Я написал простой эхо-клиент и селектор каждый раз, когда выбирает SocketChannel как читаемый. У меня EOF, если я попытаюсь прочитать этот socketChannel.SelectedKeys не удаляет socketChannel и Selector выбирает его каждый раз
Я удалил SelectedKey из selector.selectedKeys(). В чем проблема с селектором?
import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.SocketChannel;
import java.nio.charset.Charset;
import java.util.Iterator;
public class Test {
public static void main(String[] args) {
try {
Selector selector = Selector.open();
SocketChannel socketChannel = SocketChannel.open();
socketChannel.configureBlocking(false);
socketChannel.register(selector, SelectionKey.OP_CONNECT | SelectionKey.OP_WRITE | SelectionKey.OP_READ);
socketChannel.connect(new InetSocketAddress("localhost", 2000));
System.out.println("start eventloop");
ByteBuffer byteBuffer = ByteBuffer.wrap("echo\n".getBytes());
int i = 0;
while(true) {
try{
if(i++==10) break;
selector.select();
System.out.println("events: " + selector.selectedKeys().size());
Iterator<SelectionKey> it = selector.selectedKeys().iterator();
while(it.hasNext()) {
SelectionKey selectionKey = it.next();
SocketChannel channel = (SocketChannel)selectionKey.channel();
if(selectionKey.isConnectable()) {
System.out.println("connectable");
try{
channel.finishConnect();
System.out.println("connected " + channel.getLocalAddress() + " <> " + channel.getRemoteAddress());
} catch (Exception e) {
e.printStackTrace();
channel.close();
}
}
if(selectionKey.isReadable()) {
System.out.println("readable");
ByteBuffer buffer = ByteBuffer.allocate(32);
buffer.clear();
int x = channel.read(buffer);
if(x > 0) {
buffer.flip();
System.out.println("server> " + Charset.defaultCharset().decode(buffer).toString());
} else {
System.out.println("EOF");
}
}
if(selectionKey.isWritable()) {
System.out.println("writeable");
channel.write(byteBuffer);
byteBuffer.flip();
channel.register(selector, SelectionKey.OP_READ);
}
it.remove();
}
System.out.println("not handled events:" + selector.selectedKeys().size());
} catch (Exception e) {
e.printStackTrace();
break;
}
}
selector.close();
socketChannel.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
STDOUT:
start eventloop
events: 1
connectable
connected /127.0.0.1:65283 <> localhost/127.0.0.1:2000
not handled events:0
events: 1
writeable
not handled events:0
events: 1
readable
server> echo
not handled events:0
events: 1
readable
EOF
not handled events:0
events: 1
readable
EOF
not handled events:0
events: 1
readable
EOF
not handled events:0
events: 1
readable
EOF
not handled events:0
events: 1
readable
EOF
not handled events:0
events: 1
readable
EOF
not handled events:0
events: 1
readable
EOF
not handled events:0