/* * 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.exchange; import com.alibaba.dubbo.common.Constants; import com.alibaba.dubbo.common.URL; import com.alibaba.dubbo.common.extension.Adaptive; import com.alibaba.dubbo.common.extension.SPI; import com.alibaba.dubbo.remoting.RemotingException; import com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchanger; /** * Exchanger. (SPI, Singleton, ThreadSafe) * * <a href="http://en.wikipedia.org/wiki/Message_Exchange_Pattern">Message Exchange Pattern</a> * <a href="http://en.wikipedia.org/wiki/Request-response">Request-Response</a> * * @author william.liangf */ @SPI(HeaderExchanger.NAME) public interface Exchanger { /** * bind. * * @param url * @param handler * @return message server */ @Adaptive({Constants.EXCHANGER_KEY}) ExchangeServer bind(URL url, ExchangeHandler handler) throws RemotingException; /** * connect. * * @param url * @param handler * @return message channel */ @Adaptive({Constants.EXCHANGER_KEY}) ExchangeClient connect(URL url, ExchangeHandler handler) throws RemotingException; }