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Package org.hibernate.cache.spi

Interface TimestampsCache

All Known Implementing Classes:
TimestampsCacheDisabledImpl,TimestampsCacheEnabledImpl
```
public interfaceTimestampsCache
```
Tracks invalidation of "query spaces" (tables) for the purpose of determining if a cached query result set is stale. Implementations use aspecial region the second-level cache to store invalidation timestamps.
- A query space isinvalidated in theTimestampsCache when a SQL DML statement executed by Hibernate affects the corresponding table.
- A cached query result set ischecked for staleness against theTimestampsCache when it is read from aQueryResultsRegion by aQueryResultsCache.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`default void`	`clear()`
`default void`	`destroy()`
`TimestampsRegion`	`getRegion()`	The region used to store all timestamp data.
`void`	`invalidate(String[] spaces,SharedSessionContractImplementor session)`	Perform invalidation of the passed spaces (table names) against the timestamp region data.
`boolean`	`isUpToDate(String[] spaces,Long timestamp,SharedSessionContractImplementor session)`	Perform an up-to-date check for the given set of query spaces as part of verifying the validity of cached query results.
`boolean`	`isUpToDate(Collection<String> spaces,Long timestamp,SharedSessionContractImplementor session)`	Perform an up-to-date check for the given set of query spaces as part of verifying the validity of cached query results.
`void`	`preInvalidate(String[] spaces,SharedSessionContractImplementor session)`	Perform pre-invalidation of the passed spaces (table names) against the timestamp region data.

- Method Detail
  - getRegion
```
TimestampsRegion getRegion()
```
    The region used to store all timestamp data.
  - preInvalidate
```
void preInvalidate(String[] spaces,SharedSessionContractImplementor session)
```
    Perform pre-invalidation of the passed spaces (table names) against the timestamp region data.
  - invalidate
```
void invalidate(String[] spaces,SharedSessionContractImplementor session)
```
    Perform invalidation of the passed spaces (table names) against the timestamp region data.
  - isUpToDate
```
boolean isUpToDate(String[] spaces,Long timestamp,SharedSessionContractImplementor session)
```
    Perform an up-to-date check for the given set of query spaces as part of verifying the validity of cached query results.
  - isUpToDate
```
boolean isUpToDate(Collection<String> spaces,Long timestamp,SharedSessionContractImplementor session)
```
    Perform an up-to-date check for the given set of query spaces as part of verifying the validity of cached query results.
  - clear
```
default void clear()            throwsCacheException
```
    Throws:
    CacheException
  - destroy
```
default void destroy()
```

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