Dubbo2.6.5入門——簡單的HelloWorld
阿新 • • 發佈：2019-01-18
hello provide 負載均衡算法 cli 日誌類 ice model rom pri
建立父工程
打開idea，新建一個空的maven工程，作為整個項目的父工程。
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.demo</groupId> <artifactId>dubbo-parent</artifactId> <version>1.0-SNAPSHOT</version> <modules> <module>dubbo-api</module> <module>dubbo-service</module> <module>dubbo-consumer</module> </modules> <packaging>pom</packaging> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.1.2.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <dependencies> <dependency> <groupId>com.alibaba.boot</groupId> <artifactId>dubbo-spring-boot-starter</artifactId> <version>0.2.1-SNAPSHOT</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.6.5</version> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.9.2</version> </dependency> <dependency> <groupId>org.apache.curator</groupId> <artifactId>curator-framework</artifactId> <version>2.13.0</version> </dependency> <!--<dependency>--> <!--<groupId>org.apache.curator</groupId>--> <!--<artifactId>curator-client</artifactId>--> <!--<version>2.13.0</version>--> <!--</dependency>--> <!--<dependency>--> <!--<groupId>org.apache.curator</groupId>--> <!--<artifactId>curator-recipes</artifactId>--> <!--<version>2.13.0</version>--> <!--</dependency>--> <dependency> <groupId>io.netty</groupId> <artifactId>netty-all</artifactId> </dependency> </dependencies> <repositories> <repository> <id>sonatype-nexus-snapshots</id> <url>https://oss.sonatype.org/content/repositories/snapshots</url> <releases> <enabled>false</enabled> </releases> <snapshots> <enabled>true</enabled> </snapshots> </repository> </repositories> </project>
然後建立公共模塊
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完成之後在src/main/java目錄下新建一個服務接口
內容：
package com.demo.common.service; public interface DemoService { String hello(); }
目錄：
建立dubbo服務子模塊
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這個時候呢，Springboot的父工程不是我們建立的那個，所以要改一下parent，還需要加入公共模塊的依賴
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>com.demo</groupId> <artifactId>dubbo-parent</artifactId> <version>1.0-SNAPSHOT</version> </parent> <artifactId>dubbo-service</artifactId> <version>0.0.1-SNAPSHOT</version> <name>dubbo-service</name> <description>dubbo服務</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>com.demo</groupId> <artifactId>dubbo-api</artifactId> <version>1.0-SNAPSHOT</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
下面寫一個簡單的dubbo服務，在與SpringBoot啟動類同級目錄下建立service包，裏面有服務接口的實現
..服務接口實現
package com.demo.dubboservice.service.impl; import com.alibaba.dubbo.config.annotation.Service; import com.demo.common.service.DemoService; /** * 建議由服務提供方設置超時,在 Provider 上盡量多配置 Consumer 端屬性 * timeout 方法調用超時 * retries 失敗重試次數，缺省是 2 [2] * loadbalance 負載均衡算法 [3]，缺省是隨機 random。還可以有輪詢 roundrobin、最不活躍優先 [4] leastactive 等 * actives 消費者端，最大並發調用限制，即當 Consumer 對一個服務的並發調用到上限後，新調用會阻塞直到超時 */ @Service(registry = "dubboRegistry", timeout = 3000, version = "1.0", retries = 3, loadbalance = "random", actives = 5) public class DemoServiceImpl implements DemoService { @Override public String hello() { return "動物園裏有大西幾! 小兇許! 小腦斧! 梅發怒! 小福泥! 小海疼! 發福蝶! 大雞居! 大飛囊! 大lai流! 強頸怒! 大蟒鞋! 小白去! 鴕寮! 大帶許! 大窮貓! 大諾坨! 大你魚! 丹鼎貨! 小烏堆!"; } }
..然後修改application.properties
spring.application.name=dubbo-service server.port=9999 # 應用名 dubbo.application.id=service-provider dubbo.application.name=service-provider # 掃描dubbo服務(@Service.. @Reference..) dubbo.scan.basePackages=com.demo.dubboservice.service # 通信協議 dubbo.protocol.id = dubbo dubbo.protocol.name = dubbo dubbo.protocol.port = 20880 # 註冊中心 dubbo.registry.id = dubboRegistry dubbo.registry.timeout=5000 dubbo.registry.address = 127.0.0.1:2181 dubbo.registry.client = curator dubbo.registry.protocol=zookeeper
建立服務消費者子模塊
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同樣，也需要更改parent並加入公共模塊依賴
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <parent> <groupId>com.demo</groupId> <artifactId>dubbo-parent</artifactId> <version>1.0-SNAPSHOT</version> </parent> <artifactId>dubbo-consumer</artifactId> <version>0.0.1-SNAPSHOT</version> <name>dubbo-consumer</name> <description>dubbo消費者</description> <properties> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>com.demo</groupId> <artifactId>dubbo-api</artifactId> <version>1.0-SNAPSHOT</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
在Springboot啟動類的同級目錄下建立，controller
Controller
package com.demo.dubboconsumer.controller; import com.alibaba.dubbo.config.annotation.Reference; import com.demo.common.service.DemoService; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @RestController public class DemoController { @Reference(version = "1.0") private DemoService demoService; @RequestMapping("/hello") public String hello(){ return demoService.hello(); } }
application.properties
spring.application.name=dubbo-service server.port=9990 # 應用名 dubbo.application.id=service-consumer dubbo.application.name=service-consumer # 掃描dubbo服務(@Service.. @Reference..) dubbo.scan.basePackages=com.demo.dubboconsumer.controller # 通信協議 dubbo.protocol.id = dubbo dubbo.protocol.name = dubbo dubbo.protocol.port = 20880 # 註冊中心 dubbo.registry.id = dubboRegistry dubbo.registry.timeout=5000 dubbo.registry.address = 127.0.0.1:2181 dubbo.registry.client = curator dubbo.registry.protocol=zookeeper
還有一個日誌類，這個沒有也行，我自己寫著玩的
package com.demo.dubboconsumer.utils; import lombok.extern.slf4j.Slf4j; import org.aspectj.lang.JoinPoint; import org.aspectj.lang.ProceedingJoinPoint; import org.aspectj.lang.annotation.AfterThrowing; import org.aspectj.lang.annotation.Around; import org.aspectj.lang.annotation.Aspect; import org.aspectj.lang.annotation.Pointcut; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import javax.servlet.http.HttpServletRequest; /** * AOP 日誌 */ @Aspect @Component @Slf4j public class MonitorAOP { @Autowired private HttpServletRequest request; @Pointcut("execution(* com.demo.dubboconsumer.controller..*.*(..))") public void aspect(){} @Around("aspect()") public Object around(ProceedingJoinPoint joinPoint) throws Throwable { long start = System.currentTimeMillis(); Object result = joinPoint.proceed(); long end = System.currentTimeMillis(); log.info(joinPoint + "|Time-Consuming:" + (end-start) + "|" + request.getRequestURI()); return result; } @AfterThrowing(value = "aspect()", throwing = "e") public void afterException(JoinPoint joinPoint, Exception e){ } }
首先啟動服務提供者
然後啟動消費者
然後呢，我前面寫了一個管控臺的，不清楚請看這裏，現在看 http://localhost:8080/#/。
點擊Detail
可以看到消費者信息。
下面我們訪問一下接口 http://localhost:9990/hello
訪問的話我寫的AOP日誌攔截會輸出信息
Dubbo2.6.5入門——簡單的HelloWorld