dubbo-dubbo-2.7.3.rar

# Apache Dubbo Project [](https://travis-ci.org/apache/dubbo) [](https://codecov.io/gh/apache/dubbo)   [](http://isitmaintained.com/project/apache/dubbo "Average time to resolve an issue") [](http://isitmaintained.com/project/apache/dubbo "Percentage of issues still open") [](https://twitter.com/intent/tweet?text=Apache%20Dubbo%20is%20a%20high-performance%2C%20java%20based%2C%20open%20source%20RPC%20framework.&url=http://dubbo.apache.org/&via=ApacheDubbo&hashtags=rpc,java,dubbo,micro-service) [](https://twitter.com/intent/follow?screen_name=ApacheDubbo) [](https://gitter.im/alibaba/dubbo?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge) Apache Dubbo is a high-performance, Java based open source RPC framework. Please visit [official site](http://dubbo.apache.org) for quick start and documentations, as well as [Wiki](https://github.com/apache/dubbo/wiki) for news, FAQ, and release notes. We are now collecting dubbo user info in order to help us to improve Dubbo better, pls. kindly help us by providing yours on [issue#1012: Wanted: who's using dubbo](https://github.com/apache/dubbo/issues/1012), thanks :) ## Architecture  ## Features * Transparent interface based RPC * Intelligent load balancing * Automatic service registration and discovery * High extensibility * Runtime traffic routing * Visualized service governance ## Getting started The following code snippet comes from [Dubbo Samples](https://github.com/apache/dubbo-samples/tree/master/dubbo-samples-api). You may clone the sample project and step into `dubbo-samples-api` sub directory before read on. ```bash # git clone https://github.com/apache/dubbo-samples.git # cd dubbo-samples/dubbo-samples-api ``` There's a [README](https://github.com/apache/dubbo-samples/tree/master/dubbo-samples-api/README.md) file under `dubbo-samples-api` directory. Read it and try this sample out by following the instructions. ### Maven dependency ```xml <properties> <dubbo.version>2.7.2</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 ```java package org.apache.dubbo.samples.api; public interface GreetingService { String sayHello(String name); } ``` *See [api/GreetingService.java](https://github.com/apache/dubbo-samples/blob/master/dubbo-samples-api/src/main/java/org/apache/dubbo/samples/api/GreetingsService.java) on GitHub.* ### Implement service interface for the provider ```java package org.apache.dubbo.samples.provider; import org.apache.dubbo.samples.api.GreetingService; public class GreetingServiceImpl implements GreetingService { @Override public String sayHello(String name) { return "Hello " + name; } } ``` *See [provider/GreetingServiceImpl.java](https://github.com/apache/dubbo-samples/blob/master/dubbo-samples-api/src/main/java/org/apache/dubbo/samples/server/GreetingsServiceImpl.java) on GitHub.* ### Start service provider ```java package org.apache.dubbo.demo.provider; import org.apache.dubbo.config.ApplicationConfig; import org.apache.dubbo.config.RegistryConfig; import org.apache.dubbo.config.ServiceConfig; import org.apache.dubbo.samples.api.GreetingService; import java.io.IOException; public class Application { public static void main(String[] args) throws IOException { ServiceConfig<GreetingService> serviceConfig = new ServiceConfig<GreetingService>(); serviceConfig.setApplication(new ApplicationConfig("first-dubbo-provider")); serviceConfig.setRegistry(new RegistryConfig("multicast://224.5.6.7:1234")); serviceConfig.setInterface(GreetingService.class); serviceConfig.setRef(new GreetingServiceImpl()); serviceConfig.export(); System.in.read(); } } ``` *See [provider/Application.java](https://github.com/apache/dubbo-samples/blob/master/dubbo-samples-api/src/main/java/org/apache/dubbo/samples/server/Application.java) on GitHub.* ### Build and run the provider ```bash # mvn clean package # mvn -Djava.net.preferIPv4Stack=true -Dexec.mainClass=org.apache.dubbo.demo.provider.ProviderApplication exec:java ``` ### Call remote service in consumer ```java package org.apache.dubbo.demo.consumer; import org.apache.dubbo.config.ApplicationConfig; import org.apache.dubbo.config.ReferenceConfig; import org.apache.dubbo.config.RegistryConfig; import org.apache.dubbo.samples.api.GreetingService; public class Application { public static void main(String[] args) { ReferenceConfig<GreetingService> referenceConfig = new ReferenceConfig<GreetingService>(); referenceConfig.setApplication(new ApplicationConfig("first-dubbo-consumer")); referenceConfig.setRegistry(new RegistryConfig("multicast://224.5.6.7:1234")); referenceConfig.setInterface(GreetingService.class); GreetingService greetingService = referenceConfig.get(); System.out.println(greetingService.sayHello("world")); } } ``` ### Build and run the consumer ```bash # mvn clean package # mvn -Djava.net.preferIPv4Stack=true -Dexec.mainClass=org.apache.dubbo.demo.consumer.ConsumerApplication exec:java ``` The consumer will print out `Hello world` on the screen. *See [consumer/Application.java](https://github.com/apache/dubbo-samples/blob/master/dubbo-samples-api/src/main/java/org/apache/dubbo/samples/client/Application.java) on GitHub.* ### Next steps * [Your first Dubbo application](http://dubbo.apache.org/en-us/blog/dubbo-101.html) - A 101 tutorial to reveal more details, with the same code above. * [Dubbo user manual](http://dubbo.apache.org/en-us/docs/user/preface/background.html) - How to use Dubbo and all its features. * [Dubbo developer guide](http://dubbo.apache.org/en-us/docs/dev/build.html) - How to involve in Dubbo development. * [Dubbo admin manual](http://dubbo.apache.org/en-us/docs/admin/install/provider-demo.html) - How to admin and manage Dubbo services. ## Building If you want to try out the cutting-edge features, you can built with the following commands. (Java 1.8 is required to build the master branch) ``` mvn clean install ``` ## Contact * Mailing list: * dev list: for dev/user discussion. [subscribe](mailto:dev-subscribe@dubbo.apache.org), [unsubscribe](mailto:dev-unsubscribe@dubbo.apache.org), [archive](https://lists.apache.org/list.html?dev@dubbo.apache.org), [guide](https://github.com/apache/dubbo/wiki/Mailing-list-subscription-guide) * Bugs: [Issues](https://github.com/apache/dubbo/issues/new?template=dubbo-issue-report-template.md) * Gitter: [Gitter channel](https://gitter.im/alibaba/dubbo) * Twitter: [@ApacheDubbo](https://twitter.com/ApacheDubbo) ## Contributing See [CONTRIBUTING](https://github.com/apache/dubbo/blob/master/CONTRIBUTING.md) for details on submitting patches and the contribution workflow. ### How can I contribute? * Take a look at issues with tag called