001    // Copyright 2007 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.ioc.services;
016    
017    import org.apache.tapestry5.ioc.Registry;
018    
019    /**
020     * Used in {@link ServiceActivity} to identify the state of the service in terms of its overall lifecycle.
021     */
022    public enum Status
023    {
024        /**
025         * A builtin service that exists before the {@link Registry} is constructed.
026         */
027        BUILTIN,
028    
029        /**
030         * The service is defined in a module, but has not yet been referenced.
031         */
032        DEFINED,
033    
034        /**
035         * A proxy has been created for the service, but no methods of the proxy have been invoked.
036         */
037        VIRTUAL,
038    
039        /**
040         * A service implementation for the service has been created.
041         */
042        REAL
043    }