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java.lang.Objectorg.springframework.web.context.request.AbstractRequestAttributesScope
org.springframework.web.context.request.SessionScope
public class SessionScope
Session-backed Scope
implementation.
Relies on a thread-bound RequestAttributes instance, which
can be exported through RequestContextListener,
RequestContextFilter or
DispatcherServlet.
This Scope will also work for Portlet environments,
through an alternate RequestAttributes implementation
(as exposed out-of-the-box by Spring's
DispatcherPortlet.
RequestContextHolder.currentRequestAttributes(),
RequestAttributes.SCOPE_SESSION,
RequestAttributes.SCOPE_GLOBAL_SESSION,
RequestContextListener,
RequestContextFilter,
DispatcherServlet,
DispatcherPortlet| Constructor Summary | |
|---|---|
SessionScope()
Create a new SessionScope, storing attributes in a locally isolated session (or default session, if there is no distinction between a global session and a component-specific session). |
|
SessionScope(boolean globalSession)
Create a new SessionScope, specifying whether to store attributes in the global session, provided that such a distinction is available. |
|
| Method Summary | |
|---|---|
Object |
get(String name,
ObjectFactory objectFactory)
Return the object with the given name from the underlying scope, creating it
if not found in the underlying storage mechanism. |
String |
getConversationId()
Return the conversation ID for the current underlying scope, if any. |
protected int |
getScope()
Template method that determines the actual target scope. |
Object |
remove(String name)
Remove the object with the given name from the underlying scope. |
| Methods inherited from class org.springframework.web.context.request.AbstractRequestAttributesScope |
|---|
registerDestructionCallback |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
public SessionScope()
public SessionScope(boolean globalSession)
This distinction is important for Portlet environments, where there are two notions of a session: "portlet scope" and "application scope". If this flag is on, objects will be put into the "application scope" session; else they will end up in the "portlet scope" session (the typical default).
In a Servlet environment, this flag is effectively ignored.
globalSession - true in case of the global session as target;
false in case of a component-specific session as targetPortletRequestAttributes,
ServletRequestAttributes| Method Detail |
|---|
protected int getScope()
AbstractRequestAttributesScope
getScope in class AbstractRequestAttributesScopeRequestAttributes constantRequestAttributes.SCOPE_REQUEST,
RequestAttributes.SCOPE_SESSION,
RequestAttributes.SCOPE_GLOBAL_SESSIONpublic String getConversationId()
ScopeThe exact meaning of the conversation ID depends on the underlying
storage mechanism. In the case of session-scoped objects, the
conversation ID would typically be equal to (or derived from) the
session ID; in the
case of a custom conversation that sits within the overall session,
the specific ID for the current conversation would be appropriate.
Note: This is an optional operation. It is perfectly valid to
return null in an implementation of this method if the
underlying storage mechanism has no obvious candidate for such an ID.
null if there is no
conversation ID for the current scope
public Object get(String name,
ObjectFactory objectFactory)
Scopecreating it
if not found in the underlying storage mechanism.
This is the central operation of a Scope, and the only operation that is absolutely required.
get in interface Scopeget in class AbstractRequestAttributesScopename - the name of the object to retrieveobjectFactory - the ObjectFactory to use to create the scoped
object if it is not present in the underlying storage mechanism
null)public Object remove(String name)
Scopename from the underlying scope.
Returns null if no object was found; otherwise
returns the removed Object.
Note that an implementation should also remove a registered destruction callback for the specified object, if any. It does, however, not need to execute a registered destruction callback in this case, since the object will be destroyed by the caller (if appropriate).
Note: This is an optional operation. Implementations may throw
UnsupportedOperationException if they do not support explicitly
removing an object.
remove in interface Scoperemove in class AbstractRequestAttributesScopename - the name of the object to remove
null if no object was presentScope.registerDestructionCallback(java.lang.String, java.lang.Runnable)
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