Spring与Hessian的集成

基础介绍

　　在上一篇中我们通过HessianServlet的方式暴露一个简单的Hessian服务，这种方式会造成服务层和控制层之间耦合。一般情况下我们都不会采取这种方式【本次只是为了演示基础的Hessian服务实现】。Spring框架也集成了对一些基础RPC框架的支持，比如jaxws-WebService、Hessian、Http invoker等。
　　
本篇文章就简单介绍下，Spring与Hessian集成的方法。

Spring-Hessian Demo

依赖

　　pom.xml

<dependency>
	<groupId>com.caucho</groupId>
	<artifactId>hessian</artifactId>
	<version>4.0.38</version>
</dependency>
<dependency>
	<groupId>javax.servlet</groupId>
	<artifactId>servlet-api</artifactId>
	<version>2.5</version>
</dependency>
<dependency>
	<groupId>org.springframework</groupId>
	<artifactId>spring-web</artifactId>
	<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
	<groupId>org.springframework</groupId>
	<artifactId>spring-webmvc</artifactId>
	<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
	<groupId>org.apache.logging.log4j</groupId>
	<artifactId>log4j-api</artifactId>
	<version>2.0.2</version>
</dependency>
<dependency>
	<groupId>org.apache.logging.log4j</groupId>
	<artifactId>log4j-core</artifactId>
	<version>2.0.2</version>
</dependency>
<dependency>
	<groupId>com.lmax</groupId>
	<artifactId>disruptor</artifactId>
	<version>3.2.1</version>
</dependency>

接口声明以及实现

　　
　　HelloWordService.java

　　public interface HelloWordService {

　　　　public String sayMsg(String message);
	
　　}

　　HelloWordServiceImpl.java

public class HelloWordServiceImpl implements HelloWordService{

	public String sayMsg(String message) {
		// TODO Auto-generated method stub
		return "Hello  " + message;
	}

}

测试Code

　　HellowordController.java

@Controller
public class HellowordController {
	
	private static Logger logger = LogManager.getLogger(HellowordController.class.getName());

	@Resource(name="hellowordServiceImpl")
	private HelloWordService service;
	
	@RequestMapping(value="/sayMsg",method=RequestMethod.GET)
	@ResponseBody
	public String sayMsg(String msg){
		logger.info("parameter msg ----::::"+msg);
		return service.sayMsg(msg);
	}
}

　　Test.java

public static void main(String[] args) throws Exception{

	String url = "http://localhost:8080/hessian-server-springmvc/hessian/hellowordService";

	HessianProxyFactory factory = new HessianProxyFactory();
	HelloWordService service = (HelloWordService) factory.create(HelloWordService.class, url);

	System.out.println(service.sayMsg(" word!!!!"));

}

配置文件

　　webContext.xml

<context:annotation-config />
<mvc:annotation-driven />

   <context:component-scan base-package="org.luis.framework.hessian"/>  
   <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/>
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />
<!-- 2.jsp视图解析器，内部资源视图解析器;前缀+逻辑名+后缀 -->
<bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
	<property name="prefix" value=""/>
	<property name="suffix" value=""/>
</bean>
   
   <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">  
    <property name="locations"> <!-- PropertyPlaceholderConfigurer类中有个locations属性，接收的是一个数组，即我们可以在下面配好多个properties文件 -->  
        <array>  
            <value>classpath:application.properties</value>  
        </array>  
    </property>  
</bean>  
   <bean name="hellowordServiceImpl" class="org.springframework.remoting.caucho.HessianProxyFactoryBean">
   	<property name="serviceInterface" value="org.luis.framework.hessian.service.HelloWordService"/>
   	<property name="serviceUrl" value="${hessian.server.url}/hellowordService"/>
   </bean>

　　hessian-servlet.xml

<bean name="hellowordService" class="org.luis.framework.hessian.service.impl.HelloWordServiceImpl"/>

<!-- 测试服务 -->  
<bean name="/hellowordService" class="org.springframework.remoting.caucho.HessianServiceExporter">  
    <property name="service" ref="hellowordService"/>  
    <property name="serviceInterface" value="org.luis.framework.hessian.service.HelloWordService"/>  
</bean>

　　application.properties

hessian.server.url=http://localhost:8080/hessian-server-springmvc/hessian

　　web.xml

<context-param>
	<param-name>contextConfigLocation</param-name>
	<param-value></param-value>
</context-param>
<listener>
	<listener-class>org.springframework.web.context.ContextLoaderListener
	</listener-class>
</listener>

<servlet>
	<servlet-name>hessianService</servlet-name>
	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
	<init-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:hessian-servlet.xml</param-value>
	</init-param>
	<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
	<servlet-name>hessianService</servlet-name>
	<url-pattern>/hessian/*</url-pattern>
</servlet-mapping>
<!-- Spring MVC -->
<servlet>
	<servlet-name>spring</servlet-name>
	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
	<init-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>
			classpath:webContext.xml
		</param-value>
	</init-param>
	<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
	<servlet-name>spring</servlet-name>
	<url-pattern>/*</url-pattern>
</servlet-mapping>

验证

　　将应用通过war的方式发布至Tomcat容器，容器正常启动。
　　浏览器中输入：http://localhost:8080/hessian-server-springmvc/hessian/hellowordService

　　输出：“HTTP Status 405 - HessianServiceExporter only supports POST requests”，即表示Hessian服务发布成功
　　
　　两种验证方式：
　　　　1.通过HTTP的方式，自已调用自已的Hessian服务
　　　　2.通过Main方法直接验证

　　第一种方式
　　　　浏览器输入：http://localhost:8080/hessian-server-springmvc/sayMsg?msg=xxx
　　　　输出”Hello xxx“表示服务自已调用自已正常、

　　第二种方式：
　　　　直接运行Main方法即可。