五、HikariCP 源码分析之初始化分析二

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VIP免费原创最新推荐文章于 2026-06-09 17:39:19 发布 282 阅读 AI 写同款· GEO 优化 ›

SpringBoot启动时HikariCP不创建连接池问题解决方案我们直接进入主题。通常情况下，我们SpringBoot项目启动完成时，HikariCP都会创建连接池。我们在控制台的日志中就能直接看到这个信息： com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting... com.zaxxer.hikari.HikariDataSource : HikariPool-1... 阅读详情

HikariPool 的初始化

在上一节，我们说到了pool = fastPathPool = new HikariPool(this);中的new HikariPool(this)。我们来看下代码：

public HikariPool(final HikariConfig config) {
  //①
  //PoolBase
  super(config);
  //②
  // 构建一个connectionBag用于保存连接, connectionBag是连接池的核心
  this.connectionBag = new ConcurrentBag<>(this);
  //初始化连接计数器, 用于统计连接池中的连接数量
  this.totalConnections = new AtomicInteger();
  //根据是否允许挂起连接池, 初始化锁
  this.suspendResumeLock = config.isAllowPoolSuspension() ? new SuspendResumeLock() : SuspendResumeLock.FAUX_LOCK;
  //③
  //连接池统计
  if (config.getMetricsTrackerFactory() != null) {
     setMetricsTrackerFactory(config.getMetricsTrackerFactory());
  } else {
     setMetricRegistry(config.getMetricRegistry());
  }

  setHealthCheckRegistry(config.getHealthCheckRegistry());
  //注册 JMX 相关的 bean
  registerMBeans(this);
  //④
  checkFailFast();
  //⑤
  ThreadFactory threadFactory = config.getThreadFactory();
  this.addConnectionExecutor = createThreadPoolExecutor(config.getMaximumPoolSize(), poolName + " connection adder", threadFactory, new ThreadPoolExecutor.DiscardPolicy());
  this.closeConnectionExecutor = createThreadPoolExecutor(config.getMaximumPoolSize(), poolName + " connection closer", threadFactory, new ThreadPoolExecutor.CallerRunsPolicy());

  if (config.getScheduledExecutorService() == null) {
     threadFactory = threadFactory != null ? threadFactory : new DefaultThreadFactory(poolName + " house