AbstractDataSourcePoolMetadata (Spring Boot API)

java.lang.Object
- org.springframework.boot.jdbc.metadata.AbstractDataSourcePoolMetadata<T>

类型参数:
T - the data source type
所有已实现的接口:
DataSourcePoolMetadata
直接已知子类:
CommonsDbcp2DataSourcePoolMetadata, HikariDataSourcePoolMetadata, TomcatDataSourcePoolMetadata
```
public abstract class AbstractDataSourcePoolMetadata<T extends DataSource>
extends Object
implements DataSourcePoolMetadata
```
A base DataSourcePoolMetadata implementation.
从以下版本开始:
2.0.0

构造器概要
构造器
限定符构造器说明
protected AbstractDataSourcePoolMetadata(T dataSource)
Create an instance with the data source to use.

方法概要

所有方法实例方法具体方法
修饰符和类型	方法	说明
`protected T`	`getDataSource()`
`Float`	`getUsage()`	Return the usage of the pool as value between 0 and 1 (or -1 if the pool is not limited).

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 org.springframework.boot.jdbc.metadata.DataSourcePoolMetadata
getActive, getDefaultAutoCommit, getMax, getMin, getValidationQuery

- 构造器详细资料
  - AbstractDataSourcePoolMetadata
```
protected AbstractDataSourcePoolMetadata(T dataSource)
```
    Create an instance with the data source to use.
    参数:
    dataSource - the data source
- 方法详细资料
  - getUsage
```
public Float getUsage()
```
    从接口复制的说明: DataSourcePoolMetadata
    Return the usage of the pool as value between 0 and 1 (or -1 if the pool is not limited).
    1 means that the maximum number of connections have been allocated
    0 means that no connection is currently active
    -1 means there is not limit to the number of connections that can be allocated
    This may also return null if the data source does not provide the necessary information to compute the poll usage.
    指定者:
    getUsage 在接口中 DataSourcePoolMetadata
    返回:
    the usage value or null
  - getDataSource
```
protected final T getDataSource()
```