我向所有用户发送消息给地图。interestOps抛出IllegalArgumentException
for (User u : _userMap.values()) {
u.getMessages().add(data);
u.getKey().interestOps(SelectionKey.OP_WRITE);
}
但whene我运行这个功能我看到线程
异常 “主” java.lang.IllegalArgumentException异常
此线错误
u.getKey().interestOps(SelectionKey.OP_WRITE);
信息getKey ()返回SelectionKey,getMessages返回ArrayList,数据是一个带有mes的byte []数组圣人我读了使用channel.read(缓冲区);
更多信息:
在构造函数中我做出选择
_selector = Selector.open();
我运行服务器
public void startServer() throws IOException {
while (true) {
_selector.select();
Iterator<SelectionKey> keys = _selector.selectedKeys().iterator();
while (keys.hasNext()) {
SelectionKey key = keys.next();
keys.remove();
if (!key.isValid())
continue;
if (key.isAcceptable())
accept(key);
else if (key.isReadable())
read(key);
else if (key.isWritable())
write(key);
}
}
}
我接受连接
private void accept(SelectionKey key) throws IOException {
ServerSocketChannel serverChannel = (ServerSocketChannel) key.channel();
SocketChannel channel = serverChannel.accept();
channel.configureBlocking(false);
User u = new User(key);
_userMap.put(channel, u);
channel.register(_selector, SelectionKey.OP_READ);
}
在读功能whene我读MES圣人我有这每个循环。但是,当一个用户,我移动与interestOps只是后面的循环它的工作原理。
//u.getKey().interestOps(SelectionKey.OP_WRITE);
}
key.interestOps(SelectionKey.OP_WRITE);
完全读写功能:
private void read(SelectionKey key) throws IOException {
SocketChannel channel = (SocketChannel) key.channel();
ByteBuffer buffer = ByteBuffer.allocate(2048);
int read = -1;
try {
read = channel.read(buffer);
} catch (Exception e) {
e.printStackTrace();
}
if (read == -1) {
_userMap.remove(channel);
channel.close();
key.cancel();
return;
}
byte[] data = new byte[read];
System.arraycopy(buffer.array(), 0, data, 0, read);
/// WYSyŁA DO WSZYSTKICH. usunąć
for (User u : _userMap.values()) {
u.getMessages().add(data);
u.getKey().interestOps(SelectionKey.OP_WRITE);
}
//key.interestOps(SelectionKey.OP_WRITE);
///////
}
private void write(SelectionKey key) throws IOException {
SocketChannel channel = (SocketChannel) key.channel();
ArrayList<byte[]> msg = _userMap.get(channel).getMessages();
Iterator<byte[]> i = msg.iterator();
while (i.hasNext()) {
byte[] item = i.next();
i.remove();
channel.write(ByteBuffer.wrap(item));
}
key.interestOps(SelectionKey.OP_READ);
}
SOLUTION:
我现在不能回答我的问题,所以把它放在这里:
的SelectionKey在接受法有点残疾。我试图用read方法中的新键替换它,并且它可以工作。所以在User类中,我不再保留SelectionKey var,现在我保留SocketChannel。一个SocketChannel有keyFor继续作用的方法,所以whene我有选择,我可以得到关键
u.getChannel().keyFor(_selector).interestOps(SelectionKey.OP_WRITE);
您是否阅读过javadoc:http:// docs。oracle.com/javase/6/docs/api/java/nio/channels/SelectionKey.html#interestOps(int) – 2012-03-21 17:57:15
是的,但我不明白。 – user1248092 2012-03-21 18:41:30
关闭通道取消密钥。你自己不需要这样做。 – EJP 2012-03-21 20:53:55