NMK30703 : Programming for NetworksNonblocking I/O

The traditional Java solution for allowing the CPU to race ahead of the network is a combination of buffering and multithreading. Multiple threads can generate data for several different connections at once and store that data in buffers until the network is actually ready to send it; this approach works well for fairly simple servers and clients without extreme performance needs.
To work well, this approach needs to be supported by the underlying operating system. Fortunately, pretty much every modern operating system you’re likely to be using as a high-volume server supports such nonblocking I/O. However, it might not be well sup‐ ported on some client systems of interest, such as tablets, cell phones, and the like. Indeed, the java.nio package that provides this support is not part of any current or planned Java ME profiles, though it is found in Android. However, the whole new I/O API is designed for and only really matters on servers, which is why I haven’t done more than allude to it until we began talking about servers. Client and even peer-to-peer systems rarely need to process so many simultaneous connections that multithreaded, stream-based I/O becomes a noticeable bottleneck.

Видео NMK30703 : Programming for NetworksNonblocking I/O канала Mohamed Elshaikh