用于线程间通信的OutputStream和InputStream

Question

I have the following problem:

I am given a module with the following API:

    public void start(InputStream input, OutputStream output,
        InputStream error, PipeListener<T> listener) 

The purpose of this module is to facilitate communication between the main system and external processes (in this case, instances of Process).

What I am trying to do is to implement a "mock process", which actually is a Thread instance, but has its own pseudo input, output and error streams. The key thing here is the nature of the streams themselves, for example, I want the stream implementation returned by

((MockProcess)mockProcess).getInputStream() 

to be functionally identical to

((Process)realProcess).getInputStream(). 

For all intents and purposes, they should be completely interchangeable.

Which InputStream and OutputStream implementation (respectively) should I use to achieve this? The only suggestion I have been able to find is to use piped streams...but is this really the best option?

Answer 1

I would say they are the best option because pipes are used for interprocess communications on unix. You should avoid any form of I/O on disks. And you should avoid all heavy tcp/ip overload. So pipes are really the best option.