Re: [Jython-users] Threading problems, print etc.

[Kevin J. Butler <kevinbutler1@bi...>]

Guy Gascoigne-Piggford wrote:
> Failing that, is it possible to simply override the print statement and 
> have it call one of my own java functions?  I'd rather do this than go 
> through all of my scripts changing a print statement into a print function.

Jython 2.1 on java1.3.0 (JIT: null)
Type "copyright", "credits" or "license" for more information.
 >>> import sys
 >>> class Logger:
...   def __init__( self, old ):
...     self.old = old
...   def write( self, msg ):
...     self.old.write( "Log: %s" % msg )
...
 >>> sys.stdout = Logger( sys.stdout )
Log: >>> print "Yip"
Log: YipLog:
Log: >>>

Make of it what you will...  :-)

kb

Re: [Jython-users] Need help configuring Linux in order to install Jython

[Kevin J. Butler <kevinbutler1@bi...>]

This is really a unix shell question.  :-)

It sounds like you haven't added /usr/local/java/bin to your current environment.

Try either:

1) PATH=/usr/local/java/bin:$PATH; export PATH
(and add this line to your .bashrc file)

or

2) ln -s /usr/local/java/bin/java /usr/local/bin
(and repeat for javac and any other java executables you want).

or

3) source FULL_PATH_TO_THE_FILE/java-rmi.cgi
(and add this to your .bashrc file)

kb


 > Joseph Schiller wrote:
 > Hi,
 >
 > I have setup a dual boot machine running Windows95 alongside with Linux
 > Mandrake 7.2.  I've successfully downloaded Java2 SDK 1.4 from
 > http://www.blackdown.org, but I'm having a difficulty configuring Java
 > and installing Jython.  I have downloaded the Jython-21.class and I am
 > following the commands, but bash is complaining about the command
 > 'java'.  The difficulty arose from the 2.0 gig partition limit under
 > Win95, so I installed Java2 on a different partition, the Linux img file
 > takes more than 1.0 gigabyte and alongside with Windows there's hardly
 > any space left to do anything useful.  Because Java does not reside in
 > the typical /usr/local directory, I need to configure the PATH,
 > JAVA_HOME, and CLASSPATH variables along with a couple config files.
 > Using the 'export' command, I thought I did everything correctly, but
 > I'm still not able to install Jython. Should I edit the ~/.bashrc file
 > directly? The j2sdk-config file shows PATH=/bin:/usr/bin, the
 > java-rmi.cgi also shows PATH=/usr/local/java/bin:$PATH and there are
 > other files that show the same.  At this point I realize that not
 > installing in the /usr/local/java directory was a mistake, but running
 > out of space, I had no choice.  Any suggestions will be most welcome.
 >
 > Sincerely,
 >
 > Joseph Schiller
 >

Re: [Jython-users] Need help configuring Linux in order to install Jython

[Kevin Butler <kbutler@ca...>]

This is really a unix shell question.  :-)

It sounds like you haven't added /usr/local/java/bin to your current environment.

Try either:

1) PATH=/usr/local/java/bin:$PATH; export PATH
(and add this line to your .bashrc file)

or

2) ln -s /usr/local/java/bin/java /usr/local/bin
(and repeat for javac and any other java executables you want).

or

3) source FULL_PATH_TO_THE_FILE/java-rmi.cgi
(and add this to your .bashrc file)

kb


Joseph Schiller wrote:
> Hi,
> 
> I have setup a dual boot machine running Windows95 alongside with Linux
> Mandrake 7.2.  I've successfully downloaded Java2 SDK 1.4 from
> http://www.blackdown.org, but I'm having a difficulty configuring Java
> and installing Jython.  I have downloaded the Jython-21.class and I am
> following the commands, but bash is complaining about the command
> 'java'.  The difficulty arose from the 2.0 gig partition limit under
> Win95, so I installed Java2 on a different partition, the Linux img file
> takes more than 1.0 gigabyte and alongside with Windows there's hardly
> any space left to do anything useful.  Because Java does not reside in
> the typical /usr/local directory, I need to configure the PATH,
> JAVA_HOME, and CLASSPATH variables along with a couple config files.
> Using the 'export' command, I thought I did everything correctly, but
> I'm still not able to install Jython. Should I edit the ~/.bashrc file
> directly? The j2sdk-config file shows PATH=/bin:/usr/bin, the
> java-rmi.cgi also shows PATH=/usr/local/java/bin:$PATH and there are
> other files that show the same.  At this point I realize that not
> installing in the /usr/local/java directory was a mistake, but running
> out of space, I had no choice.  Any suggestions will be most welcome.
> 
> Sincerely,
> 
> Joseph Schiller

[Jython-users] Need help configuring Linux in order to install Jython

[Joseph Schiller <tendingcows@ya...>]

Hi,

I have setup a dual boot machine running Windows95 alongside with Linux
Mandrake 7.2.  I've successfully downloaded Java2 SDK 1.4 from
http://www.blackdown.org, but I'm having a difficulty configuring Java
and installing Jython.  I have downloaded the Jython-21.class and I am
following the commands, but bash is complaining about the command
'java'.  The difficulty arose from the 2.0 gig partition limit under
Win95, so I installed Java2 on a different partition, the Linux img file
takes more than 1.0 gigabyte and alongside with Windows there's hardly
any space left to do anything useful.  Because Java does not reside in
the typical /usr/local directory, I need to configure the PATH,
JAVA_HOME, and CLASSPATH variables along with a couple config files.
Using the 'export' command, I thought I did everything correctly, but
I'm still not able to install Jython. Should I edit the ~/.bashrc file
directly? The j2sdk-config file shows PATH=/bin:/usr/bin, the
java-rmi.cgi also shows PATH=/usr/local/java/bin:$PATH and there are
other files that show the same.  At this point I realize that not
installing in the /usr/local/java directory was a mistake, but running
out of space, I had no choice.  Any suggestions will be most welcome.

Sincerely,

Joseph Schiller

[Jython-users] Threading problems, print etc.

[Guy Gascoigne-Piggford <ggp@tr...>]

I have a heavily multi threaded engine that might be executing anywhere up
to 40 or so jython scripts concurrently (generally it's less than 10).  I
create a single PythonInterpreter() and manipulate it's settings in each
thread since it appears that the interpreter is merely an interface to an
engine that gets at it's state based upon a thread local system state
object.
 
Anyway, the problem that I'm running into is that I want to gather any print
output that a script generates and keep each on separate so that I can log
this appropriately, to do this I create a StringWriter and then do an
interpreter.setOut with that writer and gather the output after the script
completes.  What I'm seeing is that generally this works but fairly often
I'm seeing garbled output in the writers where the output of a number of
scripts is mixed up in the buffer.
 
Am I going about this wrong?
 
Failing that, is it possible to simply override the print statement and have
it call one of my own java functions?  I'd rather do this than go through
all of my scripts changing a print statement into a print function.
 
Any suggestions?

Guy
 
-- 
"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are, by
definition, not smart enough to debug it." - Brian W. Kernighan