001 // Copyright 2004, 2005 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.hivemind; 016 017 /** 018 * Implemented by a core service implementationsthat require notification when they are 019 * discarded. This interface is only used by the 020 * {@link org.apache.hivemind.impl.servicemodel.ThreadedServiceModel threaded service model}, 021 * which creates a service for a short period, then discards it when notified 022 * by the {@link org.apache.hivemind.service.ThreadEventNotifier}. 023 * 024 * <p> 025 * The service instance will be discarded regardless; this interface allows 026 * the core service implementation to know immediately when this happens, 027 * so that it can release any acquired resources. 028 * 029 * @author Howard Lewis Ship 030 */ 031 public interface Discardable 032 { 033 /** 034 * Invoked when a service is being discarded. 035 */ 036 public void threadDidDiscardService(); 037 }