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JBoss Fuse - Implementing WebService with Camel using CXF SOAP and Restful with CXFRS. Part Two

Continue from last post, this time I am going to add a restful web service endpoint to our insurance application, and show you use the CXF producer. :)


Similar to CXF web service, we need to create a resource file, but this time, instead of an interface, we need to create a java class. Within the resource class file, we have specify 2 things, the context path and the url path of each functions for the restful service. So in the java file below, you will see that I have declare "status" context path for our status service, "/custId/{id}" for getting the status and "/restcancel/{polno}" for canceling claim with restful API.


package org.blogdemo.claimdemo;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

@Path("/status")
public class StatusService {
	
	@GET
	@Path("/custId/{id}")
	@Produces(MediaType.APPLICATION_JSON)
	public ClaimStatus status(@PathParam("id") String custId){
		return null;
	}

	@GET
	@Path("/restcancel/{claimNo}")
	@Produces(MediaType.APPLICATION_JSON)
	public ClaimStatus restCancel(@PathParam("claimNo") String claimNo){
		return null;
	}
}


After creating the resource file, we need to register the restful endpoint in the camel context, it's very similar to the the SOAP one, by setting the address and service class which points to the resource file you create. That's it.

<cxf:rsServer id="statusEndpoint" address="http://localhost:9191/cxf/status" serviceClass="org.blogdemo.insurancedemo.StatusService" />

That's all we have to do to created the restful endpoint. Then adding a method in the processor for status check.

What about the rest cancel function?  Remember we already have a web service that does the cancel operation? Now what happens if we want to reuse it? it's a piece of cake, there are several ways of using the CXF producer,  we can specify to send data into different format, we could do, PAYLOAD, MESSAGE and POJO. You must know how much I love using POJO, so yes, I am going to use POJO for sending the message. The difference between these are simply just different format of data we are sending via this endpoint, with PAYLOAD, you will need to send a SOAP message.

For CXF producer with POJO data format, we need to prepare
1. header operation name
2. body content

The header operation name is the service you want to call and with POJO data format, you will need to put everything into a List. Within the processor, you will see me placing the content into a ArrayList.
	   public ClaimStatus status(String id) throws Exception {
	       // get the id of the input
	   	//ClaimInput input = exchange.getIn().getBody(ClaimInput.class);

	   	System.out.println(id);
	   	System.out.println("ClaimInput :["+ClaimInput.class.getPackage().getName()+"]");
	   	
	       // set reply including the id
	   	ClaimStatus status = new ClaimStatus();
	   	status.setCustomerID(id);
	   	status.setPolno("A123456789");
	   	status.setClaimNo("34567789");
	   	status.setStatus("OK");
	   
	   	return status;
	   }
	   
	   public List prepareList(String polno){
		   final List params = new ArrayList();
		   params.add(polno);
		   
		   return params;
	   }

This is what my camel route looks like. This time, I use content base routing to redirect to my desire processing bean and method.

    
        
        
        
            
                ${header.operationName} == "status"
                
            
            
                ${header.operationName} == "restCancel"
                
                    cancel
                
                
                
            
        
        
            
        
    

Lastly, I will deploy the application onto Fuse Fabric. Don't forget to setup your feature list.
You will see the application route running here.


And the registry can also be found here.

Video demo part Two.

Code Repo : https://github.com/weimeilin79/claim-cxf-cxfrs

Hope you enjoy me CXF insurance demo.

Comments

Ram Arshad said…
hai christina Lin, i have small doubt regarding the best approach or how to call a DownStream webservice from the actual service using spring.xml
it will be great help if you suggest on this thanks

Actually i have created stub or mock service (using spring.camel.xml) and i am trying to call this service in actual service implementation.i am not able to get the clear idea how to register the downstream(Stub) in the actual service.
Note:i am using xslt init because req coming from upstream is different to downstream request.
after doing all this i am seeing below error in my console

i would like to share the codes also to do that can you provide any mail.
Hi Christina,

Are there any caveats implementing Restlet directly on route (like on https://codevomit.wordpress.com/2015/01/04/setting-up-a-restlet-with-camel-in-jboss-fuse/) instead of Java classes for CXFRS? Do you have some guidance about best practices exposing production REST services with JBoss Fuse?

Thanks!

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