Build a simple spring cloud project 2: service layer and consumption layer

LonZyuan 2021-04-16 12:22:00
build simple spring cloud project


Service layer (server)

build

It is used to operate the database directly , Provide corresponding interfaces for external users , At the same time, the service layer can also consume the interfaces provided by other service layers .

rely on :

<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-openfeign-core</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper-spring-boot-starter</artifactId>
</dependency><dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>com.github.drtrang</groupId>
<artifactId>druid-spring-boot2-starter</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</dependency>
<dependency>
<groupId>com.zy</groupId>
<artifactId>cloud-common</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>com.zy</groupId>
<artifactId>cloud-common-base</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
</dependencies>

The configuration file :

server:
port: 8082
​
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8081/eureka/
​
spring:
application:
name: cloud-server
​
main:
allow-bean-definition-overriding: true
​
datasource:
url: jdbc:mysql://127.0.0.1:3306/tktest
username: root
password: 123456
driver-class-name: com.mysql.jdbc.Driver
type: com.alibaba.druid.pool.DruidDataSource

mapper

establish UserMapper

Start class :

@EnableDiscoveryClient( Register in the registry )、@MapperScan( scanning mapper)

Test class test :

import com.zy.mapper.UserMapper;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
​
@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes = CloudServerApplication.class)
public class UserMapperTest {
​
@Autowired
private UserMapper userMapper;
​
private Long id;
​
@Before
public void randomNum() {
int max = 1000000000, min = 100000000;
id = (long) (Math.random() * max) + min;
}
​
@Test
public void insertTest() {
UserDTO userDTO = new UserDTO();
userDTO.setId(id);
userDTO.setName("inserted")
.setStatus(1);
int result = userMapper.insert(userDTO);
System.out.println(result > 0);
}
​
@Test
public void updateTest() {
insertTest();
UserDTO userDTO = new UserDTO();
userDTO.setId(id);
userDTO.setName("updated")
.setStatus(1);
int result = userMapper.updateByPrimaryKey(userDTO);
System.out.println(result > 0);
}
​
@Test
public void deleteTest() {
insertTest();
UserDTO userDTO = new UserDTO();
userDTO.setId(id);
userDTO.setName("deleted")
.setStatus(0);
int result = userMapper.updateByPrimaryKey(userDTO);
System.out.println(result > 0);
}
​
@Test
public void selectTest() {
insertTest();
UserDTO userDTO = new UserDTO();
userDTO.setId(id);
userDTO.setStatus(1);
UserDTO result = userMapper.selectOne(userDTO);
System.out.println(result);
}
​
}

service

IUserService:

UserService:

import com.zy.entity.UserDTO;
import com.zy.mapper.UserMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
​
@Service
public class UserService extends BaseService<UserMapper, UserDTO> implements IUserService {
​
@Autowired
private UserMapper userMapper;
​
public void deleteById(Long id) {
UserDTO userDTO = new UserDTO();
userDTO.setId(id);
userDTO.setStatus(0);
userMapper.updateByPrimaryKey(userDTO);
}
}

Service interface

Consumption level (consumer)

build

rely on :

<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency><dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency><dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-eureka</artifactId>
</dependency><dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency><dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-openfeign-core</artifactId>
</dependency><dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency><dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency><dependency>
<groupId>com.github.drtrang</groupId>
<artifactId>druid-spring-boot2-starter</artifactId>
</dependency><dependency>
<groupId>com.zy</groupId>
<artifactId>cloud-common</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency><dependency>
<groupId>com.zy</groupId>
<artifactId>cloud-common-base</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency><dependency>
<groupId>com.zy</groupId>
<artifactId>cloud-server</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency></dependencies>

To configure :

server:
port: 8083
​
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8081/eureka/
​
spring:
application:
name: consumer
main:
allow-bean-definition-overriding: true
​
datasource:
url: jdbc:mysql://127.0.0.1:3306/tktest
username: root
password: 123456
driver-class-name: com.mysql.jdbc.Driver
type: com.alibaba.druid.pool.DruidDataSource

Api( Consumer interface )

Api Interface :

The Api Of Hystrix The implementation of the :

I didn't do the server degradation here , Added one return In order to verify whether the call is successful

Controller

import com.zy.api.DataApi;
import com.zy.entity.UserDTO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
​
@RestController
@RequestMapping("/consumer")
public class ConsumerController {
​
@Autowired
private DataApi dataApi;
​
@PostMapping("/insert")
public String insertData(@RequestBody UserDTO userDTO){
return dataApi.insertData(userDTO);
}
​
}

Start class

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
​
@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients("com.zy.api")
public class CloudConsumerApplication {
public static void main(String[] args) {
SpringApplication.run(CloudConsumerApplication.class, args);
}
}

 

test Demo

Startup sequence :cloud-eureka-server ---> cloud-server ---> cloud-consumer

Check out the Registration Center (Eureka):

It means that both the service and the consumer have registered successfully , Then open the postman test :

call consumer Of controller

Open the database to view :

Successful addition

版权声明
本文为[LonZyuan]所创,转载请带上原文链接,感谢
https://javamana.com/2021/04/20210416115235935L.html

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