FlashPersistentFieldStrategy (Tapestry API - 5.7.3)

java.lang.Object
- org.apache.tapestry5.internal.services.AbstractSessionPersistentFieldStrategy
- - org.apache.tapestry5.internal.services.FlashPersistentFieldStrategy

All Implemented Interfaces:

PersistentFieldStrategy
```
public class FlashPersistentFieldStrategy
extends AbstractSessionPersistentFieldStrategy
```
The "flash" strategy stores data inside the session, just like SessionPersistentFieldStrategy, but also removes the values from the session on first use. In this way, a short-term value (such as an error message) will "survive" from an action request to a render request and then disappear.

Constructor Summary

Constructors
Constructor Description

FlashPersistentFieldStrategy(Request request)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`didReadChange(Session session, String attributeName)`	Called after each key is read by `AbstractSessionPersistentFieldStrategy.gatherFieldChanges(String)`.

Methods inherited from class org.apache.tapestry5.internal.services.AbstractSessionPersistentFieldStrategy
convertApplicationValueToPersisted, convertPersistedToApplicationValue, discardChanges, gatherFieldChanges, postChange

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - FlashPersistentFieldStrategy
```
public FlashPersistentFieldStrategy(Request request)
```
- Method Detail
  - didReadChange
```
protected void didReadChange(Session session,
                             String attributeName)
```
    Description copied from class: AbstractSessionPersistentFieldStrategy
    
    Called after each key is read by AbstractSessionPersistentFieldStrategy.gatherFieldChanges(String). This implementation does nothing, subclasses may override.
    
    Overrides:
    
    didReadChange in class AbstractSessionPersistentFieldStrategy
    
    Parameters:
    
    session - the session from which a value was just read
    
    attributeName - the name of the attribute used to read a value