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Editor to share with you how springboot uses dubbo and zookeeper. I hope you will get something after reading this article. Let's discuss it together.

Create a service interface module

The interface project provides only interfaces, not implementations, and is used in later providers and consumers.

Only the specific implementation class needs to be written in the module that uses the interface, which avoids repeatedly writing the interface in each module.

Introduce dependency packages into the interface

Org.projectlombok lombok true

To create an entity class, be sure to implement the Serializable interface, otherwise it cannot be transferred between dubbo protocols

@ Data@AllArgsConstructorpublic class User implements Serializable {private String name;}

Create an interface

Public interface UserService {List getAll (); List getAll2 ();}

Create a service provider

Introduce dependency

Com.yls common-api 1.0-SNAPSHOT org.springframework.boot spring-boot-starter com.alibaba.boot dubbo-spring-boot-starter 0.2.0

Modify the configuration file

# Service name dubbo.application.name=provider1# registry address dubbo.registry.address=39.97.234.52:2181,39.97.234.52:2182,39.97.234.52:2183# registry type dubbo.registry.protocol=zookeeper# version number dubbo.application.version=3# Dubbo Protocol# protocol name dubbo.protocol.name=dubbo# service exposed port dubbo.protocol.port=20880

Implement the service interface

/ / exposure service / / the @ Service here is provided by Dubbo and is not required in spring @ Service (version = "${dubbo.application.version}") @ Componentpublic class UserImpl implements UserService {@ Override public List getAll () {User user1 = new User ("Zhang San"); User user2 = new User ("lisi"); List list = Arrays.asList (user1, user2); return list;}}

Start the service

/ / @ EnableDubbo is equivalent to configuring the package where the dubbo.scan.base-packages// scanning implementation class is located in the configuration file, registering Bean@EnableDubbo@SpringBootApplicationpublic class ProviderApplication {public static void main (String [] args) {SpringApplication.run (ProviderApplication.class,args);}}

Create consumers

Introduce dependency

Org.springframework.boot spring-boot-starter-web com.alibaba.boot dubbo-spring-boot-starter 0.2.0 com.yls common-api 1.0-SNAPSHOT

Modify the configuration file

# registry dubbo.registry.address=39.97.234.52:2181,39.97.234.52:2182,39.97.234.52:2183dubbo.registry.protocol=zookeeper#dubbo application name dubbo.application.name=consumer1

Implement the consumption interface

/ / the Service of the service consumer is @ Servicepublic class OrderImpl implements OrderService of spring {/ / access the remote service using @ Reference provided by dubbo / / version @ Reference (version = "3") private UserService userService; @ Override public List init () {List list = userService.getAll (); list.forEach (item-> System.out.println (item.getName ()); return list;}}) of the corresponding service provider.

Create controller

Controllerpublic class OrderController {@ Autowired private OrderService orderService; @ ResponseBody @ RequestMapping ("/ init") public List init () {return orderService.init ();}}

Start the service consumer

@ EnableDubbo@SpringBootApplicationpublic class ConsumerApplication {public static void main (String [] args) {SpringApplication.run (ConsumerApplication.class, args);}}

Dubbo related supplement

Dubbo uses local caching. If the registry is down, dubbo can work normally. Even if there is no registry, dubbo can communicate directly through dubbo.

/ / use @ Reference provided by dubbo to access the remote service / / version corresponding service provider's version / / url: if there is no registration center, you can configure the dubbo protocol port of the service provider through url to connect directly to @ Reference (version = "3", url = "127.0.0.1 version 20880") private UserService userService

After reading this article, I believe you have a certain understanding of "how springboot uses dubbo and zookeeper". If you want to know more about it, you are welcome to follow the industry information channel. Thank you for reading!

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