Why doesn't more Java code use PipedInputStream / PipedOutputStream?

Question

I\'ve discovered this idiom recently, and I am wondering if there is something I am missing. I\'ve never seen it used. Nearly all Java code I\'ve worked with in the wild fav

Answer 1

Also, back to the original example: no, it does not exactly minimize memory usage either. DOM tree(s) get built, in-memory buffering done -- while that is better than full byte array replicas, it's not that much better. But buffering in this case will be slower; and an extra thread is also created -- you can not use PipedInput/OutputStream pair from within a single thread.

Sometimes PipedXxxStreams are useful, but the reason they are not used more is because quite often they are not the right solution. They are ok for inter-thread communication, and that's where I have used them for what that's worth. It's just that there aren't that many use cases for this, given how SOA pushes most such boundaries to be between services, instead of between threads.