Hi all,
I'm planning to work on a virtual console driver for JOS applicative programs
enhancing the current "console/consoled". My aim is to allow an applicative
program to use the System.in and System.out streams to perform console
operation.
First of all, is there anyone that is currently working on this issue ?
Secondly, I've found a problem on the "scope" of static members: System.in and
System.out are static members, i.e. single instances inside the SAME virtual
machine. This approach is valid for the "standard" use of Java upon a operating
system such as WinNT/9X or Unix/Linux: different Java processes are started
inside different Java Virtual Machines, thus each process uses its own
System.in and System.out streams. But in the JOS environment, there is a SINGLE
virtual machine thus, by analogy, there might be only ONE instance of
System.in and System.out, shared among ALL threads (and thus all appications) of
the machine. This means that, basically, all threads are using the SAME console.
Obviously this is not possible and the streams System.in and System.out of JOS
must act as "wrappers", determining the current console of the current thread
and calling then the appropriate console driver. In this case, the 'java.lang.System'
class provided by Sun can be no longer used, and it is necessary to suitably
rewrite this class for JOS.
I'm studying this problem and when I have a solution, I will prepare a
descriptive document. Meanwhile, do you have any suggestion ?
Bye,
Corrado.
--
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Eng. Corrado Santoro - PhD Student
Unversity of Catania - Engineering Faculty
Institute of Computer Science and Telecommunications
Viale A. Doria, 6 - 95125 CATANIA (ITALY)
Tel: +39 095 7382365 Fax: +39 095 7382397
EMail: [EMAIL PROTECTED]
Personal Home Page:
http://www.cdc.unict.it/~csanto
ARCA Mobile Agent Framework Home Page:
http://netra.cdc.unict.it/ARCA
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