SpringBoot Dubbo

SpringBoot给开发减少了很多的XML配置，现在用在Dubbo上.

SpringBoot版本: 2.2.2.RELEASE
DUBBO版本:2.6.2
DUBBO starter: 0.2.0

依赖

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

配置

properties配置

dubbo.scan.basePackages=com.example.demo.dubbopublish
dubbo.application.id=com-example-admin
dubbo.application.name=com-example-admin-x
dubbo.protocol.id=dubbo
dubbo.protocol.name=dubbo
dubbo.registry.id=zookeeper
dubbo.registry.address=zookeeper://domain:30002|zookeeper://domain:30002|zookeeper://domain:30002

服务暴露

import com.alibaba.dubbo.config.annotation.Service;
/**
 * version:dubbo版本
 * timeout:超时，会被Spring Context引用，不需要再写@Component或者Spring#@Service
 */
@Slf4j
@Service(version = "0.0.1", timeout = 2000)
public class QueryServiceImpl implements QueryService {
    //xxxxxx 实现方法
}

服务引用

一处引用

import com.alibaba.dubbo.config.annotation.Reference;
....
@Reference(version = "1.0.0",timeout = 3000,init = true,lazy = true)
private TestService testService;

多处引用

设置服务引用

@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.FIELD})
@Reference(version = "${dubbo.application.version}", timeout = 10_000, check = false)
public @interface DubboV1 {
}

用法

@Service
@Slf4j
public class MessageConsumerService implements EnvironmentAware, InitializingBean {
    private final static String durationStart = "durationStart";
    private final static String durationEnd = "durationEnd";
    @DubboV1
    private MessageService messageService;   
}

总结

代码即注释的最佳使用方式，从根本上丢掉了XML，但是却变的更加易读和维护了.

======2021-08-06更新
今天在本地启动了一个dubbo服务用来看一下dubbo线程模型的源代码，然后发现死活不能注册dubbo，最后发现是我的Dubbo配置从application.properties挪到了另外一个依赖的resource目录去了，结果导致Dubbo识别不到配置了，不知道这个算不算一个Bug :)