微服务集成Apollo配置中心，同时动态刷新数据库

• 集成Apollo

  • 引入Apollo的jar

  <dependency>
      <groupId>com.ctrip.framework.apollo</groupId>
      <artifactId>apollo-client</artifactId>
      <version>1.4.0</version>
  </dependency>
  

  • 修改启动类

  在项目启动主类上添加 @EnableApolloConfig
  

  • 修改主配置文件

  # 在 application.yml 中,添加以下配置
  app:
    id: aiop-cmdb-job  #在Apollo中的唯一id，可以为项目名或不重复的数字，要与启动起来的apollo服务对应
  apollo:
    meta: http://localhost:8080  # 在 portal==》apollo-env.properties中配置的对应的meta
   
  

• 配置动态刷新数据库

  • 添加动态配置类

  package aiop.cmdb.job.config;
  
  import com.ctrip.framework.apollo.Config;
  import com.ctrip.framework.apollo.model.ConfigChangeEvent;
  import com.ctrip.framework.apollo.spring.annotation.ApolloConfig;
  import com.ctrip.framework.apollo.spring.annotation.ApolloConfigChangeListener;
  import lombok.extern.slf4j.Slf4j;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties;
  import org.springframework.context.ApplicationContext;
  import org.springframework.context.annotation.Bean;
  import org.springframework.context.annotation.Configuration;
  import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource;
  
  import javax.sql.DataSource;
  import java.util.Collections;
  
  /**
   * @author lisongyu
   * @date 2020/01/17
   */
  @Configuration
  @Slf4j
  public class DataSourceConfiguration {
  
  
      private final static String DATASOURCE_TAG = "db";
  
      @Autowired
      ApplicationContext context;
  
  
      @ApolloConfig
      Config config;
  
      @Bean
      public DynamicDataSource dynamicDataSource() {
          DynamicDataSource source = new DynamicDataSource();
          source.setTargetDataSources(Collections.singletonMap(DATASOURCE_TAG, dataSource()));
          return source;
      }
  
      @ApolloConfigChangeListener(interestedKeyPrefixes = {"spring.datasource","spring.rabbitmq","jedis.pool"})
      public void onChange(ConfigChangeEvent changeEvent) {
          changeEvent.changedKeys().forEach(s -> {
              DynamicDataSource source = context.getBean(DynamicDataSource.class);
              source.setTargetDataSources(Collections.singletonMap(DATASOURCE_TAG, dataSource()));
              source.afterPropertiesSet();
              log.info("动态切换数据源为：{}", config.getProperty("spring.datasource.url", ""));
          });
      }
  
      public DataSource dataSource() {
          DataSourceProperties dataSource = new DataSourceProperties();
          dataSource.setUrl(config.getProperty("spring.datasource.url", ""));
          dataSource.setUsername(config.getProperty("spring.datasource.username", ""));
          dataSource.setPassword(config.getProperty("spring.datasource.password", ""));
          return dataSource.initializeDataSourceBuilder().build();
      }
  
      class DynamicDataSource extends AbstractRoutingDataSource {
          @Override
          protected Object determineCurrentLookupKey() {
              return DATASOURCE_TAG;
          }
      }
  }