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 // Copyright 2007, 2008 The Apache Software Foundation
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package org.apache.tapestry5.services;

Used by ApplicationStateManager to manage a specific kind of Session State Object (SSO) persistence. The stategy is responsible for managing SSO instances within its domain.

{
    
Gets the SSO from the domain. If the ASO does not already exist, it is created and stored, then returned.
    <T> T get(Class<T> ssoClassApplicationStateCreator<T> creator);

    
Stores a new SSO, possibly replacing the existing one.

Parameters:
<T>
ssoClass
sso instance to store, or null to delete existing
    <T> void set(Class<T> ssoClass, T sso);

    
Returns true if the SSO already exists, false if null.
    <T> boolean exists(Class<T> ssoClass);
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