spring boot 数据库连接池配置

HikariCP 连接池配置:

http://stackoverflow.com/questions/29650501/hikaricp-starts-when-mvn-spring-bootrun-but-not-with-a-deployable-war-file

http://stackoverflow.com/questions/26490967/how-do-i-configure-hikaricp-in-my-spring-boot-app-in-my-application-properties-f

https://github.com/spring-projects/spring-boot/issues/418

spring.datasource.validation-query=SELECT 1
spring.datasource.max-active=10
spring.datasource.max-idle=8
spring.datasource.min-idle=8
spring.datasource.initial-size=5
spring.datasource.test-on-borrow=true
spring.datasource.test-on-return=true

spring.datasource.url=jdbc:mysql://localhost:3306/myDb
spring.datasource.driverClassName=com.mysql.jdbc.Driver

@Configuration
class DataSourceConfig {

   @Value('${spring.datasource.username}')
   private String user;

   @Value('${spring.datasource.password}')
   private String password;

   @Value('${spring.datasource.url}')
   private String dataSourceUrl;

   @Value('${spring.datasource.dataSourceClassName}')
   private String dataSourceClassName;

   @Value('${spring.datasource.connectionTimeout}')
   private int connectionTimeout;

   @Value('${spring.datasource.maxLifetime}')
   private int maxLifetime;

   @Bean
   public DataSource primaryDataSource() {
      Properties dsProps = [url: dataSourceUrl, user: user, password: password]
      Properties configProps = [
            connectionTestQuery: 'select 1 from dual',
            connectionTimeout: connectionTimeout,
            dataSourceClassName: dataSourceClassName,
            dataSourceProperties: dsProps,
            maxLifetime: maxLifetime
      ]

      // A default max pool size of 10 seems reasonable for now, so no need to configure for now.
      HikariConfig hc = new HikariConfig(configProps)
      HikariDataSource ds = new HikariDataSource(hc)
      ds
   }
}