系統結構
系統方案
1.eurake服務中心的實現---略
2.python服務的特殊實現
python服務需要特別實現一個health的方法，並且返回指定的json格式如下
{
"status":"UP"
}
3.基於sidecar的代理程序實現
- pom文件的引用配置
-
<properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> <maven.compiler.source>8</maven.compiler.source> <maven.compiler.target>8</maven.compiler.target> <spring-boot.version>2.1.5.RELEASE</spring-boot.version> <spring-cloud.version>Greenwich.RELEASE</spring-cloud.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-netflix-sidecar --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-netflix-sidecar</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <dependencyManagement> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-dependencies</artifactId> <version>${spring-boot.version}</version> <scope>import</scope> <type>pom</type> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-dependencies --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> - application.properties文件配置
-
server.port=端口號 #配置Tomcat編碼，默認爲UTF-8 server.tomcat.uri-encoding=UTF-8 spring.application.name=程序名 #python的webapi的端口 sidecar.port=python服務的端口 #python的webapi的hostname sidecar.hostname=ip地址 #python的webapi的ip,多網卡的服務器需要指明ip sidecar.ip-address=ip地址 sidecar.health-uri=http://ip地址:${sidecar.port}/health # 啓動服務註冊 eureka.client.register-with-eureka = true #啓動服務發現 eureka.client.fetch-registry = true eureka.client.service-url.defaultZone = http://註冊服務中心地址/eureka/ hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds=10000 ribbon.ConnectTimeout=5000 ribbon.ReadTimeout=5000 - 入口程序類如下
-
import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.cloud.netflix.sidecar.EnableSidecar; @EnableSidecar @SpringBootApplication public class Application { public static void main(String[] args) { SpringApplication.run(Application.class, args); } }
4.調用python服務的java程序的實現
- pom引用
-
<parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.8.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> ......................省略常見配置 <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-openfeign</artifactId> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <dependencyManagement> <dependencies> <!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-dependencies --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>Greenwich.RELEASE</version> <type>pom</type> <scope>import</scope> </dependency> </dependencies> </dependencyManagement> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> - application.properties的配置
-
server.port=端口 #配置Tomcat編碼，默認爲UTF-8 server.tomcat.uri-encoding=UTF-8 # 啓動服務註冊 eureka.client.register-with-eureka = false #啓動服務發現 eureka.client.fetch-registry = true eureka.client.service-url.defaultZone = http://註冊中心地址/eureka/ ribbon.okhttp.enabled=true ribbon.restclient.enabled=true - 標準fegin格式接口實現
-
import org.springframework.cloud.openfeign.FeignClient; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; @FeignClient(value ="sidecar代理程序在配置文件中spring.application.name屬性的值") public interface 接口名{ /** * RequestMapping中的路徑需要是端口後的路徑 * @return */ @RequestMapping(value = "/路徑/方法名/",method = {RequestMethod.POST}) String 方法名【最好和Python一致，便於管理】(); } - 服務調用，正常的fegin接口調用
-
@Autowired private 接口名 service;
系統啓動
- 啓動python服務
- 啓動sidecar程序【前提eureka服務中心已經在運行】
- 啓動調用服務的java程序
注意
python的webapi請求格式
http://域名/路徑/方法名/
需要以/結尾，如果沒有/的話python的框架會發出http的308狀態，自動跳轉，對於java的fegin客戶端來說這是不可接受的，所以在編寫feginclient接口的方法時，一定注意要以/結尾設置RequestMapping的value值。
java的webapi請求格式
http://域名/路徑/方法名
是沒有/結尾的，如果按照java的習慣設置python服務的feginclient接口裏RequestMapping的value值會引起問題。