001 /*
002 * Copyright 2004 Niclas Hedhman.
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.monitor;
020
021 import java.net.URL;
022
023 /**
024 * A router that handles multicasr distribution of monitor events to registered monitors.
025 *
026 * @author <a href="http://www.dpml.net">Digital Product Meta Library</a>
027 * @version 1.0.1
028 */
029 public class NetworkMonitorRouter extends AbstractMonitorRouter
030 implements NetworkMonitor, Router
031 {
032
033 //--------------------------------------------------------------------
034 // NetworkMonitor
035 //--------------------------------------------------------------------
036
037 /**
038 * Notify all subscribing monitors of a updated event.
039 * @param resource the url of the updated resource
040 * @param expected the size in bytes of the download
041 * @param count the progress in bytes
042 */
043 public void notifyUpdate( URL resource, int expected, int count )
044 {
045 Monitor[] monitors = getMonitors();
046 for( int i=0; i < monitors.length; i++ )
047 {
048 NetworkMonitor monitor = (NetworkMonitor) monitors[i];
049 monitor.notifyUpdate( resource, expected, count );
050 }
051 }
052
053 /**
054 * Notify all subscribing monitors of a download completion event.
055 * @param resource the url of the downloaded resource
056 */
057 public void notifyCompletion( URL resource )
058 {
059 Monitor[] monitors = getMonitors();
060 for( int i=0; i < monitors.length; i++ )
061 {
062 NetworkMonitor monitor = (NetworkMonitor) monitors[i];
063 monitor.notifyCompletion( resource );
064 }
065 }
066
067 /**
068 * Add a monitor to the list of monitors managed by this router.
069 * @param monitor the monitor to add
070 * @exception IllegalArgumentException if the supplied monitor is not a NetworkMonitor
071 */
072 public void addMonitor( Monitor monitor ) throws IllegalArgumentException
073 {
074 if( !( monitor instanceof NetworkMonitor ) )
075 {
076 throw new IllegalArgumentException( "monitor must be NetworkMonitor type." );
077 }
078 else
079 {
080 super.addMonitor( monitor );
081 }
082 }
083 }
084