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 * The HostListener is an interface implmented by resource host 027 * implementation. The interface declares host change notification 028 * methods that is invoked by a host model following one or more changes 029 * to the host configuration. 030 * 031 * @author <a href="http://www.dpml.net">Digital Product Meta Library</a> 032 * @version 1.1.0 033 */ 034 public interface HostListener extends EventListener, Remote 035 { 036 /** 037 * Notify a consumer of the change to the host name. 038 * @param event the host name change event 039 * @exception RemoteException if a remote exception occurs 040 */ 041 void nameChanged( HostNameEvent event ) throws RemoteException; 042 043 /** 044 * Notify a consumer of an aggregated set of changes concerning the 045 * base url, index, request identifier and/or authentication. 046 * @param event the host change event 047 * @exception RemoteException if a remote exception occurs 048 */ 049 void hostChanged( HostChangeEvent event ) throws RemoteException; 050 051 /** 052 * Notify a consumer of a change to the host priority. 053 * @param event the host priority event 054 * @exception RemoteException if a remote exception occurs 055 */ 056 void priorityChanged( HostPriorityEvent event ) throws RemoteException; 057 058 /** 059 * Notify a consumer of a change to the host layout. 060 * @param event the host layout change event 061 * @exception RemoteException if a remote exception occurs 062 */ 063 void layoutChanged( HostLayoutEvent event ) throws RemoteException; 064 065 } 066