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Ray edited this page May 25, 2017 · 28 revisions

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

同步调用

  1. 在pom中添加依赖

     <dependency>
         <groupId>com.weibo</groupId>
         <artifactId>motan-core</artifactId>
         <version>RELEASE</version>
     </dependency>
     <dependency>
         <groupId>com.weibo</groupId>
         <artifactId>motan-transport-netty</artifactId>
         <version>RELEASE</version>
     </dependency>
     
     <!-- only needed for spring-based features -->
     <dependency>
         <groupId>com.weibo</groupId>
         <artifactId>motan-springsupport</artifactId>
         <version>RELEASE</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。

异步调用

异步调用与同步调用基本配置完全一样,只需要在接口类中加上@MotanAsync注解,然后client端稍作修改。server端不需要做任何修改。具体步骤如下:

  1. 在接口类上加@MotanAsync注解

    package quickstart;
    
    @MotanAsync
    public interface FooService {
        public String hello(String name);
    }
  2. 编译时,Motan自动生成异步service类,生成路径为target/generated-sources/annotations/,生成的类名为service名加上Async,例如service类名为FooService.java,则自动生成的类名为FooServiceAsync.java。 另外,需要将motan自动生产类文件的路径配置为项目source path,可以使用maven plugin或手动配置。pom.xml配置如下:

    <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>build-helper-maven-plugin</artifactId>
        <version>RELEASE</version>
        <executions>
            <execution>
                <phase>generate-sources</phase>
                <goals>
                    <goal>add-source</goal>
                </goals>
                <configuration>
                    <sources>
                        <source>${project.build.directory}/generated-sources/annotations</source>
                    </sources>
                </configuration>
            </execution>
        </executions>
    </plugin>
  3. 在client端配置motan_client.xml时,在同步调用配置的基础上,只需要修改referer的interface为Motan自动生成的接口类即可。

    <motan:referer id="remoteService" interface="quickstart.FooServiceAsync" directUrl="localhost:8002"/>
  4. 异步使用方式如下:

    public static void main(String[] args) {
        ApplicationContext ctx = new ClassPathXmlApplicationContext(new String[] {"classpath:motan_client.xml"});
    
        FooServiceAsync service = (FooServiceAsync) ctx.getBean("remoteService");
    
        // sync call
        System.out.println(service.hello("motan"));
    
        // async call
        ResponseFuture future = service.helloAsync("motan async ");
        System.out.println(future.getValue());
    
        // multi call
        ResponseFuture future1 = service.helloAsync("motan async multi-1");
        ResponseFuture future2 = service.helloAsync("motan async multi-2");
        System.out.println(future1.getValue() + ", " + future2.getValue());
    
        // async with listener
        FutureListener listener = new FutureListener() {
            @Override
            public void operationComplete(Future future) throws Exception {
                System.out.println("async call "
                        + (future.isSuccess() ? "sucess! value:" + future.getValue() : "fail! exception:"
                                + future.getException().getMessage()));
            }
        };
        ResponseFuture future3 = service.helloAsync("motan async multi-1");
        ResponseFuture future4 = service.helloAsync("motan async multi-2");
        future3.addListener(listener);
        future4.addListener(listener);
    }

具体代码可以参考demo模块

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>RELEASE</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>RELEASE</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

其他调用示例

提供YAR协议服务

YAR协议是php的一个rpc扩展,motan框架可以提供yar协议的RPC服务 1、引入motan-protocol-yar.jar

 <dependency>
     <groupId>com.weibo</groupId>
     <artifactId>motan-protocol-yar</artifactId>
     <version>RELEASE</version>
 </dependency>

2、在服务接口类上增加注解@YarConfig,声明服务的uri

 @YarConfig(path = "/openapi/yarserver/test")
 public interface YarService {
     public String hello(String name);
 }

3、配置protocol的name="yar"

 <motan:protocol id="demoYar" name="yar" .../>

4、配置service的export,使用yar协议提供服务

 <motan:service interface="com.weibo.motan.demo.service.YarService"
    export="demoYar:8003" .../>

具体配置见motan-demo模块 YAR协议使用yar-java进行解析,java作为YAR client时可以直接使用

使用注解方式配置motan

server端配置

1、声明Annotation用来指定需要解析的包名

 @Bean
 public AnnotationBean motanAnnotationBean() {
     AnnotationBean motanAnnotationBean = new AnnotationBean();
     motanAnnotationBean.setPackage("com.weibo.motan.demo.server");
     return motanAnnotationBean;
 }

2、配置ProtocolConfig、RegistryConfig、BasicServiceConfig的bean对象,功能与xml配置中的protocol、registry、basicService标签一致。

 @Bean(name = "demoMotan")
 public ProtocolConfigBean protocolConfig1() {
     ProtocolConfigBean config = new ProtocolConfigBean();
     config.setDefault(true);
     config.setName("motan");
     config.setMaxContentLength(1048576);
     return config;
 }

 @Bean(name = "registryConfig1")
 public RegistryConfigBean registryConfig() {
     RegistryConfigBean config = new RegistryConfigBean();
     config.setRegProtocol("local");
     return config;
 }

 @Bean
 public BasicServiceConfigBean baseServiceConfig() {
     BasicServiceConfigBean config = new BasicServiceConfigBean();
     config.setExport("demoMotan:8002");
     config.setGroup("testgroup");
     config.setAccessLog(false);
     config.setShareChannel(true);
     config.setModule("motan-demo-rpc");
     config.setApplication("myMotanDemo");
     config.setRegistry("registryConfig1");
     return config;
 }

3、service的实现类上添加@MotanService注解,注解的配置参数与xml配置方式的service标签一致。

 @MotanService(export = "demoMotan:8002")
 public class MotanDemoServiceImpl implements MotanDemoService {

     public String hello(String name) {
         System.out.println(name);
         return "Hello " + name + "!";
     }
 }

4、使用spring-boot启动服务

 @EnableAutoConfiguration
 @SpringBootApplication
 public class SpringBootRpcServerDemo {

     public static void main(String[] args) {
         System.setProperty("server.port", "8081");
         ConfigurableApplicationContext context =  SpringApplication.run(SpringBootRpcServerDemo.class, args);
       
     MotanSwitcherUtil.setSwitcherValue(MotanConstants.REGISTRY_HEARTBEAT_SWITCHER, true);
         System.out.println("server start...");
     }
 }

server端详细配置请参考motan-demo模块

client端配置

1、声明Annotation、protocolConfig、RegistryConfig的配置bean。方式与server端配置类似。

2、配置basicRefererConfig bean

 @Bean(name = "motantestClientBasicConfig")
 public BasicRefererConfigBean baseRefererConfig() {
     BasicRefererConfigBean config = new BasicRefererConfigBean();
     config.setProtocol("demoMotan");
     config.setGroup("motan-demo-rpc");
     config.setModule("motan-demo-rpc");
     config.setApplication("myMotanDemo");
     config.setRegistry("registry");
     config.setCheck(false);
     config.setAccessLog(true);
     config.setRetries(2);
     config.setThrowException(true);
     return config;
 }

3、在使用motan service 的对象上添加@MotanReferer注解,注册配置与xml方式的referer标签一致

 @RestController
 public class HelloController {

     @MotanReferer(basicReferer = "motantestClientBasicConfig", group = "testgroup", directUrl = "127.0.0.1:8002")
     MotanDemoService service;

     @RequestMapping("/")
     @ResponseBody
     public String home() {
         String result = service.hello("test");
         return result;
     }
 }

4、使用spring-boot启动client

 @EnableAutoConfiguration
 @SpringBootApplication
 public class SpringBootRpcClientDemo {

     public static void main(String[] args) {
         SpringApplication.run(SpringBootRpcClientDemo.class, args);
     }
 }

client端详细配置请参考motan-demo模块

使用OpenTracing

Motan通过filter的SPI扩展机制支持OpenTracing,可以支持任何实现了OpenTracing标准的trace实现。使用OpenTracing需要以下步骤。

1、引入filter-opentracing扩展

 <dependency>
     <groupId>com.weibo</groupId>
     <artifactId>filter-opentracing</artifactId>
     <version>RELEASE</version>
 </dependency>

2、如果第三方trace工具声明了io.opentracing.Tracer的SPI扩展,直接引入第三方trace的jar包即可。如果第三方没有声明,则转第三步。

3、自定义一个TracerFactory实现TracerFactory接口,通过getTracer()来获取不同tracer实现。设置OpenTracingContext的tracerFactory为自定义的TracerFactory即可。

可参考filter-opentracing模块src/test/java/com.weibo.api.motan.filter.opentracing.zipkin.demo包下的server端和client端实现。

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