I am using JavaNIO for my socket application. Earlier I was using input output streams. Inputstream has a method called "available" that, without blocking, returns the number os bytes available for reading from the socket. Is there any similar method which i can use with SocketChannel for reading the data from socket. Basically I wanted to know how much the tcpip buffer is getting full before read on the channel returns or simply finding it out how many bytes are available for reading.
If you are using non-blocking sockets, you can't rely on available() anymore. You have to call the read method in the SocketChannel with a byte buffer and check that you have read enough data: "read() cannot read any more bytes than are immediately available from the socket's input buffer".