001    // Copyright 2007, 2008 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry5.services;
016    
017    import org.apache.tapestry5.ioc.annotations.UsesMappedConfiguration;
018    
019    /**
020     * Used to provide access to {@link org.apache.tapestry5.services.ApplicationStatePersistenceStrategySource} instances
021     * via a logical name for the stategy, such as "session".
022     */
023    @UsesMappedConfiguration(ApplicationStatePersistenceStrategy.class)
024    public interface ApplicationStatePersistenceStrategySource
025    {
026        /**
027         * Returns the named strategy.
028         *
029         * @param name of strategy to access
030         * @return the strategy
031         * @throws RuntimeException if the name does not match a configured strategy
032         */
033        ApplicationStatePersistenceStrategy get(String name);
034    }