001 /* 002 * Copyright 2005 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.transit.model; 020 021 import java.util.EventListener; 022 import java.rmi.Remote; 023 import java.rmi.RemoteException; 024 025 /** 026 * A listener for events related to the Transit cache subsystem. 027 * 028 * @author <a href="http://www.dpml.net">Digital Product Meta Library</a> 029 * @version 1.0.1 030 */ 031 public interface CacheListener extends EventListener, Remote 032 { 033 /** 034 * Notify the listener of a change to the cache directory. 035 * @param event the cache directory change event 036 * @exception RemoteException if a remote exception occurs 037 */ 038 void cacheDirectoryChanged( CacheDirectoryChangeEvent event ) throws RemoteException; 039 040 /** 041 * Notify the listener of the addition of a new host. 042 * @param event the host added event 043 * @exception RemoteException if a remote exception occurs 044 */ 045 void hostAdded( CacheEvent event ) throws RemoteException; 046 047 /** 048 * Notify the listener of the removal of a host. 049 * @param event the host removed event 050 * @exception RemoteException if a remote exception occurs 051 */ 052 void hostRemoved( CacheEvent event ) throws RemoteException; 053 054 }