001    /*
002     * Copyright 2004-2006 Stephen J. McConnell.
003     *
004     * Licensed  under the  Apache License,  Version 2.0  (the "License");
005     * you may not use  this file  except in  compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     *   http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed  under the  License is distributed on an "AS IS" BASIS,
012     * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY KIND, either  express  or
013     * implied.
014     *
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    
019    package net.dpml.annotation;
020    
021    /**
022     * Lifecycle policy.
023     * @author <a href="http://www.dpml.net">Digital Product Management Laboratory</a>
024     * @version 2.0.1
025     */
026    public enum LifestylePolicy
027    {
028       /**
029        * Declares that a single instance created from the component class
030        * shall be shared across all instance requests.  Components declaring 
031        * this policy must ensure that implementations are threadsafe.
032        */
033        SINGLETON,
034       
035       /**
036        * Declares that a new instance of the class shall be created for 
037        * each thread context.
038        */
039        THREAD,
040        
041       /**
042        * Declares that a new instance shall be created per request.
043        */
044        TRANSIENT;
045    }