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小编这次要给大家分享的是详解Spring http服务远程调用实现过程,文章内容丰富,感兴趣的小伙伴可以来了解一下,希望大家阅读完这篇文章之后能够有所收获。
最近公司有个新的需求,写了一个接口,想要把服务暴露出去,但是这个服务所在的进程是非web项目,(可以理解成schedule/batch等进程项目),所以没有tomcat等容器,而且只有这一个服务,无论是加dubbo服务还是加tomcat等容器都显得复杂了。那么应该如何将服务暴露出去?
经过网上搜索后,最终解决问题,记录在此。
为了快速搭建,使用springboot来搭建项目:
项目结构如图:
首先需要创建一个接口,服务的提供者和服务的调用方都依赖这个模块。
package com.xiazhi.spring.service.api; import com.sun.istack.internal.NotNull; import com.sun.istack.internal.Nullable; /** * @author 赵帅 * @date 2020/6/8 */ public interface IUserService { /** * 获取姓名 * @return 姓名 */ String getName(); /** * 根据姓名获取年龄 * @param name 姓名 * @return 年龄 */ @NotNull Integer getAge(@Nullable String name); }
然后在service模块中,实现接口作为服务的提供方,需要依赖的jar包有:
<dependencies> <dependency> <groupId>com.xiazhi</groupId> <artifactId>spring-service-api</artifactId> <version>${project.version}</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <exclusions> <exclusion> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> </dependency> </dependencies>
配置文件需要加上:
spring.main.web-application-type=none
实现接口:
package com.xiazhi.spring.service.impl; import com.sun.istack.internal.NotNull; import com.sun.istack.internal.Nullable; import com.xiazhi.spring.service.api.IUserService; import org.springframework.stereotype.Service; /** * @author 赵帅 * @date 2020/6/8 */ @Service public class UserServiceImpl implements IUserService { @Override public String getName() { return "张一"; } @Override @NotNull public Integer getAge(@Nullable String name) { if ("".equals(name)) { return 10; } return 18; } }
暴露服务:
package com.xiazhi.spring.service.config; import com.sun.net.httpserver.HttpHandler; import com.xiazhi.spring.service.api.IUserService; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.core.task.TaskExecutor; import org.springframework.remoting.httpinvoker.SimpleHttpInvokerServiceExporter; import org.springframework.remoting.support.SimpleHttpServerFactoryBean; import java.util.HashMap; import java.util.Map; /** * @author 赵帅 * @date 2020/6/8 */ @Configuration public class HttpInvokerConfiguration { private final IUserService userService; private final TaskExecutor taskExecutor; public HttpInvokerConfiguration(IUserService userService, TaskExecutor taskExecutor) { this.userService = userService; this.taskExecutor = taskExecutor; } /** * 将IUserService服务暴露出去 */ @Bean public SimpleHttpInvokerServiceExporter serviceExporter() { SimpleHttpInvokerServiceExporter exporter = new SimpleHttpInvokerServiceExporter(); exporter.setService(userService); exporter.setServiceInterface(IUserService.class); return exporter; } /** * 为暴露的服务启用http服务 * @return httpServer工厂类 */ @Bean public SimpleHttpServerFactoryBean serverFactoryBean() { SimpleHttpServerFactoryBean factoryBean = new SimpleHttpServerFactoryBean(); Map<String, HttpHandler> map = new HashMap<>(2); factoryBean.setContexts(map); factoryBean.setPort(9999); factoryBean.setExecutor(taskExecutor); return factoryBean; } }
启动服务。
然后是服务的调用方,依赖有:
<dependencies> <dependency> <groupId>com.xiazhi</groupId> <artifactId>spring-service-api</artifactId> <version>${project.version}</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> </dependencies>
配置文件:
package com.xiazhi.spring.config; import com.xiazhi.spring.service.api.IUserService; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean; /** * @author 赵帅 * @date 2020/6/8 */ @Configuration public class HttpServiceConfiguration { /** * 使用http代理工厂调用服务 * @return http代理工厂创建代理对象 */ @Bean public HttpInvokerProxyFactoryBean httpInvokerProxyFactoryBean() { HttpInvokerProxyFactoryBean factoryBean = new HttpInvokerProxyFactoryBean(); factoryBean.setServiceUrl("http://localhost:9999/userService"); factoryBean.setServiceInterface(IUserService.class); return factoryBean; } }
使用接口,调用方法:
package com.xiazhi.spring.controller; import com.xiazhi.spring.service.api.IUserService; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController; /** * @author 赵帅 * @date 2020/6/8 */ @RestController public class UserController { private final IUserService userService; public UserController(IUserService userService) { this.userService = userService; } @GetMapping("/test") public String test() { String name = userService.getName(); Integer age = userService.getAge(null); System.out.println(String.format("姓名:[%s],age:[%s]", name, age)); return name; } }
运行,调用test路径测试调用结果。
项目完整结构:
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