package com.ecar.apm.config;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import javax.sql.DataSource;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.DependsOn;
import org.springframework.context.annotation.Primary;

import com.alibaba.druid.filter.Filter;
import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.wall.WallConfig;
import com.alibaba.druid.wall.WallFilter; 

@Configuration  
public class DruidDBConfig {  
    private Logger logger = LoggerFactory.getLogger(DruidDBConfig.class);  
    
    @Autowired  
    WallFilter wallFilter;  
      
    @Value("${spring.datasource.url}")  
    private String dbUrl;  
      
    @Value("${spring.datasource.username}")  
    private String username;  
      
    @Value("${spring.datasource.password}")  
    private String password;  
      
    @Value("${spring.datasource.driver-class-name}")  
    private String driverClassName;  
      
    @Value("${spring.datasource.initialSize}")  
    private int initialSize;  
      
    @Value("${spring.datasource.minIdle}")  
    private int minIdle;  
      
    @Value("${spring.datasource.maxActive}")  
    private int maxActive;  
      
    @Value("${spring.datasource.maxWait}")  
    private int maxWait;  
      
    @Value("${spring.datasource.timeBetweenEvictionRunsMillis}")  
    private int timeBetweenEvictionRunsMillis;  
      
    @Value("${spring.datasource.minEvictableIdleTimeMillis}")  
    private int minEvictableIdleTimeMillis;  
      
    @Value("${spring.datasource.validationQuery}")  
    private String validationQuery;  
      
    @Value("${spring.datasource.testWhileIdle}")  
    private boolean testWhileIdle;  
      
    @Value("${spring.datasource.testOnBorrow}")  
    private boolean testOnBorrow;  
      
    @Value("${spring.datasource.testOnReturn}")  
    private boolean testOnReturn;  
      
    @Value("${spring.datasource.poolPreparedStatements}")  
    private boolean poolPreparedStatements;  
      
    @Value("${spring.datasource.maxPoolPreparedStatementPerConnectionSize}")  
    private int maxPoolPreparedStatementPerConnectionSize;  
      
    @Value("${spring.datasource.filters}")  
    private String filters;  
      
    @Value("{spring.datasource.connectionProperties}")  
    private String connectionProperties;  
      
    @Bean     //声明其为Bean实例  
    @Primary  //在同样的DataSource中，首先使用被标注的DataSource  
    @ConfigurationProperties(prefix = "spring.datasource")
    public DataSource dataSource(){  
        DruidDataSource datasource = new DruidDataSource();  
        datasource.setUrl(this.dbUrl);  
        datasource.setUsername(username);  
        datasource.setPassword(password);  
        datasource.setDriverClassName(driverClassName);  
        //configuration  
        datasource.setInitialSize(initialSize);  
        datasource.setMinIdle(minIdle);  
        datasource.setMaxActive(maxActive);  
        datasource.setMaxWait(maxWait);  
        datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);  
        datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);  
        datasource.setValidationQuery(validationQuery);  
        datasource.setTestWhileIdle(testWhileIdle);  
        datasource.setTestOnBorrow(testOnBorrow);  
        datasource.setTestOnReturn(testOnReturn);  
        datasource.setPoolPreparedStatements(poolPreparedStatements);  
        datasource.setMaxPoolPreparedStatementPerConnectionSize(maxPoolPreparedStatementPerConnectionSize);  
        datasource.setConnectionProperties(connectionProperties);  
        List<Filter> extraFilters = new ArrayList<>();
        extraFilters.add(wallFilter);
        datasource.setProxyFilters(extraFilters);
        try {  
            datasource.setFilters(filters);  
        } catch (SQLException e) {  
            logger.error("druid configuration initialization filter", e);  
        }  
        return datasource;  
    }  
    
    @Bean(name = "wallFilter")  
    @DependsOn("wallConfig")  
    public WallFilter wallFilter(WallConfig wallConfig){  
        WallFilter wallFilter = new WallFilter();  
        wallFilter.setConfig(wallConfig);  
        return wallFilter;  
    }  
  
    @Bean(name = "wallConfig")  
    public WallConfig wallConfig(){  
        WallConfig wallConfig = new WallConfig();  
        wallConfig.setMultiStatementAllow(true);//允许一次执行多条语句  
        wallConfig.setNoneBaseStatementAllow(true);//允许一次执行多条语句  
        return wallConfig;  
    }  
}