7A52@pronoia-solutions.com>
archived-at: Mon, 28 Nov 2016 16:36:26 -0000

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Yes - this is possible.  Look at "Request-Reply=E2=80=9D in the JMS docs =
( http://camel.apache.org/jms.html <http://camel.apache.org/jms.html> ).


> On Nov 28, 2016, at 12:51 AM, Frank Wein <frank.wein@fau.de> wrote:
>=20
> Hi all,
> some additional info/Java code: What I have currently working is some =
code without the ActiveMQ part:
>=20
> restConfiguration().component("jetty").host("0.0.0.0").port(8080)
>                .dataFormatProperty("prettyPrint", "true")
>                .bindingMode(RestBindingMode.auto);
>=20
>       rest("/API/").get("/object/{ID}/").to("direct:objectGet");
>=20
>        from("direct:objectGet")
>                 .setExchangePattern(ExchangePattern.InOut)
>                 .setHeader(Exchange.HTTP_PATH, simple(
> "/Webservice/RESTService/Object/${header.ID}"))
>                 .setHeader(Exchange.HTTP_METHOD, simple("GET"))
> .to("jetty://http://localhost:8888?bridgeEndpoint=3Dtrue");
>=20
> I send my REST request to localhost:8080/object/[ID]/ and get back the =
reply from the other webservice running on localhost:8888.
>=20
> Now, I want to include an ActiveMQ queue here. Basically the ActiveMQ =
queue should be between the two routes (from/to("direct:objectGet")). =
The first route should send the message to the queue, the second route =
should fetch it, get the response from the other web service and send =
the response back via the queue to the first route. This one should then =
reply to the incoming REST request. Is this possible, if yes, how? My =
attempts at this did not really work.
>=20
> Regards
> Frank
>=20
>=20
> Frank Wein wrote:
>> Hi all,
>> I have a problem setting up the correct Camel routes in Java for a =
problem I'm having. I'm still quite new to Camel and ActiveMQ, so please =
be patient with me :)
>>=20
>> What I want to accomplish is the following:
>> * Provide a REST (HTTP GET) endpoint with Camel (Jetty) and send the =
request (message) to an ActiveMQ queue (the ActiveMQ queue is a =
requirement, probably would be easier without)
>> * Consume the message (with a second route?), take some of the =
parameters from the HTTP URL (so message properties) and send a =
HTTP/REST request to another REST service.
>> * Take the response from the other REST service and send it back to =
the REST client (from the beginning)
>=20
>=20
> --=20
> Frank Wein
> Forschungsgruppe Netz
> Friedrich-Alexander-Universitaet Erlangen-Nuernberg
> Regionales Rechenzentrum Erlangen (RRZE)
> Martensstrasse 1, 91058 Erlangen, Germany
> Tel. +49 9131/85-29983, Fax +49 9131/302941
> frank.wein@fau.de
> www.rrze.fau.de
>=20
>=20


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