dubbo 学习笔记 -- provider端

服务端的配置文件：    provider.xml

<?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         ">
<!-- Application name -->
<dubbo:application name="Frame"  />
<!-- registry address, used for service to register itself -->
<dubbo:registry address="multicast://224.5.6.7:1234" />
<!-- expose this service through dubbo protocol, through port 20880 -->
<dubbo:protocol name="dubbo" port="20880" />
<!-- which service interface do we expose? -->
<dubbo:service interface="merchant.shop.service.IHelloService" ref="helloService" />
    <!-- bean配置 -->
    <bean id="helloService"
        class="merchant.shop.service.impl.HelloServiceImpl">
    </bean>
</beans>

此处interface的地址要与consumer端的一致，所以在服务端工程中新建了和客户端工程一样的路径来保存service

spring 配置文件 ： providerApplicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    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-2.0.xsd">

    <!-- spring 与 ibatis 衔接 -->
    <bean id="sqlMapClient" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">
        <property name="configLocation" value="provider-sql-map-config.xml"></property>
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!-- 数据源基本配置 -->
    <bean id="dataSource"
        class="org.springframework.jndi.JndiObjectFactoryBean">
        <property name="jndiName">
            <value>java:/comp/env/test</value>
        </property>
    </bean>
    <!-- 事务配置 -->
     <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource"></property>
    </bean>

<!-- 声明式事务管理 -->
    <bean id="baseTransactionProxy" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" abstract="true">
        <property name="transactionManager" ref="transactionManager"></property>
        <property name="transactionAttributes">
            <props>
                <prop key="add*">PROPAGATION_REQUIRED</prop>
                <prop key="edit*">PROPAGATION_REQUIRED</prop>
                <prop key="*">PROPAGATION_REQUIRED,readOnly</prop>
            </props>
        </property>
    </bean>
</beans>

服务端需要启动的两个文件如下 ：

package com.sitech.comm.dubbo;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Provider {
    public static void init() throws Exception {
        ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] {"provider.xml"});
        context.start();
        singleton();
    }
    public static ApplicationContext context = null;
     public static ApplicationContext singleton() {
            if (context == null) {
                context = new ClassPathXmlApplicationContext(new String[] {"providerApplicationContext.xml"});
            }
             return context;
     };
}

package com.sitech.comm.dubbo;


import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;

import com.sitech.comm.log.LogWritter;

public class ProviderInit extends HttpServlet {

    public void init() throws ServletException {
        try {
            System.out.println("初始化dubbo服务端");
            Provider.init();
        } catch (Exception e) {
            System.out.println("初始化dubbo服务端失败");
        }
    }

}

web.xml 中增加启动如下 ：

<servlet>
        <servlet-name>ProviderInit</servlet-name>
        <servlet-class>
            com.sitech.comm.dubbo.ProviderInit
        </servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>

consumer客户端就可以远程调用另一个工程的服务了

这里出问题，一般都是配置文件的问题，如数据库的连接，spring 与 ibatis 衔接