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快速入门中会给出一些基本使用场景下的配置方式,更详细的使用文档请参考用户指南.

如果要执行快速入门介绍中的例子,你需要:

  • JDK 1.7或更高版本。
  • java依赖管理工具,如MavenGradle

简单调用示例

  1. 在pom中添加依赖

     <dependency>
         <groupId>com.weibo</groupId>
         <artifactId>motan-core</artifactId>
         <version>0.1.1</version>
     </dependency>
     <dependency>
         <groupId>com.weibo</groupId>
         <artifactId>motan-transport-netty</artifactId>
         <version>0.1.1</version>
     </dependency>
     
     <!-- only needed for spring-based features -->
     <dependency>
         <groupId>com.weibo</groupId>
         <artifactId>motan-springsupport</artifactId>
         <version>0.1.1</version>
     </dependency>
     <dependency>
         <groupId>org.springframework</groupId>
         <artifactId>spring-context</artifactId>
         <version>4.2.4.RELEASE</version>
     </dependency>
  2. 为调用方和服务方创建公共接口。

    src/main/java/quickstart/FooService.java

    package quickstart;
    
    public interface FooService {
        public String hello(String name);
    }
  3. 编写业务接口逻辑、创建并启动RPC Server。

    src/main/java/quickstart/FooServiceImpl.java

    package quickstart;
    
    public class FooServiceImpl implements FooService {
    
        public String hello(String name) {
            System.out.println(name + " invoked rpc service");
            return "hello " + name;
        }
    }

    src/main/resources/motan_server.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:motan="http://api.weibo.com/schema/motan"
    	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
       http://api.weibo.com/schema/motan http://api.weibo.com/schema/motan.xsd">
    
        <!-- service implemention bean -->
        <bean id="serviceImpl" class="quickstart.FooServiceImpl" />
        <!-- exporting service by Motan -->
        <motan:service interface="quickstart.FooService" ref="serviceImpl" export="8002" />
    </beans>
    `src/main/java/quickstart/Server.java`
    
    package quickstart;
    
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    public class Server {
    
        public static void main(String[] args) throws InterruptedException {
            ApplicationContext applicationContext = new ClassPathXmlApplicationContext("classpath:motan_server.xml");
            System.out.println("server start...");
        }
    }

    执行Server类中的main函数将会启动Motan服务,并监听8002端口.

  4. 创建并执行RPC Client。

    src/main/resources/motan_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:motan="http://api.weibo.com/schema/motan"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
       http://api.weibo.com/schema/motan http://api.weibo.com/schema/motan.xsd">
    
        <!-- reference to the remote service -->
        <motan:referer id="remoteService" interface="quickstart.FooService" directUrl="localhost:8002"/>
    </beans>

    src/main/java/quickstart/Client.java

    package quickstart;
    
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    
    public class Client {
    
        public static void main(String[] args) throws InterruptedException {
            ApplicationContext ctx = new ClassPathXmlApplicationContext("classpath:motan_client.xml");
            FooService service = (FooService) ctx.getBean("remoteService");
            System.out.println(service.hello("motan"));
        }
    }

    执行Client类中的main函数将执行一次远程调用,并输出结果。

集群调用示例

在集群环境下使用Motan需要依赖外部服务发现组件,目前支持consul或zookeeper。

使用Consul作为注册中心

Consul安装与启动

安装(官方文档
# 这里以linux为例
wget https://releases.hashicorp.com/consul/0.6.4/consul_0.6.4_linux_amd64.zip
unzip consul_0.6.4_linux_amd64.zip
sudo mv consul /bin
启动(官方文档
测试环境启动:
consul agent -dev

ui后台 http://localhost:8500/ui

Motan-Consul配置

  1. 在server和client中添加motan-registry-consul依赖

    <dependency>
        <groupId>com.weibo</groupId>
        <artifactId>motan-registry-consul</artifactId>
        <version>0.1.1</version>
    </dependency>
  2. 在server和client的配置文件中分别增加consul registry定义。

    <motan:registry regProtocol="consul" name="my_consul" address="127.0.0.1:8500"/>
  3. 在Motan client及server配置改为通过registry服务发现。

    client

        <motan:referer id="remoteService" interface="quickstart.FooService" registry="my_consul"/>

    server

        <motan:service interface="quickstart.FooService" ref="serviceImpl" registry="my_consul" export="8002" />
  4. server程序启动后,需要显式调用心跳开关,注册到consul。

    MotanSwitcherUtil.setSwitcherValue(MotanConstants.REGISTRY_HEARTBEAT_SWITCHER, true)
  5. 进入ui后台查看服务是否正常提供调用

  6. 启动client,调用服务

使用ZooKeeper作为注册中心

ZooKeeper安装与启动(官方文档)

单机版安装与启动

wget http://mirrors.cnnic.cn/apache/zookeeper/zookeeper-3.4.8/zookeeper-3.4.8.tar.gz
tar zxvf zookeeper-3.4.8.tar.gz

cd zookeeper-3.4.8/conf/
cp zoo_sample.cfg zoo.cfg

cd ../
sh bin/zkServer.sh start

Motan-ZooKeeper配置

  1. 在server和client中添加motan-registry-zookeeper依赖

    <dependency>
        <groupId>com.weibo</groupId>
        <artifactId>motan-registry-zookeeper</artifactId>
        <version>0.1.1</version>
    </dependency>
  2. 在server和client的配置文件中分别增加zookeeper registry定义。

    zookeeper为单节点

    <motan:registry regProtocol="zookeeper" name="my_zookeeper" address="127.0.0.1:2181"/>

    zookeeper多节点集群

    <motan:registry regProtocol="zookeeper" name="my_zookeeper" address="127.0.0.1:2181,127.0.0.1:2182,127.0.0.1:2183"/>
  3. 在Motan client及server配置改为通过registry服务发现。

    client

    <motan:referer id="remoteService" interface="quickstart.FooService" registry="my_zookeeper"/>

    server

    <motan:service interface="quickstart.FooService" ref="serviceImpl" registry="my_zookeeper" export="8002" />
  4. server程序启动后,需要显式调用心跳开关,注册到zookeeper。

    MotanSwitcherUtil.setSwitcherValue(MotanConstants.REGISTRY_HEARTBEAT_SWITCHER, true)
  5. 启动client,调用服务