Java：Dubbo的使用方式介绍

其他 2019-05-09 01:09:22 阅读次数: 0
版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/netyeaxi/article/details/89388447

通过一个简单的例子，介绍Dubbo环境的搭建。

使用到的组件：

zookeeper    3.5.4-beta
dubbo           2.7.1
org.slf4j        1.7.26
log4j             2.11.2
curator          4.2.0

准备4个工程以及包含的类和配置文件：

SSO-API
  com.test.sso.intf.SSODataStore
  com.test.sso.intf.SSOServiceProvider
SSO-DataStore
  com.test.sso.App
  com.test.sso.SSODataStoreImpl
  sso-service-dataStore.xml
  log4j2.xml
SSO-ServiceProvider
  com.test.sso.App
  com.test.sso.SSOServiceProviderImpl
  sso-service-provider.xml
  log4j2.xml
SSO-Consumer
  com.test.sso.App
  sso-service-consumer.xml
  log4j2.xml

其中，SSO-API只存放接口，SSO-ServiceProvider即是Provider又是Consumer，SSO-DataStore只是Provider，SSO-Consumer只是Consumer，调用关系为SSO-Consumer -> SSO-ServiceProvider -> SSO-DataStore。

Maven的pom.xml文件中统一使用如下配置：

<properties>
  <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  <dubbo.version>2.7.1</dubbo.version>
  <log4j2.version>2.11.2</log4j2.version>
  <curator.version>4.2.0</curator.version>
  <disruptor.version>3.4.2</disruptor.version>
  <slf4j.version>1.7.26</slf4j.version>
</properties>

<dependencies>
  <dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-core</artifactId>
    <version>${log4j2.version}</version>
  </dependency>
  <dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-api</artifactId>
    <version>${log4j2.version}</version>
  </dependency>
  <dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-slf4j-impl</artifactId>
    <version>${log4j2.version}</version>
  </dependency>
  <dependency>
    <groupId>com.lmax</groupId>
    <artifactId>disruptor</artifactId>
    <version>${disruptor.version}</version>
  </dependency>
  <dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-api</artifactId>
    <version>${slf4j.version}</version>
  </dependency>
  <dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>jcl-over-slf4j</artifactId>
    <version>${slf4j.version}</version>
  </dependency>

  <dependency>
    <groupId>org.apache.dubbo</groupId>
    <artifactId>dubbo</artifactId>
    <version>${dubbo.version}</version>
  </dependency>
  <dependency>
    <groupId>org.apache.curator</groupId>
    <artifactId>curator-framework</artifactId>
    <version>${curator.version}</version>
  </dependency>
  <dependency>
    <groupId>org.apache.curator</groupId>
    <artifactId>curator-client</artifactId>
    <version>${curator.version}</version>
  </dependency>
  <dependency>
    <groupId>org.apache.curator</groupId>
    <artifactId>curator-recipes</artifactId>
    <version>${curator.version}</version>
  </dependency>

  <dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>3.8.1</version>
    <scope>test</scope>
  </dependency>
</dependencies>

如果zookeeper使用的版本为3.5.4-beta，则curator要用4.2.0的版本。如果zookeeper使用的版本为3.4.14，则curator要在依赖中将zookeeper排除，同时要单独添加对zookeeper版本3.4.X的依赖。由于spring中还用到了common-logging，所以需要使用jcl-over-slf4j将对common-logging API的调用转到slf4j上。另外，由于要用到异步logger，所以添加disruptor。

log4j2.xml配置：

<?xml version="1.0" encoding="UTF-8"?>
<configuration status="error">
  <Properties>
    <Property name="baseDir">D:/Temp/eclipse/logs</Property>
    <Property name="patternFormat">%d{yyyy-MM-dd HH:mm:ss.SSS} %-5level[%3T]%c.%M:%L - %m%xEx%n</Property>
  </Properties>

  <Appenders>
    <Console name="Console" target="SYSTEM_OUT">
      <PatternLayout pattern="${patternFormat}" />
    </Console>

    <RollingFile name="data_log" fileName="${baseDir}/data.log" filePattern="${baseDir}/data-%d{yyyyMMddHHmm}.log">
      <PatternLayout pattern="${patternFormat}" />
      <Policies>
        <TimeBasedTriggeringPolicy interval="1" modulate="true" />
        <SizeBasedTriggeringPolicy size="250MB" />
      </Policies>
      <DefaultRolloverStrategy>
        <Delete basePath="${baseDir}" maxDepth="2">
          <IfFileName glob="data-*.log" />
          <IfLastModified age="10m" />
        </Delete>
      </DefaultRolloverStrategy>
    </RollingFile>
  </Appenders>

  <Loggers>
    <asyncLogger name="com.test.sso" level="info" additivity="false" includeLocation="true">
      <AppenderRef ref="data_log" />
    </asyncLogger>

    <Root level="info" includeLocation="true">
      <AppenderRef ref="Console" />
    </Root>
  </Loggers>

</configuration>

由于使用了<asyncLogger>，如果要打印出代码行号和方法名，则需要includeLocation="true"，但这样会影响性能。这几个工程的log4j2.xml内容类似，所以只给出一个例子。

SSO-API

package com.test.sso.intf;

import java.util.List;

public interface SSODataStore {
	List<String> getAllActions(long appId, long userId, byte state);
}
package com.test.sso.intf;

import java.util.List;

public interface SSOServiceProvider {
	long checkLogin(String userName, String pwd);
	List<String> fetchActionsAllowed(long appId, long userId);
	boolean checkAction(long userId, long appId, String actionName);
}

SSO-DataStore

package com.test.sso;

import java.util.ArrayList;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.test.sso.intf.SSODataStore;

public class SSODataStoreImpl implements SSODataStore {
  private final static Logger LOG = LoggerFactory.getLogger(SSODataStoreImpl.class);
  public List<String> getAllActions(long appId, long userId, byte state) {
    LOG.info("appId={}, userId={}, state={}", appId, userId, state);
    List<String> actionList = new ArrayList<>();
    actionList.add("gate_login");
    actionList.add("gate_logout");
    actionList.add("gate_heartbeat");
    return actionList;
  }
}
package com.test.sso;

import java.io.IOException;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class App {
  public static void main(String[] args) throws IOException {
    System.setProperty("java.net.preferIPv4Stack", "true");
    System.setProperty("dubbo.application.logger", "slf4j");
    // System.setProperty("log4j2.contextSelector", "org.apache.logging.log4j.core.async.AsyncLoggerContextSelector");

    ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("sso-service-dataStore.xml");
    context.start();
    System.in.read();
  }
}

其中需要注意的是如下这行代码

System.setProperty("dubbo.application.logger", "slf4j");

它将使dubbo采用slf4j作为底层日志API。可以在org.apache.dubbo.common.logger.LoggerFactory中查看到源码。

sso-service-dataStore.xml

<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://dubbo.apache.org/schema/dubbo"
  xmlns="http://www.springframework.org/schema/beans"
  xsi:schemaLocation="http://www.springframework.org/schema/beans
  http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
  http://dubbo.apache.org/schema/dubbo
  http://dubbo.apache.org/schema/dubbo/dubbo.xsd
  ">

  <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="systemPropertiesModeName" value="SYSTEM_PROPERTIES_MODE_OVERRIDE" />
    <property name="properties">
      <props>
        <prop key="service.port">20882</prop>
      </props>
    </property>
  </bean>

  <dubbo:application name="sso-service-dataStore">
    <dubbo:parameter key="qos.enable" value="false" />
    <dubbo:parameter key="qos.accept.foreign.ip" value="false" />
    <dubbo:parameter key="qos.port" value="33333" />
  </dubbo:application>

  <!-- <dubbo:registry address="multicast://224.5.6.7:1234" /> -->
  <dubbo:registry id="registryProvider" address="zookeeper://127.0.0.1:2181" />

  <dubbo:protocol id="protocolProvider" name="dubbo" port="${service.port}" />

  <!-- service definition -->
  <bean id="SSODataStoreBean" class="com.test.sso.SSODataStoreImpl" />

  <dubbo:service id="SSODataStore" interface="com.test.sso.intf.SSODataStore" 
    ref="SSODataStoreBean" version="1.0.0" registry="registryProvider" protocol="protocolProvider" />

</beans>

此应用执行时，可以使用-Dservice.port=XXXX的方式覆盖此配置文件中设置的端口号。由于qos暂时用不到，将其禁用，防止端口冲突。

SSO-ServiceProvider

package com.test.sso;

import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.test.sso.intf.SSODataStore;
import com.test.sso.intf.SSOServiceProvider;

public class SSOServiceProviderImpl implements SSOServiceProvider {
  private final static Logger LOG = LoggerFactory.getLogger(SSOServiceProviderImpl.class);
  private SSODataStore dataStore;

  public void setDataStore(SSODataStore dataStore) {
    this.dataStore = dataStore;
  }

  public long checkLogin(String userName, String pwd) {
    LOG.info("userName={}, pwd={}", userName, pwd);
    return 1001;
  }

  public List<String> fetchActionsAllowed(long appId, long userId) {
    LOG.info("appId={}, userId={}", appId, userId);
    return dataStore.getAllActions(appId, userId, (byte) 2);
  }

  public boolean checkAction(long userId, long appId, String actionName) {
    LOG.info("userId={}, appI={}, actionName={}", userId, appId, actionName);
    return true;
  }
}

package com.test.sso;

import java.io.IOException;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class App {
  public static void main(String[] args) throws IOException {
    System.setProperty("java.net.preferIPv4Stack", "true");
    System.setProperty("dubbo.application.logger", "slf4j");

    ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("sso-service-provider.xml");
    context.start();

    System.in.read();
  }
}

 sso-service-provider.xml

<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://dubbo.apache.org/schema/dubbo"
  xmlns="http://www.springframework.org/schema/beans"
  xsi:schemaLocation="http://www.springframework.org/schema/beans
  http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
  http://dubbo.apache.org/schema/dubbo
  http://dubbo.apache.org/schema/dubbo/dubbo.xsd
  ">

  <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="systemPropertiesModeName" value="SYSTEM_PROPERTIES_MODE_OVERRIDE" />
    <property name="properties">
      <props>
        <prop key="service.port">20880</prop>
      </props>
    </property>
  </bean>

  <dubbo:application name="sso-service-provider">
    <dubbo:parameter key="qos.enable" value="false" />
    <dubbo:parameter key="qos.accept.foreign.ip" value="false" />
    <dubbo:parameter key="qos.port" value="33333" />
  </dubbo:application>

  <dubbo:registry id="registryProvider" address="zookeeper://127.0.0.1:2181" />

  <dubbo:protocol id="protocolProvider" name="dubbo" port="${service.port}" />

  <!-- service reference -->
  <dubbo:reference id="SSODataStore" interface="com.test.sso.intf.SSODataStore" version="1.0.0" />

  <!-- service definition -->
  <bean id="SSOServiceProviderBean" class="com.test.sso.SSOServiceProviderImpl">
    <property name="dataStore" ref="SSODataStore" />
  </bean>

  <dubbo:service id="SSOServiceProvider" interface="com.test.sso.intf.SSOServiceProvider" ref="SSOServiceProviderBean" version="1.0.0"
    registry="registryProvider" protocol="protocolProvider" />

</beans>

SSO-Consumer

package com.test.sso;

import java.util.List;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.test.sso.intf.SSOServiceProvider;

public class App {
  public static void main(String[] args) {
    System.setProperty("dubbo.application.logger", "slf4j");

    ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext("sso-service-consumer.xml");
    context.start();

    SSOServiceProvider ssoService = (SSOServiceProvider) context.getBean("SSOServiceProvider");

    boolean ret = ssoService.checkAction(1001L, 1, "actionName");
    System.out.println(ret);

    long userId = ssoService.checkLogin("xl", "12345678");
    System.out.println(userId);

    long appId = 1;
    List<String> actionsAllowed = ssoService.fetchActionsAllowed(appId, userId);
    System.out.println(actionsAllowed);
  }
}

sso-service-consumer.xml

<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://dubbo.apache.org/schema/dubbo"
  xmlns="http://www.springframework.org/schema/beans"
  xsi:schemaLocation="http://www.springframework.org/schema/beans
  http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
  http://dubbo.apache.org/schema/dubbo
  http://dubbo.apache.org/schema/dubbo/dubbo.xsd
  ">

  <dubbo:application name="sso-service-consumer">
    <dubbo:parameter key="qos.enable" value="false" />
    <dubbo:parameter key="qos.accept.foreign.ip" value="false" />
    <dubbo:parameter key="qos.port" value="33333" />
  </dubbo:application>

  <dubbo:registry address="zookeeper://127.0.0.1:2181" />

  <dubbo:protocol name="dubbo" />

  <dubbo:reference id="SSOServiceProvider" interface="com.test.sso.intf.SSOServiceProvider" version="1.0.0" />
</beans>

可以使用如下命令分别启动zookeeper服务器和客户端：

zkServer.cmd

zkCli.cmd -server 127.0.0.1:2181

然后，启动SSO-DataStore和SSO-ServiceProvider，最后启动SSO-Consumer就可以看到执行结果。

如果想启用dubbo-admin，可以使用如下命令下载并安装dubbo-admin

git clone https://github.com/apache/incubator-dubbo-admin.git
cd incubator-dubbo-admin
mvn clean package
cd dubbo-admin-distribution/target
java -jar dubbo-admin-0.1.jar

访问方式：http://localhost:8080

参考文档

Quick start
incubator-dubbo
incubator-dubbo-admin

猜你喜欢

转载自blog.csdn.net/netyeaxi/article/details/89388447
今日推荐
中国码农的“35岁魔咒”
蘭雅 CorelDRAW 插件 2024.5.1 国际劳动节版，免费下载
Arc Browser for Windows 1.0 正式 GA
90后程序员开发视频搬运软件、不到一年获利超 700 万，结局很刑！
《美国对全球网络空间安全与发展的威胁和破坏》报告发布
周排行
[编程题]学英语
[codeforces 1288A] Deadline 约数+模
Python的web开发
Docker在Centos 7上的部署
python编码
解决Ubuntu16.04 fatal error: json/json.h: No such file or directory
mysql并发插入
rest接口如何适应jsonp的方案
linux 终端上网设置
高数——等号两边同时求导、积分的解释
每日归档
更多
2024-05-04(7)
2024-05-03(19)
2024-05-02(0)
2024-05-01(4)
2024-04-30(1)
2024-04-29(40)
2024-04-28(0)
2024-04-27(56)
2024-04-26(39)
2024-04-25(22)

代码天地 © 2018 codetd.com

境外服务器   最新电视剧2022