[Oorexx-devel] [Fwd: Resources held by interpreter not released when using BSF4ooRexx]

[U . Zinngrebe]

Dear all,

is the subject (BSF4ooRexx interacting with the interpreter) acceptable
for this mailing list ?

Thank you for your consideration, Uli Zinngrebe

------------------------- Oorspronkelijk bericht -------------------------
Onderwerp: Resources held by interpreter not released when using BSF4ooRexx
Van:       ericdu...@epo.org
Datum:     Ma, februari 28, 2011 14:35
Aan:       u.zinngr...@inter.nl.net
--------------------------------------------------------------------------

Dear all,

When I run a Rexx script through BSF4ooRexx, it seems that streams that
are opened in a script are not closed when the Rexx interpreter is
finished executing the script.

This code demonstrates the problem:

import org.apache.bsf.*;
public class BSFTestFileHandle {
        public static void main(final String[] args) throws Exception {
                BSFManager bm = new BSFManager();
                testRunScript(bm);
                testRunScript(bm);
        }

        private static void testRunScript(final BSFManager bm) throws
BSFException {
                System.out.print("The result of 'SAY LINES('TEST.TXT')'
should be >0, but is ");
                BSFEngine engine = bm.loadScriptingEngine("rexx");
                engine.exec("test.rexx", -1, -1, "SAY LINES('TEST.TXT')");
        }
}

The test code runs 2 times a Rexx script that opens a file (assuming a
non-empty file called 'TEXT.TXT' exists in the current directory).
The first time it succeeds, the second time it fails.

Expected output:
The result of 'SAY LINES('TEST.TXT')' should be >0, but is 1
The result of 'SAY LINES('TEST.TXT')' should be >0, but is 1

Actual output:
The result of 'SAY LINES('TEST.TXT')' should be >0, but is 1
The result of 'SAY LINES('TEST.TXT')' should be >0, but is 0

Running the same script from the command line works as expected (i.e.
running the following twice on the command line prints '1' twice, as
expected): rexx -E "SAY LINES('TEST.TXT')")

I think there should be a way to have the interpreter shutting down and
thus its held resources being released, either programmatically or for
example in RexxEngine.terminate() and/or RexxEngine.exec() (after
execution of the script).

Best regards,
Erik Duijs

Dear all,

When I run a Rexx script through BSF4ooRexx, it seems that streams that are opened in a script are not closed when the Rexx interpreter is finished executing the script.

This code demonstrates the problem:

import org.apache.bsf.*;
public class BSFTestFileHandle {
        public static void main(final String[] args) throws Exception {
                BSFManager bm = new BSFManager();
                testRunScript(bm);
                testRunScript(bm);
        }

        private static void testRunScript(final BSFManager bm) throws BSFException {
                System.out.print("The result of 'SAY LINES('TEST.TXT')' should be >0, but is ");
                BSFEngine engine = bm.loadScriptingEngine("rexx");
                engine.exec("test.rexx", -1, -1, "SAY LINES('TEST.TXT')");
        }
}

The test code runs 2 times a Rexx script that opens a file (assuming a non-empty file called 'TEXT.TXT' exists in the current directory).
The first time it succeeds, the second time it fails.

Expected output:
The result of 'SAY LINES('TEST.TXT')' should be >0, but is 1
The result of 'SAY LINES('TEST.TXT')' should be >0, but is 1

Actual output:
The result of 'SAY LINES('TEST.TXT')' should be >0, but is 1
The result of 'SAY LINES('TEST.TXT')' should be >0, but is 0

Running the same script from the command line works as expected (i.e. running the following twice on the command line prints '1' twice, as expected): rexx -E "SAY LINES('TEST.TXT')")

I think there should be a way to have the interpreter shutting down and thus its held resources being released, either programmatically or for example in RexxEngine.terminate() and/or RexxEngine.exec() (after execution of the script).

Best regards,
Erik Duijs

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