dubbo学习笔记 第五章构建dubbo的web应用 下

转载 于 2017-10-26 15:59:00 发布 · 100 阅读 · 0 ·
CC 4.0 BY-SA版权
原文链接：https://my.oschina.net/u/3702/blog/1556723
文章标签：

#测试 #json #大数据

本文介绍了如何在Eclipse上搭建一个使用Dubbo的消费者服务，包括Maven Web工程的配置、Spring MVC的服务调用实现及Dubbo服务的配置。

上一章节是搭建了一个provider的web服务，接下来搭建一个consumer的web服务

一、消费者服务

在eclipse上搭建一个maven的web工程，具体如何搭建，这里不做详细介绍，我的工程名称叫做dubbo-web-client，在这个工程中，pom.xml配置的内容如下：

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.ws</groupId>
  <artifactId>dubbo-web-client</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>dubbo-web-client Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
   <!-- 单元测试用的包，仅测试时使用，不发布（scope为test） -->
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.12</version>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-test</artifactId>
			<version>4.2.5.RELEASE</version>
			<scope>test</scope>
		</dependency>
        <dependency>
			<groupId>org.apache.logging.log4j</groupId>
			<artifactId>log4j-core</artifactId>
			<version>2.1</version>
		</dependency>
		<dependency>
			<groupId>org.apache.logging.log4j</groupId>
			<artifactId>log4j-slf4j-impl</artifactId>
			<version>2.1</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>4.2.5.RELEASE</version>
		</dependency>
		<!-- 加密相关包 -->
		<dependency>
			<groupId>commons-codec</groupId>
			<artifactId>commons-codec</artifactId>
			<version>1.10</version>
		</dependency>
		<!-- json转换需要的包 -->
		<dependency>
			<groupId>com.fasterxml.jackson.jaxrs</groupId>
			<artifactId>jackson-jaxrs-base</artifactId>
			<version>2.6.1</version>
		</dependency>

		<!-- 单元测试用的包，仅测试时使用，不发布（scope为test） -->
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.12</version>
			<scope>test</scope>
		</dependency>
		
		<!-- jsp包，不适用jsp时可删除此依赖，由容器提供，不发布 （scope为provided） -->
		<dependency>
			<groupId>javax.servlet.jsp</groupId>
			<artifactId>jsp-api</artifactId>
			<version>2.2</version>
			<scope>provided</scope>
		</dependency>
		<!-- servlet包，不适用jsp和servlet时可删除此依赖，由容器提供，不发布 （scope为provided） -->
		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>javax.servlet-api</artifactId>
			<version>3.0.1</version>
			<scope>provided</scope>
			<exclusions>
				<exclusion>
					<groupId>org.apache.geronimo.specs</groupId>
					<artifactId>geronimo-servlet_2.5_spec</artifactId>
				</exclusion>
			</exclusions>
		</dependency>

		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-lang3</artifactId>
			<version>3.4</version>
		</dependency>

		<!-- Oracle-jdbc驱动 -->
		<dependency>
			<groupId>com.oracle</groupId>
			<artifactId>ojdbc14</artifactId>
			<version>10.2.0.4.0</version>
		</dependency>
		<!-- Hibernate5 -->
		<dependency>
			<groupId>org.hibernate</groupId>
			<artifactId>hibernate-core</artifactId>
			<version>5.0.0.Final</version>
		</dependency>
		<!-- spring持久层 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-orm</artifactId>
			<version>4.2.5.RELEASE</version>
		</dependency>
		<!-- 阿里巴巴的数据库连接池 -->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid</artifactId>
			<version>1.0.18</version>
		</dependency>
		<!-- 事务控制相关 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-aop</artifactId>
			<version>4.2.5.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>org.aspectj</groupId>
			<artifactId>aspectjweaver</artifactId>
			<version>1.8.6</version>
		</dependency>
		<dependency>
			<groupId>org.apache.curator</groupId>
			<artifactId>curator-framework</artifactId>
			<version>2.5.0</version>
		</dependency>
		<dependency>
			<groupId>com.google.guava</groupId>
			<artifactId>guava</artifactId>
			<version>16.0.1</version>
			<scope>compile</scope>
		</dependency>
    
		<!-- spring-redis -->
		<dependency>
			<groupId>org.springframework.data</groupId>
			<artifactId>spring-data-redis</artifactId>
			<version>1.7.1.RELEASE</version>
		</dependency>
		<dependency>
			<groupId>redis.clients</groupId>
			<artifactId>jedis</artifactId>
			<version>2.8.1</version>
		</dependency>
		<!-- spring-session -->
		<dependency>
			<groupId>org.springframework.session</groupId>
			<artifactId>spring-session</artifactId>
			<version>1.2.1.RELEASE</version>
		</dependency>

		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-pool2</artifactId>
			<version>2.2</version>
		</dependency>

		<dependency>
			<groupId>commons-beanutils</groupId>
			<artifactId>commons-beanutils</artifactId>
			<version>1.9.2</version>
		</dependency>

	   <dependency>
		<groupId>commons-httpclient</groupId>
		<artifactId>commons-httpclient</artifactId>
		<version>3.1</version>
	  </dependency>

		<dependency>
			<groupId>org.apache.commons</groupId>
			<artifactId>commons-io</artifactId>
			<version>1.3.2</version>
		</dependency>
	<dependency>
			<groupId>jdom</groupId>
			<artifactId>jdom</artifactId>
			<version>1.1</version>
		</dependency>

		<!-- dubbo包 -->
		<dependency>
			<groupId>io.netty</groupId>
			<artifactId>netty</artifactId>
			<version>3.7.0.Final</version>
		</dependency>
		<dependency>
			<groupId>org.apache.zookeeper</groupId>
			<artifactId>zookeeper</artifactId>
			<version>3.4.6</version>
			<exclusions>
				<exclusion>
					<artifactId>log4j</artifactId>
					<groupId>log4j</groupId>
				</exclusion>
				<exclusion>
					<artifactId>slf4j-log4j12</artifactId>
					<groupId>org.slf4j</groupId>
				</exclusion>
			</exclusions>
		</dependency>
		<dependency>
			<groupId>org.apache.curator</groupId>
			<artifactId>curator-framework</artifactId>
			<version>2.5.0</version>
		</dependency>
		<dependency>
			<groupId>com.google.guava</groupId>
			<artifactId>guava</artifactId>
			<version>16.0.1</version>
			<scope>compile</scope>
		</dependency>
		<dependency>
			<groupId>com.esotericsoftware.kryo</groupId>
			<artifactId>kryo</artifactId>
			<version>2.24.0</version>
		</dependency>
		<dependency>
			<groupId>de.javakaffee</groupId>
			<artifactId>kryo-serializers</artifactId>
			<version>0.26</version>
		</dependency>
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>dubbo</artifactId>
			<version>2.5.6</version>
			<exclusions>  
                <exclusion>  
                    <artifactId>spring</artifactId>  
                    <groupId>org.springframework</groupId>  
                </exclusion>  
            </exclusions>  
		</dependency>
	 <dependency>
            <groupId>com.ws</groupId>
            <artifactId>dubbo-ws-facade</artifactId>
            <version>1.0-SNAPSHOT</version>
        </dependency>
  </dependencies>
  <build>
    <finalName>dubbo-web-client</finalName>
  </build>
</project>

基本跟上一章节的provider的提供者服务相同，这里就不做累述。

在消费者中，我们用的是spring mvc来实现服务调用，请求调用的代码如下（十分简单）：

package com.ws.control;

import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import com.ws.entity.User;
import com.ws.facade.UserFacade;



@Controller
@RequestMapping("/consumer")
public class ConsumerControl {

    @Autowired
    private UserFacade userFacade;

	@RequestMapping("/find")
    public void FindallConsumer(Map<String, Object> context) throws Exception {
		
		   System.out.println("insert:" + userFacade.insert(new User()));
	        System.out.println("delete:" + userFacade.delete(1));
	        User user = userFacade.select(1);
	        System.out.println("select:" + user.getName());
	        context.put("user", user);
	}

}

其中UserFacade来自pom.xml中对dubbo-ws-facade的引用，不再相信介绍。

配置消费者dubbo服务的配置文件如下：

<?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:dubbo="http://code.alibabatech.com/schema/dubbo"
	xsi:schemaLocation="http://www.springframework.org/schema/beans  
        http://www.springframework.org/schema/beans/spring-beans.xsd  
        http://code.alibabatech.com/schema/dubbo  
        http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

	<!-- 消费方应用名，用于计算依赖关系，不是匹配条件，不要与提供方一样 -->
	<dubbo:application name="dubbo-consumer" />
	

	<dubbo:consumer timeout="5000" />
	<!-- 使用zookeeper注册中心暴露服务地址 -->
	<!-- 注册中心地址 -->
	<dubbo:registry protocol="zookeeper" address="${dubbo.registry.address}" />
	
	<!-- 用户服务接口 -->
	<dubbo:reference interface="com.ws.facade.UserFacade" id="userFacadeClient" protocol="dubbo" check="false"/>


</beans>

${dubbo.registry.address}对应：

155006_LZuf_3702.png

接下来同样要在spring-context.xml中实现

<?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:context="http://www.springframework.org/schema/context"
	xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:aop="http://www.springframework.org/schema/aop" xmlns:util="http://www.springframework.org/schema/util"
	xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.1.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd"
	default-autowire="byName" default-lazy-init="false">

	<!-- 采用注释的方式配置bean -->
 	<context:annotation-config /> 

	<!-- 配置要扫描的包 -->
	<context:component-scan base-package="com.ws" /> 
	<!-- json转换 -->
	<mvc:annotation-driven>
		<mvc:message-converters>
			<bean class="org.springframework.http.converter.StringHttpMessageConverter" />
			<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter" />
		</mvc:message-converters>
	</mvc:annotation-driven>
<!-- 文件上传 -->
	<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
		<property name="defaultEncoding" value="utf-8" />
		<property name="maxUploadSize" value="10485760000" />
		<property name="maxInMemorySize" value="40960" />
	</bean>


	
	<!-- 读入配置属性文件 -->
	<context:property-placeholder location="classpath:service.properties" />

	<!-- proxy-target-class默认"false",更改为"ture"使用CGLib动态代理 -->
	
	
	<import resource="dubbo-consumer.xml" />

</beans>

总体目录结构如下：

155240_FEZd_3702.png

为了在web工程跑springmvc 我们还要在web.xml 做相应配置：

<?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="gw-service-merchant" version="2.5">

    <display-name>dubbo-web-client</display-name>

<!--     <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring-context.xml</param-value>
    </context-param>
 -->
 
 <filter>
		<filter-name>encoding</filter-name>
		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
		<init-param>
			<param-name>encoding</param-name>
			<param-value>UTF-8</param-value>
		</init-param>
	</filter>
	<filter-mapping>
		<filter-name>encoding</filter-name>
		<url-pattern>*.shtml</url-pattern>
		<url-pattern>*.json</url-pattern>
	</filter-mapping>
<servlet>
		<servlet-name>springServlet</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>classpath*:/spring-context.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>springServlet</servlet-name>
		<url-pattern>*.shtml</url-pattern>
		<url-pattern>*.json</url-pattern>
	</servlet-mapping>
	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>
	<error-page>
		<error-code>404</error-code>
		<location>/404.jsp</location>
	</error-page>
	<error-page>
		<error-code>500</error-code>
		<location>/500.jsp</location>
	</error-page>
</web-app>

最后连同上一节的dubbo-ws-server工程一起部署到Tomcat中运行起来，在浏览器中输入地址：

http://localhost:8080/dubbo-web-client/consumer/find.shtml

如果程序没有问题，就可以看看控制台打印：

155839_54Kh_3702.png

转载于:https://my.oschina.net/u/3702/blog/1556723

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