Package org.apache.tapestry5.services
Interface ApplicationStatePersistenceStrategy
- All Known Implementing Classes:
EntityApplicationStatePersistenceStrategy,EntityApplicationStatePersistenceStrategy,SessionApplicationStatePersistenceStrategy
public interface ApplicationStatePersistenceStrategy
Used by
ApplicationStateManager to manage a specific kind of Session State Object (SSO)
persistence. The
strategy is responsible for managing SSO instances within its domain.
NOTE: The term "Application" here is a hold-over from Tapestry 5.0, which used the @ApplicationState (deprecated and deleted) annotation, and called them "ASOs" (Application State Objects). This service would be better named "SessionStatePersistenceStrategy" (but renaming it would cause backwards compatibility issues).
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Method Summary
Modifier and TypeMethodDescription<T> booleanReturns true if the SSO already exists, false if null.<T> Tget(Class<T> ssoClass, ApplicationStateCreator<T> creator) Gets the SSO from the domain.default <T> TgetIfExists(Class<T> ssoClass) Returns the SSO if it exists or null.<T> voidStores a new SSO, possibly replacing the existing one.
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Method Details
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get
Gets the SSO from the domain. If the SSO does not already exist, it is created and stored, then returned. -
set
Stores a new SSO, possibly replacing the existing one.- Type Parameters:
T-- Parameters:
ssoClass-sso- instance to store, or null to delete existing
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exists
Returns true if the SSO already exists, false if null. -
getIfExists
Returns the SSO if it exists or null.
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