how to return customized response on exception in apache camel

Question

I am using Apache camel and jboss fuse, I have created a sample route blue print listed below in

<?xml version="1.0" encoding="UTF-8"?>
<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0"
    xmlns:camel="http://camel.apache.org/schema/blueprint"
    xmlns:cxf="http://camel.apache.org/schema/blueprint/cxf"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://www.osgi.org/xmlns/blueprint/v1.0.0 http://www.osgi.org/xmlns/blueprint/v1.0.0/blueprint.xsd        http://camel.apache.org/schema/blueprint http://camel.apache.org/schema/blueprint/camel-blueprint.xsd">
    <cxf:rsServer address="/testservice" id="testserver" serviceClass="com.company.HelloBean">
    <camelContext id="testContext" trace="false" xmlns="http://camel.apache.org/schema/blueprint">
        <route id="testRoute" >
            <from id="_from1" uri="cxfrs:bean:testserver"/>
                <bean beanType="com.company.HelloBean"
                    id="_bean1" method="hello"/>
        </route>
    </camelContext>
</blueprint>

and java class that implements it

@Path("/testservicenew")
public class HelloBean {


    @POST
    @Path("/test")
    @Produces(MediaType.APPLICATION_JSON)
    @Consumes(MediaType.APPLICATION_JSON)
    public String hello(Person name ) {

        return "Hello:"+name.getName();
    }       
}

but when I send wrong JSON it returns bad request, I some custom interceptor so I can control the the returned response with my customized body and header

Answer 1

you can define as Custom Exception Handler as

@Provider
public class ExceptionHandler implements ExceptionMapper<Throwable> {
    @Override
    public Response toResponse(Throwable exception) {

        System.out.println("Exception type:" + exception.getClass().getCanonicalName());

        exception.printStackTrace();
         if (exception instanceof BadRequestException) {

            return Response.status(Response.Status.BAD_REQUEST)
                    .header("unexpected request data", "BadRequestExceptiont").build();

        } 


        return Response.status(Response.Status.REQUEST_TIMEOUT).header("Problemo", "yes problemo").build();
    }

}  

and you can define it in your route to use this class

<?xml version="1.0" encoding="UTF-8"?>
    <blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0"
        xmlns:camel="http://camel.apache.org/schema/blueprint"
        xmlns:cxf="http://camel.apache.org/schema/blueprint/cxf"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.osgi.org/xmlns/blueprint/v1.0.0 http://www.osgi.org/xmlns/blueprint/v1.0.0/blueprint.xsd        http://camel.apache.org/schema/blueprint http://camel.apache.org/schema/blueprint/camel-blueprint.xsd">
        <cxf:rsServer address="/testservice" id="testserver" serviceClass="com.company.HelloBean">
  <cxf:providers>
            <bean class="com.company.ExceptionHandler" id="securityException"/>
        </cxf:providers>
    </cxf:rsServer>
        <camelContext id="testContext" trace="false" xmlns="http://camel.apache.org/schema/blueprint">
            <route id="testRoute" >
                <from id="_from1" uri="cxfrs:bean:testserver"/>
                    <bean beanType="com.company.HelloBean"
                        id="_bean1" method="hello"/>
            </route>
        </camelContext>
    </blueprint>