@Override
protected int doReadMessages(MessageBuf<Object> buf) throws Exception {
DatagramChannel ch = javaChannel();
ByteBuf buffer = alloc().directBuffer(config().getReceivePacketSize());
boolean free = true;
try {
ByteBuffer data = buffer.nioBuffer(buffer.writerIndex(), buffer.writableBytes());
InetSocketAddress remoteAddress = (InetSocketAddress) ch.receive(data);
if (remoteAddress == null) {
return 0;
}
buf.add(
new DatagramPacket(
buffer.writerIndex(buffer.writerIndex() + data.remaining()), remoteAddress));
free = false;
return 1;
} catch (Throwable cause) {
if (cause instanceof Error) {
throw (Error) cause;
}
if (cause instanceof RuntimeException) {
throw (RuntimeException) cause;
}
if (cause instanceof Exception) {
throw (Exception) cause;
}
throw new ChannelException(cause);
} finally {
if (free) {
buffer.free();
}
}
}