Dubbo入门01

节点角色说明

提供给消费端，也就是被调用的一方

定义接口

public interface ProviderService {

    String SayHello(String word);
}

实现接口

public class ProviderServiceImpl implements ProviderService{

    public String SayHello(String word) {
        return "hello "+word;
    }
}

maven依赖

    
        
            junit
            junit
            3.8.1
            test
        
        
        
            com.alibaba
            dubbo
            2.6.6
        
        
            org.apache.zookeeper
            zookeeper
            3.4.10
        
        
            com.101tec
            zkclient
            0.5
        
        
            io.netty
            netty-all
            4.1.32.Final
        
        
            org.apache.curator
            curator-framework
            2.8.0
        
        
            org.apache.curator
            curator-recipes
            2.8.0
        
    

暴露接口（xml 配置方法）
首先，我们在我们项目的 resource 目录下创建 meta-INF.spring 包，然后再创建 provider.xml 文件

在启动的时候如果没有log4j.properties配置会有警告，所以加上配置文件

log4j.rootLogger = info,stdout,D
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern =  %d %t [%c{2}] %L [%-5p] %m%n
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = ../logs/log.log
log4j.appender.D.Append = true
log4j.appender.D.Threshold = info
log4j.appender.D.DatePattern= '_'yyyy-MM-dd'.log'
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = %d %t [%c{2}] %L [%-5p] %m%n

启动类（xml方式启动）

public class ProviderApplication
{
    public static void main( String[] args ) throws IOException {
        //加载xml配置文件启动
        ClassPathXmlApplicationContext context =
                new ClassPathXmlApplicationContext("meta-INF/spring/provider.xml");
        context.start();
        System.in.read(); // 按任意键退出
    }
}

xml配置

PS:URL需换成服务端暴露的URL
2. maven依赖
与服务端一致
3. 启动类

public class ConsumerApplication
{
    public static void main( String[] args ) throws IOException {

        ClassPathXmlApplicationContext context=new ClassPathXmlApplicationContext("consumer.xml");
        context.start();
        ProviderService providerService = (ProviderService) context.getBean("providerService");
        String str = providerService.SayHello("world!");
        System.out.println(str);
        System.in.read();

    }
}

博文参考: https://segmentfault.com/a/1190000019896723.