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Voovan is a java framwork and it not depends on any third-party framework.
package org.voovan.network;
import org.voovan.Global;
import org.voovan.network.exception.ReadMessageException;
import org.voovan.network.exception.SendMessageException;
import org.voovan.network.handler.SynchronousHandler;
import org.voovan.tools.buffer.ByteBufferChannel;
import org.voovan.tools.TEnv;
import org.voovan.tools.hashwheeltimer.HashWheelTask;
import org.voovan.tools.log.Logger;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.SelectionKey;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.TimeoutException;
/**
* 会话抽象类
*
* @author helyho
*
* Voovan Framework.
* WebSite: https://github.com/helyho/Voovan
* Licence: Apache v2 License
*/
public abstract class IoSession {
private Map attributes;
private boolean sslMode = false;
private SSLParser sslParser;
private MessageLoader messageLoader;
protected ByteBufferChannel readByteBufferChannel;
protected ByteBufferChannel sendByteBufferChannel;
private T socketContext;
private long lastIdleTime = -1;
private HashWheelTask checkIdleTask;
private HeartBeat heartBeat;
private State state;
private SelectionKey selectionKey;
private SocketSelector socketSelector;
/**
* 会话状态管理
*/
public class State {
private volatile boolean init = true;
private volatile boolean connect = false;
private volatile boolean receive = false;
private volatile boolean send = false;
private volatile boolean close = false;
public boolean isInit() {
return init;
}
public void setInit(boolean init) {
this.init = init;
}
public boolean isConnect() {
return connect;
}
public void setConnect(boolean connect) {
this.connect = connect;
}
public boolean isReceive() {
return receive;
}
public void setReceive(boolean receive) {
this.receive = receive;
}
public boolean isSend() {
return send;
}
public void setSend(boolean send) {
this.send = send;
}
public boolean isClose() {
return close;
}
public void setClose(boolean close) {
this.close = close;
}
}
/**
* 构造函数
* @param socketContext socketContext对象
*/
public IoSession(T socketContext){
attributes = new ConcurrentHashMap();
this.socketContext = socketContext;
this.state = new State();
readByteBufferChannel = new ByteBufferChannel(socketContext.getReadBufferSize());
sendByteBufferChannel = new ByteBufferChannel(socketContext.getSendBufferSize());
messageLoader = new MessageLoader(this);
checkIdle();
}
/**
* 获取 Socket 选择器
* @return Socket 选择器
*/
public SocketSelector getSocketSelector() {
return socketSelector;
}
/**
* 设置 Socket 选择器
* @param socketSelector Socket 选择器
*/
protected void setSocketSelector(SocketSelector socketSelector) {
this.socketSelector = socketSelector;
}
/**
* 获取 Event 执行器
* @return Event 执行器
*/
protected EventRunner getEventRunner() {
return socketSelector.getEventRunner();
}
/**
* 获取 SelectionKey
* @return SelectionKey 对象
*/
protected SelectionKey getSelectionKey() {
return selectionKey;
}
/**
* 设置 SelectionKey
* @param selectionKey SelectionKey 对象
*/
void setSelectionKey(SelectionKey selectionKey) {
this.selectionKey = selectionKey;
}
/**
* 获取心跳对象
* @return 心跳对象
*/
public HeartBeat getHeartBeat() {
return heartBeat;
}
/**
* 设置心跳对象
* @return 心跳对象
*/
void setHeartBeat(HeartBeat heartBeat) {
this.heartBeat = heartBeat;
}
/**
* 获取状态
* @return 当前状态
*/
public State getState() {
return state;
}
/**
* 启动空闲事件触发
*/
public void checkIdle(){
if(socketContext.getIdleInterval() > 0) {
if(checkIdleTask == null){
final IoSession session = this;
checkIdleTask = new HashWheelTask() {
public void run() {
//触发空闲事件
long timeDiff = System.currentTimeMillis() - lastIdleTime;
if (timeDiff >= socketContext.getIdleInterval() * 1000) {
boolean isConnect = false;
//初始化状态
if(session.state.isInit() ||
session.state.isConnect()) {
return;
}
//检测会话状态
if(session.state.isClose()){
session.cancelIdle();
return;
}
//获取连接状态
isConnect = session.isConnected();
if(!isConnect){
session.cancelIdle();
this.cancel();
return;
}
//检查空间时间
if(socketContext.getIdleInterval() < 1){
return;
}
EventTrigger.fireIdle(session);
lastIdleTime = System.currentTimeMillis();
}
}
};
checkIdleTask.run();
Global.getHashWheelTimer().addTask(checkIdleTask, 1);
}
}
}
/**
* 停止空闲事件触发
*/
public void cancelIdle(){
if(checkIdleTask!=null) {
checkIdleTask.cancel();
checkIdleTask = null;
if(heartBeat!=null){
heartBeat = null;
}
}
}
/**
* 获取空闲事件时间
* @return 空闲事件时间
*/
public int getIdleInterval() {
return socketContext.getIdleInterval();
}
/**
* 设置空闲事件时间
* @param idleInterval 空闲事件时间
*/
public void setIdleInterval(int idleInterval) {
socketContext.setIdleInterval(idleInterval);
}
/**
* 获取接收的输出流
*
* @return 接收的输出流
*/
public ByteBufferChannel getReadByteBufferChannel() {
return readByteBufferChannel;
}
/**
* 获取发送收的输出流
*
* @return 发送的输出流
*/
public ByteBufferChannel getSendByteBufferChannel() {
return sendByteBufferChannel;
}
/**
* 获取 SSLParser
* @return SSLParser对象
*/
public SSLParser getSSLParser() {
return sslParser;
}
/**
* 获取 SSLParser
* @param sslParser SSL解析对象
*/
protected void setSSLParser(SSLParser sslParser) {
if(this.sslParser == null && sslParser!=null){
this.sslParser = sslParser;
sslMode = true;
}
}
public boolean isSSLMode() {
return sslMode;
}
/**
* 获取全部会话参数
* @return 会话参数Map
*/
public Map getAttributes(){
return this.attributes;
}
/**
* 获取会话参数
* @param key 参数名
* @return 参数对象
*/
public Object getAttribute(Object key) {
return attributes.get(key);
}
/**
* 设置会话参数
* @param key 参数名
* @param value 参数对象
*/
public void setAttribute(Object key, Object value) {
this.attributes.put(key, value);
}
/**
* 移除会话参数
* @param key 参数名
*/
public void removeAttribute(Object key) {
this.attributes.remove(key);
}
/**
* 检查会话参数是否存在
* @param key 参数名
* @return 是否包含
*/
public boolean containAttribute(Object key) {
return this.attributes.containsKey(key);
}
/**
* 获取本地 IP 地址
* @return 本地 IP 地址
*/
public abstract String localAddress();
/**
* 获取本地端口
* @return 返回-1为没有取到本地端口
*/
public abstract int loaclPort();
/**
* 获取对端 IP 地址
* @return 对端 ip 地址
*/
public abstract String remoteAddress();
/**
* 获取对端端口
* @return 返回-1为没有取到对端端口
*/
public abstract int remotePort();
/**
* 获取 socket 连接上下文
* @return socket 连接上下文, 连接断开时返回的是null
*/
public T socketContext() {
return socketContext;
};
/**
* 读取消息到缓冲区
* @return 接收数据大小
* @throws IOException IO 异常
*/
protected int read0() throws IOException {
return socketSelector.readFromChannel(socketContext, socketContext.socketChannel());
}
/**
* 直接从缓冲区读取数据
* @param byteBuffer 字节缓冲对象ByteBuffer,读取 前需要使用 enabledMessageSpliter(false) 停止分割器的工作,除非有特殊的需求.
* @return 读取的字节数
* @throws IOException IO异常
* */
public int read(ByteBuffer byteBuffer) throws IOException {
int readSize = -1;
if (byteBuffer != null && !this.getReadByteBufferChannel().isReleased()) {
readSize = this.getReadByteBufferChannel().readHead(byteBuffer);
}
if(!this.isConnected() && readSize <= 0){
readSize = -1;
}
return readSize;
}
/**
* 同步读取消息
* 消息会经过 filter 的 decoder 函数处理后再返回
* @return 读取出的对象
* @throws ReadMessageException 读取消息异常
*/
public Object syncRead() throws ReadMessageException {
Object readObject = null;
SynchronousHandler synchronousHandler = null;
int waitedTime = 0;
if(socketContext.handler() instanceof SynchronousHandler) {
synchronousHandler = (SynchronousHandler) socketContext.handler();
}else{
throw new ReadMessageException("Use the syncRead method must set an object of SynchronousHandler into the socket handler ");
}
try {
//如果响应对象不存在则继续循环等待直到结果出现
SynchronousHandler finalSynchronousHandler = synchronousHandler;
TEnv.wait(socketContext.getReadTimeout(), ()->!finalSynchronousHandler.hasNextResponse() && isConnected());
if(isConnected()) {
readObject = ((SynchronousHandler) socketContext.handler()).getResponse();
}
if(readObject == null && !isConnected()){
throw new ReadMessageException("Method syncRead error! Socket is disconnected");
}
if(readObject instanceof Throwable){
Exception exception = (Exception) readObject;
if (exception != null) {
removeAttribute("SocketException");
throw new ReadMessageException("Method syncRead error! Error by " +
exception.getClass().getSimpleName() + ". " + exception.getMessage(), exception);
}
} else {
return readObject;
}
} catch (TimeoutException e) {
throw new ReadMessageException("syncRead readFromChannel timeout or socket is disconnect");
}
return readObject;
}
/**
* 发送消息到 JVM 的 SocketChannel
* 注意直接调用不会出发 onSent 事件
* @param buffer 发送缓冲区
* @return 读取的字节数
* @throws IOException IO 异常
*/
protected int send0(ByteBuffer buffer) throws IOException {
return socketSelector.writeToChannel(socketContext, buffer);
}
/**
* 发送消息到发送缓冲区
* @param buffer 发送到缓冲区的 ByteBuffer 对象
* @return 添加至缓冲区的字节数
*/
public int sendByBuffer(ByteBuffer buffer) {
try {
return sendByteBufferChannel.writeEnd(buffer);
} catch (Exception e) {
if (socketContext.isConnected()) {
Logger.error("IoSession.sendByBuffer buffer failed", e);
}
}
return -1;
}
/**
* 同步发送消息
* 消息会经过 filter 的 encoder 函数处理后再发送
* @param obj 要发送的对象
* @throws SendMessageException 消息发送异常
*/
public void syncSend(Object obj) throws SendMessageException{
//等待 ssl 握手完成
try {
if(sslParser!=null) {
TEnv.wait(socketContext.getReadTimeout(), ()->!sslParser.handShakeDone);
}
if (obj != null) {
try {
EventProcess.sendMessage(this, obj);
flush();
}catch (Exception e){
throw new SendMessageException("Method syncSend error! Error by "+
e.getClass().getSimpleName() + ".",e);
}
}
} catch (TimeoutException e) {
throw new SendMessageException("Method syncSend error! Error by "+
e.getClass().getSimpleName() + ".",e);
}
}
/**
* 直接向缓冲区发送消息
* 注意直接调用不会触发 onSent 事件, 也不会经过任何过滤器
* @param buffer byte缓冲区
* @return 发送的数据大小
*/
public int send(ByteBuffer buffer){
try {
if(sslParser!=null && sslParser.isHandShakeDone()) {
//warpData 内置调用 session.send0 将数据送至发送缓冲区
sslParser.warpData(buffer);
return buffer.limit();
} else {
//如果大于缓冲区,则现发送一次
if(buffer.limit() + sendByteBufferChannel.size() > sendByteBufferChannel.getMaxSize()){
flush();
}
return sendByBuffer(buffer);
}
} catch (IOException e) {
Logger.error("IoSession.writeToChannel data failed" ,e);
}
return -1;
}
/**
* 推送缓冲区的数据到 socketChannel
*/
public void flush() {
if(sendByteBufferChannel.size()>0) {
ByteBuffer byteBuffer = sendByteBufferChannel.getByteBuffer();
try {
send0(byteBuffer);
//触发发送事件
EventTrigger.fireFlush(this);
} catch (IOException e) {
if(isConnected()) {
if (socketContext.isConnected()) {
Logger.error("IoSession.flush buffer failed", e);
}
}
} finally {
sendByteBufferChannel.compact();
}
}
}
/**
* 获取消息处理类
* @return 消息处理类
*/
public MessageLoader getMessageLoader() {
return messageLoader;
}
/**
* 获取消息分割处理类
* @return 消息分割处理类
*/
protected abstract MessageSplitter getMessagePartition();
/**
* 设置是否使用分割器读取
* @param useSpliter true 使用分割器读取,false 不使用分割器读取,且不会出发 onRecive 事件
*/
public void enabledMessageSpliter(boolean useSpliter) {
messageLoader.enable(useSpliter);
}
/**
* 会话是否连接
* @return true: 连接,false: 关闭
*/
public abstract boolean isConnected();
/**
* 会话是否打开
* @return true: 打开,false: 关闭
*/
public abstract boolean isOpen();
/**
* 关闭会话
* @return 是否关闭
*/
public abstract boolean close();
public void release() {
socketSelector.unRegister(selectionKey);
}
@Override
public abstract String toString();
}
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