problem being RESTful with camel-restlet and fuse-esb-3.4.0.4

[korebantic]

I'm trying to expose a RESTful consumer "bc" by creating a camel su inside of fuse. I would think this should work, based on the example here: http://servicemix.apache.org/35-using-other-camel-components.html.

My camel SU RouterBuilder looks like:

...

from("restlet:http://localhost:8094/users?restletMethod=get")

  .to("jbi:endpoint:http://www.foo.com/integration/simpleBeanService/simpleBean");

...

I've added the camel-restlet dependency inside my pom:

...

org.apache.camel.ResolveEndpointFailedException: Failed to resolve endpoint: restlet:http://localhost:8094/users?restletMethod=get due to: org.apache.camel.RuntimeCamelException: Could not auto create component: restlet

        at org.apache.camel.impl.DefaultCamelContext.getEndpoint(DefaultCamelContext.java:358)

...

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.apache.camel.component.restlet.RestletComponent': Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class : Constructor threw exception; nested exception is java.lang.RuntimeException: Unable to fully initialize the Restlet. No Restlet engine available.

        at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:254)

        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:925)

        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:835)

        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:440)

        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)

        at java.security.AccessController.doPrivileged(Native Method)

        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)

        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:300)

        at org.apache.camel.spring.spi.SpringInjector.newInstance(SpringInjector.java:38)

        at org.apache.camel.impl.DefaultComponentResolver.resolveComponent(DefaultComponentResolver.java:73)

        at org.apache.camel.impl.DefaultCamelContext.getComponent(DefaultCamelContext.java:179)

</snip>

(full exception attached)

Any suggestions on how to fix this? Has anyone else tried using restlet with camel and fuse esb?

[njiang]

The exception shows you don't put the camel-restlet jar into the class path.

Basically, servicemix-camel component just includes camel-core, camel-spring modules, and here is a faq for how to use extra camel componets in servicemix-camel

[korebantic]

Thanks for the pointer -- I'll try it out and report back.

[korebantic]

The original exception outlined was caused by not including all the jars camel-restlet is dependent on. Maven doesn't automatically resolve all these dependencies for you. Poking around the Restlet site you can find this article about dealing with maven and Restlet:

http://www.restlet.org/downloads/maven

In addition, you don't necessarily need all the Restlet dependencies:

http://www.restlet.org/documentation/1.0/faq#04

Back to your point -- actually it seems like one can get away with keeping camel components inside a custom camel SU (sorta). However, this completely breaks hotdeploy and one would have to restart fuse after deployment (everytime). Given that this is far less than optimal, I did go ahead and recompile and redeploy the servicemix-camel component with my added dependencies per the link you provided. I have to admit the reasons behind having to do this escapes me.