dubbo-源码阅读之服务订阅

配置例子

<?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-4.0.xsd
                        http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">

    <dubbo:application name="soa-consumer"/>

    <dubbo:registry protocol="zookeeper" address="${zookeeper.url}"/>

    <dubbo:consumer timeout="3000" check="false"/>

    <dubbo:reference id="StudentService"

                     interface="com.liqiang.test.StudentService"/>

</beans>

DubboNamespaceHandler配置

原理参考https://www.cnblogs.com/LQBlog/p/9391229.html

public class DubboNamespaceHandler extends NamespaceHandlerSupport {
    public DubboNamespaceHandler() {
    }

    public void init() {
        this.registerBeanDefinitionParser("application", new DubboBeanDefinitionParser(ApplicationConfig.class, true));
        this.registerBeanDefinitionParser("module", new DubboBeanDefinitionParser(ModuleConfig.class, true));
        this.registerBeanDefinitionParser("registry", new DubboBeanDefinitionParser(RegistryConfig.class, true));
        this.registerBeanDefinitionParser("monitor", new DubboBeanDefinitionParser(MonitorConfig.class, true));
        this.registerBeanDefinitionParser("provider", new DubboBeanDefinitionParser(ProviderConfig.class, true));
        this.registerBeanDefinitionParser("consumer", new DubboBeanDefinitionParser(ConsumerConfig.class, true));
        this.registerBeanDefinitionParser("protocol", new DubboBeanDefinitionParser(ProtocolConfig.class, true));
        this.registerBeanDefinitionParser("service", new DubboBeanDefinitionParser(ServiceBean.class, true));
        this.registerBeanDefinitionParser("reference", new DubboBeanDefinitionParser(ReferenceBean.class, false));
        this.registerBeanDefinitionParser("annotation", new AnnotationBeanDefinitionParser());
    }

    static {
        Version.checkDuplicate(DubboNamespaceHandler.class);
    }
}

标红的部分则是解析dubbo:reference标签

    <dubbo:reference id="StudentService"
                     interface="com.liqiang.test.StudentService"/>

ReferenceBean

afterPropertiesSet

因为实现了spirng的InitializingBean接口 所以再初始化之后就会调用