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README
Apache-2.0

图片  :house:| 中文| English

一:简介

小蜜蜂连接池(BeeCP),一款小型JDBC连接池组件,具有性能高,代码轻,稳定好的特点。

  • Java语言开发,具有跨平台的优点
  • 基于参数驱动,支持多种参数设置, 支持配置文件导入
  • 适用多种数据库驱动(截止当前,主流数据库均可适配)
  • 支持本地事务与分布式事务
  • 产品采用JUC技术开发,具有单点缓存,信号量控制,队列复用,非移动等待,自旋控制, 连接和异常的传递,异步候补,安全关闭等亮点
  • 提供日志输出和监控工具
  • 健壮性好,敏捷应对意外情况(如断网,数据库服务崩溃)
  • 良好的接口扩展性

二:版本下载

Java7+

<dependency>
   <groupId>com.github.chris2018998</groupId>
   <artifactId>beecp</artifactId>
   <version>4.0.3</version>
</dependency>

Java6

<dependency>
   <groupId>com.github.chris2018998</groupId>
   <artifactId>beecp</artifactId>
   <version>1.6.10</version>
</dependency>

三:参考例子

:point_right: 例子1(独立应用)

BeeDataSourceConfig config = new BeeDataSourceConfig();
config.setDriverClassName("com.mysql.jdbc.Driver");
config.setJdbcUrl("jdbc:mysql://localhost/test");
config.setUsername("root");
config.setPassword("root");
BeeDataSource ds=new BeeDataSource(config);
Connection con=ds.getConnection();
....

:point_right: 例子2(Springbooot)

application.properties

spring.datasource.username=root
spring.datasource.password=root
spring.datasource.url=jdbc:mysql://localhost/test
spring.datasource.driverClassName=com.mysql.jdbc.Driver

DataSourceConfig.java

@Configuration
public class DataSourceConfig {
  @Value("${spring.datasource.username}")
  private String user;
  @Value("${spring.datasource.password}")
  private String password;
  @Value("${spring.datasource.url}")
  private String url;
  @Value("${spring.datasource.driverClassName}")
  private String driver;

  @Bean
  @Primary
  @ConfigurationProperties(prefix="spring.datasource")
  public DataSource primaryDataSource() {
    return DataSourceBuilder.create().type(cn.beecp.BeeDataSource.class).build();
  }
  
  @Bean
  public DataSource secondDataSource() {
   return new BeeDataSource(new BeeDataSourceConfig(driver,url,user,password));
  }
}

:sunny: 如果项目为Springboot类型,推荐使用数据源管理工具:BeeCP-Starter(无需代码开发配置即可,且自带监控界面)

四:功能导向

图片

五:运行时监控

为了更好的监控池内的运行情况(闲置连接数,使用中连接数,等待数等),产品内部提供了三种方式

  • 基于slf4j日志接口输出池内运行时信息
  • 提供Jmx方式监控
  • 提供方法级监控(可访问数据源的监控方法,得到一个可反映池内状态的Vo结果对象)

除以上方式,我们额外准备一套具有监控界面的解决方案:BeeCP-Starter

图片

图片

六:技术点对比

比较项 BeeCP HikariCP
关键技术 ThreadLocal,信号量,ConcurrentLinkedQueue,Thread FastList,ConcurrentBag,ThreadPoolExecutor
相似点 CAS使用,代理预生成,使用驱动自带Statement缓存
差异点 支持公平模式,支持XA分布事务,强制回收持有不用的连接,单点缓存,队列复用,非移动等待,独创自旋控制/连接传递程序片段 支持池暂停
文件 37个源码文件,Jar包95KB 44个源码文件,Jar包158KB
性能 总体性能高40%以上(光连接池基准)

七:代码质量

图片

八:扩展接口

1:连接工厂接口

产品内部提供两个工厂接口分别用来创建本地连接和Xa连接(一般不建议自扩展)

图片

数据源配置类(BeeDataSourceConfig)中有一个工厂类名配置项,支持4种类型

图片

参考例子

图片

2:连接密文解密

如果连接数据库使用的是密文,产品内部提供一个可供扩展的解密类,使用时将实现类名注入配置中即可。

图片

九:配置项

项名 描述 默认值
username JDBC用户名
password JDBC密码
jdbcUrl JDBC连接URL
driverClassName JDBC驱动类名
poolName 池名,如果未赋值则会自动产生一个
fairMode 是否使用公平模式 false(竞争模式)
initialSize 连接池初始大小 0
maxActive 连接池最大个数 10
borrowSemaphoreSize 信号量许可大小 min(最大连接数/2,CPU核心数)
defaultAutoCommit AutoComit默认值,未配置则从第一个连接上读取默认值
defaultTransactionIsolationCode 事物隔离代码,未设置时则从第一个连接上读取默认值
defaultCatalog Catalog默认值 ,未配置则从第一个连接上读取默认值
defaultSchema Schema默认值,未配置则从第一个连接上读取默认值
defaultReadOnly ReadOnly默认值 ,未配置则从第一个连接上读取默认值
maxWait 连接借用等待最大时间(毫秒) 8000
idleTimeout 连接闲置最大时间(毫秒) 18000
holdTimeout 连接被持有不用最大允许时间(毫秒) 18000
aliveTestSql 连接有效性测试SQL语句 SELECT 1
aliveTestTimeout 连接有效性测试超时时间(秒) 3
aliveAssumeTime 连接测试的间隔时间(毫秒) 500
forceCloseUsingOnClear 是否直接关闭使用中连接 false
delayTimeForNextClear 延迟清理的时候时间(毫秒) 3000
timerCheckInterval 闲置扫描线程间隔时间(毫秒) 18000
connectionFactoryClassName 自定义的JDBC连接工作类名
enableJmx JMX监控支持开关 false
printConfigInfo 是否打印配置信息 false
printRuntimeLog 是否打印运行时日志 false
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简介

一款小型JDBC连接池组件 展开 收起
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