/* * 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 java.util.concurrent.atomic.AtomicLong; import com.alibaba.dubbo.common.utils.StringUtils; /** * Request. * * @author qian.lei * @author william.liangf */ public class Request { public static final String HEARTBEAT_EVENT = null; public static final String READONLY_EVENT = "R"; private static final AtomicLong INVOKE_ID = new AtomicLong(0); private final long mId; private String mVersion; private boolean mTwoWay = true; private boolean mEvent = false; private boolean mBroken = false; private Object mData; public Request() { mId = newId(); } public Request(long id){ mId = id; } public long getId() { return mId; } public String getVersion() { return mVersion; } public void setVersion(String version) { mVersion = version; } public boolean isTwoWay() { return mTwoWay; } public void setTwoWay(boolean twoWay) { mTwoWay = twoWay; } public boolean isEvent() { return mEvent; } public void setEvent(String event) { mEvent = true; mData = event; } public boolean isBroken() { return mBroken; } public void setBroken(boolean mBroken) { this.mBroken = mBroken; } public Object getData() { return mData; } public void setData(Object msg) { mData = msg; } public boolean isHeartbeat() { return mEvent && HEARTBEAT_EVENT == mData; } public void setHeartbeat(boolean isHeartbeat) { if (isHeartbeat) { setEvent(HEARTBEAT_EVENT); } } private static long newId() { // getAndIncrement()增长到MAX_VALUE时,再增长会变为MIN_VALUE,负数也可以做为ID return INVOKE_ID.getAndIncrement(); } @Override public String toString() { return "Request [id=" + mId + ", version=" + mVersion + ", twoway=" + mTwoWay + ", event=" + mEvent + ", broken=" + mBroken + ", data=" + (mData == this ? "this" : safeToString(mData)) + "]"; } private static String safeToString(Object data) { if (data == null) return null; String dataStr; try { dataStr = data.toString(); } catch (Throwable e) { dataStr = "<Fail toString of " + data.getClass() + ", cause: " + StringUtils.toString(e) + ">"; } return dataStr; } }