hessian
hessian：
一个轻量级的RPC框架，基于http协议，使用二进制序列化，对于大数据包比较友好。它的参数和返回值都需要实现Serializable接口。环境说明：
- spring version 3.0 RELEASE.
- Hessian version 4.0.7 WHATEVER.
- JEE version 2.5
实现步骤:
一、服务端
1、配置 web.xml ,添加对spring-web中 DispatcherServlet的定义.具体如下:
<servlet>
<servlet-name>test-remote</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/config/test-remote.xml</param-value>
</init-param>
<load-on-startup>4</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>test-remote</servlet-name>
<url-pattern>/remote/*</url-pattern>
</servlet-mapping>
DispatcherServlet是可以配置多个的,我这里还有一个test-local,mapping着 "/" 路径,他们之间并不会影响。当然可以单纯的配置多个 servlet-mapping
2、传输对象类Space 的定义:
package test.remote.dto;
import java.io.Serializable;
import java.util.Date;
/**
* Space data transfer object.
* @author gogo
*
*/
public class Space implements Serializable{
/**
* auto generated serialVersionUid.
*/
private static final long serialVersionUID = 5632812127919571530L;
/** public space name for people in the space.*/
private String publicName;
private String privateName;
private boolean isActive;
private Date lastUpdatedTime;
/**
* setter & getter
*/
@Override
public String toString() {
StringBuilder buffer = new StringBuilder("Space:");
buffer.append("public name:").append(publicName).append(", ");
buffer.append("private name:").append(privateName).append(", ");
buffer.append("is actived:").append(isActive).append(", ");
buffer.append("lastUpdatedTime:").append(lastUpdatedTime.getTime());
return buffer.toString();
}
}
3、 服务接口的定义如下:
import java.util.List;
import test.remote.dto.Space;
/**
*
* @author gogo
*
*/
public interface SpaceService {
List showSpaceNames(); //返回名字集合
Space findSpace(String id);//找到空间名字
boolean updateSpaceName(String name); //更新空间名字
}
4、服务接口实现类:
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.remoting.caucho.HessianServiceExporter;
import test.remote.dto.Space;
import test.remote.service.SpaceService;
/**
* 这个是一个远程接口的测试实现<br>
* 该接口会由spring的 {@link HessianServiceExporter}以Http服务的形式暴露.<br>
* 客户端会依赖Hessian实现
* @see HessianServiceExporter
* @author gogo
*
*/
public class SpaceServiceImpl implements SpaceService{
private static final Log log = LogFactory.getLog(SpaceServiceImpl.class);
private Space createSpace() {
Space space = new Space();
space.setPublicName("roosher-space");
space.setPrivateName("my-private-room");
space.setActive(true);
space.setLastUpdatedTime(new Date());
return space;
}
public Space findSpace(String id) {
// TODO Auto-generated method stub
log.debug("find space id is :" + id);
return createSpace();
}
public List showSpaceNames() {
// TODO Auto-generated method stub
List names = new ArrayList<String>();
for (int i = 0; i < 10; i++) {
names.add("Hello space "+ i);
}
return names;
}
public boolean updateSpaceName(String name) {
// TODO Auto-generated method stub
log.debug("updated space name : " + name );
return true;
}
}
5、test-remote.xml的内容:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:p="http://www.springframework.org/schema/p"
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-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<bean
class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"
p:order="1"></bean>
<bean id="spaceService" class="test.service.impl.SpaceServiceImpl">
</bean>
<bean class="org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter">
</bean>
<bean name="/SpaceHessian"
class="org.springframework.remoting.caucho.HessianServiceExporter"
p:serviceInterface="test.remote.service.SpaceService"
p:service-ref="spaceService">
</bean>
<bean name="/SpaceBurlap"
class="org.springframework.remoting.caucho.BurlapServiceExporter"
p:serviceInterface="test.remote.service.SpaceService"
p:service-ref="spaceService">
</bean>
</beans>
二、客户端的两种实现:
1、基于spring的实现,采用org.springframework.remoting.caucho.HessianProxyFactoryBean实现,相关配置如下:
<bean id="spaceServiceHessian"
class="org.springframework.remoting.caucho.HessianProxyFactoryBean">
<property name="serviceUrl"
value="http://localhost:8080/test/remote/SpaceHessian" />
<property name="serviceInterface" value="test.remote.service.SpaceService" />
</bean>
<bean id="spaceServiceBurlap"
class="org.springframework.remoting.caucho.BurlapProxyFactoryBean">
<property name="serviceUrl"
value="http://localhost:8080/test/remote/SpaceBurlap" />
<property name="serviceInterface" value="test.remote.service.SpaceService" />
</bean>
注意到里面的URL了没? 其中 http://localhost:8080/test/remote/SpaceHessian 的/SpaceHessian 对应的是之前在remote-test.xml中配置的<bean name="/SpaceHessian"> </bean>的URI.
然后通过spring获取上下文之后,就可以直接注入 SpaceService service = context.getBean("spaceServiceBurlap");
2、就是基于Hessian 自己提供的客户端,这里展示的是Java版本.
package test.remote;
import java.net.MalformedURLException;
import java.util.List;
import com.caucho.hessian.client.HessianProxyFactory;
import test.remote.dto.Space;
import test.remote.service.SpaceService;
/**
* 连接客户端。测试时要注意 url的ip地址.
* @see Space
* @author gogo
*
*/
public class SpaceClient {
public static void main(String[] args) {
String url = "http://192.168.0.9:8080/test/remote/SpaceHessian";
HessianProxyFactory factory = new HessianProxyFactory();
try {
SpaceService spaceService = (SpaceService) factory.create(
SpaceService.class, url);
System.out.println(spaceService.findSpace("testid"));
System.out.println(spaceService.updateSpaceName("whatever"));
List spaceNames = spaceService.showSpaceNames();
System.out.println("\r\nGet space names:");
for (int i = 0; i < spaceNames.size(); i++) {
System.out.print(spaceNames.get(i) + ", ");
}
System.out.println();
System.out.println("space names list finished");
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
}
三、测试结果:
Space:public name:roosher-space, private name:my-private-room, is actived:true,
lastUpdatedTime:1282196778538
true
Get space names:
Hello space 0, Hello space 1, Hello space 2, Hello space 3, Hello space 4, Hello space 5
, Hello space 6, Hello space 7, Hello space 8, Hello space 9,
space names list finished
