gmane.comp.apache.logging.log4cxx.user

log4cxx WinCE support

Hamidreza Hosseini — 2012-05-13T12:29:36

Hi,

I saw an issue on log4cxx ASF JIRA (
https://issues.apache.org/jira/browse/LOGCXX-147) which had description
"Most of the changes necessary to get log4cxx to run under WinCE are
changes to APR and APR-util which will be filed as bugs against them and
may be patched into APR in later commits." I searched through the web and
log4cxx and APR mailing lists, but could not find any useful info.

Does current version of log4cxx support WinCE?

Squelching NDC output?

Christopher Nagel — 2012-05-09T22:02:18

Hi,

I have a pattern layout that includes "<%x>" because my app has 20 threaded
objects I want to keep track of. Unfortunately, log4cxx prints "<null>" for
all the times when there is no NDC.

Is there a pattern specifier that will make it just *be* null instead of
printing "null"?  If not, could someone direct me to the part of the code I
can look for how to implement it?

Thanks,
Chris

Re: Trapping printf?

Thorsten Schöning — 2012-05-09T18:45:28

Guten Tag Christopher Nagel,
am Mittwoch, 9. Mai 2012 um 20:07 schrieben Sie:


I would consider writing a little parser which redirects stdout etc.
to itself and uses proper loggers, maybe even depending on the output
of the binary libs if it is unique enough to distinct. With Windows
using GetStdHandle and SetStdHandle sounds good.

http://msdn.microsoft.com/en-us/library/windows/desktop/ms683231(v=vs.85).aspx
Mit freundlichen Grüßen,

Thorsten Schöning

Trapping printf?

Christopher Nagel — 2012-05-09T18:07:48

Hi,

I've just added log4cxx to a small codebase but a lot of its logging is
done by (binary) libraries using printf, cout, cerr, etc.  Is there a way
to trap these console outputs in my log file with an appender?

One way I am considering doing it is configure a console appender for the
log4cxx calls and then just redirect everything to the file.  This doesn't
get me a rollingfileappender though...unless... Can an appender append to
an appender?

What would you do?

Thanks,
Chris

RE: Problems installing log4cxx v 0.10.0 using Microsoft Visual Studio 2010 Express C++ edition

2012-05-03T17:41:42

Thank you both for your help I was able to successfully build the files on VS2010 using VS2008 as an intermediate point.

Michael

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-----Original Message-----
From: Vlietstra, Joe (ES) [mailto:Joe.Vlietstra< at >ngc.com] 
Sent: Thursday, May 03, 2012 9:28 AM
To: Log4CXX User
Subject: RE: Problems installing log4cxx v 0.10.0 using Microsoft Visual Studio 2010 Express C++ edition

We have successfully migrated Log4CXX to VS2010 using the project co

RE: Problems installing log4cxx v 0.10.0 using Microsoft Visual Studio 2010 Express C++ edition

Vlietstra, Joe (ES — 2012-05-03T16:27:39

We have successfully migrated Log4CXX to VS2010 using the project conversion
sequence VS6 -> VS2008 -> VS2010 as described in the Microsoft Connect page
(shown in message below).  Problem of importing a VS6 project into VS2010 is
not limited to the Express edition, we have the Professional edition and still
had to use VS2008 as an intermediate point.

Another point when migrating to VS2010.  VS2010 has some differences in the
directory search paths.  In particular, some of the PC-specific paths are now
part of the project settings.

Good Luck
Joe Vlietstra

-----Original Message-----
From: Thorsten Schöning [mailto:tschoening< at >am-soft.de] 
Sent: Wednesday, May 02, 2012 10:01 PM
To: Log4CXX User
Subject: EXT :Re: Problems installing log4cxx v 0.10.0 using Microsoft Visual Studio 2010 Express C++ edition

Guten Tag Michael.Garcia< at >gdc4s.com,
am Donnerstag, 3. Mai 2012 um 01:24 schrieben Sie:


I don't know which version the project files are for, but maybe the
following will help:

http://connect.microsoft.com/

Re: Problems installing log4cxx v 0.10.0 using Microsoft Visual Studio 2010 Express C++ edition

Thorsten Schöning — 2012-05-03T05:00:59

Guten Tag Michael.Garcia< at >gdc4s.com,
am Donnerstag, 3. Mai 2012 um 01:24 schrieben Sie:


I don't know which version the project files are for, but maybe the
following will help:

http://connect.microsoft.com/VisualStudio/feedback/details/595054/visual-c-2010-express-cannot-open-visual-c-6-0-projects

Mit freundlichen Grüßen,

Thorsten Schöning

Problems installing log4cxx v 0.10.0 using Microsoft Visual Studio 2010 Express C++ edition

2012-05-02T23:24:50

Hi,

I am running on a windows 7 host running VS2010 express c++ edition.
I've followed the directions per the log4cxx directions ( ) including
downloading apr-1.4.6 and apr-util-1.4.1 and modifying the .hw files,
however, when I try to load the log4cxx.dsw solution and convert it to
the current VS, I receive an error trying to build apr.dsp and a bunch
of other dependent .dsp files. 

Specifically, what I am seeing is:
The Project file 'C:...projects\apr-util\xml\expat\lib\xml.dsp' cannot
be loaded. Do you want to remove the unloadable project from the
solution?


Then in the output box in VS  the following is shown:
C:\apache-log4cxx-0.10.0\apr\apr.dsp : error  : Project upgrade failed.

C:\apache-log4cxx-0.10.0\apr-util\xml\expat\lib\xml.dsp : error  :
Project upgrade failed.

C:\apache-log4cxx-0.10.0\apr-util\aprutil.dsp : error  : Project upgrade
failed.

C:\apache-log4cxx-0.10.0\apache-log4cxx-0.10.0\projects\log4cxx.dsp :
error  : Project upgrade failed.


I appreciate any help you can provide me in t

RE: Usage in embedded Systems

Ken Sheldon — 2012-04-26T12:00:01

I think the assumption is that if you need a real-time OS, then you have a real-time application.

You may need to pay particular attention to the buffering of log messages to ensure your use of logging has no measurable negative impact on the performance of your real-time application.

-----Original Message-----
From: Sven Müller [mailto:sven.mueller< at >uni-oldenburg.de] 
Sent: Thursday, April 26, 2012 5:10 AM
To: Log4CXX User
Subject: Re: Usage in embedded Systems

Rhosyn wrote:

In fact, I am targeting an embedded real-time os. Why would there be a
difference to using log4cxx in an embedded "non-real-time" os?

Regards,
Sven Müller.

Re: Usage in embedded Systems

Sven Müller — 2012-04-26T10:10:18

In fact, I am targeting an embedded real-time os. Why would there be a
difference to using log4cxx in an embedded "non-real-time" os?

Regards,
Sven Müller.

Re: Usage in embedded Systems

Rhosyn — 2012-04-20T15:06:38

As ever, it depends on the nature of your embedded platform and your usage
of log4cxx :)

We've used log4cxx successfully for a number of years in a Linux based
appliance product.

You might well find it less appropriate for your needs if you're targeting
an embedded RTOS, for example.



On 20 April 2012 15:19, Sven Müller <sven.mueller< at >uni-oldenburg.de> wrote:

Usage in embedded Systems

Sven Müller — 2012-04-20T14:19:07

Hi,

is log4cxx suitable for usage in embedded systems?

Regards,
Sven Müller.

Re: How to set LockingModel in Log4cxx (if possible)

Thorsten Schöning — 2012-04-12T09:08:44

Guten Tag Millard, Andy,
am Mittwoch, 11. April 2012 um 23:44 schrieben Sie:


No. Why do you think it should be if even the appender name is log4net
specific? :-)


Use another Editor to view the file. If Notepad can open the file, the
problem is not with the file locking, because it's locked by the
logging process to be readable by others, but with the editor which
can't open the file unless it is able to get an exclusive lock.
TextPad for example is able to open logfiles in use, too. I don't
think there's any other solution because locking the file by the
logging process to be the only one which can write to the logfile
seems fine and logical to me.

Mit freundlichen Grüßen,

Thorsten Schöning

AUTO: Chhavi Agarwal is out of the office (returning 04/16/2012)

Chhavi Agarwal — 2012-04-11T22:30:46

I am out of the office until 04/16/2012.

On Vacation.
Please contact Imran.kazi< at >in.ibm.com ( Imranuddin W Kazi )l for any project
related queries.
If urgent call me 9740335000


Note: This is an automated response to your message  "How to set
LockingModel in Log4cxx (if possible)" sent on 12/4/12 3:14:20.

This is the only notification you will receive while this person is away.

How to set LockingModel in Log4cxx (if possible)

Millard, Andy — 2012-04-11T21:44:20

Is LockingModel implemented for log4cxx (0.10.0) as it is for Log4Net ?

 

For example, in RollingFileAppender

 

  <lockingModel type="log4net.Appender.FileAppender+InterProcessLock" />

or

  <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />

 

It doesn't appear to be working for me. Maybe I have something
configured incorrectly but I would like to know if the feature is even
enabled before I waste too much time getting it to work. 

 

The objective is to permit viewing of an active log file (on Windows)
using tools other than Notepad.  WordPad and other editors are failing
to open the file because they file is in use. Notepad allows the file to
be viewed without any error.

 

If this is not supported in Log4cxx 0.10.0 what are the alternatives?
E.g. suggested code changes to log4cxx itself?  A later release of
log4cxx, although I have not found one.

 

Thanks



"Misys" is the trade name for Misys plc (registered in England and Wales). Registration Number: 01360027. Registered office

Re: Log4cxx licensing

drkmkzs — 2012-03-27T09:13:22

Sorry for spamming, I would have looked firstly at configure options,
the use of DB lib is an option ... So compiling the source code is a
solution

2012/3/20, drkmkzs <drkmkzs< at >gmail.com>:

Re: Log4cxx licensing

drkmkzs — 2012-03-27T08:57:02

Hi again Johnny,

As i'm currently working on Fedora, i've looked at log4cxx RPMs for
this distribution, and there is the Berkeley dependance too... And
reading the SleepyCat license, it seems that you were right about the
use of this library in proprietary software.

Anyway, it depends in my understanding of english (ouch) and
understanding of text license (ouch 2)... By reading the license it
seems that the source of any software using it should be available,
but maybe is it considered that log4cxx uses the DB lib, and your
software only use log4cxx ? Quite complicated, but it's true it's
quite strange to see such a dependance in a software under the Apache
License 2...

2012/3/20, Johnny Njåstad <Johnny.Njaastad< at >tomra.no>:

RE: Log4cxx licensing

Johnny Njåstad — 2012-03-20T10:36:08

Hi,

Thanks for your reply. I can try doing it from the sources myself.

Johnny


-----Original Message-----
From: drkmkzs [mailto:drkmkzs< at >gmail.com] 
Sent: 20. mars 2012 09:51
To: Log4CXX User
Subject: Re: Log4cxx licensing

Hi,

I'm currently using Log4cxx on a Suse 10.3, but I started from the
sources (compiling apr, apr-utils and log4cxx).

I don't have so many dependencies that you have (maybe because I
compiled apr and apr-utils in static ?) :
        linux-gate.so.1 =>  (0xffffe000)
        libexpat.so.1 => /lib/libexpat.so.1 (0xb7d04000)
        libuuid.so.1 => /lib/libuuid.so.1 (0xb7cff000)
        librt.so.1 => /lib/librt.so.1 (0xb7cf6000)
        libcrypt.so.1 => /lib/libcrypt.so.1 (0xb7cc4000)
        libpthread.so.0 => /lib/libpthread.so.0 (0xb7cac000)
        libdl.so.2 => /lib/libdl.so.2 (0xb7ca8000)
        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0xb7bba000)
        libm.so.6 => /lib/libm.so.6 (0xb7b95000)
        libc.so.6 => /lib/libc.so.6 (0xb7a62000)
        libgcc_s.so.1 => /lib/libgc

Re: Log4cxx licensing

drkmkzs — 2012-03-20T08:51:00

Hi,

I'm currently using Log4cxx on a Suse 10.3, but I started from the
sources (compiling apr, apr-utils and log4cxx).

I don't have so many dependencies that you have (maybe because I
compiled apr and apr-utils in static ?) :
        linux-gate.so.1 =>  (0xffffe000)
        libexpat.so.1 => /lib/libexpat.so.1 (0xb7d04000)
        libuuid.so.1 => /lib/libuuid.so.1 (0xb7cff000)
        librt.so.1 => /lib/librt.so.1 (0xb7cf6000)
        libcrypt.so.1 => /lib/libcrypt.so.1 (0xb7cc4000)
        libpthread.so.0 => /lib/libpthread.so.0 (0xb7cac000)
        libdl.so.2 => /lib/libdl.so.2 (0xb7ca8000)
        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0xb7bba000)
        libm.so.6 => /lib/libm.so.6 (0xb7b95000)
        libc.so.6 => /lib/libc.so.6 (0xb7a62000)
        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0xb7a56000)
        /lib/ld-linux.so.2 (0x80000000)

Anyway, i don't find back the lib Berkeley DB (libdb4.8) in the list.

In case it could help,
Jean



2012/3/19, Johnny Njåstad <Johnny.Njaastad< at >tomra.no>:

Log4cxx licensing

Johnny Njåstad — 2012-03-19T09:49:55

Hi,

At Tomra we have been happily using log4j as a logging framework for our Java applications, and we now consider using log4cxx for our commercial (closed source) C++ applications. At first glance, that seems ok under the Apache 2 license, but when I inspected the dependencies of log4cxx I found that it depends on the Berkeley DB (libdb4.8) which is licensed under the Sleepycat License. This is a dual license that does not permit use in closed source applications unless we buy a commercial Berkley DB license from Oracle. I was a bit surprised by this finding, since it does not fit well with the permissive Apache 2 license.

I tested log4cxx on Ubuntu 10.4, Debian package liblog4cxx10 version 0.10.0-1.1build1, and looked for dependencies with:
$ ldd /usr/lib/liblog4cxx.so.10
        linux-gate.so.1 =>  (0x00228000)
        libaprutil-1.so.0 => /usr/lib/libaprutil-1.so.0 (0x00a0f000)
        libdb-4.8.so => /usr/lib/libdb-4.8.so (0x00229000)
        libapr-1.so.0 => /usr/lib/libapr-1.so.0 (0x00f5e000)

RE: Valgrind memory issue

chand priyankara — 2012-02-28T02:45:53

Hi Norman, Thorsten Schöning

I was working with vc++ in windows and memory leaks seems to be happen when
debug version of .lib was using in release builds and vice versa.
If correct files were used there is no issue. i used _CRTDBG_MAP_ALLOC to
check memory issues in VC++.