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.
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- Transparent interface based RPC
- Intelligent load balancing
- Automatic service registration and discovery
- High extensibility
- Runtime traffic routing
- Visualized service governance
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 https://github.com/apache/dubbo-samples.git
cd dubbo-samples/1-basic/dubbo-samples-apiThere's a README file under dubbo-samples-api directory. We recommend referencing the samples in that directory by following the below-mentioned instructions:
<properties>
<dubbo.version>3.2.13-SNAPSHOT</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>package org.apache.dubbo.samples.api;
public interface GreetingsService {
String sayHi(String name);
}See api/GreetingsService.java on GitHub.
package org.apache.dubbo.samples.provider;
import org.apache.dubbo.samples.api.GreetingsService;
public class GreetingsServiceImpl implements GreetingsService {
@Override
public String sayHi(String name) {
return "hi, " + name;
}
}See provider/GreetingsServiceImpl.java on GitHub.
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", "127.0.0.1");
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.setInterface(GreetingsService.class);
service.setRef(new GreetingsServiceImpl());
service.export();
System.out.println("dubbo service started");
new CountDownLatch(1).await();
}
}See provider/Application.java on GitHub.