将spring-boot与RESTEasy集成

Question

我正在尝试原型Spring Boot应用程序.我来自Guice JAX-RS应用程序,因此我更喜欢Spring MVC的标准JAX-RS注释.我已经让Jetty起来服务了:

@Configuration
@Import({ResteasyBootstrap.class, SpringBeanProcessorServletAware.class, HttpServletDispatcher.class})
public class EmbeddedJetty {
    @Bean
    @Singleton
    public EmbeddedServletContainerFactory servletContainer() {
        JettyEmbeddedServletContainerFactory factory = new JettyEmbeddedServletContainerFactory();
        factory.setPort(9000);
        factory.setSessionTimeout(10, TimeUnit.MINUTES);
        return factory;
    }
}

但是,我只是无法弄清楚如何正确连接RESTEasy.有了上面的SpringBeanProcessorServletAware保释,似乎在它最终被使用之前ServletContext没有注入ServletContextAware:

java.lang.NullPointerException: null
    at org.jboss.resteasy.plugins.spring.SpringBeanProcessorServletAware.getRegistry(SpringBeanProcessorServletAware.java:30)
    at org.jboss.resteasy.plugins.spring.SpringBeanProcessor.postProcessBeanFactory(SpringBeanProcessor.java:247)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:284)
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:174)
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:680)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:522)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:766)

我也试过使用SpringContextLoaderListener,但这似乎与spring-boot AnnotationConfigEmbeddedWebApplicationContext类冲突.

我使用的是spring-boot 1.3.3和spring-framework 4.3.0.rc1

Answer 1

另一个答案是没有你的资源作为spring bean,这个自动配置将正确地集成它们:

Configuration类:

@Configuration
@ConditionalOnWebApplication
public class RestEasyAutoConfigurer {


    private Environment environment;   

    @Bean(name = "resteasyDispatcher")
    public ServletRegistrationBean resteasyServletRegistration() {
        ServletRegistrationBean registrationBean = new ServletRegistrationBean(new HttpServletDispatcher(), getPrefix()
                + "/*");
        registrationBean.setInitParameters(ImmutableMap.of("resteasy.servlet.mapping.prefix", "/rs/")); // set prefix here
        registrationBean.setLoadOnStartup(1);
        return registrationBean;
    }

    @Bean(destroyMethod = "cleanup")
    public static RestEasySpringInitializer restEasySpringInitializer() {
        return new RestEasySpringInitializer();
    }    

    @Bean
    // use Spring Boot configured Jackson
    public CustomResteasyJackson2Provider jackson2Provider(ObjectMapper mapper) {
        return new CustomResteasyJackson2Provider(mapper); 
    }

    public static class RestEasySpringInitializer
            implements
                ServletContextInitializer,
                ApplicationContextAware,
                BeanFactoryPostProcessor {

        private ResteasyDeployment deployment;

        private ConfigurableApplicationContext applicationContext;

        private ConfigurableListableBeanFactory beanFactory;

        public void cleanup() {
            deployment.stop();
        }

        @Override
        public void onStartup(ServletContext servletContext) throws ServletException {
            ListenerBootstrap config = new ListenerBootstrap(servletContext);
            deployment = config.createDeployment();
            deployment.start();

            servletContext.setAttribute(ResteasyProviderFactory.class.getName(), deployment.getProviderFactory());
            servletContext.setAttribute(Dispatcher.class.getName(), deployment.getDispatcher());
            servletContext.setAttribute(Registry.class.getName(), deployment.getRegistry());

            SpringBeanProcessor processor = new SpringBeanProcessor(deployment.getDispatcher(),
                    deployment.getRegistry(), deployment.getProviderFactory());
            processor.postProcessBeanFactory(beanFactory);
            applicationContext.addApplicationListener(processor);
        }

        @Override
        public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
            this.beanFactory = beanFactory;
        }

        @Override
        public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
            this.applicationContext = (ConfigurableApplicationContext) applicationContext;
        }
    }
}

杰克逊提供者:

@Provider
@Consumes({"application/*+json", "text/json"})
@Produces({"application/*+json", "text/json"})
public class CustomResteasyJackson2Provider extends ResteasyJackson2Provider {
    private ObjectMapper mapper;

    public CustomResteasyJackson2Provider(ObjectMapper mapper) {
        this.mapper = mapper;
    }

    @Override
    public ObjectMapper locateMapper(Class<?> type, MediaType mediaType) {
        return Optional.ofNullable(_mapperConfig.getConfiguredMapper()).orElse(mapper);
    }    
}

注意:这是Spring Boot 1.3.3/RESTEasy 3.0.16的工作配置