I want to filter out any 16 concurrent numerical digits from any log files. For example if my log message originally is:
"you blah 01234567890123456 foo"
I want it to only log:
"you blah foo"
I do not know what to implement as it looks like filters prevent entire messages from being logged. I want to alter the message to be logged before it is logged.
You can use the replace layout render to wrap your $message in your target layouts, which
Replaces a string in the output of another layout with another string.
Using the following config:
<targets>
<target xsi:type="Console" name="console"
layout="${replace:searchFor=\\d\{17,17\}\\s:replaceWith=:regex=true:inner=${message}}"/>
</targets>
and the following logging code
var logger = LogManager.GetCurrentClassLogger();
logger.Info("you blah 01234567890123456 foo");
This is what is how the console output looks like:
you blah foo
Because you can use any regex you can play with the config in order to correctly remove or keep the white spaces around the numbers, just watch for the encoding of the special characters.
Related
I have syslog message from my device. I am using Rsyslog and want to collect specific message from a specific folder using REGEX expression.
The configuration with the old syntax works as intended:
:msg, regex, "hostname0. %%01SHELL" /var/log/tel/hostname.log
... which produces the following logs (example):
Feb 1 17:41:18 hostname01 %%01SHELL/6/DISPLAY_CMDRECORD(s)[5461]: Recorded display command information. (Task=FW, Ip=**, VpnName=, User=_system_, AuthenticationMethod="Null", Command="display engine statistics system")
Feb 1 17:42:18 hostname02 %%01SHELL/6/DISPLAY_CMDRECORD(s)[5461]: Recorded display command information. (Task=FW, Ip=**, VpnName=, User=_system_, AuthenticationMethod="Null", Command="display engine statistics system")
My template in the new RainerScript syntax, is not working:
template (name="HOST_SHELL" type="string" string="/var/log/tel/%$YEAR%-%$MONTH%-%$DAY%-HOST-SHELL.log")
if re_match($msg, 'hostname0. %%01SHELL')
then {action(type="omfile" dynaFile="HOST_SHELL")
stop
}
But, nothing happens. Maybe there is another way to solve the problem, or correct my template.
In the future planned to filter:
hostname0. %%01ERRORS in folder /var/log/tel/%$YEAR%-%$MONTH%-%$DAY%-HOST-ERRORS.log
In your RainerScript syntax configuration, you are missing the if statement's closing brace } before the stop statement. You should include it after the action statement like this:
template (name="HOST_SHELL" type="string" string="/var/log/tel/%$YEAR%-%$MONTH%-%$DAY%-HOST-SHELL.log")
if re_match($msg, 'hostname0. %%01SHELL') then {
action(type="omfile" dynaFile="HOST_SHELL")
stop
}
Also, you may want to modify the regex pattern to include the dot character (.) in the hostname match pattern. The dot character has a special meaning in regex, and it matches any character. To match the literal dot character, you can escape it with a backslash (.). Here is an updated regex pattern:
if re_match($msg, 'hostname0\..* %%01SHELL') then {
...
}
This should match any message that starts with "hostname0." followed by any characters, then " %%01SHELL"
I have a Mail target to send an email for certain log entries. I would like the subject line to be prepended with "EXCEPTION THROWN:" (including the colon) if the log event includes an exception.
My subject line layout is:
${onexception:inner=EXCEPTION THROWN:}AppName Log Event
But the email sent has a subject line of:
AppName Log Event
None of the literal text within the ${onexception} layout renderer is included. And yes, I am sure an exception was passed. See below.
I thought maybe wrapping it in a literal renderer would help:
${onexception:inner=${literal:text=EXCEPTION THROWN:}}AppName Log Event
This gives me:
EXCEPTION THROWNAppName Log Event
That's better, but still missing the colon. It demonstrates that the issue isn't with a missing exception - the condition is being met because it's including at least some of the string. It's still stripping the colon, though.
Any ideas?
Ugh, nevermind. Posting here in case anyone else does what I did.
I needed to escape the ":". Once that was done, everything started showing up, even without using the ${literal} renderer:
${onexception:inner=EXCEPTION THROWN\:}AppName Log Event
When using Origen for test content generation, is there a standard in practice for logging text? I see in other examples 'ss' and 'cc' as well as places where 'puts' is used.
What is the proper usage for comments that should go into Origen generated test patterns and flow elements, comments that should print during generation, and comments that should only print when debug is on?
Generally puts should never be used except for temporary debugging. The convention in Origen applications is to keep logging as light as possible, this in reaction to many tools in this space which are overly verbose in their logging such that it becomes mostly ignored by users.
So only log to the terminal when you think it is really important by doing this:
Origen.log.info "Something important to tell the user!"
Most of the time, if the information is just for debug purposes, then use:
Origen.log.debug "Some debug help, the value of X is: #{x}"
In that case, then the terminal output will be clean, but you will see the debug info being output when ever you run Origen with the -d switch -verbose switch.
You can read more about other logging options here: http://origen-sdk.org/origen//guides/misc/logger
Additionally, if you are using Origen to generate a pattern, then the cc and ss methods are available.
cc "A low level comment"
Will appear in a pattern like this:
// A low level comment
For the main steps in a pattern you can use ss:
ss "A high level comment"
which will look more emphasized, like this:
//####################################################################
//# A high level comment
//####################################################################
For multi-line step comments, you can use this API:
step_comment do
cc "We are about to do this:"
cc " Blah: blah"
cc " Blah: blah"
end
Which would look like:
//####################################################################
//# We are about to do this:
//# Blah: blah
//# Blah: blah
//####################################################################
You can read more about how to document patterns here: http://origen-sdk.org/origen/guides/pattern/documenting/
In my Nodejs script I have a line, called on demand:
eval(fs.readFileSync('eval.js')+'');
It is done so, because sometimes I want to know about what is going on in my "nodejs script", the content of it's variables.
So, "eval.js" usually represented as:
console.dir(myVar);
The problem is, it outputs in console output. "Parent" script also outputs in console some info, so the console is running very fast and I can't get that I want.
I was searching any way to put all output of file "eval.js" into another file "x.log".
Something like (in "parent" script):
evalFileToLog("eval.js", "x.log");
Or "eval.js":
// something what will forward stdout to "x.log"
console.dir(abc);
// blah blah blah
// something that will restore stdout to it's normal behaviour, like it was before.
Thank you for your help!
You can write to another stream (eg a file or standard error) to separate your outputs, but I highly advise against doing synchronous reads of any file in your program.
Another way to get a view into your app would be to leverage the repl with it you can have a shell in your program instead of flooding the output.
var repl = require('repl');
var bar = new MyApp();
relp.start({
foo: bar
});
And now you have bar exposed in your shell.
In java you could use System.out.println() to print a blank line but how does it work with log4j in a logfile?
There I also want to have one or more blank lines inside the logfile.
I already read the follwing:
log4j how to append blank line
But this is not really helpful because with
logger.debug("\n");
logger.debug("");
you do not print a message but other information like time and so on (the layout of the logger) are still stored inside the logfile. But I just want to have a total empty line.
Can anyone help me please?
Log4j is not designed to write blank lines.
You cannot find this option in the logger, because the logger is independent of his appenders who write to a file or the console or something different.
I think you need to create your custom FileAppender which checks the Logging Message before the writing. If your message.equals("\n"); you append a blank line without the layout by accessing the file by your own and skip the normal logging with the layout. then you can use Logger.debug("\n");
Also it is a bad practice to add blank lines. It is similar to split your Log-Message over several lines. Your want all your Logmessage in one line each, so they are easy to parse for LogViewer-Tools like chainsaw or OtrosLogViewer One exception are Stacktraces.
Create your own appender with empty layout and a logger that uses that appender. Then write the blank line using that logger. Make certain to set the additivity attribute for logger to false so that the root logger doesn't write the message using the formatting of its appenders.