spring-remoting入门（http-invoker,hessian,burlap）

这里简单介绍一下sping remoting的三种实现，http-invoker，hessian，burlap，spring对hessian，burlap做好很好的封装，很容易使用，下面介绍一下他们的配置

一、服务器端配置（applicationContext.xml）：

<pre name="code" class="html"><?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:p="http://www.springframework.org/schema/p"xmlns:mvc="http://www.springframework.org/schema/mvc"xmlns:context="http://www.springframework.org/schema/context"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context.xsd"><context:component-scan base-package="com.plateno.service" /><bean id="beanNameUrlHandlerMapping" class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"/><!-- 类似rmi方式，采用java序列化，数据量较大 --><bean name="/httpInvokerService" class="org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter"><property name="service" ref="remoteService"/><property name="serviceInterface" value="com.plateno.platform.service.RemoteService"/></bean><!-- 采用hessian序列化，数据量最小 --><bean name="/hessianService" class="org.springframework.remoting.caucho.HessianServiceExporter"><property name="service" ref="remoteService"/><property name="serviceInterface" value="com.plateno.platform.service.RemoteService"/></bean> <!-- xml传输数据，数据量比httpinvoker方式小 --><bean name="/burlapService" class="org.springframework.remoting.caucho.BurlapServiceExporter"><property name="service" ref="remoteService"/><property name="serviceInterface" value="com.plateno.platform.service.RemoteService"/></bean>  <mvc:interceptors><mvc:interceptor><mvc:mapping path="/**"/><bean class="com.plateno.interceptor.CommonInterceptor"/></mvc:interceptor></mvc:interceptors></beans>

二、服务器端配置（web.xml）

<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns="http://java.sun.com/xml/ns/javaee"xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"id="WebApp_ID" version="2.5"><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:applicationContext.xml</param-value></context-param><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><servlet><servlet-name>springmvc</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring-mvc.xml</param-value></init-param></servlet><servlet-mapping><servlet-name>springmvc</servlet-name><url-pattern>/</url-pattern></servlet-mapping></web-app>

三、写一个service，再写一个serviceImpl就ok了。

四、客户端配置：

<pre name="code" class="html"><bean id="httpInvokerProxyFactoryBean" class="org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean"><property name="serviceUrl" value="http://localhost:9999/server/httpInvokerService"/><property name="serviceInterface" value="com.plateno.platform.service.RemoteService"/></bean> <bean id="hessianProxyFactoryBean" class="org.springframework.remoting.caucho.HessianProxyFactoryBean"><property name="serviceUrl" value="http://localhost:9999/server/hessianService"/><property name="serviceInterface" value="com.plateno.platform.service.RemoteService"/></bean><bean id="burlapProxyFactoryBean" class="org.springframework.remoting.caucho.BurlapProxyFactoryBean"><property name="serviceUrl" value="http://localhost:9999/server/burlapService"/><property name="serviceInterface" value="com.plateno.platform.service.RemoteService"/></bean>

五、测试类：

@Autowiredprivate RemoteService remoteService;@RequestMapping(value="/test")public ModelAndView test(@RequestParam(value="name", required=false) String name) {UserDTO dto = remoteService.getUser("hello");System.out.println(dto);Map<String, Object> model = new HashMap<String, Object>();return new ModelAndView("test/hello", model);}

加载@@@@@@@@

如果按照上面的方式，每发布一个接口，就得往xml文件写配置，很麻烦，下面来介绍工程自动发布接口，程序员像在一个工程写代码一个，写接口，写实现，客户端调用就ok了

1、给定包名，扫描包名下面的类（接口）参照spring实现：

package com.plateno.util;import java.util.ArrayList;import java.util.List;import org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider;import org.springframework.core.io.Resource;import org.springframework.core.io.support.PathMatchingResourcePatternResolver;import org.springframework.core.io.support.ResourcePatternResolver;import org.springframework.core.type.ClassMetadata;import org.springframework.core.type.classreading.CachingMetadataReaderFactory;import org.springframework.core.type.classreading.MetadataReader;import org.springframework.core.type.classreading.MetadataReaderFactory;public class ClassPathScanning extends ClassPathScanningCandidateComponentProvider {private List<String> classNameSet = new ArrayList<String>(20);private List<Class<?>> clzSet = new ArrayList<Class<?>>(20);public ClassPathScanning(boolean useDefaultFilters) {super(useDefaultFilters);}static final String DEFAULT_RESOURCE_PATTERN = "**/*.class";private String resourcePattern = DEFAULT_RESOURCE_PATTERN;private ResourcePatternResolver resourcePatternResolver = new PathMatchingResourcePatternResolver();private MetadataReaderFactory metadataReaderFactory = new CachingMetadataReaderFactory(this.resourcePatternResolver);public void getClassFromPackage(String basePackage) {try {String packageSearchPath = ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX +resolveBasePackage(basePackage) + "/" + this.resourcePattern;Resource[] resources = this.resourcePatternResolver.getResources(packageSearchPath);for(Resource r : resources) {if(r.isReadable()) {MetadataReader metadataReader = this.metadataReaderFactory.getMetadataReader(r);ClassMetadata classMetadata = metadataReader.getClassMetadata();if(!classMetadata.isIndependent()) {continue;}String className = classMetadata.getClassName();int index = className.lastIndexOf(".");if(index > 0) {String name = className.substring(index+1);name = name.substring(0, 1).toLowerCase() + name.substring(1);classNameSet.add(name);clzSet.add(Class.forName(className));}}}} catch(Exception e) {e.printStackTrace();}}public List<String> getClassNameSet() {return classNameSet;}public List<Class<?>> getClzSet() {return clzSet;}}

2、服务端发布接口：

package com.plateno.util;import java.util.List;import org.springframework.beans.BeansException;import org.springframework.beans.factory.BeanNameAware;import org.springframework.beans.factory.InitializingBean;import org.springframework.beans.factory.config.BeanFactoryPostProcessor;import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;import org.springframework.context.ApplicationContext;import org.springframework.context.ApplicationContextAware;import org.springframework.remoting.caucho.BurlapServiceExporter;import org.springframework.remoting.caucho.HessianServiceExporter;import org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter;public class BeanFactoryProxyServer implements BeanFactoryPostProcessor,ApplicationContextAware {private ApplicationContext applicationContext;private ConfigurableListableBeanFactory beanFactory;private String basePackage = "com.plateno.platform.service";@Overridepublic void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {this.beanFactory = beanFactory;//httpInvoker();//hessian();burlap();}private void httpInvoker() {ClassPathScanning scann = new ClassPathScanning(true);scann.getClassFromPackage(basePackage);List<String> classNameSet = scann.getClassNameSet();List<Class<?>> clzSet = scann.getClzSet();for(int i=0; i<classNameSet.size(); i++) {Class<?> clz = clzSet.get(i);String className = classNameSet.get(i);HttpInvokerServiceExporter exporter = new HttpInvokerServiceExporter();exporter.setService(this.applicationContext.getBean(className));exporter.setServiceInterface(clz);exporter.afterPropertiesSet();beanFactory.registerSingleton("/" + className, exporter);}}private void hessian() {ClassPathScanning scann = new ClassPathScanning(true);scann.getClassFromPackage(basePackage);List<String> classNameSet = scann.getClassNameSet();List<Class<?>> clzSet = scann.getClzSet();for(int i=0; i<classNameSet.size(); i++) {Class<?> clz = clzSet.get(i);String className = classNameSet.get(i);HessianServiceExporter exporter = new HessianServiceExporter();exporter.setService(this.applicationContext.getBean(className));exporter.setServiceInterface(clz);exporter.afterPropertiesSet();beanFactory.registerSingleton("/" + className, exporter);}}private void burlap() {ClassPathScanning scann = new ClassPathScanning(true);scann.getClassFromPackage(basePackage);List<String> classNameSet = scann.getClassNameSet();List<Class<?>> clzSet = scann.getClzSet();for(int i=0; i<classNameSet.size(); i++) {Class<?> clz = clzSet.get(i);String className = classNameSet.get(i);BurlapServiceExporter exporter = new BurlapServiceExporter();exporter.setService(this.applicationContext.getBean(className));exporter.setServiceInterface(clz);exporter.afterPropertiesSet();beanFactory.registerSingleton("/" + className, exporter);}}@Overridepublic void setApplicationContext(ApplicationContext applicationContext)throws BeansException {this.applicationContext = applicationContext;}}

3、客户端配置：

package com.plateno.util;import java.util.List;import org.springframework.beans.BeansException;import org.springframework.beans.factory.config.BeanFactoryPostProcessor;import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;import org.springframework.remoting.caucho.BurlapProxyFactoryBean;import org.springframework.remoting.caucho.HessianProxyFactoryBean;import org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean;public class BeanFactoryProxyClient implements BeanFactoryPostProcessor {private ConfigurableListableBeanFactory beanFactory;private String basePackage = "com.plateno.platform.service";private String baseUrl = "http://localhost:9999/server/";@Overridepublic void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {this.beanFactory = beanFactory;//httpInvoker();//hessian();burlap();}private void httpInvoker() {ClassPathScanning scann = new ClassPathScanning(true);scann.getClassFromPackage(basePackage);List<String> classNameSet = scann.getClassNameSet();List<Class<?>> clzSet = scann.getClzSet();for(int i=0; i<classNameSet.size(); i++) {Class<?> clz = clzSet.get(i);String className = classNameSet.get(i);HttpInvokerProxyFactoryBean factoryBean = new HttpInvokerProxyFactoryBean();factoryBean.setServiceInterface(clz);factoryBean.setServiceUrl(baseUrl + className);factoryBean.afterPropertiesSet();beanFactory.registerSingleton(className, factoryBean.getObject());}}private void hessian() {ClassPathScanning scann = new ClassPathScanning(true);scann.getClassFromPackage(basePackage);List<String> classNameSet = scann.getClassNameSet();List<Class<?>> clzSet = scann.getClzSet();for(int i=0; i<classNameSet.size(); i++) {Class<?> clz = clzSet.get(i);String className = classNameSet.get(i);HessianProxyFactoryBean factoryBean = new HessianProxyFactoryBean();factoryBean.setServiceInterface(clz);factoryBean.setServiceUrl(baseUrl + className);factoryBean.afterPropertiesSet();beanFactory.registerSingleton(className, factoryBean.getObject());}}private void burlap() {ClassPathScanning scann = new ClassPathScanning(true);scann.getClassFromPackage(basePackage);List<String> classNameSet = scann.getClassNameSet();List<Class<?>> clzSet = scann.getClzSet();for(int i=0; i<classNameSet.size(); i++) {Class<?> clz = clzSet.get(i);String className = classNameSet.get(i);BurlapProxyFactoryBean factoryBean = new BurlapProxyFactoryBean();factoryBean.setServiceInterface(clz);factoryBean.setServiceUrl(baseUrl + className);factoryBean.afterPropertiesSet();beanFactory.registerSingleton(className, factoryBean.getObject());}}}

4、把服务端跟客户端配置在spring配置文件，然后程序就能用了，简化了很多。