RPC远程调用——Dubbo
1.安装Zookeeper
a.下载Zookeeper后解压
b.进入根目录下的conf文件夹，将zoo_sample.cfg改成bak文件，并复制一个修改为zoo.cfg，修改相关配置
# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just
# example sakes.
#此处设置data和log的路径
dataDir=D:/JavaTools/zookeeper/server1/zookeeper-3.4.11/zooData
dataLogDir=D:/JavaTools/zookeeper/server1/zookeeper-3.4.11/zooLog
# the port at which the clients will connect
clientPort=2181
# the maximum number of client connections.
# increase this if you need to handle more clients
#maxClientCnxns=60
#
# Be sure to read the maintenance section of the
# administrator guide before turning on autopurge.
#
# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
#
# The number of snapshots to retain in dataDir
#autopurge.snapRetainCount=3
# Purge task interval in hours
# Set to "0" to disable auto purge feature
#autopurge.purgeInterval=1
c.进入bin目录，双击zkServer.cmd启动Zookeeper（关闭窗口则停止）
2.创建服务端
a.导入依赖
<dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.5.3</version> <exclusions> <exclusion> <artifactId>spring</artifactId> <groupId>org.springframework</groupId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> <version>3.4.5</version> <exclusions> <exclusion> <groupId>log4j</groupId> <artifactId>log4j</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>com.github.sgroschupf</groupId> <artifactId>zkclient</artifactId> <version>0.1</version> </dependency>
b.创建服务接口
public interface DubboServer { public String hello(String name); }
c.创建接口实现类
public class DubboServerImp implements DubboServer { @Override public String hello(String name) { return "hello"+name; } }
d.创建spring-dubbo-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 "> <!-- 提供方应用名称信息，这个相当于起一个名字，在dubbo管理页面比较清晰是哪个应用暴露出来的 --> <dubbo:application name="user_provider"/> <!-- 使用zookeeper注册中心注册服务 --> <dubbo:registry address="zookeeper://localhost:2181"/> <dubbo:protocol name="dubbo" port="20880"/> <!-- <dubbo:monitor protocol="registry"/> --> <!-- 暴露的服务接口 --> <dubbo:service interface="com.wode.server.DubboServer" ref="dubboServer" timeout="5000" retries="2" /> <bean id="dubboServer" class="com.wode.server.imp.DubboServerImp" /> </beans>
3.创建客户端
a.引入相同的依赖
<dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.5.3</version> <exclusions> <exclusion> <artifactId>spring</artifactId> <groupId>org.springframework</groupId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> <version>3.4.5</version> <exclusions> <exclusion> <groupId>log4j</groupId> <artifactId>log4j</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>com.github.sgroschupf</groupId> <artifactId>zkclient</artifactId> <version>0.1</version> </dependency>
b.复制粘贴服务端的接口
public interface DubboServer { public String hello(String name); }
c.创建spring-dubbo-client.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 "> <!-- 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="user_consumer" /> <dubbo:registry address="zookeeper://localhost:2181"/> <!-- <dubbo:monitor protocol="registry"/> --> <!-- 注册中心配置 --> <dubbo:reference id="dubboServer" interface="com.wode.server.DubboServer" timeout="10000" check="false" /> </beans>
d.调用服务
@Controller public class DubboTestController { @Resource DubboServer server; //根据查询信息 @RequestMapping("/getMsg") public @ResponseBody String getMsg(HttpSession session, HttpServletRequest request,HttpServletResponse response){ String keyWord = request.getParameter("keyWord"); //调用服务 String result = server.hello(keyWord); return result; } }
注意：服务端和客户端的接口名称务必保持一致，连包名都要一致，不然会报Please check registry access list (whitelist/blacklist)的异常
