Spring事务源码-ConnectionHolder

作用

用来维持链接相关信息，主要用在事务中。

变量

@Nullable
	private ConnectionHandle connectionHandle;

	@Nullable
	private Connection currentConnection;   //当前连接

	private boolean transactionActive = false;   //当前事务是否已经激活

	@Nullable
	private Boolean savepointsSupported;   //是否支持savepoint

	private int savepointCounter = 0;     //记录savepoint的个数