这篇文章主要介绍了SpringBoot with Apache Dubbo工程的示例分析,具有一定借鉴价值,感兴趣的朋友可以参考下,希望大家阅读完这篇文章之后大有收获,下面让小编带着大家一起了解一下。
该工程示例使用最新的Dubbo版本,Dubbo Starter以及SpringBoot版本,通过Gradle
进行工程管理和构建,输出可执行程序。
Dubbo
版本org.apache.dubbo:dubbo:2.7.1
org.apache.dubbo:dubbo-spring-boot-starter:2.7.1
SpringBoot
版本org.springframework.boot:spring-boot-dependencies:2.1.1.RELEASE
根工程(dubbo-case
),仅用来定义构建任务,工程信息
子工程(dubbo-api
) ,定义RPC服务的接口,参数和响应结果的数据传输对象
子工程(dubbo-client
), RPC服务的消费端,实际开发过程中实际情况是一些服务调用其它服务的RPC服务
子工程(dubbo-server
),RPC服务的提供端
代码仓库:https://github.com/broncho/dubbo-case
项目目录结构
备注:script目录归档执行脚本模版信息
public interface HelloService {
String sayHello(String name);
}
接口实现
import com.github.broncho.dubbo.api.HelloService;
import org.apache.dubbo.config.annotation.Service;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
/**
* Author: secondriver
* Created: 2019/8/4
*/
@Service
public class HelloServiceImpl implements HelloService {
@Override
public String sayHello(String name) {
return "Welcome " + name + " at " + LocalDateTime.now().format(DateTimeFormatter.ISO_LOCAL_DATE_TIME);
}
}
备注:@Service注解是由Dubbo框架提供的
启动类
@SpringBootApplication
public class DubboServerApplication {
public static void main(String[] args) {
new EmbeddedZooKeeper(2181, true).start();
SpringApplication.run(DubboServerApplication.class, args);
}
}
备注:此处使用嵌入式Zookeeper,实现详情参见源码;或者可以直接采用独立Zookeeper服务
配置文件application.properties
# 应用名称
dubbo.application.name=dubbo-app1
dubbo.application.qosEnable=true
dubbo.application.qosPort= 22222
dubbo.application.qosAcceptForeignIp=true
# 接口实现者(服务实现)包
dubbo.scan.base-packages=com.github.broncho.dubbo.server.impl
# 注册中心信息
dubbo.registry.id=my-zk
dubbo.registry.address=localhost:2181
dubbo.registry.protocol=zookeeper
dubbo.registry.client=curator
关于Dubbo
的配置参见:https://dubbo.apache.org/zh-cn/docs/user/references/api.html
服务消费示例
@Component
public class BusinessComponent {
@Reference
private HelloService helloService;
public void greeting(String name) {
System.out.println(helloService.sayHello(name));
}
}
启动类
@SpringBootApplication
public class DubboClientApplication {
public static void main(String[] args) {
ConfigurableApplicationContext context = SpringApplication.run(DubboClientApplication.class, args);
BusinessComponent component = context.getBean(BusinessComponent.class);
//RPC
component.greeting("Dubbo RPC");
}
}
配置文件(application.properties
)
# 应用程序名
dubbo.application.name=dubbo-app2
# 注册中心信息
dubbo.registry.id=my-zk
dubbo.registry.address=localhost:2181
dubbo.registry.protocol=zookeeper
dubbo.registry.client=curator
gradle.properties
systemProp.activeProfile=dev
systemProp.javaVersion=1.8
build.gradle
import org.springframework.boot.gradle.plugin.SpringBootPlugin
buildscript {
repositories {
mavenLocal()
maven {
name "alimaven"
url "http://maven.aliyun.com/nexus/content/groups/public/"
}
mavenCentral()
}
}
plugins {
id 'java'
id 'idea'
id 'org.springframework.boot' version '2.1.1.RELEASE' apply false
id 'io.spring.dependency-management' version '1.0.8.RELEASE' apply false
}
//所有工程定义
allprojects {
sourceCompatibility = System.properties["javaVersion"]
targetCompatibility = System.properties["javaVersion"]
repositories {
mavenLocal()
maven {
name "alimaven"
url "http://maven.aliyun.com/nexus/content/groups/public/"
}
mavenCentral()
}
group 'com.github.broncho'
version '1.0.0'
}
//子工程定义
subprojects {
apply plugin: 'java'
apply plugin: 'io.spring.dependency-management'
apply plugin: 'distribution'
if (!name.contains("api")) {
apply plugin: 'org.springframework.boot'
apply plugin: 'application'
}
dependencyManagement {
imports {
mavenBom(SpringBootPlugin.BOM_COORDINATES)
}
dependencies {
dependencySet(group: 'org.apache.dubbo', version: '2.7.1') {
entry 'dubbo'
entry 'dubbo-spring-boot-starter'
}
}
dependencies {
dependencySet(group: 'org.apache.curator', version: '4.0.0') {
entry 'curator-framework'
entry 'curator-recipes'
}
}
dependencies {
dependency 'org.apache.zookeeper:zookeeper:3.5.5'
}
}
if (!project.name.contains("api")) {
println "Project ${name} activeProfile ${System.properties['activeProfile']}"
jar {
enabled true
}
applicationDefaultJvmArgs = ['-Xms256m', '-Xmx256m']
/**
* 生成启动脚本
*/
startScripts() {
doFirst {
unixStartScriptGenerator.template = resources.text.fromFile(
project.getRootDir().getAbsolutePath() + "/script/unixStartScript.txt"
)
windowsStartScriptGenerator.template = resources.text.fromFile(
project.getRootDir().getAbsolutePath() + "/script/windowsStartScript.txt"
)
}
}
/**
* 开发环境下不能排除配置文件,不然没法通过IDE运行项目
*/
if (!"dev".equals(System.properties['activeProfile'])) {
proce***esources {
exclude 'application*.properties'
}
}
/**
* application*.properties统一复制到config目录
* SpringBoot程序启动时从config目录读取配置文件
*/
applicationDistribution.from("src/main/resources") {
include 'application*.properties'
into 'config'
}
}
}
项目采用了Spring Boot Gradle Plugin和dependency-management结合起来进行SpringBoot版本管理以及子工程中依赖的统一管理。
gradle -DactiveProfile=prod clean distZip
基于SpringBoot的dubbo-server
和dubbo-client
工程会输出发布包到各自工程目录的build/distributions
目录。
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