JAX-RS does not work with Spring Boot 1.4.1

Question

I am trying to develop a simple JAX-RS based web service using Spring Boot version 1.4.1.RELEASE. However getting this exception -

java.lang.IllegalStateExc         


        

Answer 1

Although Jersey cannot scan your classes inside the new version of the fat boot jar, you can achieve the same effect using Spring classpath scanning facilities. This way you can scan a package similarly to ResourceConfig.packages():

ClassPathScanningCandidateComponentProvider scanner = new ClassPathScanningCandidateComponentProvider(false);
scanner.addIncludeFilter(new AnnotationTypeFilter(Provider.class));
scanner.addIncludeFilter(new AnnotationTypeFilter(Path.class));
config.registerClasses(scanner.findCandidateComponents("your.package.to.scan").stream()
            .map(beanDefinition -> ClassUtils.resolveClassName(beanDefinition.getBeanClassName(), config.getClassLoader()))
            .collect(Collectors.toSet()));

Note: please have a look at the source of org.glassfish.jersey.server.internal.scanning.AnnotationAcceptingListener. This is the stock solution and you can see that it does the same: it scans for classes annotated with @Path or @Provider (but doesn't manage to find anything because of the broken scanning mechanism).

Update:

I had a custom config which didn't extend ResourceConfig but returned an instance of it as a bean. If you look at the official Spring example, you can insert the code above into the JerseyConfig() constructor (instead of the two register(...) calls). The only difference is that instead of calling config.registerClasses(...) you simply call registerClasses(...) in the constructor.