Architecture

Features

Getting started

# git clone https://github.com/apache/dubbo-samples.git# cd dubbo-samples/dubbo-samples-api

Maven dependency

<properties>    <dubbo.version>2.7.10</dubbo.version></properties><dependencies>    <dependency>        <groupId>org.apache.dubbo</groupId>        <artifactId>dubbo</artifactId>        <version>${dubbo.version}</version>    </dependency>    <dependency>        <groupId>org.apache.dubbo</groupId>        <artifactId>dubbo-dependencies-zookeeper</artifactId>        <version>${dubbo.version}</version>        <type>pom</type>    </dependency></dependencies>

Define service interfaces

packageorg.apache.dubbo.samples.api;publicinterfaceGreetingsService {StringsayHi(Stringname);}

Implement service interface for the provider

packageorg.apache.dubbo.samples.provider;importorg.apache.dubbo.samples.api.GreetingsService;publicclassGreetingsServiceImplimplementsGreetingsService {@OverridepublicStringsayHi(Stringname) {return"hi, " +name;    }}

Start service provider

packageorg.apache.dubbo.samples.provider;importorg.apache.dubbo.config.ApplicationConfig;importorg.apache.dubbo.config.RegistryConfig;importorg.apache.dubbo.config.ServiceConfig;importorg.apache.dubbo.samples.api.GreetingsService;importjava.util.concurrent.CountDownLatch;publicclassApplication {privatestaticStringzookeeperHost =System.getProperty("zookeeper.address","127.0.0.1");publicstaticvoidmain(String[]args)throwsException {ServiceConfig<GreetingsService>service =newServiceConfig<>();service.setApplication(newApplicationConfig("first-dubbo-provider"));service.setRegistry(newRegistryConfig("zookeeper://" +zookeeperHost +":2181"));service.setInterface(GreetingsService.class);service.setRef(newGreetingsServiceImpl());service.export();System.out.println("dubbo service started");newCountDownLatch(1).await();    }}

Build and run the provider

# mvn clean package# mvn -Djava.net.preferIPv4Stack=true -Dexec.mainClass=org.apache.dubbo.samples.provider.Application exec:java

Call remote service in the consumer

packageorg.apache.dubbo.samples.client;importorg.apache.dubbo.config.ApplicationConfig;importorg.apache.dubbo.config.ReferenceConfig;importorg.apache.dubbo.config.RegistryConfig;importorg.apache.dubbo.samples.api.GreetingsService;publicclassApplication {privatestaticStringzookeeperHost =System.getProperty("zookeeper.address","127.0.0.1");publicstaticvoidmain(String[]args) {ReferenceConfig<GreetingsService>reference =newReferenceConfig<>();reference.setApplication(newApplicationConfig("first-dubbo-consumer"));reference.setRegistry(newRegistryConfig("zookeeper://" +zookeeperHost +":2181"));reference.setInterface(GreetingsService.class);GreetingsServiceservice =reference.get();Stringmessage =service.sayHi("dubbo");System.out.println(message);    }}

Build and run the consumer

# mvn clean package# mvn -Djava.net.preferIPv4Stack=true -Dexec.mainClass=org.apache.dubbo.samples.client.Application exec:java

Next steps

Building

  mvn clean install

Contact

Contributing

How can I contribute?

Reporting bugs

Reporting a security vulnerability

Dubbo ecosystem

Language

License