/*
* Copyright (c) [2016] [ <ether.camp> ]
* This file is part of the ethereumJ library.
*
* The ethereumJ library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The ethereumJ library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the ethereumJ library. If not, see <http://www.gnu.org/licenses/>.
*/
package org.ethereum.net.rlpx.discover;
/**
* Allows to handle discovered nodes state changes
*
* Created by Anton Nashatyrev on 21.07.2015.
*/
public interface DiscoverListener {
/**
* Invoked whenever a new node appeared which meets criteria specified
* in the {@link NodeManager#addDiscoverListener} method
*/
void nodeAppeared(NodeHandler handler);
/**
* Invoked whenever a node stops meeting criteria.
*/
void nodeDisappeared(NodeHandler handler);
class Adapter implements DiscoverListener {
public void nodeAppeared(NodeHandler handler) {}
public void nodeDisappeared(NodeHandler handler) {}
}
}