001/**
002 * Copyright 2011 Google Inc.
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 implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.google.bitcoin.core;
018
019import java.util.List;
020
021/**
022 * Convenience implementation of {@link PeerEventListener}.
023 */
024public class AbstractPeerEventListener implements PeerEventListener {
025    public void onBlocksDownloaded(Peer peer, Block block, int blocksLeft) {
026    }
027
028    public void onChainDownloadStarted(Peer peer, int blocksLeft) {
029    }
030
031    public void onPeerConnected(Peer peer, int peerCount) {
032    }
033
034    public void onPeerDisconnected(Peer peer, int peerCount) {
035    }
036
037    public Message onPreMessageReceived(Peer peer, Message m) {
038        // Just pass the message right through for further processing.
039        return m;
040    }
041
042    public void onTransaction(Peer peer, Transaction t) {
043    }
044
045    public List<Message> getData(Peer peer, GetDataMessage m) {
046        return null;
047    }
048
049    @Override
050    public void onException(Throwable throwable) {
051    }
052}