/**
* 有通道可读, 调用Session的onRead, 把数据读到Session的私有输入缓冲
*
* @param key
* @throws IOException
* @throws InterruptedException
*/
private void onRead(SelectionKey key) throws IOException {
Session session = (Session) key.attachment();
try {
session.onRead();
} catch (InterruptedException e) {
logger.error("OOPS Exception:", e);
Thread.currentThread().interrupt();
}
}
/**
* 有客户端连接可以接收, 分配Session, 启动Session, 这个Session专门负责处理这个客户端的所有请求
*
* @param key
* @throws IOException
*/
private void onAccept(SelectionKey key) throws IOException {
SocketChannel channel = ((ServerSocketChannel) key.channel()).accept();
opsChangeRequstMap.put(channel, new SocketChannelOPSChangeRequest(channel, 0));
if (logger.isWarnEnabled())
logger.warn("Accept client from : " + channel.socket().getRemoteSocketAddress());
channel.configureBlocking(false);
Session session = sessionManager.newSession(this, channel, false);
channel.register(selector, SelectionKey.OP_READ, session);
session.start();
}
private void dispatch() throws IOException {
SelectionKey key = null;
for (SocketChannelOPSChangeRequest request : opsChangeRequstMap.values()) {
key = request.getChannel().keyFor(selector);
if (key != null) {
// 写优先
if ((request.getOps() & SelectionKey.OP_WRITE) == SelectionKey.OP_WRITE) {
key.interestOps(SelectionKey.OP_WRITE);
request.clearOps(SelectionKey.OP_WRITE);
} else if ((request.getOps() & SelectionKey.OP_READ) == SelectionKey.OP_READ) {
key.interestOps(SelectionKey.OP_READ);
request.clearOps(SelectionKey.OP_READ);
}
}
}
isWeakuped.set(false);
if (selector.select(WaveriderConfig.WAVERIDER_DEFAULT_NETWORK_TIME_OUT) <= 0) {
return;
}
Iterator<SelectionKey> iterator = selector.selectedKeys().iterator();
while (iterator.hasNext()) {
key = (SelectionKey) iterator.next();
iterator.remove();
try {
if (!key.isValid()) {
continue;
} else if (key.isAcceptable()) {
onAccept(key);
} else if (key.isReadable()) {
// readerExecutor.execute(new NetworkTask(key, NETWORK_OPERATION_READ));
onRead(key);
} else if (key.isWritable()) {
// writerExecutor.execute(new NetworkTask(key, NETWORK_OPERATION_WRITE));
onWrite(key);
}
} catch (IOException e) {
// 客户端连接出问题
Session session = (Session) key.attachment();
if (session != null) {
session.onException();
// 释放Session
sessionManager.freeSession(session);
}
opsChangeRequstMap.remove((SocketChannel) key.channel());
key.cancel();
key.channel().close();
e.printStackTrace();
logger.error("OOPS：Exception：", e);
}
}
}
@Override
public void run() {
try {
switch (operation) {
case NETWORK_OPERATION_ACCEPT:
{
onAccept(key);
break;
}
case NETWORK_OPERATION_READ:
{
onRead(key);
break;
}
case NETWORK_OPERATION_WRITE:
{
onWrite(key);
break;
}
}
} catch (IOException e) {
logger.error("OOPS：Exception：", e);
try {
// 客户端连接出问题
Session session = (Session) key.attachment();
if (session != null) {
session.onException();
// 释放Session
sessionManager.freeSession(session);
}
opsChangeRequstMap.remove((SocketChannel) key.channel());
key.cancel();
key.channel().close();
} catch (IOException ex) {
logger.error("OOPS：Exception：", ex);
ex.printStackTrace();
}
}
}
/**
* 有通道可写, 调用Session的onWrite, 把Session的私有输出缓冲中数据写到网络
*
* @param key
* @throws IOException
*/
private void onWrite(SelectionKey key) throws IOException {
key.interestOps(key.interestOps() & ~SelectionKey.OP_WRITE);
Session session = (Session) key.attachment();
session.onWrite();
// key.interestOps(SelectionKey.OP_READ);
}
