小编典典

为什么@EnableWs从Spring bean中删除了aop代理

spring-boot

我试图在我的Spring Boot Web服务项目中添加自定义拦截器。我遵循以下示例并创建了此配置:

package org.example;

import java.util.List;

import org.aspect.PersistentAspect;
import org.springframework.aop.support.AopUtils;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.ClassPathResource;
import org.springframework.oxm.jaxb.Jaxb2Marshaller;
import org.springframework.ws.config.annotation.EnableWs;
import org.springframework.ws.config.annotation.WsConfigurerAdapter;
import org.springframework.ws.server.EndpointInterceptor;
import org.springframework.ws.transport.http.MessageDispatcherServlet;
import org.springframework.xml.xsd.SimpleXsdSchema;
import org.springframework.xml.xsd.XsdSchema;

@EnableWs
@Configuration
public class WsConfig extends WsConfigurerAdapter {

    @Bean
    public ServletRegistrationBean messageDispatcherServlet(ApplicationContext applicationContext) {
        final MessageDispatcherServlet servlet = new MessageDispatcherServlet();
        servlet.setApplicationContext(applicationContext);
        servlet.setTransformWsdlLocations(true);
        return new ServletRegistrationBean(servlet, "/v1/*");
    }

    @Bean
    public XsdSchema schema() {
        return new SimpleXsdSchema(new ClassPathResource("country.xsd"));
    }

    @Bean
    public Jaxb2Marshaller marshaller() {
        Jaxb2Marshaller marshaller = new Jaxb2Marshaller();
        String[] jaxbContext = new String[] { "io.spring.guides.gs_producing_web_service" };
        marshaller.setContextPaths(jaxbContext);
        return marshaller;
    }

    @Override
    public void addInterceptors(List<EndpointInterceptor> interceptors) {
        // aop not working
        interceptors.add(new CustomValidatingInterceptor(schema(), config()));
        // aop working
        // interceptors.add(new CustomValidatingInterceptor(schema(), null));
    }

    @Bean
    public AppConfig config() {
        return new AppConfig();
    }

    @Bean
    public PersistentAspect persistentAspect() {
        PersistentAspect persistentAspect = new PersistentAspect();
        return persistentAspect;
    }

    @Bean
    public Object testAop() {
        System.out.println("is config aop proxy: " + AopUtils.isAopProxy(config()));

        return null;
    }
}

但是,当我在addInterceptors方法中添加新的拦截器时,我在配置类中删除了aop代理时遇到了问题。知道为什么吗?整个项目都在git上


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2020-05-30

共1个答案

小编典典

问题是Spring中的初始化顺序。从技术上讲,因为BeanPostProcessorWS端点(AnnotationActionEndpointMapping在spring-
ws中)有一个,它将强制对此需要的任何依赖项(尤其是任何EndpointInterceptorbean )进行早期初始化。

解决此问题的一种方法是重新排列BeanPostProcessor,甚至创建您自己的BeanPostProcessor,但通常更容易保留Spring的默认配置-
避免在初始化序列中的其他地方出现类似的意外情况。

避免问题的更简单方法可能是ObjectFactoryEndpointInterceptorbean中使用an
。这将延迟实例化AppConfigbean直到引用它,届时Aop编织也将发生。

@Component
public class CustomValidatingInterceptor extends PayloadValidatingInterceptor {

    @Autowired
    private ObjectFactory<AppConfig> konfigurace;

    @Override
    public boolean handleRequest(MessageContext messageContext, Object endpoint)
            throws IOException, SAXException, TransformerException {
        System.out.println("is config aop proxy in interceptor: " +
                AopUtils.isAopProxy(konfigurace.getObject()));
        return super.handleRequest(messageContext, endpoint);
    }

显然,这意味着CustomValidatingInterceptor必须将其WsConfig作为已注入(自动装配)的Bean 进行引用。

感谢您的例子-有一个叉这里使用的ObjectFactory技术。当我从SoapUI发送请求时,这config在所有WsConfig.testAop(),中CountryEndpoint和中都将bean
显示为Aop代理CustomValidatingInterceptor

2020-05-30