How can I invoke a RESTful service through Apache Camel?
Solution 1
You could easily use the CXFRS Component; if you need to do it using the HTTP Component for some reason you could easily use that as well:
<setHeader headerName="CamelHttpUri">
<simple>http://localhost:8080/rest/api/2/project/${header.myKey}/components</simple>
</setHeader>
<inOut uri="http://doesnt.matter.we/override/it/anyways" />
And of course you will need to enrich your message with the myKey
header before getting to this part of the route.
Solution 2
See also this FAQ about using dynamic to endpoints in Camel http://camel.apache.org/how-do-i-use-dynamic-uri-in-to.html
Essentially the EIP pattern for this is the recipient list.
So in your case it could also be simplified to as one EIP
<recipientList>
<simple>http://localhost:8080/rest/api/2/project/${header.myKey}/components</simple>
</recipientList>
Mind the http component in Camel is fully synchronous. If you want to do request/reply over HTTP and avoid having the caller block while waiting for the reply message, then you can use some of the other HTTP components from Camel such as:
- camel-ahc
- camel-http4
- camel-jetty
Solution 3
I am using apache camel jetty
CamelContext context = new DefaultCamelContext();
public void configure(){
context.addRoutes(new RouteBuilder(){
from("jetty:localhost:9000/offers")
.to("direct:getOffers")
.end();
}
});
so here when the user will hit http://localhost:9000/offers then the endpoint direct:getOffers will get invoked
so now defining the getOffers end point
context.addRoutes(new RouteBuilder(){
public void configure(){
from("direct:getOffers")
.to("jetty:http://localhost:9008/api/v2.0/offers?
bridgeEndpoint=true")
.end();
}
});
Here another service is running at 9008 having a rest resource of http://localhost:9008/api/v2.0/offers and this is the resource that i am trying to consume.
so when camel instance starts it registers both the routes then it does the processing as described above
Note Its important to add the option of ?bridgeEndpoint=true for this to work
jasmeet24
Updated on August 26, 2020Comments
-
jasmeet24 over 3 years
I am currently using a HTTP method for invoking some URL which will create a JIRA issue.
Now I want to use Apache Camel, how can I use that?
I need to invoke the following link through Camel:
http://localhost:8080/rest/api/2/project/" + key + /components
As I'm new to Camel, please suggest some solutions and examples too.
Thanks