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dubbo的Hessian协议的使用

因为在项目中需要在dubbo的消费者和生产者之间传递文件，目前使用的是字节数组作为参数的形式，但是看到官网提供的文档说Hessian协议适合传递文件，所以自己做了一个例子，测试后是可以正常运行的。下面是详细代码：(我是通过tomcat发布的服务)

一、1、消费方和服务方都要依赖的API

 1 package com.isoftstone.iics.email.services.send.common.test;
 2 
 3 import java.io.InputStream;
 4 
 5 public interface HessianTestService {
 6     
 7     public String sayHello(String message);
 8     
 9     public String upload(String filename, InputStream is);
10 
11 }

2、下面是需要依赖的jar包

使用dobbo需要的jar和外部API

   <dependency>
        <groupId>com.caucho</groupId>
        <artifactId>hessian</artifactId>
        <version>4.0.7</version>
   </dependency>

使用hessian协议还需要的依赖hessian包

3、因为Hessian协议底层使用的是HTTP,所以需要修改一下web.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" 
 3 "http://java.sun.com/dtd/web-app_2_3.dtd" >
 4 <web-app>
 5    <display-name>hessian</display-name>
 6    
 7    <!-- 监听spring上下文的加载 -->
 8     <listener>
 9         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
10     </listener>
11     <context-param>
12         <param-name>contextConfigLocation</param-name>
13         <param-value>classpath*:spring_echannel_dependence.xml</param-value>
14     </context-param>
15    
16    <servlet>
17        <servlet-name>dubbo</servlet-name>
18        <servlet-class>com.alibaba.dubbo.remoting.http.servlet.DispatcherServlet</servlet-class>
19    </servlet>
20    <servlet-mapping>
21        <servlet-name>dubbo</servlet-name>
22        <url-pattern>/*</url-pattern>
23    </servlet-mapping>
24 
25 </web-app>

4、下面是一些Spring的配置文件和Spring的生产者配置文件

spring_echannel_dependence.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 3     xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
 4     xsi:schemaLocation="
 5             http://www.springframework.org/schema/beans 
 6             http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
 7             http://www.springframework.org/schema/aop 
 8             http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
 9             http://www.springframework.org/schema/context
10             http://www.springframework.org/schema/context/spring-context-3.0.xsd">
11             
12    <context:component-scan base-package="com.yj.fenghao" annotation-config="true" use-default-filters="true"></context:component-scan>
13             
14    <import resource="spring_dubbo_provider.xml"/>
15    
16      
17 </beans>

spring_dubbo_provider.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 3     xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
 4     xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
 5     xsi:schemaLocation="
 6             http://www.springframework.org/schema/beans 
 7             http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
 8             http://www.springframework.org/schema/aop 
 9             http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
10             http://www.springframework.org/schema/context
11             http://www.springframework.org/schema/context/spring-context-3.0.xsd
12             http://code.alibabatech.com/schema/dubbo 
13             http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
14             
15     <dubbo:application name="dubbo-hessian-provider"></dubbo:application>
16     <dubbo:protocol name="dubbo" port="20880" ></dubbo:protocol>
17     <dubbo:registry address="zookeeper://*****:2281" check="false"></dubbo:registry>
18      <dubbo:protocol name="hessian" port="8084" server="servlet" contextpath="hessian-test"></dubbo:protocol>
19     <dubbo:service protocol="hessian" interface="com.isoftstone.iics.email.services.send.common.test.HessianTestService" ref="HessianTest" timeout="100000" ></dubbo:service>
20 </beans>

hessian协议的端口和服务的端口相同，server使用的是servlet,contextpath使用的项目名称（dubbo文档指出应该是servlet的上下文），如果去掉的话，在测试的时候会找不到远程方法

5、下面是接口的实现类

 1 package com.yj.fenghao.hessian;
 2 
 3 import java.io.File;
 4 import java.io.FileNotFoundException;
 5 import java.io.FileOutputStream;
 6 import java.io.IOException;
 7 import java.io.InputStream;
 8 
 9 import org.apache.commons.io.IOUtils;
10 import org.springframework.stereotype.Component;
11 
12 
13 
14 
15 
16 
17 
18 import com.isoftstone.iics.email.services.send.common.test.HessianTestService;
19 
20 @Component("HessianTest")
21 public class HessianRFCServiceImpl implements HessianTestService{
22 
23     public String sayHello(String message) {
24         System.out.println("
 message is "+message);
25         return "SUCESS";
26     }
27 
28     public String upload(String filename, InputStream file ) {
29         FileOutputStream fos=null;
30         try {
31             fos=new FileOutputStream(new File("f:/"+filename));
32             IOUtils.copy(file, fos);
33         } catch (FileNotFoundException e) {
34             e.printStackTrace();
35             return "Failure";
36         } catch (IOException e) {
37             e.printStackTrace();
38             return "Failure";
39         }finally{
40             if(fos!=null){
41                 IOUtils.closeQuietly(fos);
42             }
43             if(file!=null){
44                 IOUtils.closeQuietly(file);
45             }
46             }
47         return "SUCESS";
48     }
49 
50 }

6、因为使用的是maven所以在贴一下pom.xml文件

pom.xml

 1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 2   <modelVersion>4.0.0</modelVersion>
 3   <groupId>hessian</groupId>
 4   <artifactId>hessian-test</artifactId>
 5   <version>0.0.1-SNAPSHOT</version>
 6   <packaging>war</packaging>
 7   
 8   <properties>
 9       <spring.release>3.0.6.RELEASE</spring.release>
10   </properties>
11    <dependencies>
12      <dependency>
13         <groupId>org.springframework</groupId>
14         <artifactId>spring-core</artifactId>
15         <version>${spring.release}</version>
16      </dependency>
17      <dependency>
18         <groupId>org.springframework</groupId>
19         <artifactId>spring-web</artifactId>
20         <version>${spring.release}</version>
21      </dependency>
22      <dependency>
23         <groupId>org.springframework</groupId>
24         <artifactId>spring-beans</artifactId>
25         <version>${spring.release}</version>
26      </dependency>
27      <dependency>
28         <groupId>org.springframework</groupId>
29         <artifactId>spring-context</artifactId>
30         <version>${spring.release}</version>
31     </dependency>
32     <dependency>
33         <groupId>org.springframework</groupId>
34         <artifactId>spring-aop</artifactId>
35         <version>${spring.release}</version>
36     </dependency>
37     <dependency>
38         <groupId>org.springframework</groupId>
39         <artifactId>spring-context-support</artifactId>
40         <version>${spring.release}</version>
41     </dependency>
42     <dependency>
43         <groupId>org.springframework</groupId>
44         <artifactId>spring-aspects</artifactId>
45         <version>${spring.release}</version>
46     </dependency>
47     <dependency>
48         <groupId>org.apache.commons</groupId>
49         <artifactId>commons-io</artifactId>
50         <version>1.3.2</version>
51     </dependency>
52     <dependency>
53         <groupId>log4j</groupId>
54         <artifactId>log4j</artifactId>
55         <version>1.2.17</version>
56     </dependency>
57     <dependency>
58         <groupId>junit</groupId>
59         <artifactId>junit</artifactId>
60         <version>4.12</version>
61     </dependency>
62     <dependency>
63         <groupId>com.caucho</groupId>
64         <artifactId>hessian</artifactId>
65         <version>4.0.7</version>
66     </dependency>
67     <dependency>
68         <groupId>org.codehaus.castor</groupId>
69         <artifactId>castor-core</artifactId>
70         <version>1.3.3</version>
71     </dependency>
72     <dependency>
73         <groupId>org.codehaus.castor</groupId>
74         <artifactId>castor-xml</artifactId>
75         <version>1.3.3</version>
76     </dependency>
77     
78    </dependencies>
79 </project>

有一些冗余的包

现在启动Tomcat,一个可以使用hessian协议的生产者就注册好了

二、下面是对服务的测试，我是在同一个工程中写的src/test/java和src/test/resource中写的测试类和添加的配置

spring_dubbo_consumer.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 3     xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
 4     xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
 5     xsi:schemaLocation="
 6             http://www.springframework.org/schema/beans 
 7             http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
 8             http://www.springframework.org/schema/aop 
 9             http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
10             http://www.springframework.org/schema/context
11             http://www.springframework.org/schema/context/spring-context-3.0.xsd
12             http://code.alibabatech.com/schema/dubbo 
13             http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
14             
15     <dubbo:application name="dubbo-hessian-consumer"></dubbo:application>
16      <dubbo:registry address="zookeeper://****:2281" check="false"></dubbo:registry> 
17      <dubbo:reference interface="com.isoftstone.iics.email.services.send.common.test.HessianTestService" id="hessian" timeout="100000"  check="false" />
18 </beans>

测试类：

 1 package com.yj.fenghao.hessiantest;
 2 
 3 import java.io.FileInputStream;
 4 import java.io.FileNotFoundException;
 5 
 6 import org.junit.Ignore;
 7 import org.springframework.context.support.ClassPathXmlApplicationContext;
 8 
 9 import com.isoftstone.iics.email.services.send.common.test.HessianTestService;
10 
11 public class HessianTest {
12     
13     ClassPathXmlApplicationContext context;
14     public HessianTest(){
15         context=new ClassPathXmlApplicationContext(new String[]{
16                 "classpath*:spring_dubbo_consumer.xml"
17         });
18     }
19     
20     public static final HessianTest test=new HessianTest();
21     
22     @Ignore
23     @org.junit.Test
24     public void Test(){
25         HessianTestService hessian = (HessianTestService)test.context.getBean("hessian");
26         String sayHello = hessian.sayHello("ni hao test is pass");
27         System.out.println("
result is "+sayHello);
28     }
29     
30     @org.junit.Test
31     public void TestIO(){
32         HessianTestService hessian = (HessianTestService)test.context.getBean("hessian");
33         try {
34             String result = hessian.upload("1234.pdf", new FileInputStream("d:/1234.pdf"));
35             System.out.println("
result is "+result);
36         } catch (FileNotFoundException e) {
37             e.printStackTrace();
38         }
39     }
40 
41 }

结束语：看来做事总要换个思路，以前做这个，刚刚开始总想做成直连的，总是不成功，后来使用zooker注册中心，直接就成功了！

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原文地址：https://www.cnblogs.com/nihaofenghao/p/6427646.html