PreInvalidationListener (IBM WebSphere Application Server, Release 8.5)

All Superinterfaces:

java.util.EventListener
```
public interface PreInvalidationListener
extends java.util.EventListener
```
Pre-invalidation listener interface used for selectively overriding invalidation events.

Field Summary

Fields
Modifier and Type	Field and Description
`static int`	`CLEAR_ALL` Define cause of invalidation for CLEAR_ALL
`static int`	`DISK_GARBAGE_COLLECTOR` Define cause of invalidation for DISK_GARBAGE_COLLECTOR
`static int`	`DISK_OVERFLOW` Define cause of invalidation for DISK_OVERFLOW
`static int`	`DISK_TIMEOUT` Define cause of invalidation for DISK_TIMEOUT
`static int`	`EXPLICIT` Define cause of invalidation for EXPLICIT
`static int`	`INACTIVE` Define cause of invalidation for INACTIVE
`static int`	`LOCAL` Define source of invalidation for LOCAL (cache in memory or disk)
`static int`	`LRU` Define cause of invalidation for Least Recently Used(LRU)
`static int`	`REMOTE` Define source of invalidation for REMOTE
`static int`	`TIMEOUT` Define cause of invalidation for TIMEOUT

Method Summary

Methods
Modifier and Type	Method and Description
`boolean`	`shouldInvalidate(java.lang.Object id, int sourceOfInvalidation, int causeOfInvalidation)` Invoked prior to an invalidation event.

- Field Detail
  - EXPLICIT
```
static final int EXPLICIT
```
    Define cause of invalidation for EXPLICIT
    
    See Also:
    Constant Field Values
  - LRU
```
static final int LRU
```
    Define cause of invalidation for Least Recently Used(LRU)
    
    See Also:
    Constant Field Values
  - TIMEOUT
```
static final int TIMEOUT
```
    Define cause of invalidation for TIMEOUT
    
    See Also:
    Constant Field Values
  - DISK_TIMEOUT
```
static final int DISK_TIMEOUT
```
    Define cause of invalidation for DISK_TIMEOUT
    
    See Also:
    Constant Field Values
  - CLEAR_ALL
```
static final int CLEAR_ALL
```
    Define cause of invalidation for CLEAR_ALL
    
    See Also:
    Constant Field Values
  - INACTIVE
```
static final int INACTIVE
```
    Define cause of invalidation for INACTIVE
    
    See Also:
    Constant Field Values
  - DISK_GARBAGE_COLLECTOR
```
static final int DISK_GARBAGE_COLLECTOR
```
    Define cause of invalidation for DISK_GARBAGE_COLLECTOR
    
    See Also:
    Constant Field Values
  - DISK_OVERFLOW
```
static final int DISK_OVERFLOW
```
    Define cause of invalidation for DISK_OVERFLOW
    
    See Also:
    Constant Field Values
  - LOCAL
```
static final int LOCAL
```
    Define source of invalidation for LOCAL (cache in memory or disk)
    
    See Also:
    Constant Field Values
  - REMOTE
```
static final int REMOTE
```
    Define source of invalidation for REMOTE
    
    See Also:
    Constant Field Values
- Method Detail
  - shouldInvalidate
```
boolean shouldInvalidate(java.lang.Object id,
                       int sourceOfInvalidation,
                       int causeOfInvalidation)
```
    Invoked prior to an invalidation event. Returned boolean will determine whether invalidation will be processed or not.
    
    Parameters:
    id - The cache id
    sourceOfInvalidation - The source of the invalidation, defined in com.ibm.websphere.cache.InvalidationEvent
    causeOfInvalidation - The cause of the invalidation, defined in com.ibm.websphere.cache.InvalidationEvent
    
    Returns:
    boolean "true" means that the invalidation event should proceed as normal. "false" means that the invalidation event should be canceled.

EXPLICIT

LRU

TIMEOUT

DISK_TIMEOUT

CLEAR_ALL

INACTIVE

DISK_GARBAGE_COLLECTOR

DISK_OVERFLOW

LOCAL

REMOTE

shouldInvalidate