通过 Spring 和 CXF 同时为一个端点公开 Rest 和 Soap

Question

我有一个非常简单的服务，它必须以两种方式公开：REST 和 SOAP 我写了以下代码：

@WebService(name = "Base")
@Path("/Base")
@Produces("application/json")
public class BaseService
{
    @POST
    @Path("/Hello")
    public String sayHello()
    {
        return  "Hello";
    }
}

那是我的端点，我将其配置如下：

import org.apache.cxf.bus.spring.SpringBus;
import org.apache.cxf.endpoint.Server;
import org.apache.cxf.jaxrs.JAXRSServerFactoryBean;
import org.apache.cxf.jaxws.JaxWsServerFactoryBean;
import org.codehaus.jackson.jaxrs.JacksonJsonProvider;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.DependsOn;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.util.ArrayList;

@Configuration
public class CxfConfiguration {
    @Bean( destroyMethod = "shutdown" )
    public SpringBus cxf() {
        return new SpringBus();
    }

    @Bean @DependsOn( "cxf" )
    public Server getServer() 
    {
        JaxWsServerFactoryBean wsFactory = new JaxWsServerFactoryBean();
        wsFactory.setServiceBean(getBaseService());
        return wsFactory.create();
    }

    @Bean(name = "RestWS") @DependsOn( "cxf" )
    public Server getServerRest()
    {
        JAXRSServerFactoryBean restFactory = new JAXRSServerFactoryBean();
        ArrayList<Object> objectArrayList = new ArrayList<>();
        restFactory.setServiceBean(getBaseService());
        restFactory.setProvider(new JacksonJsonProvider());

        return restFactory.create();
    }

    ApplicationContext applicationContext = new ClassPathXmlApplicationContext("facade.xml");

    @Bean
    public BaseService getBaseService()
    {
        return (BaseService)applicationContext.getBean("base_service");
    }
}

最后facade.xml 是：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <bean id="base_service" class="BaseService"/>

</beans>

当我运行我的应用程序时，我得到NullPointerException：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'RestWS' defined in CxfConfiguration: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.cxf.endpoint.Server]: Factory method 'getServerRest' threw exception; nested exception is org.apache.cxf.service.factory.ServiceConstructionException
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:583)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1249)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1098)

底线是我希望同时拥有这两种服务形式，但我遇到了上述异常。当我评论getServer 或getServerRest 方法之一时，一切都会好起来的。

Answer 1

当您想在 SOAP 和 REST 标准中表示服务时，您必须为 REST 定义一个服务器并为SOAP。 对于您的问题，您必须通过以下代码更改 CxfConfiguration 类：

import org.apache.cxf.bus.spring.SpringBus;
import org.apache.cxf.endpoint.Server;
import org.apache.cxf.jaxrs.JAXRSServerFactoryBean;
import org.apache.cxf.jaxws.JaxWsServerFactoryBean;
import org.codehaus.jackson.jaxrs.JacksonJsonProvider;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.DependsOn;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.util.ArrayList;

@Configuration
public class CxfConfiguration 
{
    @Autowired
    private ApplicationContext applicationContext;

    @Bean( destroyMethod = "shutdown" )
    public SpringBus cxf() {
        return new SpringBus();
    }

    @Bean(name = "RestWS") 
    public Server getServerRest()
    {
        JAXRSServerFactoryBean restFactory = new JAXRSServerFactoryBean();
        ArrayList<Object> objectArrayList = new ArrayList<>();
        restFactory.setServiceBean(getBaseService());
        restFactory.setProvider(new JacksonJsonProvider());

        return restFactory.create();
    }
   @Bean 
    public Server getServer() 
    {
        Bus bus = (Bus) applicationContext.getBean(Bus.DEFAULT_BUS_ID);
        Object implementor = getBaseService();
        EndpointImpl endpoint = new EndpointImpl(bus, implementor);
        endpoint.publish("/Base");
        return endpoint ;
    }

    ApplicationContext applicationContext = new ClassPathXmlApplicationContext("facade.xml");

    @Bean
    public BaseService getBaseService()
    {
        return (BaseService)applicationContext.getBean("base_service");
    }
}

这可以解决您的问题，但我认为最好为每个 REST 和 SOAP 服务设置不同的路径或地址。