jersey-spring3 Bridge找不到我的资源

Question

I'm using the Jersey / Spring bridge ( https://jersey.java.net/documentation/latest/spring.html ) and I can't get it to see my Jersey resources via a Spring XML config file.

(Spring 3.2, Jersey 2.5, jersey-spring3 2.5, jackson-jaxrs-json-provider 2.2.3.)

In my Spring config file I have

<context:component-scan base-package="com.fasterxml.jackson.jaxrs.json, com.mycompany.mappers, com.mycompany.resources" />

SpringComponentProvider.initialize() succeeds, and SpringComponentProvider.bind gets called for a bunch of classes (well, actually just the stuff in the Jersey server's WADL package), but is not called for my resource classes.

I can see that Spring is finding my resource:

2013-12-30 16:47:24,246 [main]  org.springframework.beans.factory.support.DefaultSingletonBeanRegistry:215  DEBUG   Creating shared instance of singleton bean 'myResource'
2013-12-30 16:47:24,246 [main]  org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory:432    DEBUG   Creating instance of bean 'myResource'

The sample app referenced in the docs ( https://github.com/jersey/jersey/tree/2.5/examples/helloworld-spring-webapp ) defines a Jersey application subclass of org.glassfish.jersey.server.ResourceConfig and programmatically registers resources. I was hoping to use a Spring XML config file to bind resources, rather than hardcoding them. (This used to work in Jersey 1.x.)

How can I get Jersey 2 to recognize my resources?

Answer 1

I'll answer my own question.

The answer is that the Spring bridge for Jersey 2 doesn't support <context:component-scan .../> and you have to register your resources programmatically.

Have a look at the Jersey/Spring docs ( https://jersey.java.net/documentation/latest/spring.html ) and follow the Spring sample app exactly ( https://github.com/jersey/jersey/tree/master/examples/helloworld-spring-webapp )... if you step off that path then it won't work.

The key part is to subclass ResourceConfig (eg https://github.com/jersey/jersey/blob/master/examples/helloworld-spring-webapp/src/main/java/org/glassfish/jersey/examples/helloworld/spring/MyApplication.java ) like this:

public class MyApplication extends ResourceConfig {

    public MyApplication () {
        register(MyRequestContextFilter.class);
        register(MyResource.class);
        packages("com.mycompany.resources");
        ...
    }
}

You then name your subclass in your app descriptor using javax.ws.rs.Application (eg https://github.com/jersey/jersey/blob/master/examples/helloworld-spring-webapp/src/main/webapp/WEB-INF/web.xml ):

<servlet>
    <servlet-name>SpringApplication</servlet-name>
    <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
    <init-param>
        <param-name>javax.ws.rs.Application</param-name>
        <param-value>org.glassfish.jersey.examples.helloworld.spring.MyApplication</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>