Apache Dubbo Project

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    Apache Dubbo is a high-performance, Java-based open-source RPC framework. Please visit the official site for the quick start guide and documentation, as well as the wiki for news, FAQ, and release notes.

    We are now collecting Dubbo user info to help us to improve Dubbo further. Kindly support us by providing your usage information on issue#1012: Wanted: who's using dubbo, thanks :)




    • 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. You may clone the sample project and step into the dubbo-samples-api subdirectory before proceeding.

    # git clone
    # cd dubbo-samples/dubbo-samples-api

    There's a README file under dubbo-samples-api directory. We recommend referencing the samples in that directory by following the below-mentioned instructions:

    Maven dependency


    Define service interfaces

    package org.apache.dubbo.samples.api;
    public interface GreetingsService {
        String sayHi(String name);

    See api/ on GitHub.

    Implement service interface for the provider

    package org.apache.dubbo.samples.provider;
    import org.apache.dubbo.samples.api.GreetingsService;
    public class GreetingsServiceImpl implements GreetingsService {
        public String sayHi(String name) {
            return "hi, " + name;

    See provider/ on GitHub.

    Start service provider

    package org.apache.dubbo.samples.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.GreetingsService;
    import java.util.concurrent.CountDownLatch;
    public class Application {
        private static String zookeeperHost = System.getProperty("zookeeper.address", "");
        public static void main(String[] args) throws Exception {
            ServiceConfig<GreetingsService> service = new ServiceConfig<>();
            service.setApplication(new ApplicationConfig("first-dubbo-provider"));
            service.setRegistry(new RegistryConfig("zookeeper://" + zookeeperHost + ":2181"));
            service.setRef(new GreetingsServiceImpl());
            System.out.println("dubbo service started");
            new CountDownLatch(1).await();

    See provider/ on GitHub.

    Build and run the provider

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

    Call remote service in the consumer

    package org.apache.dubbo.samples.client;
    import org.apache.dubbo.config.ApplicationConfig;
    import org.apache.dubbo.config.ReferenceConfig;
    import org.apache.dubbo.config.RegistryConfig;
    import org.apache.dubbo.samples.api.GreetingsService;
    public class Application {
        private static String zookeeperHost = System.getProperty("zookeeper.address", "");
        public static void main(String[] args) {
            ReferenceConfig<GreetingsService> reference = new ReferenceConfig<>();
            reference.setApplication(new ApplicationConfig("first-dubbo-consumer"));
            reference.setRegistry(new RegistryConfig("zookeeper://" + zookeeperHost + ":2181"));
            GreetingsService service = reference.get();
            String message = service.sayHi("dubbo");

    See consumer/ on GitHub.

    Build and run the consumer

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

    The consumer will print out hi, dubbo on the screen.

    Next steps


    If you want to try out the cutting-edge features, you can build with the following commands. (Java 1.8 is needed to build the master branch)

      mvn clean install



    See CONTRIBUTING for details on submitting patches and the contribution workflow.

    How can I contribute?

    • Take a look at issues with tags marked Good first issue or Help wanted.
    • Join the discussion on the mailing list, subscription guide.
    • Answer questions on issues.
    • Fix bugs reported on issues, and send us a pull request.
    • Review the existing pull request.
    • Improve the website, typically we need
      • blog post
      • translation on documentation
      • use cases around the integration of Dubbo in enterprise systems.
    • Improve the dubbo-admin/dubbo-monitor.
    • Contribute to the projects listed in ecosystem.
    • Other forms of contribution not explicitly enumerated above.
    • If you would like to contribute, please send an email to to let us know!

    Reporting bugs

    Please follow the template for reporting any issues.

    Reporting a security vulnerability

    Please report security vulnerabilities to us privately.

    Dubbo ecosystem



    Apache Dubbo software is licenced under the Apache License Version 2.0. See the LICENSE file for details.


    Apache Dubbo is a high-performance, java based, open source RPC framework.

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