Module bus.cache

Package org.miaixz.bus.cache.support.metrics

Class H2Metrics

java.lang.Object

org.miaixz.bus.cache.support.metrics.AbstractMetrics

org.miaixz.bus.cache.support.metrics.H2Metrics

All Implemented Interfaces:

Metrics

public class H2Metrics
extends AbstractMetrics

H2数据库缓存命中率统计实现

基于H2内存数据库实现的缓存命中率统计，使用单连接数据源和JdbcTemplate进行数据库操作。 自动创建缓存统计表，支持并发更新和乐观锁机制。

Since:

Java 17+

Author:

Kimi Liu

Nested Class Summary

Nested classes/interfaces inherited from class org.miaixz.bus.cache.support.metrics.AbstractMetrics

AbstractMetrics.DataDO

Nested classes/interfaces inherited from interface org.miaixz.bus.cache.Metrics

Metrics.Snapshot

Constructor Summary

Constructors

Constructor	Description
H2Metrics(String url, String username, String password)	构造方法
H2Metrics(Map<String,Object> context)	构造方法

Method Summary

Modifier and Type	Method	Description
protected Supplier<org.springframework.jdbc.core.JdbcOperations>	jdbcOperationsSupplier(Map<String,Object> context)	创建JdbcOperations并初始化数据库
void	tearDown()	销毁方法
protected Stream<AbstractMetrics.DataDO>	transferResults(List<Map<String,Object>> mapResults)	将数据库查询结果转换为DataDO流

Methods inherited from class org.miaixz.bus.cache.support.metrics.AbstractMetrics

getHitting, hitIncr, newHashMap, reqIncr, reset, resetAll

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.miaixz.bus.cache.Metrics

summaryName

Constructor Details

H2Metrics

public H2Metrics(Map<String,Object> context)

构造方法

Parameters:

context - 上下文参数

H2Metrics

public H2Metrics(String url,
 String username,
 String password)

构造方法

Parameters:

url - 数据库URL

username - 用户名

password - 密码

Method Details

jdbcOperationsSupplier

protected Supplier<org.springframework.jdbc.core.JdbcOperations> jdbcOperationsSupplier(Map<String,Object> context)

创建JdbcOperations并初始化数据库

创建H2数据库连接，初始化JdbcTemplate，并创建缓存统计表

Specified by:

jdbcOperationsSupplier in class AbstractMetrics

Parameters:

context - 上下文参数

Returns:

初始化完成的JdbcOperations对象

transferResults

protected Stream<AbstractMetrics.DataDO> transferResults(List<Map<String,Object>> mapResults)

将数据库查询结果转换为DataDO流

将查询结果Map转换为DataDO对象流，便于后续处理

Specified by:

transferResults in class AbstractMetrics

Parameters:

mapResults - 数据库查询结果

Returns:

DataDO流

tearDown

@PreDestroy
public void tearDown()

销毁方法

使用@PreDestroy注解，在Bean销毁时调用父类的tearDown方法

Overrides:

tearDown in class AbstractMetrics