dubbo项目开发实战

标签：health   load   zookeeper   conf   --   turn   mem   依赖   很多   

1：创建空的maven项目，引入依赖：

    <!--dubbo-->
    <dependency>
        <groupId>com.alibaba.boot</groupId>
        <artifactId>dubbo-spring-boot-starter</artifactId>
        <version>0.2.0</version>
    </dependency>

2：使用properties配置

app.service.version=1.0.0
\# Base packages to scan Dubbo Component: @com.alibaba.dubbo.config.annotation.Service
dubbo.scan.basePackages=com.seasfood.producer.
\# Dubbo Config properties
\## ApplicationConfig Bean
dubbo.application.id=seasfood-dubbo-id
dubbo.application.name=seasfood-dubbo-name
dubbo.application.qos.port=22222
dubbo.application.qos.enable=true
\## ProtocolConfig Bean
dubbo.protocol.id=dubbo-id
\#只能是dubbo，这个是协议名
dubbo.protocol.name=dubbo
dubbo.protocol.port=9090
dubbo.protocol.status=server
\## RegistryConfig Bean
dubbo.registry.id=zookeeper
dubbo.registry.address=zookeeper://zk-cs:2181
\# Enables Dubbo All Endpoints
management.endpoint.dubbo.enabled=true
management.endpoint.dubbo-shutdown.enabled=true
management.endpoint.dubbo-configs.enabled=true
management.endpoint.dubbo-services.enabled=true
management.endpoint.dubbo-references.enabled=true
management.endpoint.dubbo-properties.enabled=true
\# Dubbo Health
\## StatusChecker Name defaults (default : "memory", "load" )
management.health.dubbo.status.defaults=memory
\## StatusChecker Name extras (default : empty )
management.health.dubbo.status.extras=load,threadpool

3：声明一个服务接口，声明一个实现类实现接口，然后在实现类上注解

public interface MyInterface{}

@Service(
                version = "${app.service.version}",
                application = "${dubbo.application.id}",
                protocol = "${dubbo.protocol.id}",
                registry = "${dubbo.registry.id}"
)
public class MyService implements MyIneterface {}

4：如果接口中需要传输DTO类型的，需要给类型实现序列化接口Serializable，否则在rpc调用会报错

5：消费者只需要注入使用即可

     @Reference(version = "${app.service.version}",
                        lazy = true,
                        application = "${dubbo.application.id}",
                        registry = "${dubbo.registry.id}"
        )
        private MyInterface myInterface;

6：配置：有很多配置，目前我这用到的，一个是均衡负载配置，一个是服务降级配置，一个是集群容错（重试）br/>负载均衡配置在服务端和客户端都可以配置，配置loadbalance属性即可，缺省为random，可以配置roundrobin
集群容错配置retries属性，
服务降级配置：在@Reference里配置mock属性
mock=fail:return+null：当调用失败的时候返回null值

dubbo项目开发实战

标签：health   load   zookeeper   conf   --   turn   mem   依赖   很多   

原文地址：https://blog.51cto.com/13860853/2362599