用Apollo来实现动态更新datasource

原创
2018/08/01 16:57
阅读数 3K

这个是apollo中的datasource的namespace.

sb项目中的配置如下:

package com.miaoyouche.user.config;

import com.ctrip.framework.apollo.model.ConfigChangeEvent;
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.boot.context.properties.EnableConfigurationProperties;
import org.springframework.cloud.context.config.annotation.RefreshScope;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;

@Slf4j
@Configuration
@EnableConfigurationProperties(DataSourceProperties.class)
public class DataSourceConfig {
    @Autowired
    ApplicationContext context;
    @Autowired
    private org.springframework.cloud.context.scope.refresh.RefreshScope refreshScope;

    @ApolloConfigChangeListener("datasource1")
    private void onChange(ConfigChangeEvent changeEvent) {
        DataSourceProperties dataSourceProperties = context.getBean(DataSourceProperties.class);
        changeEvent.changedKeys().stream().forEach(s -> {
            if (s.contains("spring.datasource.password")) {
                dataSourceProperties.setPassword(changeEvent.getChange(s).getNewValue());
            }
        });
        refreshScope.refresh("dataSource");
    }

    @RefreshScope
    @Bean
    public DataSource dataSource(DataSourceProperties dataSourceProperties) {
        return dataSourceProperties.initializeDataSourceBuilder().build();
    }
}

@ApolloConfigChanageListener会监听到datasource1的namespace变化,变化后重新为DataSourceProperties的属性赋值.Apollo自身会在检测变化的时候,更新@RefreshScope的注解的bean

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