| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.ode.jacob; |
| |
| /** |
| * Interface implemented by JACOB objects that are to be indexed. Indexed objects have the nice feature that they |
| * can be retrieved from the execution queue by their index key. This is handy for introspecting the state of |
| * the execution queue. Note that indexed objects are made available so long as they are referenced in some way by |
| * objects in the queue. The reference does not need to be direct; e.g. if a {@link org.apache.ode.jacob.oo.ChannelListener} |
| * in the execution queue references an indexed object, that indexed object will be indexed. |
| * |
| * @author Maciej Szefler - m s z e f l e r @ g m a i l . c o m |
| * |
| */ |
| public interface IndexedObject { |
| |
| /** |
| * Get the value of the object's index. |
| * @return |
| */ |
| public Object getKey(); |
| |
| } |