/* * Copyright 1999-2011 Alibaba Group. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.alibaba.dubbo.remoting; import java.net.InetSocketAddress; /** * Channel. (API/SPI, Prototype, ThreadSafe) * * @see com.alibaba.dubbo.remoting.Client * @see com.alibaba.dubbo.remoting.Server#getChannels() * @see com.alibaba.dubbo.remoting.Server#getChannel(InetSocketAddress) * @author qian.lei * @author william.liangf */ public interface Channel extends Endpoint { /** * get remote address. * * @return remote address. */ InetSocketAddress getRemoteAddress(); /** * is connected. * * @return connected */ boolean isConnected(); /** * has attribute. * * @param key key. * @return has or has not. */ boolean hasAttribute(String key); /** * get attribute. * * @param key key. * @return value. */ Object getAttribute(String key); /** * set attribute. * * @param key key. * @param value value. */ void setAttribute(String key,Object value); /** * remove attribute. * * @param key key. */ void removeAttribute(String key); }