springboot集成dubbo

释放双眼,带上耳机,听听看~!

首先你需要下载安装一个zookeeper,下载地址http://zookeeper.apache.org/releases.html。选择你需要的版本,我这里使用的是

3.4.14。解压文件后,修改配置文件zoo.cfg。主要是dataDir,修改为自己电脑上面的地址。我使用的win7。


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1tickTime = 2000
2dataDir = D:\\zookeeper\\data
3clientPort = 2181
4initLimit = 5
5syncLimit = 2
6

在bin文件夹下找到zkServer.cmd。双击启动,启动成功会有下面的提示:


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12019-08-28 10:27:56,183 [myid:] - INFO  [main:QuorumPeerConfig@136] - Reading co
2nfiguration from: D:\tools\zookeeper-3.4.14\bin\..\conf\zoo.cfg
32019-08-28 10:27:56,183 [myid:] - INFO  [main:DatadirCleanupManager@78] - autopu
4rge.snapRetainCount set to 3
52019-08-28 10:27:56,199 [myid:] - INFO  [main:DatadirCleanupManager@79] - autopu
6rge.purgeInterval set to 0
72019-08-28 10:27:56,199 [myid:] - INFO  [main:DatadirCleanupManager@101] - Purge
8 task is not scheduled.
92019-08-28 10:27:56,199 [myid:] - WARN  [main:QuorumPeerMain@116] - Either no co
10nfig or no quorum defined in config, running  in standalone mode
112019-08-28 10:27:56,341 [myid:] - INFO  [main:QuorumPeerConfig@136] - Reading co
12nfiguration from: D:\tools\zookeeper-3.4.14\bin\..\conf\zoo.cfg
132019-08-28 10:27:56,341 [myid:] - INFO  [main:ZooKeeperServerMain@98] - Starting
14 server
152019-08-28 10:27:56,373 [myid:] - INFO  [main:Environment@100] - Server environm
16ent:zookeeper.version=3.4.14-4c25d480e66aadd371de8bd2fd8da255ac140bcf, built on
1703/06/2019 16:18 GMT
182019-08-28 10:27:56,373 [myid:] - INFO  [main:Environment@100] - Server environm
19ent:host.name=SKY-20190319PCC
202019-08-28 10:27:56,373 [myid:] - INFO  [main:Environment@100] - Server environm
21ent:java.version=1.8.0_221
222019-08-28 10:27:56,373 [myid:] - INFO  [main:Environment@100] - Server environm
23ent:java.vendor=Oracle Corporation
242019-08-28 10:27:56,373 [myid:] - INFO  [main:Environment@100] - Server environm
25ent:java.home=C:\Program Files\Java\jdk1.8.0_221\jre
262019-08-28 10:27:56,373 [myid:] - INFO  [main:Environment@100] - Server environm
27ent:java.class.path=D:\tools\zookeeper-3.4.14\bin\..\build\classes;D:\tools\zook
28eeper-3.4.14\bin\..\build\lib\*;D:\tools\zookeeper-3.4.14\bin\..\zookeeper-3.4.1
294.jar;D:\tools\zookeeper-3.4.14\bin\..\lib\audience-annotations-0.5.0.jar;D:\too
30ls\zookeeper-3.4.14\bin\..\lib\jline-0.9.94.jar;D:\tools\zookeeper-3.4.14\bin\..
31\lib\log4j-1.2.17.jar;D:\tools\zookeeper-3.4.14\bin\..\lib\netty-3.10.6.Final.ja
32r;D:\tools\zookeeper-3.4.14\bin\..\lib\slf4j-api-1.7.25.jar;D:\tools\zookeeper-3
33.4.14\bin\..\lib\slf4j-log4j12-1.7.25.jar;D:\tools\zookeeper-3.4.14\bin\..\conf
342019-08-28 10:27:56,373 [myid:] - INFO  [main:Environment@100] - Server environm
35ent:java.library.path=C:\Program Files\Java\jdk1.8.0_221\bin;C:\Windows\Sun\Java
36\bin;C:\Windows\system32;C:\Windows;C:\Program Files (x86)\Common Files\Oracle\J
37ava\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\
38System32\WindowsPowerShell\v1.0\;C:\Program Files\Java\jdk1.8.0_221\bin;C:\Progr
39am Files\Java\jdk1.8.0_221\jre\bin;D:\tools\apache-maven-3.6.1\bin\;;.
402019-08-28 10:27:56,388 [myid:] - INFO  [main:Environment@100] - Server environm
41ent:java.io.tmpdir=C:\Users\ADMINI~1\AppData\Local\Temp\
422019-08-28 10:27:56,388 [myid:] - INFO  [main:Environment@100] - Server environm
43ent:java.compiler=<NA>
442019-08-28 10:27:56,388 [myid:] - INFO  [main:Environment@100] - Server environm
45ent:os.name=Windows 7
462019-08-28 10:27:56,388 [myid:] - INFO  [main:Environment@100] - Server environm
47ent:os.arch=amd64
482019-08-28 10:27:56,404 [myid:] - INFO  [main:Environment@100] - Server environm
49ent:os.version=6.1
502019-08-28 10:27:56,404 [myid:] - INFO  [main:Environment@100] - Server environm
51ent:user.name=Administrator
522019-08-28 10:27:56,404 [myid:] - INFO  [main:Environment@100] - Server environm
53ent:user.home=C:\Users\Administrator
542019-08-28 10:27:56,419 [myid:] - INFO  [main:Environment@100] - Server environm
55ent:user.dir=D:\tools\zookeeper-3.4.14\bin
562019-08-28 10:27:56,435 [myid:] - INFO  [main:ZooKeeperServer@836] - tickTime se
57t to 2000
582019-08-28 10:27:56,435 [myid:] - INFO  [main:ZooKeeperServer@845] - minSessionT
59imeout set to -1
602019-08-28 10:27:56,435 [myid:] - INFO  [main:ZooKeeperServer@854] - maxSessionT
61imeout set to -1
622019-08-28 10:27:56,708 [myid:] - INFO  [main:ServerCnxnFactory@117] - Using org
63.apache.zookeeper.server.NIOServerCnxnFactory as server connection factory
642019-08-28 10:27:56,716 [myid:] - INFO  [main:NIOServerCnxnFactory@89] - binding
65 to port 0.0.0.0/0.0.0.0:2181
66

到这里前期准备工作就做好了。下面是dubbo工程创建。

你需要创建三个maven工程,一个common,一个consumer,一个provider

首先我们创建一个common项目。

主要注意点有两个,1接口定义


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1package com.common.service;
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3public interface ComputeService {
4
5   Integer add(int a, int b);
6}
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8

2pom文件内容,这里我将devtools注释了,不然会导致报错。具体原因有待研究


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1<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
2  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
3  <modelVersion>4.0.0</modelVersion>
4
5  <groupId>com</groupId>
6  <artifactId>common</artifactId>
7  <version>0.0.1-SNAPSHOT</version>
8  <packaging>jar</packaging>
9
10  <name>common</name>
11  <url>http://maven.apache.org</url>
12  <parent>
13      <groupId>org.springframework.boot</groupId>
14      <artifactId>spring-boot-starter-parent</artifactId>
15      <version>2.1.7.RELEASE</version>
16      <relativePath/> <!-- lookup parent from repository -->
17  </parent>
18  <properties>
19    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
20  </properties>
21
22  <dependencies>
23<!--       <dependency>
24          <groupId>org.springframework.boot</groupId>
25          <artifactId>spring-boot-devtools</artifactId>
26      </dependency> -->
27      <dependency>
28          <groupId>org.springframework.boot</groupId>
29          <artifactId>spring-boot-starter-web</artifactId>
30          <exclusions>
31              <exclusion>
32                  <groupId>org.springframework.boot</groupId>
33                  <artifactId>spring-boot-starter-logging</artifactId>
34              </exclusion>
35          </exclusions>
36      </dependency>
37      <!-- dubbo -->
38      <dependency>
39          <groupId>com.alibaba.spring.boot</groupId>
40          <artifactId>dubbo-spring-boot-starter</artifactId>
41          <version>2.0.0</version>
42      </dependency>
43      <dependency>
44          <groupId>com.101tec</groupId>
45          <artifactId>zkclient</artifactId>
46          <version>0.10</version>
47      </dependency>
48<!--       <dependency>
49          <groupId>org.apache.zookeeper</groupId>
50          <artifactId>zookeeper</artifactId>
51          <version>3.4.6</version>
52      </dependency> -->
53  </dependencies>
54</project>
55
56

下面是consumer项目。项目结构如下

springboot集成dubbo

Application类是启动类


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1package com.consumer;
2
3import org.springframework.boot.SpringApplication;
4import org.springframework.boot.autoconfigure.SpringBootApplication;
5import org.springframework.context.annotation.ImportResource;
6
7@SpringBootApplication
8@ImportResource({"classpath:dubbo.xml"})
9public class Application {
10  public static void main(String[] args) {
11      SpringApplication.run(Application.class, args);
12  }
13}
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15

ComputeController是对外调用接口,可以使用测试类或者定时任务代替。


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1package com.consumer.controller;
2
3import org.springframework.beans.factory.annotation.Autowired;
4import org.springframework.web.bind.annotation.RequestMapping;
5import org.springframework.web.bind.annotation.RestController;
6
7import com.consumer.service.DComputeService;
8
9@RestController
10public class ComputeController {
11
12  @Autowired
13  private DComputeService dcService;
14 
15  @RequestMapping("getSome")
16  public Integer getSome(int a, int b) {
17      return dcService.getSome(a, b);
18  }
19}
20
21

DComputeService是关键类,调用provider暴露的接口


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1package com.consumer.service;
2
3import org.springframework.beans.factory.annotation.Autowired;
4import org.springframework.stereotype.Component;
5
6import com.common.service.ComputeService;
7
8@Component
9public class DComputeService{
10
11  @Autowired
12  private ComputeService computeService;
13 
14  public Integer getSome(int a, int b) {
15      System.out.println("=========consumer=========");
16      return computeService.add(a, b);
17  }
18}
19
20

这里的application.properties只是简单的配置,可以根据自己的需要补充


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1dubbo.registry.adress=localhost:2181
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3server.port=8081
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5

最后一个是dubbo的配置文件。


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1<?xml version="1.0" encoding="UTF-8"?>
2<beans xmlns="http://www.springframework.org/schema/beans"
3       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4       xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
5       xsi:schemaLocation="http://www.springframework.org/schema/beans
6       http://www.springframework.org/schema/beans/spring-beans.xsd
7       http://code.alibabatech.com/schema/dubbo
8       http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
9
10    <!-- 服务命名 -->
11    <dubbo:application name="consumer"/>
12
13    <!-- 指定注册中心 -->
14    <dubbo:registry id="zookeeper" protocol="zookeeper" address="${dubbo.registry.adress}"/>
15
16    <!-- 指定服务提供者和服务消费者的通信协议 -->
17    <dubbo:protocol name="dubbo" port="40001"/>
18
19  <dubbo:reference id="computeService" interface="com.common.service.ComputeService" check="false"
20                  version="1.0" registry="zookeeper" protocol="dubbo" timeout="1500"/>
21    
22    
23
24</beans>
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pom文件要注意添加common项目的依赖


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1       <dependency>
2           <groupId>com</groupId>
3           <artifactId>common</artifactId>
4           <version>0.0.1-SNAPSHOT</version>
5       </dependency>
6

到这里consumer的配置就完成了。

最后是provider项目。

项目结构和consumer类似。这里就不展示了。

启动类SpringBootApplication


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1package com.wc.www.ScBus;
2
3import org.mybatis.spring.annotation.MapperScan;
4import org.springframework.boot.SpringApplication;
5import org.springframework.context.annotation.ImportResource;
6
7@org.springframework.boot.autoconfigure.SpringBootApplication
8@ImportResource({"classpath:dubbo.xml"})
9public class SpringBootApplication {
10  public static void main(String[] args) {
11      SpringApplication.run(SpringBootApplication.class, args);
12  }
13
14}
15
16

对外暴露的接口DComputeService


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1package com.wc.www.ScBus.service;
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3import org.springframework.stereotype.Component;
4
5import com.common.service.ComputeService;
6
7@Component
8public class DComputeService implements ComputeService{
9
10  public Integer add(int a, int b) {
11      System.out.println("=========server===========");
12      System.out.println("a: " + a + ",b: "+ b);
13      return a + b;
14  }
15}
16
17

dubbo配置


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1<?xml version="1.0" encoding="UTF-8"?>
2<beans xmlns="http://www.springframework.org/schema/beans"
3       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4       xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
5       xsi:schemaLocation="http://www.springframework.org/schema/beans
6       http://www.springframework.org/schema/beans/spring-beans.xsd
7       http://code.alibabatech.com/schema/dubbo
8       http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
9
10    <!-- 服务命名 -->
11    <dubbo:application name="ScBus"/>
12
13    <!-- 指定注册中心 -->
14    <dubbo:registry id="zookeeper" protocol="zookeeper" address="zookeeper://127.0.0.1:2181"/>
15
16    <!-- 指定服务提供者和服务消费者的通信协议 -->
17    <dubbo:protocol name="dubbo" port="20881" dispather="all" threadpool="cached" threads="5000"/>
18
19    <!-- 暴露服务接口及接口关联的实现 -->
20    <dubbo:service interface="com.common.service.ComputeService" ref="computeService"
21          timeout="1000" retries="3" registry="zookeeper" version="1.0"/>
22    <bean id="computeService" class="com.wc.www.ScBus.service.DComputeService"/>
23</beans>
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25

pom文件记得加入common项目的依赖


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1       <dependency>
2           <groupId>com</groupId>
3           <artifactId>common</artifactId>
4           <version>0.0.1-SNAPSHOT</version>
5       </dependency>
6

到这里provider也完成了。

启动provider项目,然后启动consumer,在浏览器的地址栏输入


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1http://localhost:8081/getSome?a=4&b=2
2

如果正确的话,会返回一个“6”;

 

下面简单总结一些搭建过程中的问题。

1consumer找不到注册的服务。

在consumer的dubbo配置文件的dubbo:reference标签里面,我加了一个version="1.0"。但是在provider的dubbo:service标签中没有添加,导致找不到对于的服务。添加后问题解决了

网上有一个解释是说,provider的实现类没有使用dubbo的@Service 注解。这个经过测试不是必须的。

 

如果搭建中遇到文件,建议首先检查自己的配置文件是否正确。一开始的时候可以把配置文件写简单一点。非必须的属性可以先不写。避免不必要的错误。

先写到这里。后面有机会再做深入一些的探索

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